[Intel-gfx] [PATCH v2 01/17] drm/i915/pps: abstract panel power sequencer from intel_dp.c
Jani Nikula
jani.nikula at intel.com
Wed Jan 13 15:34:15 UTC 2021
Anshuman, thanks a bunch for the reviews, much appreciated!
...but may I ask for reviews on this one too, as starting to push the
patches hinges on the first one. I'd rather start pushing the ready ones
than repost the entire series for the required changes.
Thanks,
Jani.
On Fri, 08 Jan 2021, Jani Nikula <jani.nikula at intel.com> wrote:
> In a long overdue refactoring, split out all panel sequencer code from
> intel_dp.c to new intel_pps.[ch].
>
> The first part is mostly just code movement as-is, without cleanups or
> functional changes.
>
> We need to add a vlv_get_dpll() helper to get at the vlv/chv dpll from
> pps code.
>
> v2: Rebase.
>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> drivers/gpu/drm/i915/display/intel_ddi.c | 1 +
> .../drm/i915/display/intel_display_power.c | 2 +-
> drivers/gpu/drm/i915/display/intel_dp.c | 1436 +----------------
> drivers/gpu/drm/i915/display/intel_dp.h | 5 +-
> drivers/gpu/drm/i915/display/intel_pps.c | 1334 +++++++++++++++
> drivers/gpu/drm/i915/display/intel_pps.h | 53 +
> 7 files changed, 1443 insertions(+), 1389 deletions(-)
> create mode 100644 drivers/gpu/drm/i915/display/intel_pps.c
> create mode 100644 drivers/gpu/drm/i915/display/intel_pps.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 4074d8cb0d6e..8a04403a11bb 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -251,6 +251,7 @@ i915-y += \
> display/intel_lspcon.o \
> display/intel_lvds.o \
> display/intel_panel.o \
> + display/intel_pps.o \
> display/intel_sdvo.o \
> display/intel_tv.o \
> display/intel_vdsc.o \
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 3df6913369bc..f09a597bf730 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -46,6 +46,7 @@
> #include "intel_hotplug.h"
> #include "intel_lspcon.h"
> #include "intel_panel.h"
> +#include "intel_pps.h"
> #include "intel_psr.h"
> #include "intel_sprite.h"
> #include "intel_tc.h"
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
> index d52374f01316..a11bd8213df4 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> @@ -4,7 +4,6 @@
> */
>
> #include "display/intel_crt.h"
> -#include "display/intel_dp.h"
>
> #include "i915_drv.h"
> #include "i915_irq.h"
> @@ -16,6 +15,7 @@
> #include "intel_dpio_phy.h"
> #include "intel_hotplug.h"
> #include "intel_pm.h"
> +#include "intel_pps.h"
> #include "intel_sideband.h"
> #include "intel_tc.h"
> #include "intel_vga.h"
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 4f190a82d4ad..07279b10812e 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -58,6 +58,7 @@
> #include "intel_lspcon.h"
> #include "intel_lvds.h"
> #include "intel_panel.h"
> +#include "intel_pps.h"
> #include "intel_psr.h"
> #include "intel_sideband.h"
> #include "intel_tc.h"
> @@ -121,6 +122,11 @@ static const struct dp_link_dpll chv_dpll[] = {
> { .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
> };
>
> +const struct dpll *vlv_get_dpll(struct drm_i915_private *i915)
> +{
> + return IS_CHERRYVIEW(i915) ? &chv_dpll[0].dpll : &vlv_dpll[0].dpll;
> +}
> +
> /* Constants for DP DSC configurations */
> static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};
>
> @@ -145,12 +151,6 @@ bool intel_dp_is_edp(struct intel_dp *intel_dp)
>
> static void intel_dp_link_down(struct intel_encoder *encoder,
> const struct intel_crtc_state *old_crtc_state);
> -static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
> -static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
> -static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
> - const struct intel_crtc_state *crtc_state);
> -static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
> - enum pipe pipe);
> static void intel_dp_unset_edid(struct intel_dp *intel_dp);
>
> /* update sink rates from dpcd */
> @@ -877,447 +877,6 @@ static void intel_dp_unpack_aux(u32 src, u8 *dst, int dst_bytes)
> dst[i] = src >> ((3-i) * 8);
> }
>
> -static void
> -intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp);
> -static void
> -intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
> - bool force_disable_vdd);
> -static void
> -intel_dp_pps_init(struct intel_dp *intel_dp);
> -
> -static intel_wakeref_t
> -pps_lock(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - intel_wakeref_t wakeref;
> -
> - /*
> - * See intel_power_sequencer_reset() why we need
> - * a power domain reference here.
> - */
> - wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
> - mutex_lock(&dev_priv->pps_mutex);
> -
> - return wakeref;
> -}
> -
> -static intel_wakeref_t
> -pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - mutex_unlock(&dev_priv->pps_mutex);
> - intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
> - return 0;
> -}
> -
> -#define with_pps_lock(dp, wf) \
> - for ((wf) = pps_lock(dp); (wf); (wf) = pps_unlock((dp), (wf)))
> -
> -static void
> -vlv_power_sequencer_kick(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - enum pipe pipe = intel_dp->pps_pipe;
> - bool pll_enabled, release_cl_override = false;
> - enum dpio_phy phy = DPIO_PHY(pipe);
> - enum dpio_channel ch = vlv_pipe_to_channel(pipe);
> - u32 DP;
> -
> - if (drm_WARN(&dev_priv->drm,
> - intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN,
> - "skipping pipe %c power sequencer kick due to [ENCODER:%d:%s] being active\n",
> - pipe_name(pipe), dig_port->base.base.base.id,
> - dig_port->base.base.name))
> - return;
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "kicking pipe %c power sequencer for [ENCODER:%d:%s]\n",
> - pipe_name(pipe), dig_port->base.base.base.id,
> - dig_port->base.base.name);
> -
> - /* Preserve the BIOS-computed detected bit. This is
> - * supposed to be read-only.
> - */
> - DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
> - DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
> - DP |= DP_PORT_WIDTH(1);
> - DP |= DP_LINK_TRAIN_PAT_1;
> -
> - if (IS_CHERRYVIEW(dev_priv))
> - DP |= DP_PIPE_SEL_CHV(pipe);
> - else
> - DP |= DP_PIPE_SEL(pipe);
> -
> - pll_enabled = intel_de_read(dev_priv, DPLL(pipe)) & DPLL_VCO_ENABLE;
> -
> - /*
> - * The DPLL for the pipe must be enabled for this to work.
> - * So enable temporarily it if it's not already enabled.
> - */
> - if (!pll_enabled) {
> - release_cl_override = IS_CHERRYVIEW(dev_priv) &&
> - !chv_phy_powergate_ch(dev_priv, phy, ch, true);
> -
> - if (vlv_force_pll_on(dev_priv, pipe, IS_CHERRYVIEW(dev_priv) ?
> - &chv_dpll[0].dpll : &vlv_dpll[0].dpll)) {
> - drm_err(&dev_priv->drm,
> - "Failed to force on pll for pipe %c!\n",
> - pipe_name(pipe));
> - return;
> - }
> - }
> -
> - /*
> - * Similar magic as in intel_dp_enable_port().
> - * We _must_ do this port enable + disable trick
> - * to make this power sequencer lock onto the port.
> - * Otherwise even VDD force bit won't work.
> - */
> - intel_de_write(dev_priv, intel_dp->output_reg, DP);
> - intel_de_posting_read(dev_priv, intel_dp->output_reg);
> -
> - intel_de_write(dev_priv, intel_dp->output_reg, DP | DP_PORT_EN);
> - intel_de_posting_read(dev_priv, intel_dp->output_reg);
> -
> - intel_de_write(dev_priv, intel_dp->output_reg, DP & ~DP_PORT_EN);
> - intel_de_posting_read(dev_priv, intel_dp->output_reg);
> -
> - if (!pll_enabled) {
> - vlv_force_pll_off(dev_priv, pipe);
> -
> - if (release_cl_override)
> - chv_phy_powergate_ch(dev_priv, phy, ch, false);
> - }
> -}
> -
> -static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
> -{
> - struct intel_encoder *encoder;
> - unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
> -
> - /*
> - * We don't have power sequencer currently.
> - * Pick one that's not used by other ports.
> - */
> - for_each_intel_dp(&dev_priv->drm, encoder) {
> - struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> -
> - if (encoder->type == INTEL_OUTPUT_EDP) {
> - drm_WARN_ON(&dev_priv->drm,
> - intel_dp->active_pipe != INVALID_PIPE &&
> - intel_dp->active_pipe !=
> - intel_dp->pps_pipe);
> -
> - if (intel_dp->pps_pipe != INVALID_PIPE)
> - pipes &= ~(1 << intel_dp->pps_pipe);
> - } else {
> - drm_WARN_ON(&dev_priv->drm,
> - intel_dp->pps_pipe != INVALID_PIPE);
> -
> - if (intel_dp->active_pipe != INVALID_PIPE)
> - pipes &= ~(1 << intel_dp->active_pipe);
> - }
> - }
> -
> - if (pipes == 0)
> - return INVALID_PIPE;
> -
> - return ffs(pipes) - 1;
> -}
> -
> -static enum pipe
> -vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - enum pipe pipe;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - /* We should never land here with regular DP ports */
> - drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> -
> - drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE &&
> - intel_dp->active_pipe != intel_dp->pps_pipe);
> -
> - if (intel_dp->pps_pipe != INVALID_PIPE)
> - return intel_dp->pps_pipe;
> -
> - pipe = vlv_find_free_pps(dev_priv);
> -
> - /*
> - * Didn't find one. This should not happen since there
> - * are two power sequencers and up to two eDP ports.
> - */
> - if (drm_WARN_ON(&dev_priv->drm, pipe == INVALID_PIPE))
> - pipe = PIPE_A;
> -
> - vlv_steal_power_sequencer(dev_priv, pipe);
> - intel_dp->pps_pipe = pipe;
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "picked pipe %c power sequencer for [ENCODER:%d:%s]\n",
> - pipe_name(intel_dp->pps_pipe),
> - dig_port->base.base.base.id,
> - dig_port->base.base.name);
> -
> - /* init power sequencer on this pipe and port */
> - intel_dp_init_panel_power_sequencer(intel_dp);
> - intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
> -
> - /*
> - * Even vdd force doesn't work until we've made
> - * the power sequencer lock in on the port.
> - */
> - vlv_power_sequencer_kick(intel_dp);
> -
> - return intel_dp->pps_pipe;
> -}
> -
> -static int
> -bxt_power_sequencer_idx(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - int backlight_controller = dev_priv->vbt.backlight.controller;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - /* We should never land here with regular DP ports */
> - drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> -
> - if (!intel_dp->pps_reset)
> - return backlight_controller;
> -
> - intel_dp->pps_reset = false;
> -
> - /*
> - * Only the HW needs to be reprogrammed, the SW state is fixed and
> - * has been setup during connector init.
> - */
> - intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> -
> - return backlight_controller;
> -}
> -
> -typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
> - enum pipe pipe);
> -
> -static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
> - enum pipe pipe)
> -{
> - return intel_de_read(dev_priv, PP_STATUS(pipe)) & PP_ON;
> -}
> -
> -static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
> - enum pipe pipe)
> -{
> - return intel_de_read(dev_priv, PP_CONTROL(pipe)) & EDP_FORCE_VDD;
> -}
> -
> -static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
> - enum pipe pipe)
> -{
> - return true;
> -}
> -
> -static enum pipe
> -vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
> - enum port port,
> - vlv_pipe_check pipe_check)
> -{
> - enum pipe pipe;
> -
> - for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
> - u32 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(pipe)) &
> - PANEL_PORT_SELECT_MASK;
> -
> - if (port_sel != PANEL_PORT_SELECT_VLV(port))
> - continue;
> -
> - if (!pipe_check(dev_priv, pipe))
> - continue;
> -
> - return pipe;
> - }
> -
> - return INVALID_PIPE;
> -}
> -
> -static void
> -vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - enum port port = dig_port->base.port;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - /* try to find a pipe with this port selected */
> - /* first pick one where the panel is on */
> - intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> - vlv_pipe_has_pp_on);
> - /* didn't find one? pick one where vdd is on */
> - if (intel_dp->pps_pipe == INVALID_PIPE)
> - intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> - vlv_pipe_has_vdd_on);
> - /* didn't find one? pick one with just the correct port */
> - if (intel_dp->pps_pipe == INVALID_PIPE)
> - intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> - vlv_pipe_any);
> -
> - /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
> - if (intel_dp->pps_pipe == INVALID_PIPE) {
> - drm_dbg_kms(&dev_priv->drm,
> - "no initial power sequencer for [ENCODER:%d:%s]\n",
> - dig_port->base.base.base.id,
> - dig_port->base.base.name);
> - return;
> - }
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "initial power sequencer for [ENCODER:%d:%s]: pipe %c\n",
> - dig_port->base.base.base.id,
> - dig_port->base.base.name,
> - pipe_name(intel_dp->pps_pipe));
> -
> - intel_dp_init_panel_power_sequencer(intel_dp);
> - intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> -}
> -
> -void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
> -{
> - struct intel_encoder *encoder;
> -
> - if (drm_WARN_ON(&dev_priv->drm,
> - !(IS_VALLEYVIEW(dev_priv) ||
> - IS_CHERRYVIEW(dev_priv) ||
> - IS_GEN9_LP(dev_priv))))
> - return;
> -
> - /*
> - * We can't grab pps_mutex here due to deadlock with power_domain
> - * mutex when power_domain functions are called while holding pps_mutex.
> - * That also means that in order to use pps_pipe the code needs to
> - * hold both a power domain reference and pps_mutex, and the power domain
> - * reference get/put must be done while _not_ holding pps_mutex.
> - * pps_{lock,unlock}() do these steps in the correct order, so one
> - * should use them always.
> - */
> -
> - for_each_intel_dp(&dev_priv->drm, encoder) {
> - struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> -
> - drm_WARN_ON(&dev_priv->drm,
> - intel_dp->active_pipe != INVALID_PIPE);
> -
> - if (encoder->type != INTEL_OUTPUT_EDP)
> - continue;
> -
> - if (IS_GEN9_LP(dev_priv))
> - intel_dp->pps_reset = true;
> - else
> - intel_dp->pps_pipe = INVALID_PIPE;
> - }
> -}
> -
> -struct pps_registers {
> - i915_reg_t pp_ctrl;
> - i915_reg_t pp_stat;
> - i915_reg_t pp_on;
> - i915_reg_t pp_off;
> - i915_reg_t pp_div;
> -};
> -
> -static void intel_pps_get_registers(struct intel_dp *intel_dp,
> - struct pps_registers *regs)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - int pps_idx = 0;
> -
> - memset(regs, 0, sizeof(*regs));
> -
> - if (IS_GEN9_LP(dev_priv))
> - pps_idx = bxt_power_sequencer_idx(intel_dp);
> - else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> - pps_idx = vlv_power_sequencer_pipe(intel_dp);
> -
> - regs->pp_ctrl = PP_CONTROL(pps_idx);
> - regs->pp_stat = PP_STATUS(pps_idx);
> - regs->pp_on = PP_ON_DELAYS(pps_idx);
> - regs->pp_off = PP_OFF_DELAYS(pps_idx);
> -
> - /* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
> - if (IS_GEN9_LP(dev_priv) || INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
> - regs->pp_div = INVALID_MMIO_REG;
> - else
> - regs->pp_div = PP_DIVISOR(pps_idx);
> -}
> -
> -static i915_reg_t
> -_pp_ctrl_reg(struct intel_dp *intel_dp)
> -{
> - struct pps_registers regs;
> -
> - intel_pps_get_registers(intel_dp, ®s);
> -
> - return regs.pp_ctrl;
> -}
> -
> -static i915_reg_t
> -_pp_stat_reg(struct intel_dp *intel_dp)
> -{
> - struct pps_registers regs;
> -
> - intel_pps_get_registers(intel_dp, ®s);
> -
> - return regs.pp_stat;
> -}
> -
> -static bool edp_have_panel_power(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> - intel_dp->pps_pipe == INVALID_PIPE)
> - return false;
> -
> - return (intel_de_read(dev_priv, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
> -}
> -
> -static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> - intel_dp->pps_pipe == INVALID_PIPE)
> - return false;
> -
> - return intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
> -}
> -
> -static void
> -intel_dp_check_edp(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
> - drm_WARN(&dev_priv->drm, 1,
> - "eDP powered off while attempting aux channel communication.\n");
> - drm_dbg_kms(&dev_priv->drm, "Status 0x%08x Control 0x%08x\n",
> - intel_de_read(dev_priv, _pp_stat_reg(intel_dp)),
> - intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)));
> - }
> -}
> -
> static u32
> intel_dp_aux_wait_done(struct intel_dp *intel_dp)
> {
> @@ -2931,491 +2490,66 @@ static void intel_dp_prepare(struct intel_encoder *encoder,
> * IBX PCH and CPU are the same for almost everything,
> * except that the CPU DP PLL is configured in this
> * register
> - *
> - * CPT PCH is quite different, having many bits moved
> - * to the TRANS_DP_CTL register instead. That
> - * configuration happens (oddly) in ilk_pch_enable
> - */
> -
> - /* Preserve the BIOS-computed detected bit. This is
> - * supposed to be read-only.
> - */
> - intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
> -
> - /* Handle DP bits in common between all three register formats */
> - intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
> - intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
> -
> - /* Split out the IBX/CPU vs CPT settings */
> -
> - if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
> - if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
> - intel_dp->DP |= DP_SYNC_HS_HIGH;
> - if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
> - intel_dp->DP |= DP_SYNC_VS_HIGH;
> - intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
> -
> - if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> - intel_dp->DP |= DP_ENHANCED_FRAMING;
> -
> - intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
> - } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
> - u32 trans_dp;
> -
> - intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
> -
> - trans_dp = intel_de_read(dev_priv, TRANS_DP_CTL(crtc->pipe));
> - if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> - trans_dp |= TRANS_DP_ENH_FRAMING;
> - else
> - trans_dp &= ~TRANS_DP_ENH_FRAMING;
> - intel_de_write(dev_priv, TRANS_DP_CTL(crtc->pipe), trans_dp);
> - } else {
> - if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
> - intel_dp->DP |= DP_COLOR_RANGE_16_235;
> -
> - if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
> - intel_dp->DP |= DP_SYNC_HS_HIGH;
> - if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
> - intel_dp->DP |= DP_SYNC_VS_HIGH;
> - intel_dp->DP |= DP_LINK_TRAIN_OFF;
> -
> - if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> - intel_dp->DP |= DP_ENHANCED_FRAMING;
> -
> - if (IS_CHERRYVIEW(dev_priv))
> - intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe);
> - else
> - intel_dp->DP |= DP_PIPE_SEL(crtc->pipe);
> - }
> -}
> -
> -#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
> -#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
> -
> -#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
> -#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
> -
> -#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
> -#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
> -
> -static void intel_pps_verify_state(struct intel_dp *intel_dp);
> -
> -static void wait_panel_status(struct intel_dp *intel_dp,
> - u32 mask,
> - u32 value)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - i915_reg_t pp_stat_reg, pp_ctrl_reg;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - intel_pps_verify_state(intel_dp);
> -
> - pp_stat_reg = _pp_stat_reg(intel_dp);
> - pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "mask %08x value %08x status %08x control %08x\n",
> - mask, value,
> - intel_de_read(dev_priv, pp_stat_reg),
> - intel_de_read(dev_priv, pp_ctrl_reg));
> -
> - if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
> - mask, value, 5000))
> - drm_err(&dev_priv->drm,
> - "Panel status timeout: status %08x control %08x\n",
> - intel_de_read(dev_priv, pp_stat_reg),
> - intel_de_read(dev_priv, pp_ctrl_reg));
> -
> - drm_dbg_kms(&dev_priv->drm, "Wait complete\n");
> -}
> -
> -static void wait_panel_on(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> -
> - drm_dbg_kms(&i915->drm, "Wait for panel power on\n");
> - wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
> -}
> -
> -static void wait_panel_off(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> -
> - drm_dbg_kms(&i915->drm, "Wait for panel power off time\n");
> - wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
> -}
> -
> -static void wait_panel_power_cycle(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> - ktime_t panel_power_on_time;
> - s64 panel_power_off_duration;
> -
> - drm_dbg_kms(&i915->drm, "Wait for panel power cycle\n");
> -
> - /* take the difference of currrent time and panel power off time
> - * and then make panel wait for t11_t12 if needed. */
> - panel_power_on_time = ktime_get_boottime();
> - panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
> -
> - /* When we disable the VDD override bit last we have to do the manual
> - * wait. */
> - if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
> - wait_remaining_ms_from_jiffies(jiffies,
> - intel_dp->panel_power_cycle_delay - panel_power_off_duration);
> -
> - wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
> -}
> -
> -static void wait_backlight_on(struct intel_dp *intel_dp)
> -{
> - wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
> - intel_dp->backlight_on_delay);
> -}
> -
> -static void edp_wait_backlight_off(struct intel_dp *intel_dp)
> -{
> - wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
> - intel_dp->backlight_off_delay);
> -}
> -
> -/* Read the current pp_control value, unlocking the register if it
> - * is locked
> - */
> -
> -static u32 ilk_get_pp_control(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - u32 control;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
> - if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
> - (control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
> - control &= ~PANEL_UNLOCK_MASK;
> - control |= PANEL_UNLOCK_REGS;
> - }
> - return control;
> -}
> -
> -/*
> - * Must be paired with edp_panel_vdd_off().
> - * Must hold pps_mutex around the whole on/off sequence.
> - * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
> - */
> -static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - u32 pp;
> - i915_reg_t pp_stat_reg, pp_ctrl_reg;
> - bool need_to_disable = !intel_dp->want_panel_vdd;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return false;
> -
> - cancel_delayed_work(&intel_dp->panel_vdd_work);
> - intel_dp->want_panel_vdd = true;
> -
> - if (edp_have_panel_vdd(intel_dp))
> - return need_to_disable;
> -
> - drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
> - intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
> - intel_aux_power_domain(dig_port));
> -
> - drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD on\n",
> - dig_port->base.base.base.id,
> - dig_port->base.base.name);
> -
> - if (!edp_have_panel_power(intel_dp))
> - wait_panel_power_cycle(intel_dp);
> -
> - pp = ilk_get_pp_control(intel_dp);
> - pp |= EDP_FORCE_VDD;
> -
> - pp_stat_reg = _pp_stat_reg(intel_dp);
> - pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> -
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> - drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> - intel_de_read(dev_priv, pp_stat_reg),
> - intel_de_read(dev_priv, pp_ctrl_reg));
> - /*
> - * If the panel wasn't on, delay before accessing aux channel
> - */
> - if (!edp_have_panel_power(intel_dp)) {
> - drm_dbg_kms(&dev_priv->drm,
> - "[ENCODER:%d:%s] panel power wasn't enabled\n",
> - dig_port->base.base.base.id,
> - dig_port->base.base.name);
> - msleep(intel_dp->panel_power_up_delay);
> - }
> -
> - return need_to_disable;
> -}
> -
> -/*
> - * Must be paired with intel_edp_panel_vdd_off() or
> - * intel_edp_panel_off().
> - * Nested calls to these functions are not allowed since
> - * we drop the lock. Caller must use some higher level
> - * locking to prevent nested calls from other threads.
> - */
> -void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
> -{
> - intel_wakeref_t wakeref;
> - bool vdd;
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - vdd = false;
> - with_pps_lock(intel_dp, wakeref)
> - vdd = edp_panel_vdd_on(intel_dp);
> - I915_STATE_WARN(!vdd, "[ENCODER:%d:%s] VDD already requested on\n",
> - dp_to_dig_port(intel_dp)->base.base.base.id,
> - dp_to_dig_port(intel_dp)->base.base.name);
> -}
> -
> -static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port =
> - dp_to_dig_port(intel_dp);
> - u32 pp;
> - i915_reg_t pp_stat_reg, pp_ctrl_reg;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - drm_WARN_ON(&dev_priv->drm, intel_dp->want_panel_vdd);
> -
> - if (!edp_have_panel_vdd(intel_dp))
> - return;
> -
> - drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD off\n",
> - dig_port->base.base.base.id,
> - dig_port->base.base.name);
> -
> - pp = ilk_get_pp_control(intel_dp);
> - pp &= ~EDP_FORCE_VDD;
> -
> - pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> - pp_stat_reg = _pp_stat_reg(intel_dp);
> -
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> -
> - /* Make sure sequencer is idle before allowing subsequent activity */
> - drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> - intel_de_read(dev_priv, pp_stat_reg),
> - intel_de_read(dev_priv, pp_ctrl_reg));
> -
> - if ((pp & PANEL_POWER_ON) == 0)
> - intel_dp->panel_power_off_time = ktime_get_boottime();
> -
> - intel_display_power_put(dev_priv,
> - intel_aux_power_domain(dig_port),
> - fetch_and_zero(&intel_dp->vdd_wakeref));
> -}
> -
> -static void edp_panel_vdd_work(struct work_struct *__work)
> -{
> - struct intel_dp *intel_dp =
> - container_of(to_delayed_work(__work),
> - struct intel_dp, panel_vdd_work);
> - intel_wakeref_t wakeref;
> -
> - with_pps_lock(intel_dp, wakeref) {
> - if (!intel_dp->want_panel_vdd)
> - edp_panel_vdd_off_sync(intel_dp);
> - }
> -}
> -
> -static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
> -{
> - unsigned long delay;
> -
> - /*
> - * Queue the timer to fire a long time from now (relative to the power
> - * down delay) to keep the panel power up across a sequence of
> - * operations.
> - */
> - delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
> - schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
> -}
> -
> -/*
> - * Must be paired with edp_panel_vdd_on().
> - * Must hold pps_mutex around the whole on/off sequence.
> - * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
> - */
> -static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - I915_STATE_WARN(!intel_dp->want_panel_vdd, "[ENCODER:%d:%s] VDD not forced on",
> - dp_to_dig_port(intel_dp)->base.base.base.id,
> - dp_to_dig_port(intel_dp)->base.base.name);
> -
> - intel_dp->want_panel_vdd = false;
> -
> - if (sync)
> - edp_panel_vdd_off_sync(intel_dp);
> - else
> - edp_panel_vdd_schedule_off(intel_dp);
> -}
> -
> -static void edp_panel_on(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - u32 pp;
> - i915_reg_t pp_ctrl_reg;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power on\n",
> - dp_to_dig_port(intel_dp)->base.base.base.id,
> - dp_to_dig_port(intel_dp)->base.base.name);
> -
> - if (drm_WARN(&dev_priv->drm, edp_have_panel_power(intel_dp),
> - "[ENCODER:%d:%s] panel power already on\n",
> - dp_to_dig_port(intel_dp)->base.base.base.id,
> - dp_to_dig_port(intel_dp)->base.base.name))
> - return;
> -
> - wait_panel_power_cycle(intel_dp);
> -
> - pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> - pp = ilk_get_pp_control(intel_dp);
> - if (IS_GEN(dev_priv, 5)) {
> - /* ILK workaround: disable reset around power sequence */
> - pp &= ~PANEL_POWER_RESET;
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> - }
> -
> - pp |= PANEL_POWER_ON;
> - if (!IS_GEN(dev_priv, 5))
> - pp |= PANEL_POWER_RESET;
> -
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> -
> - wait_panel_on(intel_dp);
> - intel_dp->last_power_on = jiffies;
> -
> - if (IS_GEN(dev_priv, 5)) {
> - pp |= PANEL_POWER_RESET; /* restore panel reset bit */
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> - }
> -}
> -
> -void intel_edp_panel_on(struct intel_dp *intel_dp)
> -{
> - intel_wakeref_t wakeref;
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - with_pps_lock(intel_dp, wakeref)
> - edp_panel_on(intel_dp);
> -}
> -
> -
> -static void edp_panel_off(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - u32 pp;
> - i915_reg_t pp_ctrl_reg;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power off\n",
> - dig_port->base.base.base.id, dig_port->base.base.name);
> -
> - drm_WARN(&dev_priv->drm, !intel_dp->want_panel_vdd,
> - "Need [ENCODER:%d:%s] VDD to turn off panel\n",
> - dig_port->base.base.base.id, dig_port->base.base.name);
> -
> - pp = ilk_get_pp_control(intel_dp);
> - /* We need to switch off panel power _and_ force vdd, for otherwise some
> - * panels get very unhappy and cease to work. */
> - pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
> - EDP_BLC_ENABLE);
> -
> - pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> -
> - intel_dp->want_panel_vdd = false;
> + *
> + * CPT PCH is quite different, having many bits moved
> + * to the TRANS_DP_CTL register instead. That
> + * configuration happens (oddly) in ilk_pch_enable
> + */
>
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + /* Preserve the BIOS-computed detected bit. This is
> + * supposed to be read-only.
> + */
> + intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
>
> - wait_panel_off(intel_dp);
> - intel_dp->panel_power_off_time = ktime_get_boottime();
> + /* Handle DP bits in common between all three register formats */
> + intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
> + intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
>
> - /* We got a reference when we enabled the VDD. */
> - intel_display_power_put(dev_priv,
> - intel_aux_power_domain(dig_port),
> - fetch_and_zero(&intel_dp->vdd_wakeref));
> -}
> + /* Split out the IBX/CPU vs CPT settings */
>
> -void intel_edp_panel_off(struct intel_dp *intel_dp)
> -{
> - intel_wakeref_t wakeref;
> + if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
> + if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
> + intel_dp->DP |= DP_SYNC_HS_HIGH;
> + if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
> + intel_dp->DP |= DP_SYNC_VS_HIGH;
> + intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
>
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> + if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> + intel_dp->DP |= DP_ENHANCED_FRAMING;
>
> - with_pps_lock(intel_dp, wakeref)
> - edp_panel_off(intel_dp);
> -}
> + intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
> + } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
> + u32 trans_dp;
>
> -/* Enable backlight in the panel power control. */
> -static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - intel_wakeref_t wakeref;
> + intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
>
> - /*
> - * If we enable the backlight right away following a panel power
> - * on, we may see slight flicker as the panel syncs with the eDP
> - * link. So delay a bit to make sure the image is solid before
> - * allowing it to appear.
> - */
> - wait_backlight_on(intel_dp);
> + trans_dp = intel_de_read(dev_priv, TRANS_DP_CTL(crtc->pipe));
> + if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> + trans_dp |= TRANS_DP_ENH_FRAMING;
> + else
> + trans_dp &= ~TRANS_DP_ENH_FRAMING;
> + intel_de_write(dev_priv, TRANS_DP_CTL(crtc->pipe), trans_dp);
> + } else {
> + if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
> + intel_dp->DP |= DP_COLOR_RANGE_16_235;
>
> - with_pps_lock(intel_dp, wakeref) {
> - i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> - u32 pp;
> + if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
> + intel_dp->DP |= DP_SYNC_HS_HIGH;
> + if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
> + intel_dp->DP |= DP_SYNC_VS_HIGH;
> + intel_dp->DP |= DP_LINK_TRAIN_OFF;
>
> - pp = ilk_get_pp_control(intel_dp);
> - pp |= EDP_BLC_ENABLE;
> + if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
> + intel_dp->DP |= DP_ENHANCED_FRAMING;
>
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + if (IS_CHERRYVIEW(dev_priv))
> + intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe);
> + else
> + intel_dp->DP |= DP_PIPE_SEL(crtc->pipe);
> }
> }
>
> +
> /* Enable backlight PWM and backlight PP control. */
> void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state)
> @@ -3432,30 +2566,6 @@ void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
> _intel_edp_backlight_on(intel_dp);
> }
>
> -/* Disable backlight in the panel power control. */
> -static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - intel_wakeref_t wakeref;
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - with_pps_lock(intel_dp, wakeref) {
> - i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> - u32 pp;
> -
> - pp = ilk_get_pp_control(intel_dp);
> - pp &= ~EDP_BLC_ENABLE;
> -
> - intel_de_write(dev_priv, pp_ctrl_reg, pp);
> - intel_de_posting_read(dev_priv, pp_ctrl_reg);
> - }
> -
> - intel_dp->last_backlight_off = jiffies;
> - edp_wait_backlight_off(intel_dp);
> -}
> -
> /* Disable backlight PP control and backlight PWM. */
> void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
> {
> @@ -3471,33 +2581,6 @@ void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
> intel_panel_disable_backlight(old_conn_state);
> }
>
> -/*
> - * Hook for controlling the panel power control backlight through the bl_power
> - * sysfs attribute. Take care to handle multiple calls.
> - */
> -static void intel_edp_backlight_power(struct intel_connector *connector,
> - bool enable)
> -{
> - struct drm_i915_private *i915 = to_i915(connector->base.dev);
> - struct intel_dp *intel_dp = intel_attached_dp(connector);
> - intel_wakeref_t wakeref;
> - bool is_enabled;
> -
> - is_enabled = false;
> - with_pps_lock(intel_dp, wakeref)
> - is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
> - if (is_enabled == enable)
> - return;
> -
> - drm_dbg_kms(&i915->drm, "panel power control backlight %s\n",
> - enable ? "enable" : "disable");
> -
> - if (enable)
> - _intel_edp_backlight_on(intel_dp);
> - else
> - _intel_edp_backlight_off(intel_dp);
> -}
> -
> static void assert_dp_port(struct intel_dp *intel_dp, bool state)
> {
> struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> @@ -4498,112 +3581,6 @@ static void g4x_pre_enable_dp(struct intel_atomic_state *state,
> ilk_edp_pll_on(intel_dp, pipe_config);
> }
>
> -static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
> -{
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> - struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
> - enum pipe pipe = intel_dp->pps_pipe;
> - i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
> -
> - drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
> -
> - if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B))
> - return;
> -
> - edp_panel_vdd_off_sync(intel_dp);
> -
> - /*
> - * VLV seems to get confused when multiple power sequencers
> - * have the same port selected (even if only one has power/vdd
> - * enabled). The failure manifests as vlv_wait_port_ready() failing
> - * CHV on the other hand doesn't seem to mind having the same port
> - * selected in multiple power sequencers, but let's clear the
> - * port select always when logically disconnecting a power sequencer
> - * from a port.
> - */
> - drm_dbg_kms(&dev_priv->drm,
> - "detaching pipe %c power sequencer from [ENCODER:%d:%s]\n",
> - pipe_name(pipe), dig_port->base.base.base.id,
> - dig_port->base.base.name);
> - intel_de_write(dev_priv, pp_on_reg, 0);
> - intel_de_posting_read(dev_priv, pp_on_reg);
> -
> - intel_dp->pps_pipe = INVALID_PIPE;
> -}
> -
> -static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
> - enum pipe pipe)
> -{
> - struct intel_encoder *encoder;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - for_each_intel_dp(&dev_priv->drm, encoder) {
> - struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> -
> - drm_WARN(&dev_priv->drm, intel_dp->active_pipe == pipe,
> - "stealing pipe %c power sequencer from active [ENCODER:%d:%s]\n",
> - pipe_name(pipe), encoder->base.base.id,
> - encoder->base.name);
> -
> - if (intel_dp->pps_pipe != pipe)
> - continue;
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "stealing pipe %c power sequencer from [ENCODER:%d:%s]\n",
> - pipe_name(pipe), encoder->base.base.id,
> - encoder->base.name);
> -
> - /* make sure vdd is off before we steal it */
> - vlv_detach_power_sequencer(intel_dp);
> - }
> -}
> -
> -static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
> - const struct intel_crtc_state *crtc_state)
> -{
> - struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> - struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> - struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
> -
> - if (intel_dp->pps_pipe != INVALID_PIPE &&
> - intel_dp->pps_pipe != crtc->pipe) {
> - /*
> - * If another power sequencer was being used on this
> - * port previously make sure to turn off vdd there while
> - * we still have control of it.
> - */
> - vlv_detach_power_sequencer(intel_dp);
> - }
> -
> - /*
> - * We may be stealing the power
> - * sequencer from another port.
> - */
> - vlv_steal_power_sequencer(dev_priv, crtc->pipe);
> -
> - intel_dp->active_pipe = crtc->pipe;
> -
> - if (!intel_dp_is_edp(intel_dp))
> - return;
> -
> - /* now it's all ours */
> - intel_dp->pps_pipe = crtc->pipe;
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "initializing pipe %c power sequencer for [ENCODER:%d:%s]\n",
> - pipe_name(intel_dp->pps_pipe), encoder->base.base.id,
> - encoder->base.name);
> -
> - /* init power sequencer on this pipe and port */
> - intel_dp_init_panel_power_sequencer(intel_dp);
> - intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
> -}
> -
> static void vlv_pre_enable_dp(struct intel_atomic_state *state,
> struct intel_encoder *encoder,
> const struct intel_crtc_state *pipe_config,
> @@ -7324,31 +6301,6 @@ void intel_dp_encoder_shutdown(struct intel_encoder *intel_encoder)
> wait_panel_power_cycle(intel_dp);
> }
>
> -static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - if (!edp_have_panel_vdd(intel_dp))
> - return;
> -
> - /*
> - * The VDD bit needs a power domain reference, so if the bit is
> - * already enabled when we boot or resume, grab this reference and
> - * schedule a vdd off, so we don't hold on to the reference
> - * indefinitely.
> - */
> - drm_dbg_kms(&dev_priv->drm,
> - "VDD left on by BIOS, adjusting state tracking\n");
> - drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
> - intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
> - intel_aux_power_domain(dig_port));
> -
> - edp_panel_vdd_schedule_off(intel_dp);
> -}
> -
> static enum pipe vlv_active_pipe(struct intel_dp *intel_dp)
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> @@ -7554,19 +6506,6 @@ static const struct drm_encoder_funcs intel_dp_enc_funcs = {
> .destroy = intel_dp_encoder_destroy,
> };
>
> -static bool intel_edp_have_power(struct intel_dp *intel_dp)
> -{
> - intel_wakeref_t wakeref;
> - bool have_power = false;
> -
> - with_pps_lock(intel_dp, wakeref) {
> - have_power = edp_have_panel_power(intel_dp) &&
> - edp_have_panel_vdd(intel_dp);
> - }
> -
> - return have_power;
> -}
> -
> enum irqreturn
> intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd)
> {
> @@ -7670,277 +6609,6 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
> }
> }
>
> -static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> -{
> - intel_dp->panel_power_off_time = ktime_get_boottime();
> - intel_dp->last_power_on = jiffies;
> - intel_dp->last_backlight_off = jiffies;
> -}
> -
> -static void
> -intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - u32 pp_on, pp_off, pp_ctl;
> - struct pps_registers regs;
> -
> - intel_pps_get_registers(intel_dp, ®s);
> -
> - pp_ctl = ilk_get_pp_control(intel_dp);
> -
> - /* Ensure PPS is unlocked */
> - if (!HAS_DDI(dev_priv))
> - intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
> -
> - pp_on = intel_de_read(dev_priv, regs.pp_on);
> - pp_off = intel_de_read(dev_priv, regs.pp_off);
> -
> - /* Pull timing values out of registers */
> - seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
> - seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
> - seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
> - seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
> -
> - if (i915_mmio_reg_valid(regs.pp_div)) {
> - u32 pp_div;
> -
> - pp_div = intel_de_read(dev_priv, regs.pp_div);
> -
> - seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
> - } else {
> - seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
> - }
> -}
> -
> -static void
> -intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
> -{
> - DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
> - state_name,
> - seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
> -}
> -
> -static void
> -intel_pps_verify_state(struct intel_dp *intel_dp)
> -{
> - struct edp_power_seq hw;
> - struct edp_power_seq *sw = &intel_dp->pps_delays;
> -
> - intel_pps_readout_hw_state(intel_dp, &hw);
> -
> - if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
> - hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
> - DRM_ERROR("PPS state mismatch\n");
> - intel_pps_dump_state("sw", sw);
> - intel_pps_dump_state("hw", &hw);
> - }
> -}
> -
> -static void
> -intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct edp_power_seq cur, vbt, spec,
> - *final = &intel_dp->pps_delays;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - /* already initialized? */
> - if (final->t11_t12 != 0)
> - return;
> -
> - intel_pps_readout_hw_state(intel_dp, &cur);
> -
> - intel_pps_dump_state("cur", &cur);
> -
> - vbt = dev_priv->vbt.edp.pps;
> - /* On Toshiba Satellite P50-C-18C system the VBT T12 delay
> - * of 500ms appears to be too short. Ocassionally the panel
> - * just fails to power back on. Increasing the delay to 800ms
> - * seems sufficient to avoid this problem.
> - */
> - if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
> - vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
> - drm_dbg_kms(&dev_priv->drm,
> - "Increasing T12 panel delay as per the quirk to %d\n",
> - vbt.t11_t12);
> - }
> - /* T11_T12 delay is special and actually in units of 100ms, but zero
> - * based in the hw (so we need to add 100 ms). But the sw vbt
> - * table multiplies it with 1000 to make it in units of 100usec,
> - * too. */
> - vbt.t11_t12 += 100 * 10;
> -
> - /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
> - * our hw here, which are all in 100usec. */
> - spec.t1_t3 = 210 * 10;
> - spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
> - spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
> - spec.t10 = 500 * 10;
> - /* This one is special and actually in units of 100ms, but zero
> - * based in the hw (so we need to add 100 ms). But the sw vbt
> - * table multiplies it with 1000 to make it in units of 100usec,
> - * too. */
> - spec.t11_t12 = (510 + 100) * 10;
> -
> - intel_pps_dump_state("vbt", &vbt);
> -
> - /* Use the max of the register settings and vbt. If both are
> - * unset, fall back to the spec limits. */
> -#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
> - spec.field : \
> - max(cur.field, vbt.field))
> - assign_final(t1_t3);
> - assign_final(t8);
> - assign_final(t9);
> - assign_final(t10);
> - assign_final(t11_t12);
> -#undef assign_final
> -
> -#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
> - intel_dp->panel_power_up_delay = get_delay(t1_t3);
> - intel_dp->backlight_on_delay = get_delay(t8);
> - intel_dp->backlight_off_delay = get_delay(t9);
> - intel_dp->panel_power_down_delay = get_delay(t10);
> - intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
> -#undef get_delay
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "panel power up delay %d, power down delay %d, power cycle delay %d\n",
> - intel_dp->panel_power_up_delay,
> - intel_dp->panel_power_down_delay,
> - intel_dp->panel_power_cycle_delay);
> -
> - drm_dbg_kms(&dev_priv->drm, "backlight on delay %d, off delay %d\n",
> - intel_dp->backlight_on_delay,
> - intel_dp->backlight_off_delay);
> -
> - /*
> - * We override the HW backlight delays to 1 because we do manual waits
> - * on them. For T8, even BSpec recommends doing it. For T9, if we
> - * don't do this, we'll end up waiting for the backlight off delay
> - * twice: once when we do the manual sleep, and once when we disable
> - * the panel and wait for the PP_STATUS bit to become zero.
> - */
> - final->t8 = 1;
> - final->t9 = 1;
> -
> - /*
> - * HW has only a 100msec granularity for t11_t12 so round it up
> - * accordingly.
> - */
> - final->t11_t12 = roundup(final->t11_t12, 100 * 10);
> -}
> -
> -static void
> -intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
> - bool force_disable_vdd)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - u32 pp_on, pp_off, port_sel = 0;
> - int div = RUNTIME_INFO(dev_priv)->rawclk_freq / 1000;
> - struct pps_registers regs;
> - enum port port = dp_to_dig_port(intel_dp)->base.port;
> - const struct edp_power_seq *seq = &intel_dp->pps_delays;
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> - intel_pps_get_registers(intel_dp, ®s);
> -
> - /*
> - * On some VLV machines the BIOS can leave the VDD
> - * enabled even on power sequencers which aren't
> - * hooked up to any port. This would mess up the
> - * power domain tracking the first time we pick
> - * one of these power sequencers for use since
> - * edp_panel_vdd_on() would notice that the VDD was
> - * already on and therefore wouldn't grab the power
> - * domain reference. Disable VDD first to avoid this.
> - * This also avoids spuriously turning the VDD on as
> - * soon as the new power sequencer gets initialized.
> - */
> - if (force_disable_vdd) {
> - u32 pp = ilk_get_pp_control(intel_dp);
> -
> - drm_WARN(&dev_priv->drm, pp & PANEL_POWER_ON,
> - "Panel power already on\n");
> -
> - if (pp & EDP_FORCE_VDD)
> - drm_dbg_kms(&dev_priv->drm,
> - "VDD already on, disabling first\n");
> -
> - pp &= ~EDP_FORCE_VDD;
> -
> - intel_de_write(dev_priv, regs.pp_ctrl, pp);
> - }
> -
> - pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
> - REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
> - pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
> - REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
> -
> - /* Haswell doesn't have any port selection bits for the panel
> - * power sequencer any more. */
> - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> - port_sel = PANEL_PORT_SELECT_VLV(port);
> - } else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
> - switch (port) {
> - case PORT_A:
> - port_sel = PANEL_PORT_SELECT_DPA;
> - break;
> - case PORT_C:
> - port_sel = PANEL_PORT_SELECT_DPC;
> - break;
> - case PORT_D:
> - port_sel = PANEL_PORT_SELECT_DPD;
> - break;
> - default:
> - MISSING_CASE(port);
> - break;
> - }
> - }
> -
> - pp_on |= port_sel;
> -
> - intel_de_write(dev_priv, regs.pp_on, pp_on);
> - intel_de_write(dev_priv, regs.pp_off, pp_off);
> -
> - /*
> - * Compute the divisor for the pp clock, simply match the Bspec formula.
> - */
> - if (i915_mmio_reg_valid(regs.pp_div)) {
> - intel_de_write(dev_priv, regs.pp_div,
> - REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
> - } else {
> - u32 pp_ctl;
> -
> - pp_ctl = intel_de_read(dev_priv, regs.pp_ctrl);
> - pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
> - pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
> - intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
> - }
> -
> - drm_dbg_kms(&dev_priv->drm,
> - "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
> - intel_de_read(dev_priv, regs.pp_on),
> - intel_de_read(dev_priv, regs.pp_off),
> - i915_mmio_reg_valid(regs.pp_div) ?
> - intel_de_read(dev_priv, regs.pp_div) :
> - (intel_de_read(dev_priv, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
> -}
> -
> -static void intel_dp_pps_init(struct intel_dp *intel_dp)
> -{
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> - vlv_initial_power_sequencer_setup(intel_dp);
> - } else {
> - intel_dp_init_panel_power_sequencer(intel_dp);
> - intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> - }
> -}
> -
> /**
> * intel_dp_set_drrs_state - program registers for RR switch to take effect
> * @dev_priv: i915 device
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
> index 4280a09fd8fd..d07bcdee9639 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
> @@ -70,15 +70,11 @@ enum irqreturn intel_dp_hpd_pulse(struct intel_digital_port *dig_port,
> void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state);
> void intel_edp_backlight_off(const struct drm_connector_state *conn_state);
> -void intel_edp_panel_vdd_on(struct intel_dp *intel_dp);
> -void intel_edp_panel_on(struct intel_dp *intel_dp);
> -void intel_edp_panel_off(struct intel_dp *intel_dp);
> void intel_dp_mst_suspend(struct drm_i915_private *dev_priv);
> void intel_dp_mst_resume(struct drm_i915_private *dev_priv);
> int intel_dp_max_link_rate(struct intel_dp *intel_dp);
> int intel_dp_max_lane_count(struct intel_dp *intel_dp);
> int intel_dp_rate_select(struct intel_dp *intel_dp, int rate);
> -void intel_power_sequencer_reset(struct drm_i915_private *dev_priv);
> u32 intel_dp_pack_aux(const u8 *src, int src_bytes);
>
> void intel_edp_drrs_enable(struct intel_dp *intel_dp,
> @@ -144,6 +140,7 @@ bool intel_dp_initial_fastset_check(struct intel_encoder *encoder,
> struct intel_crtc_state *crtc_state);
> void intel_dp_sync_state(struct intel_encoder *encoder,
> const struct intel_crtc_state *crtc_state);
> +const struct dpll *vlv_get_dpll(struct drm_i915_private *i915);
>
> void intel_dp_check_frl_training(struct intel_dp *intel_dp);
> void intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
> new file mode 100644
> index 000000000000..83bd83b3e3c4
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
> @@ -0,0 +1,1334 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#include "i915_drv.h"
> +#include "intel_display_types.h"
> +#include "intel_dp.h"
> +#include "intel_pps.h"
> +
> +static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
> + enum pipe pipe);
> +static void
> +intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp);
> +static void
> +intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
> + bool force_disable_vdd);
> +
> +intel_wakeref_t pps_lock(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + intel_wakeref_t wakeref;
> +
> + /*
> + * See intel_power_sequencer_reset() why we need
> + * a power domain reference here.
> + */
> + wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
> + mutex_lock(&dev_priv->pps_mutex);
> +
> + return wakeref;
> +}
> +
> +intel_wakeref_t pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + mutex_unlock(&dev_priv->pps_mutex);
> + intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
> +
> + return 0;
> +}
> +
> +static void
> +vlv_power_sequencer_kick(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + enum pipe pipe = intel_dp->pps_pipe;
> + bool pll_enabled, release_cl_override = false;
> + enum dpio_phy phy = DPIO_PHY(pipe);
> + enum dpio_channel ch = vlv_pipe_to_channel(pipe);
> + u32 DP;
> +
> + if (drm_WARN(&dev_priv->drm,
> + intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN,
> + "skipping pipe %c power sequencer kick due to [ENCODER:%d:%s] being active\n",
> + pipe_name(pipe), dig_port->base.base.base.id,
> + dig_port->base.base.name))
> + return;
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "kicking pipe %c power sequencer for [ENCODER:%d:%s]\n",
> + pipe_name(pipe), dig_port->base.base.base.id,
> + dig_port->base.base.name);
> +
> + /* Preserve the BIOS-computed detected bit. This is
> + * supposed to be read-only.
> + */
> + DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
> + DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
> + DP |= DP_PORT_WIDTH(1);
> + DP |= DP_LINK_TRAIN_PAT_1;
> +
> + if (IS_CHERRYVIEW(dev_priv))
> + DP |= DP_PIPE_SEL_CHV(pipe);
> + else
> + DP |= DP_PIPE_SEL(pipe);
> +
> + pll_enabled = intel_de_read(dev_priv, DPLL(pipe)) & DPLL_VCO_ENABLE;
> +
> + /*
> + * The DPLL for the pipe must be enabled for this to work.
> + * So enable temporarily it if it's not already enabled.
> + */
> + if (!pll_enabled) {
> + release_cl_override = IS_CHERRYVIEW(dev_priv) &&
> + !chv_phy_powergate_ch(dev_priv, phy, ch, true);
> +
> + if (vlv_force_pll_on(dev_priv, pipe, vlv_get_dpll(dev_priv))) {
> + drm_err(&dev_priv->drm,
> + "Failed to force on pll for pipe %c!\n",
> + pipe_name(pipe));
> + return;
> + }
> + }
> +
> + /*
> + * Similar magic as in intel_dp_enable_port().
> + * We _must_ do this port enable + disable trick
> + * to make this power sequencer lock onto the port.
> + * Otherwise even VDD force bit won't work.
> + */
> + intel_de_write(dev_priv, intel_dp->output_reg, DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, DP | DP_PORT_EN);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, DP & ~DP_PORT_EN);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +
> + if (!pll_enabled) {
> + vlv_force_pll_off(dev_priv, pipe);
> +
> + if (release_cl_override)
> + chv_phy_powergate_ch(dev_priv, phy, ch, false);
> + }
> +}
> +
> +static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
> +{
> + struct intel_encoder *encoder;
> + unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
> +
> + /*
> + * We don't have power sequencer currently.
> + * Pick one that's not used by other ports.
> + */
> + for_each_intel_dp(&dev_priv->drm, encoder) {
> + struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> +
> + if (encoder->type == INTEL_OUTPUT_EDP) {
> + drm_WARN_ON(&dev_priv->drm,
> + intel_dp->active_pipe != INVALID_PIPE &&
> + intel_dp->active_pipe !=
> + intel_dp->pps_pipe);
> +
> + if (intel_dp->pps_pipe != INVALID_PIPE)
> + pipes &= ~(1 << intel_dp->pps_pipe);
> + } else {
> + drm_WARN_ON(&dev_priv->drm,
> + intel_dp->pps_pipe != INVALID_PIPE);
> +
> + if (intel_dp->active_pipe != INVALID_PIPE)
> + pipes &= ~(1 << intel_dp->active_pipe);
> + }
> + }
> +
> + if (pipes == 0)
> + return INVALID_PIPE;
> +
> + return ffs(pipes) - 1;
> +}
> +
> +static enum pipe
> +vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + enum pipe pipe;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + /* We should never land here with regular DP ports */
> + drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> +
> + drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE &&
> + intel_dp->active_pipe != intel_dp->pps_pipe);
> +
> + if (intel_dp->pps_pipe != INVALID_PIPE)
> + return intel_dp->pps_pipe;
> +
> + pipe = vlv_find_free_pps(dev_priv);
> +
> + /*
> + * Didn't find one. This should not happen since there
> + * are two power sequencers and up to two eDP ports.
> + */
> + if (drm_WARN_ON(&dev_priv->drm, pipe == INVALID_PIPE))
> + pipe = PIPE_A;
> +
> + vlv_steal_power_sequencer(dev_priv, pipe);
> + intel_dp->pps_pipe = pipe;
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "picked pipe %c power sequencer for [ENCODER:%d:%s]\n",
> + pipe_name(intel_dp->pps_pipe),
> + dig_port->base.base.base.id,
> + dig_port->base.base.name);
> +
> + /* init power sequencer on this pipe and port */
> + intel_dp_init_panel_power_sequencer(intel_dp);
> + intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
> +
> + /*
> + * Even vdd force doesn't work until we've made
> + * the power sequencer lock in on the port.
> + */
> + vlv_power_sequencer_kick(intel_dp);
> +
> + return intel_dp->pps_pipe;
> +}
> +
> +static int
> +bxt_power_sequencer_idx(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + int backlight_controller = dev_priv->vbt.backlight.controller;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + /* We should never land here with regular DP ports */
> + drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> +
> + if (!intel_dp->pps_reset)
> + return backlight_controller;
> +
> + intel_dp->pps_reset = false;
> +
> + /*
> + * Only the HW needs to be reprogrammed, the SW state is fixed and
> + * has been setup during connector init.
> + */
> + intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> +
> + return backlight_controller;
> +}
> +
> +typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
> + enum pipe pipe);
> +
> +static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
> + enum pipe pipe)
> +{
> + return intel_de_read(dev_priv, PP_STATUS(pipe)) & PP_ON;
> +}
> +
> +static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
> + enum pipe pipe)
> +{
> + return intel_de_read(dev_priv, PP_CONTROL(pipe)) & EDP_FORCE_VDD;
> +}
> +
> +static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
> + enum pipe pipe)
> +{
> + return true;
> +}
> +
> +static enum pipe
> +vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
> + enum port port,
> + vlv_pipe_check pipe_check)
> +{
> + enum pipe pipe;
> +
> + for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
> + u32 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(pipe)) &
> + PANEL_PORT_SELECT_MASK;
> +
> + if (port_sel != PANEL_PORT_SELECT_VLV(port))
> + continue;
> +
> + if (!pipe_check(dev_priv, pipe))
> + continue;
> +
> + return pipe;
> + }
> +
> + return INVALID_PIPE;
> +}
> +
> +static void
> +vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + enum port port = dig_port->base.port;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + /* try to find a pipe with this port selected */
> + /* first pick one where the panel is on */
> + intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> + vlv_pipe_has_pp_on);
> + /* didn't find one? pick one where vdd is on */
> + if (intel_dp->pps_pipe == INVALID_PIPE)
> + intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> + vlv_pipe_has_vdd_on);
> + /* didn't find one? pick one with just the correct port */
> + if (intel_dp->pps_pipe == INVALID_PIPE)
> + intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
> + vlv_pipe_any);
> +
> + /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
> + if (intel_dp->pps_pipe == INVALID_PIPE) {
> + drm_dbg_kms(&dev_priv->drm,
> + "no initial power sequencer for [ENCODER:%d:%s]\n",
> + dig_port->base.base.base.id,
> + dig_port->base.base.name);
> + return;
> + }
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "initial power sequencer for [ENCODER:%d:%s]: pipe %c\n",
> + dig_port->base.base.base.id,
> + dig_port->base.base.name,
> + pipe_name(intel_dp->pps_pipe));
> +
> + intel_dp_init_panel_power_sequencer(intel_dp);
> + intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> +}
> +
> +void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
> +{
> + struct intel_encoder *encoder;
> +
> + if (drm_WARN_ON(&dev_priv->drm,
> + !(IS_VALLEYVIEW(dev_priv) ||
> + IS_CHERRYVIEW(dev_priv) ||
> + IS_GEN9_LP(dev_priv))))
> + return;
> +
> + /*
> + * We can't grab pps_mutex here due to deadlock with power_domain
> + * mutex when power_domain functions are called while holding pps_mutex.
> + * That also means that in order to use pps_pipe the code needs to
> + * hold both a power domain reference and pps_mutex, and the power domain
> + * reference get/put must be done while _not_ holding pps_mutex.
> + * pps_{lock,unlock}() do these steps in the correct order, so one
> + * should use them always.
> + */
> +
> + for_each_intel_dp(&dev_priv->drm, encoder) {
> + struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> +
> + drm_WARN_ON(&dev_priv->drm,
> + intel_dp->active_pipe != INVALID_PIPE);
> +
> + if (encoder->type != INTEL_OUTPUT_EDP)
> + continue;
> +
> + if (IS_GEN9_LP(dev_priv))
> + intel_dp->pps_reset = true;
> + else
> + intel_dp->pps_pipe = INVALID_PIPE;
> + }
> +}
> +
> +struct pps_registers {
> + i915_reg_t pp_ctrl;
> + i915_reg_t pp_stat;
> + i915_reg_t pp_on;
> + i915_reg_t pp_off;
> + i915_reg_t pp_div;
> +};
> +
> +static void intel_pps_get_registers(struct intel_dp *intel_dp,
> + struct pps_registers *regs)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + int pps_idx = 0;
> +
> + memset(regs, 0, sizeof(*regs));
> +
> + if (IS_GEN9_LP(dev_priv))
> + pps_idx = bxt_power_sequencer_idx(intel_dp);
> + else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> + pps_idx = vlv_power_sequencer_pipe(intel_dp);
> +
> + regs->pp_ctrl = PP_CONTROL(pps_idx);
> + regs->pp_stat = PP_STATUS(pps_idx);
> + regs->pp_on = PP_ON_DELAYS(pps_idx);
> + regs->pp_off = PP_OFF_DELAYS(pps_idx);
> +
> + /* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
> + if (IS_GEN9_LP(dev_priv) || INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
> + regs->pp_div = INVALID_MMIO_REG;
> + else
> + regs->pp_div = PP_DIVISOR(pps_idx);
> +}
> +
> +static i915_reg_t
> +_pp_ctrl_reg(struct intel_dp *intel_dp)
> +{
> + struct pps_registers regs;
> +
> + intel_pps_get_registers(intel_dp, ®s);
> +
> + return regs.pp_ctrl;
> +}
> +
> +static i915_reg_t
> +_pp_stat_reg(struct intel_dp *intel_dp)
> +{
> + struct pps_registers regs;
> +
> + intel_pps_get_registers(intel_dp, ®s);
> +
> + return regs.pp_stat;
> +}
> +
> +static bool edp_have_panel_power(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> + intel_dp->pps_pipe == INVALID_PIPE)
> + return false;
> +
> + return (intel_de_read(dev_priv, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
> +}
> +
> +static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> + intel_dp->pps_pipe == INVALID_PIPE)
> + return false;
> +
> + return intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
> +}
> +
> +void intel_dp_check_edp(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
> + drm_WARN(&dev_priv->drm, 1,
> + "eDP powered off while attempting aux channel communication.\n");
> + drm_dbg_kms(&dev_priv->drm, "Status 0x%08x Control 0x%08x\n",
> + intel_de_read(dev_priv, _pp_stat_reg(intel_dp)),
> + intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)));
> + }
> +}
> +
> +#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
> +#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
> +
> +#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
> +#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
> +
> +#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
> +#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
> +
> +static void intel_pps_verify_state(struct intel_dp *intel_dp);
> +
> +static void wait_panel_status(struct intel_dp *intel_dp,
> + u32 mask,
> + u32 value)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + i915_reg_t pp_stat_reg, pp_ctrl_reg;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + intel_pps_verify_state(intel_dp);
> +
> + pp_stat_reg = _pp_stat_reg(intel_dp);
> + pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "mask %08x value %08x status %08x control %08x\n",
> + mask, value,
> + intel_de_read(dev_priv, pp_stat_reg),
> + intel_de_read(dev_priv, pp_ctrl_reg));
> +
> + if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
> + mask, value, 5000))
> + drm_err(&dev_priv->drm,
> + "Panel status timeout: status %08x control %08x\n",
> + intel_de_read(dev_priv, pp_stat_reg),
> + intel_de_read(dev_priv, pp_ctrl_reg));
> +
> + drm_dbg_kms(&dev_priv->drm, "Wait complete\n");
> +}
> +
> +static void wait_panel_on(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> +
> + drm_dbg_kms(&i915->drm, "Wait for panel power on\n");
> + wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
> +}
> +
> +static void wait_panel_off(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> +
> + drm_dbg_kms(&i915->drm, "Wait for panel power off time\n");
> + wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
> +}
> +
> +void wait_panel_power_cycle(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + ktime_t panel_power_on_time;
> + s64 panel_power_off_duration;
> +
> + drm_dbg_kms(&i915->drm, "Wait for panel power cycle\n");
> +
> + /* take the difference of currrent time and panel power off time
> + * and then make panel wait for t11_t12 if needed. */
> + panel_power_on_time = ktime_get_boottime();
> + panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
> +
> + /* When we disable the VDD override bit last we have to do the manual
> + * wait. */
> + if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
> + wait_remaining_ms_from_jiffies(jiffies,
> + intel_dp->panel_power_cycle_delay - panel_power_off_duration);
> +
> + wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
> +}
> +
> +static void wait_backlight_on(struct intel_dp *intel_dp)
> +{
> + wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
> + intel_dp->backlight_on_delay);
> +}
> +
> +static void edp_wait_backlight_off(struct intel_dp *intel_dp)
> +{
> + wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
> + intel_dp->backlight_off_delay);
> +}
> +
> +/* Read the current pp_control value, unlocking the register if it
> + * is locked
> + */
> +
> +static u32 ilk_get_pp_control(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u32 control;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
> + if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
> + (control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
> + control &= ~PANEL_UNLOCK_MASK;
> + control |= PANEL_UNLOCK_REGS;
> + }
> + return control;
> +}
> +
> +/*
> + * Must be paired with edp_panel_vdd_off().
> + * Must hold pps_mutex around the whole on/off sequence.
> + * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
> + */
> +bool edp_panel_vdd_on(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + u32 pp;
> + i915_reg_t pp_stat_reg, pp_ctrl_reg;
> + bool need_to_disable = !intel_dp->want_panel_vdd;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return false;
> +
> + cancel_delayed_work(&intel_dp->panel_vdd_work);
> + intel_dp->want_panel_vdd = true;
> +
> + if (edp_have_panel_vdd(intel_dp))
> + return need_to_disable;
> +
> + drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
> + intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
> + intel_aux_power_domain(dig_port));
> +
> + drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD on\n",
> + dig_port->base.base.base.id,
> + dig_port->base.base.name);
> +
> + if (!edp_have_panel_power(intel_dp))
> + wait_panel_power_cycle(intel_dp);
> +
> + pp = ilk_get_pp_control(intel_dp);
> + pp |= EDP_FORCE_VDD;
> +
> + pp_stat_reg = _pp_stat_reg(intel_dp);
> + pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> + intel_de_read(dev_priv, pp_stat_reg),
> + intel_de_read(dev_priv, pp_ctrl_reg));
> + /*
> + * If the panel wasn't on, delay before accessing aux channel
> + */
> + if (!edp_have_panel_power(intel_dp)) {
> + drm_dbg_kms(&dev_priv->drm,
> + "[ENCODER:%d:%s] panel power wasn't enabled\n",
> + dig_port->base.base.base.id,
> + dig_port->base.base.name);
> + msleep(intel_dp->panel_power_up_delay);
> + }
> +
> + return need_to_disable;
> +}
> +
> +/*
> + * Must be paired with intel_edp_panel_vdd_off() or
> + * intel_edp_panel_off().
> + * Nested calls to these functions are not allowed since
> + * we drop the lock. Caller must use some higher level
> + * locking to prevent nested calls from other threads.
> + */
> +void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
> +{
> + intel_wakeref_t wakeref;
> + bool vdd;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + vdd = false;
> + with_pps_lock(intel_dp, wakeref)
> + vdd = edp_panel_vdd_on(intel_dp);
> + I915_STATE_WARN(!vdd, "[ENCODER:%d:%s] VDD already requested on\n",
> + dp_to_dig_port(intel_dp)->base.base.base.id,
> + dp_to_dig_port(intel_dp)->base.base.name);
> +}
> +
> +void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port =
> + dp_to_dig_port(intel_dp);
> + u32 pp;
> + i915_reg_t pp_stat_reg, pp_ctrl_reg;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + drm_WARN_ON(&dev_priv->drm, intel_dp->want_panel_vdd);
> +
> + if (!edp_have_panel_vdd(intel_dp))
> + return;
> +
> + drm_dbg_kms(&dev_priv->drm, "Turning [ENCODER:%d:%s] VDD off\n",
> + dig_port->base.base.base.id,
> + dig_port->base.base.name);
> +
> + pp = ilk_get_pp_control(intel_dp);
> + pp &= ~EDP_FORCE_VDD;
> +
> + pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> + pp_stat_reg = _pp_stat_reg(intel_dp);
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> +
> + /* Make sure sequencer is idle before allowing subsequent activity */
> + drm_dbg_kms(&dev_priv->drm, "PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
> + intel_de_read(dev_priv, pp_stat_reg),
> + intel_de_read(dev_priv, pp_ctrl_reg));
> +
> + if ((pp & PANEL_POWER_ON) == 0)
> + intel_dp->panel_power_off_time = ktime_get_boottime();
> +
> + intel_display_power_put(dev_priv,
> + intel_aux_power_domain(dig_port),
> + fetch_and_zero(&intel_dp->vdd_wakeref));
> +}
> +
> +void edp_panel_vdd_work(struct work_struct *__work)
> +{
> + struct intel_dp *intel_dp =
> + container_of(to_delayed_work(__work),
> + struct intel_dp, panel_vdd_work);
> + intel_wakeref_t wakeref;
> +
> + with_pps_lock(intel_dp, wakeref) {
> + if (!intel_dp->want_panel_vdd)
> + edp_panel_vdd_off_sync(intel_dp);
> + }
> +}
> +
> +static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
> +{
> + unsigned long delay;
> +
> + /*
> + * Queue the timer to fire a long time from now (relative to the power
> + * down delay) to keep the panel power up across a sequence of
> + * operations.
> + */
> + delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
> + schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
> +}
> +
> +/*
> + * Must be paired with edp_panel_vdd_on().
> + * Must hold pps_mutex around the whole on/off sequence.
> + * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
> + */
> +void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + I915_STATE_WARN(!intel_dp->want_panel_vdd, "[ENCODER:%d:%s] VDD not forced on",
> + dp_to_dig_port(intel_dp)->base.base.base.id,
> + dp_to_dig_port(intel_dp)->base.base.name);
> +
> + intel_dp->want_panel_vdd = false;
> +
> + if (sync)
> + edp_panel_vdd_off_sync(intel_dp);
> + else
> + edp_panel_vdd_schedule_off(intel_dp);
> +}
> +
> +void edp_panel_on(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u32 pp;
> + i915_reg_t pp_ctrl_reg;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power on\n",
> + dp_to_dig_port(intel_dp)->base.base.base.id,
> + dp_to_dig_port(intel_dp)->base.base.name);
> +
> + if (drm_WARN(&dev_priv->drm, edp_have_panel_power(intel_dp),
> + "[ENCODER:%d:%s] panel power already on\n",
> + dp_to_dig_port(intel_dp)->base.base.base.id,
> + dp_to_dig_port(intel_dp)->base.base.name))
> + return;
> +
> + wait_panel_power_cycle(intel_dp);
> +
> + pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> + pp = ilk_get_pp_control(intel_dp);
> + if (IS_GEN(dev_priv, 5)) {
> + /* ILK workaround: disable reset around power sequence */
> + pp &= ~PANEL_POWER_RESET;
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + }
> +
> + pp |= PANEL_POWER_ON;
> + if (!IS_GEN(dev_priv, 5))
> + pp |= PANEL_POWER_RESET;
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> +
> + wait_panel_on(intel_dp);
> + intel_dp->last_power_on = jiffies;
> +
> + if (IS_GEN(dev_priv, 5)) {
> + pp |= PANEL_POWER_RESET; /* restore panel reset bit */
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + }
> +}
> +
> +void intel_edp_panel_on(struct intel_dp *intel_dp)
> +{
> + intel_wakeref_t wakeref;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + with_pps_lock(intel_dp, wakeref)
> + edp_panel_on(intel_dp);
> +}
> +
> +void edp_panel_off(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + u32 pp;
> + i915_reg_t pp_ctrl_reg;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + drm_dbg_kms(&dev_priv->drm, "Turn [ENCODER:%d:%s] panel power off\n",
> + dig_port->base.base.base.id, dig_port->base.base.name);
> +
> + drm_WARN(&dev_priv->drm, !intel_dp->want_panel_vdd,
> + "Need [ENCODER:%d:%s] VDD to turn off panel\n",
> + dig_port->base.base.base.id, dig_port->base.base.name);
> +
> + pp = ilk_get_pp_control(intel_dp);
> + /* We need to switch off panel power _and_ force vdd, for otherwise some
> + * panels get very unhappy and cease to work. */
> + pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
> + EDP_BLC_ENABLE);
> +
> + pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> +
> + intel_dp->want_panel_vdd = false;
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> +
> + wait_panel_off(intel_dp);
> + intel_dp->panel_power_off_time = ktime_get_boottime();
> +
> + /* We got a reference when we enabled the VDD. */
> + intel_display_power_put(dev_priv,
> + intel_aux_power_domain(dig_port),
> + fetch_and_zero(&intel_dp->vdd_wakeref));
> +}
> +
> +void intel_edp_panel_off(struct intel_dp *intel_dp)
> +{
> + intel_wakeref_t wakeref;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + with_pps_lock(intel_dp, wakeref)
> + edp_panel_off(intel_dp);
> +}
> +
> +/* Enable backlight in the panel power control. */
> +void _intel_edp_backlight_on(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + intel_wakeref_t wakeref;
> +
> + /*
> + * If we enable the backlight right away following a panel power
> + * on, we may see slight flicker as the panel syncs with the eDP
> + * link. So delay a bit to make sure the image is solid before
> + * allowing it to appear.
> + */
> + wait_backlight_on(intel_dp);
> +
> + with_pps_lock(intel_dp, wakeref) {
> + i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> + u32 pp;
> +
> + pp = ilk_get_pp_control(intel_dp);
> + pp |= EDP_BLC_ENABLE;
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + }
> +}
> +
> +/* Disable backlight in the panel power control. */
> +void _intel_edp_backlight_off(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + intel_wakeref_t wakeref;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + with_pps_lock(intel_dp, wakeref) {
> + i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
> + u32 pp;
> +
> + pp = ilk_get_pp_control(intel_dp);
> + pp &= ~EDP_BLC_ENABLE;
> +
> + intel_de_write(dev_priv, pp_ctrl_reg, pp);
> + intel_de_posting_read(dev_priv, pp_ctrl_reg);
> + }
> +
> + intel_dp->last_backlight_off = jiffies;
> + edp_wait_backlight_off(intel_dp);
> +}
> +
> +/*
> + * Hook for controlling the panel power control backlight through the bl_power
> + * sysfs attribute. Take care to handle multiple calls.
> + */
> +void intel_edp_backlight_power(struct intel_connector *connector, bool enable)
> +{
> + struct drm_i915_private *i915 = to_i915(connector->base.dev);
> + struct intel_dp *intel_dp = intel_attached_dp(connector);
> + intel_wakeref_t wakeref;
> + bool is_enabled;
> +
> + is_enabled = false;
> + with_pps_lock(intel_dp, wakeref)
> + is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
> + if (is_enabled == enable)
> + return;
> +
> + drm_dbg_kms(&i915->drm, "panel power control backlight %s\n",
> + enable ? "enable" : "disable");
> +
> + if (enable)
> + _intel_edp_backlight_on(intel_dp);
> + else
> + _intel_edp_backlight_off(intel_dp);
> +}
> +
> +static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
> +{
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
> + enum pipe pipe = intel_dp->pps_pipe;
> + i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
> +
> + drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
> +
> + if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B))
> + return;
> +
> + edp_panel_vdd_off_sync(intel_dp);
> +
> + /*
> + * VLV seems to get confused when multiple power sequencers
> + * have the same port selected (even if only one has power/vdd
> + * enabled). The failure manifests as vlv_wait_port_ready() failing
> + * CHV on the other hand doesn't seem to mind having the same port
> + * selected in multiple power sequencers, but let's clear the
> + * port select always when logically disconnecting a power sequencer
> + * from a port.
> + */
> + drm_dbg_kms(&dev_priv->drm,
> + "detaching pipe %c power sequencer from [ENCODER:%d:%s]\n",
> + pipe_name(pipe), dig_port->base.base.base.id,
> + dig_port->base.base.name);
> + intel_de_write(dev_priv, pp_on_reg, 0);
> + intel_de_posting_read(dev_priv, pp_on_reg);
> +
> + intel_dp->pps_pipe = INVALID_PIPE;
> +}
> +
> +static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
> + enum pipe pipe)
> +{
> + struct intel_encoder *encoder;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + for_each_intel_dp(&dev_priv->drm, encoder) {
> + struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> +
> + drm_WARN(&dev_priv->drm, intel_dp->active_pipe == pipe,
> + "stealing pipe %c power sequencer from active [ENCODER:%d:%s]\n",
> + pipe_name(pipe), encoder->base.base.id,
> + encoder->base.name);
> +
> + if (intel_dp->pps_pipe != pipe)
> + continue;
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "stealing pipe %c power sequencer from [ENCODER:%d:%s]\n",
> + pipe_name(pipe), encoder->base.base.id,
> + encoder->base.name);
> +
> + /* make sure vdd is off before we steal it */
> + vlv_detach_power_sequencer(intel_dp);
> + }
> +}
> +
> +void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + drm_WARN_ON(&dev_priv->drm, intel_dp->active_pipe != INVALID_PIPE);
> +
> + if (intel_dp->pps_pipe != INVALID_PIPE &&
> + intel_dp->pps_pipe != crtc->pipe) {
> + /*
> + * If another power sequencer was being used on this
> + * port previously make sure to turn off vdd there while
> + * we still have control of it.
> + */
> + vlv_detach_power_sequencer(intel_dp);
> + }
> +
> + /*
> + * We may be stealing the power
> + * sequencer from another port.
> + */
> + vlv_steal_power_sequencer(dev_priv, crtc->pipe);
> +
> + intel_dp->active_pipe = crtc->pipe;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + /* now it's all ours */
> + intel_dp->pps_pipe = crtc->pipe;
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "initializing pipe %c power sequencer for [ENCODER:%d:%s]\n",
> + pipe_name(intel_dp->pps_pipe), encoder->base.base.id,
> + encoder->base.name);
> +
> + /* init power sequencer on this pipe and port */
> + intel_dp_init_panel_power_sequencer(intel_dp);
> + intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
> +}
> +
> +void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + if (!edp_have_panel_vdd(intel_dp))
> + return;
> +
> + /*
> + * The VDD bit needs a power domain reference, so if the bit is
> + * already enabled when we boot or resume, grab this reference and
> + * schedule a vdd off, so we don't hold on to the reference
> + * indefinitely.
> + */
> + drm_dbg_kms(&dev_priv->drm,
> + "VDD left on by BIOS, adjusting state tracking\n");
> + drm_WARN_ON(&dev_priv->drm, intel_dp->vdd_wakeref);
> + intel_dp->vdd_wakeref = intel_display_power_get(dev_priv,
> + intel_aux_power_domain(dig_port));
> +
> + edp_panel_vdd_schedule_off(intel_dp);
> +}
> +
> +bool intel_edp_have_power(struct intel_dp *intel_dp)
> +{
> + intel_wakeref_t wakeref;
> + bool have_power = false;
> +
> + with_pps_lock(intel_dp, wakeref) {
> + have_power = edp_have_panel_power(intel_dp) &&
> + edp_have_panel_vdd(intel_dp);
> + }
> +
> + return have_power;
> +}
> +
> +void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> +{
> + intel_dp->panel_power_off_time = ktime_get_boottime();
> + intel_dp->last_power_on = jiffies;
> + intel_dp->last_backlight_off = jiffies;
> +}
> +
> +static void
> +intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u32 pp_on, pp_off, pp_ctl;
> + struct pps_registers regs;
> +
> + intel_pps_get_registers(intel_dp, ®s);
> +
> + pp_ctl = ilk_get_pp_control(intel_dp);
> +
> + /* Ensure PPS is unlocked */
> + if (!HAS_DDI(dev_priv))
> + intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
> +
> + pp_on = intel_de_read(dev_priv, regs.pp_on);
> + pp_off = intel_de_read(dev_priv, regs.pp_off);
> +
> + /* Pull timing values out of registers */
> + seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
> + seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
> + seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
> + seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
> +
> + if (i915_mmio_reg_valid(regs.pp_div)) {
> + u32 pp_div;
> +
> + pp_div = intel_de_read(dev_priv, regs.pp_div);
> +
> + seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
> + } else {
> + seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
> + }
> +}
> +
> +static void
> +intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
> +{
> + DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
> + state_name,
> + seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
> +}
> +
> +static void
> +intel_pps_verify_state(struct intel_dp *intel_dp)
> +{
> + struct edp_power_seq hw;
> + struct edp_power_seq *sw = &intel_dp->pps_delays;
> +
> + intel_pps_readout_hw_state(intel_dp, &hw);
> +
> + if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
> + hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
> + DRM_ERROR("PPS state mismatch\n");
> + intel_pps_dump_state("sw", sw);
> + intel_pps_dump_state("hw", &hw);
> + }
> +}
> +
> +static void
> +intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct edp_power_seq cur, vbt, spec,
> + *final = &intel_dp->pps_delays;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + /* already initialized? */
> + if (final->t11_t12 != 0)
> + return;
> +
> + intel_pps_readout_hw_state(intel_dp, &cur);
> +
> + intel_pps_dump_state("cur", &cur);
> +
> + vbt = dev_priv->vbt.edp.pps;
> + /* On Toshiba Satellite P50-C-18C system the VBT T12 delay
> + * of 500ms appears to be too short. Ocassionally the panel
> + * just fails to power back on. Increasing the delay to 800ms
> + * seems sufficient to avoid this problem.
> + */
> + if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
> + vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
> + drm_dbg_kms(&dev_priv->drm,
> + "Increasing T12 panel delay as per the quirk to %d\n",
> + vbt.t11_t12);
> + }
> + /* T11_T12 delay is special and actually in units of 100ms, but zero
> + * based in the hw (so we need to add 100 ms). But the sw vbt
> + * table multiplies it with 1000 to make it in units of 100usec,
> + * too. */
> + vbt.t11_t12 += 100 * 10;
> +
> + /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
> + * our hw here, which are all in 100usec. */
> + spec.t1_t3 = 210 * 10;
> + spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
> + spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
> + spec.t10 = 500 * 10;
> + /* This one is special and actually in units of 100ms, but zero
> + * based in the hw (so we need to add 100 ms). But the sw vbt
> + * table multiplies it with 1000 to make it in units of 100usec,
> + * too. */
> + spec.t11_t12 = (510 + 100) * 10;
> +
> + intel_pps_dump_state("vbt", &vbt);
> +
> + /* Use the max of the register settings and vbt. If both are
> + * unset, fall back to the spec limits. */
> +#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
> + spec.field : \
> + max(cur.field, vbt.field))
> + assign_final(t1_t3);
> + assign_final(t8);
> + assign_final(t9);
> + assign_final(t10);
> + assign_final(t11_t12);
> +#undef assign_final
> +
> +#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
> + intel_dp->panel_power_up_delay = get_delay(t1_t3);
> + intel_dp->backlight_on_delay = get_delay(t8);
> + intel_dp->backlight_off_delay = get_delay(t9);
> + intel_dp->panel_power_down_delay = get_delay(t10);
> + intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
> +#undef get_delay
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "panel power up delay %d, power down delay %d, power cycle delay %d\n",
> + intel_dp->panel_power_up_delay,
> + intel_dp->panel_power_down_delay,
> + intel_dp->panel_power_cycle_delay);
> +
> + drm_dbg_kms(&dev_priv->drm, "backlight on delay %d, off delay %d\n",
> + intel_dp->backlight_on_delay,
> + intel_dp->backlight_off_delay);
> +
> + /*
> + * We override the HW backlight delays to 1 because we do manual waits
> + * on them. For T8, even BSpec recommends doing it. For T9, if we
> + * don't do this, we'll end up waiting for the backlight off delay
> + * twice: once when we do the manual sleep, and once when we disable
> + * the panel and wait for the PP_STATUS bit to become zero.
> + */
> + final->t8 = 1;
> + final->t9 = 1;
> +
> + /*
> + * HW has only a 100msec granularity for t11_t12 so round it up
> + * accordingly.
> + */
> + final->t11_t12 = roundup(final->t11_t12, 100 * 10);
> +}
> +
> +static void
> +intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
> + bool force_disable_vdd)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u32 pp_on, pp_off, port_sel = 0;
> + int div = RUNTIME_INFO(dev_priv)->rawclk_freq / 1000;
> + struct pps_registers regs;
> + enum port port = dp_to_dig_port(intel_dp)->base.port;
> + const struct edp_power_seq *seq = &intel_dp->pps_delays;
> +
> + lockdep_assert_held(&dev_priv->pps_mutex);
> +
> + intel_pps_get_registers(intel_dp, ®s);
> +
> + /*
> + * On some VLV machines the BIOS can leave the VDD
> + * enabled even on power sequencers which aren't
> + * hooked up to any port. This would mess up the
> + * power domain tracking the first time we pick
> + * one of these power sequencers for use since
> + * edp_panel_vdd_on() would notice that the VDD was
> + * already on and therefore wouldn't grab the power
> + * domain reference. Disable VDD first to avoid this.
> + * This also avoids spuriously turning the VDD on as
> + * soon as the new power sequencer gets initialized.
> + */
> + if (force_disable_vdd) {
> + u32 pp = ilk_get_pp_control(intel_dp);
> +
> + drm_WARN(&dev_priv->drm, pp & PANEL_POWER_ON,
> + "Panel power already on\n");
> +
> + if (pp & EDP_FORCE_VDD)
> + drm_dbg_kms(&dev_priv->drm,
> + "VDD already on, disabling first\n");
> +
> + pp &= ~EDP_FORCE_VDD;
> +
> + intel_de_write(dev_priv, regs.pp_ctrl, pp);
> + }
> +
> + pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
> + REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
> + pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
> + REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
> +
> + /* Haswell doesn't have any port selection bits for the panel
> + * power sequencer any more. */
> + if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> + port_sel = PANEL_PORT_SELECT_VLV(port);
> + } else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
> + switch (port) {
> + case PORT_A:
> + port_sel = PANEL_PORT_SELECT_DPA;
> + break;
> + case PORT_C:
> + port_sel = PANEL_PORT_SELECT_DPC;
> + break;
> + case PORT_D:
> + port_sel = PANEL_PORT_SELECT_DPD;
> + break;
> + default:
> + MISSING_CASE(port);
> + break;
> + }
> + }
> +
> + pp_on |= port_sel;
> +
> + intel_de_write(dev_priv, regs.pp_on, pp_on);
> + intel_de_write(dev_priv, regs.pp_off, pp_off);
> +
> + /*
> + * Compute the divisor for the pp clock, simply match the Bspec formula.
> + */
> + if (i915_mmio_reg_valid(regs.pp_div)) {
> + intel_de_write(dev_priv, regs.pp_div,
> + REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
> + } else {
> + u32 pp_ctl;
> +
> + pp_ctl = intel_de_read(dev_priv, regs.pp_ctrl);
> + pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
> + pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
> + intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
> + }
> +
> + drm_dbg_kms(&dev_priv->drm,
> + "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
> + intel_de_read(dev_priv, regs.pp_on),
> + intel_de_read(dev_priv, regs.pp_off),
> + i915_mmio_reg_valid(regs.pp_div) ?
> + intel_de_read(dev_priv, regs.pp_div) :
> + (intel_de_read(dev_priv, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
> +}
> +
> +void intel_dp_pps_init(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> + vlv_initial_power_sequencer_setup(intel_dp);
> + } else {
> + intel_dp_init_panel_power_sequencer(intel_dp);
> + intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> + }
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.h b/drivers/gpu/drm/i915/display/intel_pps.h
> new file mode 100644
> index 000000000000..76d5cc565501
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_pps.h
> @@ -0,0 +1,53 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#ifndef __INTEL_PPS_H__
> +#define __INTEL_PPS_H__
> +
> +#include <linux/types.h>
> +
> +#include "intel_wakeref.h"
> +
> +struct drm_i915_private;
> +struct intel_connector;
> +struct intel_crtc_state;
> +struct intel_dp;
> +struct intel_encoder;
> +
> +intel_wakeref_t pps_lock(struct intel_dp *intel_dp);
> +intel_wakeref_t pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref);
> +
> +#define with_pps_lock(dp, wf) \
> + for ((wf) = pps_lock(dp); (wf); (wf) = pps_unlock((dp), (wf)))
> +
> +void intel_dp_check_edp(struct intel_dp *intel_dp);
> +void _intel_edp_backlight_on(struct intel_dp *intel_dp);
> +void _intel_edp_backlight_off(struct intel_dp *intel_dp);
> +void intel_edp_backlight_power(struct intel_connector *connector, bool enable);
> +
> +bool edp_panel_vdd_on(struct intel_dp *intel_dp);
> +void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
> +void edp_panel_vdd_off_sync(struct intel_dp *intel_dp);
> +void edp_panel_on(struct intel_dp *intel_dp);
> +void edp_panel_off(struct intel_dp *intel_dp);
> +void edp_panel_vdd_work(struct work_struct *__work);
> +
> +void intel_edp_panel_vdd_on(struct intel_dp *intel_dp);
> +void intel_edp_panel_on(struct intel_dp *intel_dp);
> +void intel_edp_panel_off(struct intel_dp *intel_dp);
> +bool intel_edp_have_power(struct intel_dp *intel_dp);
> +
> +void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp);
> +
> +void wait_panel_power_cycle(struct intel_dp *intel_dp);
> +
> +void intel_dp_pps_init(struct intel_dp *intel_dp);
> +void intel_power_sequencer_reset(struct drm_i915_private *i915);
> +void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp);
> +
> +void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state);
> +
> +#endif /* __INTEL_PPS_H__ */
--
Jani Nikula, Intel Open Source Graphics Center
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