[Intel-gfx] [PATCH v2 01/17] drm/i915/pps: abstract panel power sequencer from intel_dp.c
Anshuman Gupta
anshuman.gupta at intel.com
Wed Jan 13 16:47:17 UTC 2021
On 2021-01-08 at 19:44:09 +0200, Jani Nikula 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>
Looks Good to me.
Reviewed-by: Anshuman Gupta <anshuman.gupta 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__ */
> --
> 2.20.1
>
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