[Intel-gfx] [PATCH] drm/i915: Add Baytrail PSR Support.
Rodrigo Vivi
rodrigo.vivi at gmail.com
Wed Jan 29 16:47:00 CET 2014
On Wed, Jan 29, 2014 at 12:56 PM, Ville Syrjälä
<ville.syrjala at linux.intel.com> wrote:
> On Wed, Jan 29, 2014 at 10:47:54AM -0200, Rodrigo Vivi wrote:
>> This patch adds PSR Support to Baytrail.
>>
>> Baytrail cannot easily detect screen updates and force PSR exit.
>> So we inactivate it on {busy_ioctl, set_domain, sw_finish and mark_busy
>> and update to enable it back on next display mark_idle.
>>
>> v2: Also inactivate PSR on cursor update.
>> v3: Inactivate PSR on mark_busy, dset_domain and sw_finish_ioctl, and
>> early on page flip besides avoid initializing inactive/active flag
>> more than once.
>> v4: Fix identation issues.
>> v5: Rebase and add Baytrail per pipe support although leaving PIPE_B
>> support disabled by for now since it isn't working properly yet.
>> v6: Removing forgotten comment and useless clkgating definition.
>>
>> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
>> ---
>> drivers/gpu/drm/i915/i915_debugfs.c | 36 ++++++-
>> drivers/gpu/drm/i915/i915_drv.h | 4 +-
>> drivers/gpu/drm/i915/i915_gem.c | 9 ++
>> drivers/gpu/drm/i915/i915_reg.h | 37 +++++++
>> drivers/gpu/drm/i915/intel_display.c | 15 ++-
>> drivers/gpu/drm/i915/intel_dp.c | 204 +++++++++++++++++++++++++++++------
>> drivers/gpu/drm/i915/intel_drv.h | 1 +
>> 7 files changed, 267 insertions(+), 39 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
>> index 4b852c6..c28de65 100644
>> --- a/drivers/gpu/drm/i915/i915_debugfs.c
>> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
>> @@ -1900,6 +1900,8 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
>> struct drm_device *dev = node->minor->dev;
>> struct drm_i915_private *dev_priv = dev->dev_private;
>> u32 psrperf = 0;
>> + u32 statA = 0;
>> + u32 statB = 0;
>> bool enabled = false;
>>
>> intel_runtime_pm_get(dev_priv);
>> @@ -1907,14 +1909,38 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
>> seq_printf(m, "Sink_Support: %s\n", yesno(dev_priv->psr.sink_support));
>> seq_printf(m, "Source_OK: %s\n", yesno(dev_priv->psr.source_ok));
>>
>> - enabled = HAS_PSR(dev) &&
>> - I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE;
>> - seq_printf(m, "Enabled: %s\n", yesno(enabled));
>> + if (HAS_PSR(dev)) {
>> + if (IS_VALLEYVIEW(dev)) {
>> + statA = I915_READ(VLV_EDP_PSR_STATUS_CTL(PIPE_A)) &
>> + VLV_EDP_PSR_CURR_STATE_MASK;
>> + statB = I915_READ(VLV_EDP_PSR_STATUS_CTL(PIPE_B)) &
>> + VLV_EDP_PSR_CURR_STATE_MASK;
>> + enabled = ((statA == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
>> + (statA == VLV_EDP_PSR_ACTIVE_SF_UPDATE) ||
>> + (statB == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
>> + (statB == VLV_EDP_PSR_ACTIVE_SF_UPDATE));
>> + } else
>> + enabled = I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE;
>> + }
>> + seq_printf(m, "Enabled: %s", yesno(enabled));
>>
>> - if (HAS_PSR(dev))
>> + if (IS_VALLEYVIEW(dev)) {
>> + if ((statA == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
>> + (statA == VLV_EDP_PSR_ACTIVE_SF_UPDATE))
>> + seq_puts(m, " pipe A");
>> + if ((statB == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
>> + (statB == VLV_EDP_PSR_ACTIVE_SF_UPDATE))
>> + seq_puts(m, " pipe B");
>> + }
>> +
>> + seq_puts(m, "\n");
>> +
>> + /* VLV PSR has no kind of performance counter */
>> + if (HAS_PSR(dev) && !IS_VALLEYVIEW(dev)) {
>> psrperf = I915_READ(EDP_PSR_PERF_CNT(dev)) &
>> EDP_PSR_PERF_CNT_MASK;
>> - seq_printf(m, "Performance_Counter: %u\n", psrperf);
>> + seq_printf(m, "Performance_Counter: %u\n", psrperf);
>> + }
>>
>> intel_runtime_pm_put(dev_priv);
>> return 0;
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>> index 7c53d4d..34dee24 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -747,6 +747,7 @@ struct i915_psr {
>> bool sink_support;
>> bool source_ok;
>> bool setup_done;
>> + bool active;
>> };
>>
>> enum intel_pch {
>> @@ -1866,7 +1867,8 @@ struct drm_i915_file_private {
>>
>> #define HAS_DDI(dev) (INTEL_INFO(dev)->has_ddi)
>> #define HAS_FPGA_DBG_UNCLAIMED(dev) (INTEL_INFO(dev)->has_fpga_dbg)
>> -#define HAS_PSR(dev) (IS_HASWELL(dev) || IS_BROADWELL(dev))
>> +#define HAS_PSR(dev) (IS_HASWELL(dev) || IS_BROADWELL(dev) || \
>> + IS_VALLEYVIEW(dev))
>> #define HAS_PC8(dev) (IS_HASWELL(dev)) /* XXX HSW:ULX */
>> #define HAS_RUNTIME_PM(dev) (IS_HASWELL(dev))
>>
>> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
>> index 39770f7..01137fe 100644
>> --- a/drivers/gpu/drm/i915/i915_gem.c
>> +++ b/drivers/gpu/drm/i915/i915_gem.c
>> @@ -1256,6 +1256,9 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
>> goto unlock;
>> }
>>
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>> +
>> /* Try to flush the object off the GPU without holding the lock.
>> * We will repeat the flush holding the lock in the normal manner
>> * to catch cases where we are gazumped.
>> @@ -1299,6 +1302,9 @@ i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
>> if (ret)
>> return ret;
>>
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>> +
>> obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
>> if (&obj->base == NULL) {
>> ret = -ENOENT;
>> @@ -4059,6 +4065,9 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
>> if (ret)
>> return ret;
>>
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>
> The locking for PSR seems to be as fubar as for FBC. Also the front
> buffer tracking is missing, but I guess I need to make that work for FBC
> first, and then we need to figure out how to tie it in w/ PSR.
>
agree... I'll wait your fbc work.
>> +
>> obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
>> if (&obj->base == NULL) {
>> ret = -ENOENT;
>> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
>> index cbbaf26..2039d71 100644
>> --- a/drivers/gpu/drm/i915/i915_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>> @@ -1968,6 +1968,43 @@
>> #define BCLRPAT(pipe) _PIPE(pipe, _BCLRPAT_A, _BCLRPAT_B)
>> #define VSYNCSHIFT(trans) _TRANSCODER(trans, _VSYNCSHIFT_A, _VSYNCSHIFT_B)
>>
>> +/* VLV eDP PSR registers */
>> +#define _PSRCTLA (VLV_DISPLAY_BASE + 0x60090)
>> +#define _PSRCTLB (VLV_DISPLAY_BASE + 0x61090)
>> +#define VLV_EDP_PSR_ENABLE (1<<0)
>> +#define VLV_EDP_PSR_RESET (1<<1)
>> +#define VLV_EDP_PSR_MODE_MASK (7<<2)
>> +#define VLV_EDP_PSR_MODE_HW_TIMER (1<<3)
>> +#define VLV_EDP_PSR_MODE_SW_TIMER (1<<2)
>> +#define VLV_EDP_PSR_SINGLE_FRAME_UPDATE (1<<7)
>> +#define VLV_EDP_PSR_ACTIVE_ENTRY (1<<8)
>> +#define VLV_EDP_PSR_SRC_TRANSMITTER_STATE (1<<9)
>> +#define VLV_EDP_PSR_DBL_FRAME (1<<10)
>> +#define VLV_EDP_PSR_FRAME_COUNT_MASK (0xff<<16)
>> +#define VLV_EDP_PSR_IDLE_FRAME_SHIFT 16
>> +#define VLV_EDP_PSR_INT_TRANSITION (1<<24)
>> +#define VLV_EDP_PSR_CTL(pipe) _PIPE(pipe, _PSRCTLA, _PSRCTLB)
>
> Can we just name the PSR registers like in the spec? Eg. just
> VLV_PSRCTL(). Would make it easier to compare things w/ the spec.
>
Done.
>> +
>> +#define _VSCSDPA (VLV_DISPLAY_BASE + 0x600a0)
>> +#define _VSCSDPB (VLV_DISPLAY_BASE + 0x610a0)
>> +#define VLV_EDP_PSR_SDP_FREQ_MASK (3<<30)
>> +#define VLV_EDP_PSR_SDP_FREQ_ONCE (1<<31)
>> +#define VLV_EDP_PSR_SDP_FREQ_EVFRAME (1<<30)
>> +#define VLV_EDP_VSC_SDP_REG(pipe) _PIPE(pipe, _VSCSDPA, _VSCSDPB)
>> +
>> +#define _PSRSTATA (VLV_DISPLAY_BASE + 0x60094)
>> +#define _PSRSTATB (VLV_DISPLAY_BASE + 0x61094)
>> +#define VLV_EDP_PSR_LAST_STATE_MASK (7<<3)
>> +#define VLV_EDP_PSR_CURR_STATE_MASK 7
>> +#define VLV_EDP_PSR_DISABLED (0<<0)
>> +#define VLV_EDP_PSR_INACTIVE (1<<0)
>> +#define VLV_EDP_PSR_IN_TRANS_TO_ACTIVE (2<<0)
>> +#define VLV_EDP_PSR_ACTIVE_NORFB_UP (3<<0)
>> +#define VLV_EDP_PSR_ACTIVE_SF_UPDATE (4<<0)
>> +#define VLV_EDP_PSR_EXIT (5<<0)
>> +#define VLV_EDP_PSR_IN_TRANS (1<<7)
>> +#define VLV_EDP_PSR_STATUS_CTL(pipe) _PIPE(pipe, _PSRSTATA, _PSRSTATB)
>> +
>> /* HSW+ eDP PSR registers */
>> #define EDP_PSR_BASE(dev) (IS_HASWELL(dev) ? 0x64800 : 0x6f800)
>> #define EDP_PSR_CTL(dev) (EDP_PSR_BASE(dev) + 0)
>> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>> index 1a9aa19..081c8e2 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -7501,6 +7501,9 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
>> u32 base = 0, pos = 0;
>> bool visible;
>>
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>> +
>> if (on)
>> base = intel_crtc->cursor_addr;
>>
>> @@ -8228,16 +8231,20 @@ void intel_mark_idle(struct drm_device *dev)
>>
>> if (dev_priv->info->gen >= 6)
>> gen6_rps_idle(dev->dev_private);
>> +
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_update(dev);
>> }
>>
>> +
>> void intel_mark_fb_busy(struct drm_i915_gem_object *obj,
>> struct intel_ring_buffer *ring)
>> {
>> struct drm_device *dev = obj->base.dev;
>> struct drm_crtc *crtc;
>>
>> - if (!i915.powersave)
>> - return;
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>>
>> list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
>> if (!crtc->fb)
>> @@ -8688,6 +8695,10 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
> nav> if (work == NULL)
sorry, I didn't get this..
what did you mean?
>> return -ENOMEM;
>>
>> + /* Inactivate PSR early in page flip */
>> + if (IS_VALLEYVIEW(dev))
>> + intel_edp_psr_inactivate(dev);
>> +
>> work->event = event;
>> work->crtc = crtc;
>> work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
>> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>> index 30d4350..e9a0ace 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>> @@ -1578,21 +1578,35 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
>> }
>> }
>>
>> -static bool is_edp_psr(struct drm_device *dev)
>> +static bool is_edp_psr(struct intel_dp *intel_dp)
>> +{
>> + return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED;
>> +}
>> +
>> +static bool vlv_edp_is_psr_enabled_on_pipe(struct drm_device *dev, int pipe)
>> {
>> struct drm_i915_private *dev_priv = dev->dev_private;
>> + uint32_t val;
>>
>> - return dev_priv->psr.sink_support;
>> + val = I915_READ(VLV_EDP_PSR_STATUS_CTL(pipe)) &
>> + VLV_EDP_PSR_CURR_STATE_MASK;
>> + return (val == VLV_EDP_PSR_ACTIVE_NORFB_UP) ||
>> + (val == VLV_EDP_PSR_ACTIVE_SF_UPDATE);
>> }
>>
>> static bool intel_edp_is_psr_enabled(struct drm_device *dev)
>> {
>> struct drm_i915_private *dev_priv = dev->dev_private;
>>
>> - if (!HAS_PSR(dev))
>> - return false;
>> + if (HAS_PSR(dev)) {
>> + if (IS_VALLEYVIEW(dev))
>> + return vlv_edp_is_psr_enabled_on_pipe(dev, PIPE_A) ||
>> + vlv_edp_is_psr_enabled_on_pipe(dev, PIPE_B);
>> + else
>> + return I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE;
>> + }
>>
>> - return I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE;
>> + return false;
>> }
>>
>> static void intel_edp_psr_write_vsc(struct intel_dp *intel_dp,
>> @@ -1626,28 +1640,49 @@ static void intel_edp_psr_write_vsc(struct intel_dp *intel_dp,
>>
>> static void intel_edp_psr_setup(struct intel_dp *intel_dp)
>> {
>> - struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>> + struct drm_device *dev = intel_dig_port->base.base.dev;
>> struct drm_i915_private *dev_priv = dev->dev_private;
>> struct edp_vsc_psr psr_vsc;
>> + uint32_t val;
>>
>> if (dev_priv->psr.setup_done)
>> return;
>>
>> - /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */
>> - memset(&psr_vsc, 0, sizeof(psr_vsc));
>> - psr_vsc.sdp_header.HB0 = 0;
>> - psr_vsc.sdp_header.HB1 = 0x7;
>> - psr_vsc.sdp_header.HB2 = 0x2;
>> - psr_vsc.sdp_header.HB3 = 0x8;
>> - intel_edp_psr_write_vsc(intel_dp, &psr_vsc);
>> + if (IS_VALLEYVIEW(dev)) {
>> + val = I915_READ(VLV_EDP_VSC_SDP_REG(PIPE_A));
>> + val &= ~VLV_EDP_PSR_SDP_FREQ_MASK;
>> + val |= VLV_EDP_PSR_SDP_FREQ_EVFRAME;
>> + I915_WRITE(VLV_EDP_VSC_SDP_REG(PIPE_A), val);
>> +
>> + val = I915_READ(VLV_EDP_VSC_SDP_REG(PIPE_B));
>> + val &= ~VLV_EDP_PSR_SDP_FREQ_MASK;
>> + val |= VLV_EDP_PSR_SDP_FREQ_EVFRAME;
>> + I915_WRITE(VLV_EDP_VSC_SDP_REG(PIPE_B), val);
>> + } else {
>> + /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */
>> + memset(&psr_vsc, 0, sizeof(psr_vsc));
>> + psr_vsc.sdp_header.HB0 = 0;
>> + psr_vsc.sdp_header.HB1 = 0x7;
>> + psr_vsc.sdp_header.HB2 = 0x2;
>> + psr_vsc.sdp_header.HB3 = 0x8;
>> + intel_edp_psr_write_vsc(intel_dp, &psr_vsc);
>>
>> - /* Avoid continuous PSR exit by masking memup and hpd */
>> - I915_WRITE(EDP_PSR_DEBUG_CTL(dev), EDP_PSR_DEBUG_MASK_MEMUP |
>> - EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP);
>> + /* Avoid continuous PSR exit by masking memup and hpd */
>> + I915_WRITE(EDP_PSR_DEBUG_CTL(dev), EDP_PSR_DEBUG_MASK_MEMUP |
>> + EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP);
>> + }
>>
>> dev_priv->psr.setup_done = true;
>> }
>>
>> +static void vlv_edp_psr_enable_sink(struct intel_dp *intel_dp)
>> +{
>> + /* Enable PSR in sink */
>> + intel_dp_aux_native_write_1(intel_dp, DP_PSR_EN_CFG,
>> + DP_PSR_ENABLE);
>
> Don't we want the same main-link poweroff logic as HSW?
I can't remember why I'm not disabling main link here... So I did a
quickly try now and failure on tests was huge... so let's keep it
simple for now ;)
> Or maybe we
> should just keep the main link on always as long as we can't enter
> the low power states w/ DPLL/pipe/port off.
>
> Did you already figure out why that's not happening? Looking at the
> PSRSTAT registers, my guess is that D0i1 is where we end up currently,
> and that doesn't actually turn off anything but the planes (to stop
> memory fetches). D0i2 would turn off everything.
no idea.. :(
> But I guess we should anyway do this in steps. First getting the
> current stuff in, then trying to get into D0i2 state, and finally
> getting the display power well turned off when in PSR.
Agree.
>
> I think once we get to working on D0i2, we'll need to move the PSR
> wakeup to happen from a workqueue since it essentially requires a
> full modeset. Even now in your code it's somewhat questionable
> since you're doing stuff like aux transfers while holding
> struct_mutex.
uhm... anything we should try now to improve?
>
>> +}
>> +
>> static void intel_edp_psr_enable_sink(struct intel_dp *intel_dp)
>> {
>> struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> @@ -1678,6 +1713,28 @@ static void intel_edp_psr_enable_sink(struct intel_dp *intel_dp)
>> (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT));
>> }
>>
>> +static void vlv_edp_psr_enable_source(struct intel_dp *intel_dp)
>> +{
>> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>> + struct drm_device *dev = intel_dig_port->base.base.dev;
>> + struct drm_i915_private *dev_priv = dev->dev_private;
>> + struct intel_crtc *intel_crtc =
>> + to_intel_crtc(intel_dig_port->base.base.crtc);
>> +
>> + uint32_t idle_frames = 1;
>> + uint32_t val;
>> +
>> + val = I915_READ(VLV_EDP_PSR_CTL(intel_crtc->pipe));
>
> I don't think we want to preserve anything here. We need to make sure
> everything is initialized correctly rather than trusting some old junk
> in the register.
Done.
>
>> + val |= VLV_EDP_PSR_ENABLE;
>> + val &= ~VLV_EDP_PSR_MODE_MASK;
>> +
>> + val |= VLV_EDP_PSR_MODE_HW_TIMER;
>> + val &= ~VLV_EDP_PSR_FRAME_COUNT_MASK;
>> + val |= idle_frames << EDP_PSR_IDLE_FRAME_SHIFT;
>> +
>> + I915_WRITE(VLV_EDP_PSR_CTL(intel_crtc->pipe), val);
>> +}
>> +
>> static void intel_edp_psr_enable_source(struct intel_dp *intel_dp)
>> {
>> struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> @@ -1719,8 +1776,8 @@ static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp)
>> return false;
>> }
>>
>> - if ((intel_encoder->type != INTEL_OUTPUT_EDP) ||
>> - (dig_port->port != PORT_A)) {
>> + if (HAS_DDI(dev) && ((intel_encoder->type != INTEL_OUTPUT_EDP) ||
>> + (dig_port->port != PORT_A))) {
>> DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n");
>> return false;
>> }
>> @@ -1765,37 +1822,83 @@ static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp)
>> return false;
>> }
>>
>> + /* Baytrail supports per-pipe PSR configuration, however PSR on
>> + * PIPE_B isn't working properly. So let's keep it disabled for now. */
>> + if (IS_VALLEYVIEW(dev) && intel_crtc->pipe != PIPE_A) {
>> + DRM_DEBUG_KMS("PSR on BYT isn't enabled on pipe B.\n");
>> + return false;
>> + }
>> +
>> dev_priv->psr.source_ok = true;
>> return true;
>> }
>>
>> static void intel_edp_psr_do_enable(struct intel_dp *intel_dp)
>> {
>> - struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>> + struct drm_device *dev = intel_dig_port->base.base.dev;
>> + struct drm_i915_private *dev_priv = dev->dev_private;
>> + struct intel_crtc *intel_crtc =
>> + to_intel_crtc(intel_dig_port->base.base.crtc);
>>
>> - if (!intel_edp_psr_match_conditions(intel_dp) ||
>> - intel_edp_is_psr_enabled(dev))
>> - return;
>> + if (IS_VALLEYVIEW(dev)) {
>> + if (vlv_edp_is_psr_enabled_on_pipe(dev, intel_crtc->pipe))
>> + return;
>> + } else
>> + if (intel_edp_is_psr_enabled(dev))
>> + return;
>>
>> /* Setup PSR once */
>> intel_edp_psr_setup(intel_dp);
>>
>> /* Enable PSR on the panel */
>> - intel_edp_psr_enable_sink(intel_dp);
>> + if (IS_VALLEYVIEW(dev))
>> + vlv_edp_psr_enable_sink(intel_dp);
>> + else
>> + intel_edp_psr_enable_sink(intel_dp);
>>
>> /* Enable PSR on the host */
>> - intel_edp_psr_enable_source(intel_dp);
>> + if (IS_VALLEYVIEW(dev))
>> + vlv_edp_psr_enable_source(intel_dp);
>> + else
>> + intel_edp_psr_enable_source(intel_dp);
>> +
>> + dev_priv->psr.active = true;
>> }
>>
>> void intel_edp_psr_enable(struct intel_dp *intel_dp)
>> {
>> - struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> + if (!is_edp_psr(intel_dp))
>> + return;
>>
>> - if (intel_edp_psr_match_conditions(intel_dp) &&
>> - !intel_edp_is_psr_enabled(dev))
>> + if (intel_edp_psr_match_conditions(intel_dp))
>> intel_edp_psr_do_enable(intel_dp);
>> }
>>
>> +void vlv_edp_psr_disable(struct intel_dp *intel_dp)
>> +{
>> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>> + struct drm_device *dev = intel_dig_port->base.base.dev;
>> + struct drm_i915_private *dev_priv = dev->dev_private;
>> + struct intel_crtc *intel_crtc =
>> + to_intel_crtc(intel_dig_port->base.base.crtc);
>> + uint32_t val = I915_READ(VLV_EDP_PSR_STATUS_CTL(intel_crtc->pipe));
>> +
>> + if (!dev_priv->psr.setup_done)
>> + return;
>> +
>> + intel_edp_psr_inactivate(dev);
>> +
>> + if (val & VLV_EDP_PSR_IN_TRANS)
>> + udelay(250);
>
> Might we want a warning if the bit doesn't go down in expected time?
Done.
>
>> +
>> + val = I915_READ(VLV_EDP_PSR_CTL(intel_crtc->pipe));
>> + val &= ~VLV_EDP_PSR_ACTIVE_ENTRY;
>> + val &= ~VLV_EDP_PSR_ENABLE;
>> + val &= ~VLV_EDP_PSR_MODE_MASK;
>> + I915_WRITE(VLV_EDP_PSR_CTL(intel_crtc->pipe), val);
>> +}
>> +
>> void intel_edp_psr_disable(struct intel_dp *intel_dp)
>> {
>> struct drm_device *dev = intel_dp_to_dev(intel_dp);
>> @@ -1817,28 +1920,66 @@ void intel_edp_psr_update(struct drm_device *dev)
>> {
>> struct intel_encoder *encoder;
>> struct intel_dp *intel_dp = NULL;
>> + struct intel_crtc *intel_crtc;
>>
>> list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head)
>> if (encoder->type == INTEL_OUTPUT_EDP) {
>> intel_dp = enc_to_intel_dp(&encoder->base);
>>
>> - if (!is_edp_psr(dev))
>> + if (!is_edp_psr(intel_dp))
>> return;
>>
>> - if (!intel_edp_psr_match_conditions(intel_dp))
>> - intel_edp_psr_disable(intel_dp);
>> - else
>> + intel_crtc = to_intel_crtc(encoder->base.crtc);
>> +
>> + if (!intel_edp_psr_match_conditions(intel_dp)) {
>> + if (IS_VALLEYVIEW(dev))
>> + vlv_edp_psr_disable(intel_dp);
>> + else
>> + intel_edp_psr_disable(intel_dp);
>> + } else
>> if (!intel_edp_is_psr_enabled(dev))
>> intel_edp_psr_do_enable(intel_dp);
>> }
>> }
>>
>> +void intel_edp_psr_inactivate(struct drm_device *dev)
>> +{
>> + struct drm_i915_private *dev_priv = dev->dev_private;
>> + struct intel_encoder *encoder;
>> + struct intel_crtc *intel_crtc;
>> + struct intel_dp *intel_dp = NULL;
>> +
>> + if (!dev_priv->psr.setup_done || !dev_priv->psr.active)
>> + return;
>> +
>> + list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head)
>> + if (encoder->type == INTEL_OUTPUT_EDP) {
>> + intel_dp = enc_to_intel_dp(&encoder->base);
>> + intel_crtc = to_intel_crtc(encoder->base.crtc);
>> +
>> + if (!vlv_edp_is_psr_enabled_on_pipe(dev,
>> + intel_crtc->pipe))
>> + continue;
>> +
>> + dev_priv->psr.active = false;
>> + I915_WRITE(VLV_EDP_PSR_CTL(intel_crtc->pipe),
>> + VLV_EDP_PSR_RESET);
>> + /* WaClearPSRReset:vlv */
>> + I915_WRITE(VLV_EDP_PSR_CTL(intel_crtc->pipe), 0);
>> +
>> + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
>> + }
>> +}
>> +
>> static void intel_disable_dp(struct intel_encoder *encoder)
>> {
>> struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
>> enum port port = dp_to_dig_port(intel_dp)->port;
>> struct drm_device *dev = encoder->base.dev;
>>
>> + if (IS_VALLEYVIEW(dev))
>> + vlv_edp_psr_disable(intel_dp);
>> +
>> /* Make sure the panel is off before trying to change the mode. But also
>> * ensure that we have vdd while we switch off the panel. */
>> intel_edp_backlight_off(intel_dp);
>> @@ -1895,6 +2036,7 @@ static void vlv_enable_dp(struct intel_encoder *encoder)
>> struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
>>
>> intel_edp_backlight_on(intel_dp);
>> + intel_edp_psr_enable(intel_dp);
>> }
>>
>> static void g4x_pre_enable_dp(struct intel_encoder *encoder)
>> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>> index 71c1371..82026ef 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -748,6 +748,7 @@ void intel_edp_panel_off(struct intel_dp *intel_dp);
>> void intel_edp_psr_enable(struct intel_dp *intel_dp);
>> void intel_edp_psr_disable(struct intel_dp *intel_dp);
>> void intel_edp_psr_update(struct drm_device *dev);
>> +void intel_edp_psr_inactivate(struct drm_device *dev);
>>
>>
>> /* intel_dsi.c */
>> --
>> 1.8.1.2
>
> --
> Ville Syrjälä
> Intel OTC
Thank you very much!
--
Rodrigo Vivi
Blog: http://blog.vivi.eng.br
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