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| author | vathsala nagaraju <vathsala.nagaraju@intel.com> | 2017-09-26 11:59:13 +0200 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-09-28 18:40:34 +0200 |
| commit | 977da084cc3c1791ecd6faed55e0ab41e7231660 (patch) | |
| tree | effec147002faf49e0f76016ab48cda133d4a8aa /drivers/gpu/drm/i915 | |
| parent | drm/dp: Add defines for latency in sink (diff) | |
| download | linux-977da084cc3c1791ecd6faed55e0ab41e7231660.tar.xz linux-977da084cc3c1791ecd6faed55e0ab41e7231660.zip | |
drm/i915/psr: Set frames before SU entry for psr2
Set frames before SU entry value for max resync frame count of
dpcd register 2009, bit field 0:3.
v2 :
- add macro EDP_PSR2_FRAME_BEFORE_SU (Rodrigo)
- remove EDP_FRAMES_BEFORE_SU_ENTRY (Rodrigo)
- add check ==1 for dpcd_read call (ville)
v3 : (Rodrigo)
- move macro EDP_PSR2_FRAME_BEFORE_SU after EDP_PSR2_FRAME_BEFORE_SU
- replace with &=
v4 :
- change the macro to shift value (jani)
- updated register names
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
CC: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1506419953-32605-2-git-send-email-vathsala.nagaraju@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e4c424ba5905..ee0d4f14ac98 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4055,7 +4055,7 @@ enum { #define EDP_PSR2_FRAME_BEFORE_SU_SHIFT 4 #define EDP_PSR2_FRAME_BEFORE_SU_MASK (0xf<<4) #define EDP_PSR2_IDLE_MASK 0xf -#define EDP_FRAMES_BEFORE_SU_ENTRY (1<<4) +#define EDP_PSR2_FRAME_BEFORE_SU(a) ((a)<<4) #define EDP_PSR2_STATUS_CTL _MMIO(0x6f940) #define EDP_PSR2_STATUS_STATE_MASK (0xf<<28) diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 0a17d1f3ca77..5419cda83ba8 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -327,6 +327,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp) */ uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames); uint32_t val; + uint8_t sink_latency; val = idle_frames << EDP_PSR_IDLE_FRAME_SHIFT; @@ -334,8 +335,16 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp) * mesh at all with our frontbuffer tracking. And the hw alone isn't * good enough. */ val |= EDP_PSR2_ENABLE | - EDP_SU_TRACK_ENABLE | - EDP_FRAMES_BEFORE_SU_ENTRY; + EDP_SU_TRACK_ENABLE; + + if (drm_dp_dpcd_readb(&intel_dp->aux, + DP_SYNCHRONIZATION_LATENCY_IN_SINK, + &sink_latency) == 1) { + sink_latency &= DP_MAX_RESYNC_FRAME_COUNT_MASK; + } else { + sink_latency = 0; + } + val |= EDP_PSR2_FRAME_BEFORE_SU(sink_latency + 1); if (dev_priv->vbt.psr.tp2_tp3_wakeup_time > 5) val |= EDP_PSR2_TP2_TIME_2500; |