This parameter is meant to be used when PSR issues are found as some
issues in the past was due wrong values set in VBT so this would be
a quick and easy way to ask users or for us to check if the issue is
due VBT values.
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 37 ++++++++++++++++++------
drivers/gpu/drm/i915/i915_params.c | 5 ++++
drivers/gpu/drm/i915/i915_params.h | 1 +
3 files changed, 34 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index b7a2c102648a..859780853f42 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -426,6 +426,12 @@ static u32 intel_psr1_get_tp_time(struct intel_dp *intel_dp)
if (INTEL_GEN(dev_priv) >= 11)
val |= EDP_PSR_TP4_TIME_0US;
+ if (i915_modparams.psr_safest_params) {
+ val |= EDP_PSR_TP1_TIME_2500us;
+ val |= EDP_PSR_TP2_TP3_TIME_2500us;
+ goto check_tp3_sel;
+ }
+
if (dev_priv->vbt.psr.tp1_wakeup_time_us == 0)
val |= EDP_PSR_TP1_TIME_0us;
else if (dev_priv->vbt.psr.tp1_wakeup_time_us <= 100)
@@ -444,6 +450,7 @@ static u32 intel_psr1_get_tp_time(struct intel_dp *intel_dp)
else
val |= EDP_PSR_TP2_TP3_TIME_2500us;
+check_tp3_sel:
if (intel_dp_source_supports_hbr2(intel_dp) &&
drm_dp_tps3_supported(intel_dp->dpcd))
val |= EDP_PSR_TP1_TP3_SEL;
@@ -495,18 +502,13 @@ static void hsw_activate_psr1(struct intel_dp *intel_dp)
intel_de_write(dev_priv, EDP_PSR_CTL(dev_priv->psr.transcoder), val);
}
-static void hsw_activate_psr2(struct intel_dp *intel_dp)
+static u32 intel_psr2_get_tp_time(struct intel_dp *intel_dp)
{
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
- u32 val;
-
- val = psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
-
- val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
- if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
- val |= EDP_Y_COORDINATE_ENABLE;
+ u32 val = 0;
- val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1);
+ if (i915_modparams.psr_safest_params)
+ return EDP_PSR2_TP2_TIME_2500us;
if (dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us >= 0 &&
dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us <= 50)
@@ -518,6 +520,23 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
else
val |= EDP_PSR2_TP2_TIME_2500us;
+ return val;
+}
+
+static void hsw_activate_psr2(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+ u32 val;
+
+ val = psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
+
+ val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
+ if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+ val |= EDP_Y_COORDINATE_ENABLE;
+
+ val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1);
+ val |= intel_psr2_get_tp_time(intel_dp);
+
/*
* PSR2 HW is incorrectly using EDP_PSR_TP1_TP3_SEL and BSpec is
* recommending keep this bit unset while PSR2 is enabled.
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index add00ec1f787..307e4667fc62 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -88,6 +88,11 @@ i915_param_named_unsafe(enable_psr, int, 0600,
"(0=disabled, 1=enabled) "
"Default: -1 (use per-chip default)");
+i915_param_named(psr_safest_params, bool, 0400,
+ "Replace PSR VBT parameters by the safest and not optimal ones. This "
+ "is helpfull to detect if PSR issues are related to bad values set in "
+ " VBT. (0=use VBT paramters, 1=use safest parameters)");
+
i915_param_named_unsafe(force_probe, charp, 0400,
"Force probe the driver for specified devices. "
"See CONFIG_DRM_I915_FORCE_PROBE for details.");
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index 45323732f099..2a99c908c7c8 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -53,6 +53,7 @@ struct drm_printer;
param(int, enable_dc, -1, 0400) \
param(int, enable_fbc, -1, 0600) \
param(int, enable_psr, -1, 0600) \
+ param(bool, psr_safest_params, false, 0600) \
param(int, disable_power_well, -1, 0400) \
param(int, enable_ips, 1, 0600) \
param(int, invert_brightness, 0, 0600) \
--
2.26.2
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