If a eDP panel supports both PSR2 and VDSC, our HW cannot
support both at a time. Give priority to PSR2 if a requested
resolution can be supported without compression else enable
VDSC and keep PSR2 disabled.
v4:
Fix the unrealted stuff removed during rebase (Ville)
v3:
* Rebase
v2:
* Add warning for DSC and PSR2 enabled together (DK)
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_psr.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 48df16a02fac..c42670b20326 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -75,6 +75,10 @@ static bool intel_psr2_enabled(struct drm_i915_private *dev_priv,
if (i915_modparams.enable_psr == -1)
return false;
+ /* Cannot enable DSC and PSR2 simultaneously */
+ WARN_ON(crtc_state->dsc_params.compression_enable &&
+ crtc_state->has_psr2);
+
switch (dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK) {
case I915_PSR_DEBUG_FORCE_PSR1:
return false;
@@ -463,6 +467,16 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
if (!dev_priv->psr.sink_psr2_support)
return false;
+ /*
+ * DSC and PSR2 cannot be enabled simultaneously. If a requested
+ * resolution requires DSC to be enabled, priority is given to DSC
+ * over PSR2.
+ */
+ if (crtc_state->dsc_params.compression_enable) {
+ DRM_DEBUG_KMS("PSR2 cannot be enabled since DSC is enabled\n");
+ return false;
+ }
+
if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
psr_max_h = 4096;
psr_max_v = 2304;
--
2.19.1
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