[Intel-gfx] [PATCH 1/2] drm/i915/psr: Ensure panel granularity aligns with DSC slice height

[Jouni Högander]

Do not enable psr2 if panel ganularity is not aligned with DSC slice
height when DSC is enabled

Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Mika Kahola <mika.kahola at intel.com>

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index e11b0592055f..57575b5c6d48 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -779,6 +779,7 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
 				   struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
 	const int crtc_hdisplay = crtc_state->hw.adjusted_mode.crtc_hdisplay;
 	const int crtc_vdisplay = crtc_state->hw.adjusted_mode.crtc_vdisplay;
 	u16 y_granularity = 0;
@@ -809,6 +810,10 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
 	if (y_granularity == 0 || crtc_vdisplay % y_granularity)
 		return false;
 
+	if (crtc_state->dsc.compression_enable &&
+	    vdsc_cfg->slice_height % y_granularity)
+		return false;
+
 	crtc_state->su_y_granularity = y_granularity;
 	return true;
 }
-- 
2.34.1