Ensure vblank >= psr2 vblank
where
Psr2 vblank = PSR2_CTL Block Count Number maximum line count.
Bspec: 71580, 49274
v2: Use calculated block count number maximum line count
Signed-off-by: Jouni Högander <jouni.hogan...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_psr.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
b/drivers/gpu/drm/i915/display/intel_psr.c
index 07b0c016e78a..446c8acc265b 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -968,6 +968,15 @@ static bool intel_psr2_config_valid(struct intel_dp
*intel_dp,
return false;
}
+ /* Vblank >= PSR2_CTL Block Count Number maximum line count */
+ if (crtc_state->hw.adjusted_mode.crtc_vblank_end -
+ crtc_state->hw.adjusted_mode.crtc_vblank_start <
+ psr2_block_count_lines(intel_dp)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "PSR2 not enabled, too short vblank time\n");
+ return false;
+ }
+
if (HAS_PSR2_SEL_FETCH(dev_priv)) {
if (!intel_psr2_sel_fetch_config_valid(intel_dp, crtc_state) &&
!HAS_PSR_HW_TRACKING(dev_priv)) {
--
2.34.1
