[Intel-gfx] [PATCH v4 2/4] drm/i915/psr: Clear frontbuffer busy bits on flip

[Jouni Högander]

We are planning to move flush performed from work queue. This
means it is possible to have invalidate -> flip -> flush sequence.
Handle this by clearing possible busy bits on flip.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 79e57a5e1738..b9e38acc5132 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -2230,6 +2230,12 @@ static void _intel_psr_post_plane_update(const struct intel_atomic_state *state,
 		if (crtc_state->crc_enabled && psr->enabled)
 			psr_force_hw_tracking_exit(intel_dp);
 
+		/*
+		 * Clear possible busy bits in case we have
+		 * invalidate -> flip -> flush sequence.
+		 */
+		intel_dp->psr.busy_frontbuffer_bits = 0;
+
 		mutex_unlock(&psr->lock);
 	}
 }
-- 
2.34.1