[PATCH 05/14] drm/amd/display: Defer BW-optimization-blocked DRR adjustments

[Ray Wu]

From: John Olender <john.olender at gmail.com>

[Why & How]
Instead of dropping DRR updates, defer them. This fixes issues where
monitor continues to see incorrect refresh rate after VRR was turned off
by userspace.

Fixes: 32953485c558 ("drm/amd/display: Do not update DRR while BW optimizations pending")
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3546

Reviewed-by: Sun peng Li <sunpeng.li at amd.com>
Signed-off-by: John Olender <john.olender at gmail.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Signed-off-by: Ray Wu <ray.wu at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  2 ++
 drivers/gpu/drm/amd/display/dc/core/dc.c          | 13 ++++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 36c16030fca9..5a38748703b3 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -374,6 +374,8 @@ get_crtc_by_otg_inst(struct amdgpu_device *adev,
 static inline bool is_dc_timing_adjust_needed(struct dm_crtc_state *old_state,
 					      struct dm_crtc_state *new_state)
 {
+	if (new_state->stream->adjust.timing_adjust_pending)
+		return true;
 	if (new_state->freesync_config.state ==  VRR_STATE_ACTIVE_FIXED)
 		return true;
 	else if (amdgpu_dm_crtc_vrr_active(old_state) != amdgpu_dm_crtc_vrr_active(new_state))
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 528e6fd546c5..6ec22c0d5b97 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -441,9 +441,15 @@ bool dc_stream_adjust_vmin_vmax(struct dc *dc,
 	 * Don't adjust DRR while there's bandwidth optimizations pending to
 	 * avoid conflicting with firmware updates.
 	 */
-	if (dc->ctx->dce_version > DCE_VERSION_MAX)
-		if (dc->optimized_required || dc->wm_optimized_required)
+	if (dc->ctx->dce_version > DCE_VERSION_MAX) {
+		if (dc->optimized_required || dc->wm_optimized_required) {
+			if (!stream->adjust.timing_adjust_pending) {
+				stream->adjust.timing_adjust_pending = true;
+				DC_LOG_DEBUG("%s: deferring DRR update\n", __func__);
+			}
 			return false;
+		}
+	}
 
 	dc_exit_ips_for_hw_access(dc);
 
@@ -3241,7 +3247,8 @@ static void copy_stream_update_to_stream(struct dc *dc,
 
 	if (update->crtc_timing_adjust) {
 		if (stream->adjust.v_total_min != update->crtc_timing_adjust->v_total_min ||
-			stream->adjust.v_total_max != update->crtc_timing_adjust->v_total_max)
+			stream->adjust.v_total_max != update->crtc_timing_adjust->v_total_max ||
+			stream->adjust.timing_adjust_pending)
 			update->crtc_timing_adjust->timing_adjust_pending = true;
 		stream->adjust = *update->crtc_timing_adjust;
 		update->crtc_timing_adjust->timing_adjust_pending = false;
-- 
2.43.0