[PATCH 06/13] drm/amd/display: Check for DSC support instead of ASIC revision

Bindu Ramamurthy bindu.r at amd.com
Fri Feb 19 22:16:05 UTC 2021

From: Eryk Brol <eryk.brol at amd.com>

This check for ASIC revision is no longer useful and causes
lightup issues after a topology change in MST DSC scenario.
In this case, DSC configs should be recalculated for the new
topology. This check prevented that from happening on certain
ASICs that do, in fact, support DSC.

Change the ASIC revision to instead check if DSC is supported.

Signed-off-by: Eryk Brol <eryk.brol at amd.com>
Acked-by: Bindu Ramamurthy <bindu.r at amd.com>
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 cf3ee268ea4f..0970d9c14889 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9419,7 +9419,7 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
 #if defined(CONFIG_DRM_AMD_DC_DCN)
-	if (adev->asic_type >= CHIP_NAVI10) {
+	if (dc_resource_is_dsc_encoding_supported(dc)) {
 		for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
 			if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
 				ret = add_affected_mst_dsc_crtcs(state, crtc);

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