drm/amd/display: Check for DSC support instead of ASIC revision

[ Upstream commit 349a19b2f1b01e713268c7de9944ad669ccdf369 ]

[why]
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.

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

Signed-off-by: Eryk Brol <eryk.brol@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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 d699a5cf6c11846988e217ba4d69e599c6caa370..8ad83ccfcc6a6275d0ae87d8d52fadbecc42fbd6 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -9383,7 +9383,7 @@ 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);