From: Aaron Ma <aaron...@canonical.com> [ Upstream commit 3b2e973dff59d88bee1d814ddf8762a24fc02b60 ]
RENOIR loads dmub fw not dmcu, check dmcu only will prevent loading iram, it breaks backlight control. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=208277 Acked-by: Alex Deucher <alexander.deuc...@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com> Signed-off-by: Aaron Ma <aaron...@canonical.com> Signed-off-by: Alex Deucher <alexander.deuc...@amd.com> Cc: sta...@vger.kernel.org Signed-off-by: Sasha Levin <sas...@kernel.org> --- 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 7da2a22dbde7e..837a286469ecf 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1345,7 +1345,7 @@ static int dm_late_init(void *handle) struct dmcu *dmcu = NULL; bool ret; - if (!adev->dm.fw_dmcu) + if (!adev->dm.fw_dmcu && !adev->dm.dmub_fw) return detect_mst_link_for_all_connectors(adev->ddev); dmcu = adev->dm.dc->res_pool->dmcu; -- 2.25.1
