On Thu, Jan 27, 2022 at 3:12 AM RyanLin Tsung-Hua.Lin@amd.com wrote:
[Why] External displays take priority over internal display when there are fewer display controllers than displays.
[How] The root cause is because of that number of the crtc is not correct. The number of the crtc on the 3250c is 3, but on the 3500c is 4. On the source code, we can see that number of the crtc has been fixed at 4. Needs to set the num_crtc to 3 for 3250c platform.
Signed-off-by: RyanLin Tsung-Hua.Lin@amd.com Change-Id: I837df7101cc4849d2c3021fd529b4061edab4bb1
Please drop the gerrit ID.
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 +++++++++--- 1 file changed, 9 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 40c91b448f7d..dbeef7b57a9b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2738,9 +2738,15 @@ static int dm_early_init(void *handle) break; #if defined(CONFIG_DRM_AMD_DC_DCN1_0) case CHIP_RAVEN:
adev->mode_info.num_crtc = 4;adev->mode_info.num_hpd = 4;adev->mode_info.num_dig = 4;
if (adev->rev_id >= 8) { //chip_name = "raven2";adev->mode_info.num_crtc = 3;adev->mode_info.num_hpd = 3;adev->mode_info.num_dig = 3;} else {adev->mode_info.num_crtc = 4;adev->mode_info.num_hpd = 4;adev->mode_info.num_dig = 4;} break;#endif
#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
2.25.1