[Public]
Reviewed-by: Alex Deucher
From: RyanLin
Sent: Thursday, January 27, 2022 10:47 PM
To: Wentland, Harry ; Li, Sun peng (Leo)
; Deucher, Alexander ; Koenig,
Christian ; david1.z...@amd.com
; airl...@linux.ie ; dan...@ffwll.ch
; seanp...@chromium.org ;
b...@basnieuwenhuizen.nl ; Kazlauskas, Nicholas
; sas...@kernel.org ;
markyac...@google.com ; victorchengchi...@amd.com
; ching-shih...@amd.corp-partner.google.com
; Siqueira, Rodrigo
; ddavenp...@chromium.org ;
amd-...@lists.freedesktop.org ;
dri-devel@lists.freedesktop.org ;
linux-ker...@vger.kernel.org ; Li, Leon
Cc: Lin, Tsung-hua (Ryan)
Subject: [PATCH v2 1/28] drm/amdgpu: fix that issue that the number of the crtc
of the 3250c is not correct
v2:
- remove unnecessary comments and Id
[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.
>From 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
---
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..455a2c45e8cd 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) {
+ 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
