diff options
| author | Wayne Lin <[email protected]> | 2024-12-10 03:17:55 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2025-01-10 17:00:56 +0000 |
| commit | a04d9534a8a75b2806c5321c387be450c364b55e (patch) | |
| tree | 8205c499aead655148c2c8b93e9306ac73a06c10 | |
| parent | drm/amd/display: DML2.1 Post-Si Cleanup (diff) | |
| download | kernel-a04d9534a8a75b2806c5321c387be450c364b55e.tar.gz kernel-a04d9534a8a75b2806c5321c387be450c364b55e.zip | |
drm/amd/display: Validate mdoe under MST LCT=1 case as well
[Why & How]
Currently in dm_dp_mst_is_port_support_mode(), when valdidating mode
under dsc decoding at the last DP link config, we only validate the
case when there is an UFP. However, if the MSTB LCT=1, there is no
UFP.
Under this case, use root_link_bw_in_kbps as the available bw to
compare.
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3720
Fixes: fa57924c76d9 ("drm/amd/display: Refactor function dm_dp_mst_is_port_support_mode()")
Cc: Mario Limonciello <[email protected]>
Cc: Alex Deucher <[email protected]>
Reviewed-by: Jerry Zuo <[email protected]>
Signed-off-by: Wayne Lin <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index ca864f71ae66..a504aa1243e9 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -1835,11 +1835,15 @@ enum dc_status dm_dp_mst_is_port_support_mode( if (immediate_upstream_port) { virtual_channel_bw_in_kbps = kbps_from_pbn(immediate_upstream_port->full_pbn); virtual_channel_bw_in_kbps = min(root_link_bw_in_kbps, virtual_channel_bw_in_kbps); - if (bw_range.min_kbps > virtual_channel_bw_in_kbps) { - DRM_DEBUG_DRIVER("MST_DSC dsc decode at last link." - "Max dsc compression can't fit into MST available bw\n"); - return DC_FAIL_BANDWIDTH_VALIDATE; - } + } else { + /* For topology LCT 1 case - only one mstb*/ + virtual_channel_bw_in_kbps = root_link_bw_in_kbps; + } + + if (bw_range.min_kbps > virtual_channel_bw_in_kbps) { + DRM_DEBUG_DRIVER("MST_DSC dsc decode at last link." + "Max dsc compression can't fit into MST available bw\n"); + return DC_FAIL_BANDWIDTH_VALIDATE; } } |