drm/amd/display: dsc validate fail not pass to atomic check
authorhersen wu <hersenxs.wu@amd.com>
Sun, 29 May 2022 14:54:30 +0000 (10:54 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Wed, 15 Jun 2022 01:38:40 +0000 (21:38 -0400)
commit71be4b16d39ac8b25a8a04eda66cb65581e1a03c
tree1c667695f27bab6263f2b0e322b70aa1808191a2
parentb840b64bc8ed3fc46f6d6aa7f97c43862a33bea5
drm/amd/display: dsc validate fail not pass to atomic check

[Why] when 4k@144hz dp connect to dp1.4 dsc mst hub, requested
bandwidth exceeds caps of dsc hub. but dsc bw valid functions,
increase_dsc_bpp, try_disable_dsc, pre_validate_dsc,
compute_mst_dsc_configs_for_state, do not return false to
atomic check. this cause user mode initiate mode set to kernel,
then cause kernel assert, system hang.

[How] dsc bandwidth valid functions return pass or fail to atomic
check.

Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h