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| author | Fangzhi Zuo <Jerry.Zuo@amd.com> | 2024-12-02 13:30:37 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:04:48 +0100 |
| commit | b79eaf9b86a8789f15a2ed05c6ffe2b4e5e35aea (patch) | |
| tree | 193184dbb3fd226bd1a5098d36ebd39e461557c9 | |
| parent | 1eec554f898b666386c4860adae0acbcbf9eaf32 (diff) | |
| download | linux-b79eaf9b86a8789f15a2ed05c6ffe2b4e5e35aea.tar.gz linux-b79eaf9b86a8789f15a2ed05c6ffe2b4e5e35aea.tar.bz2 linux-b79eaf9b86a8789f15a2ed05c6ffe2b4e5e35aea.zip | |
drm/amd/display: Fix Mode Cutoff in DSC Passthrough to DP2.1 Monitor
[ Upstream commit e56ad45e991128bf4db160b75a1d9f647a341d8f ]
Source --> DP2.1 MST hub --> DP1.4/2.1 monitor
When change from DP1.4 to DP2.1 from monitor manual, modes higher than
4k120 are all cutoff by mode validation. Switch back to DP1.4 gets all
the modes up to 4k240 available to be enabled by dsc passthrough.
[why]
Compared to DP1.4 link from hub to monitor, DP2.1 link has larger
full_pbn value that causes overflow in the process of doing conversion
from pbn to kbps.
[how]
Change the data type accordingly to fit into the data limit during
conversion calculation.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 6 |
1 files changed, 3 insertions, 3 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 754dbc544f03..5bdf44c69218 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 @@ -1691,16 +1691,16 @@ clean_exit: return ret; } -static unsigned int kbps_from_pbn(unsigned int pbn) +static uint32_t kbps_from_pbn(unsigned int pbn) { - unsigned int kbps = pbn; + uint64_t kbps = (uint64_t)pbn; kbps *= (1000000 / PEAK_FACTOR_X1000); kbps *= 8; kbps *= 54; kbps /= 64; - return kbps; + return (uint32_t)kbps; } static bool is_dsc_common_config_possible(struct dc_stream_state *stream, |