diff options
| author | Nikola Cornij <nikola.cornij@amd.com> | 2021-06-08 03:36:05 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-06-22 00:45:14 +0300 |
| commit | 5d9e7fe8ef9b1c91a4821eef4533f4010e011117 (patch) | |
| tree | 143c2db8569be77b7bcdda5c4b803fa1b2680cec /drivers/gpu/drm/amd/display | |
| parent | d9b20b45ec32fff5430cc57b28aa20136ef09d76 (diff) | |
| download | linux-5d9e7fe8ef9b1c91a4821eef4533f4010e011117.tar.xz | |
drm/amd/display: Clamp VStartup value at DML calculations time
[why]
Some timings with a large VBlank cause the value to overflow the
register related, while also producing other wrong values in DML output.
[how]
Clamp VStartup at the DCN3.1 maximum value
Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c b/drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c index 06fac59a3d40..718d5a99dada 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn31/display_mode_vba_31.c @@ -2668,6 +2668,8 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman (double) v->WritebackDelay[v->VoltageLevel][k] / (v->HTotal[k] / v->PixelClock[k]), 1)); + if (v->MaxVStartupLines[k] > 1023) + v->MaxVStartupLines[k] = 1023; #ifdef __DML_VBA_DEBUG__ dml_print("DML::%s: k=%d MaxVStartupLines = %d\n", __func__, k, v->MaxVStartupLines[k]); @@ -5064,6 +5066,8 @@ void dml31_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l / (v->HTotal[k] / v->PixelClock[k]), 1.0)); + if (v->MaximumVStartup[i][j][k] > 1023) + v->MaximumVStartup[i][j][k] = 1023; v->MaxMaxVStartup[i][j] = dml_max(v->MaxMaxVStartup[i][j], v->MaximumVStartup[i][j][k]); } } |