diff options
| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2023-09-27 15:06:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-10-09 16:58:55 -0400 |
| commit | 79df45dc4bfb13d9bd3a75338b9d9dab948be3d6 (patch) | |
| tree | 9e7aa1fbdec18e805326d42ecbd3f34cc89a415b /drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | |
| parent | ddd5298c63e45c51cff2cbea156d428329e8e607 (diff) | |
drm/amd/display: Don't use fsleep for PSR exit waits
[Why]
These functions can be called from high IRQ levels and the OS will hang
if it tries to use a usleep_highres or a msleep.
[How]
Replace the fsleep with a udelay.
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@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/dc/dce/dce_dmcu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c index b87bfecb7755..a8e79104b684 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c @@ -586,7 +586,8 @@ static void dcn10_dmcu_set_psr_enable(struct dmcu *dmcu, bool enable, bool wait) if (state == PSR_STATE0) break; } - fsleep(500); + /* must *not* be fsleep - this can be called from high irq levels */ + udelay(500); } /* assert if max retry hit */ |