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drm/amd/display: Don't use fsleep for PSR exit waits on dmub replay

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[ Upstream commit b5236da757adc75d7e52c69bdc233d29249a0d0c ]

[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 flseep with a udelay for dmub_replay_enable.

Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicholas Kazlauskas
2023-09-27 15:06:41 -04:00
committed by Greg Kroah-Hartman
parent 381113ef01
commit da696cbb47
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c
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@@ -102,7 +102,8 @@ static void dmub_replay_enable(struct dmub_replay *dmub, bool enable, bool wait,
break;
}
fsleep(500);
/* must *not* be fsleep - this can be called from high irq levels */
udelay(500);
}
/* assert if max retry hit */