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| author | SivapiriyanKumarasamy | 2019-06-14 21:04:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-08-16 10:12:44 +0200 |
| commit | 2a5e21adc71b46beec9232cc6418676fd2255bc5 (patch) | |
| tree | b3056777a39ae5aea69ee4e53048f4d20a8e2392 | |
| parent | scripts/sphinx-pre-install: fix script for RHEL/CentOS (diff) | |
| download | kernel-qcow2-linux-2a5e21adc71b46beec9232cc6418676fd2255bc5.tar.gz kernel-qcow2-linux-2a5e21adc71b46beec9232cc6418676fd2255bc5.tar.xz kernel-qcow2-linux-2a5e21adc71b46beec9232cc6418676fd2255bc5.zip | |
drm/amd/display: Wait for backlight programming completion in set backlight level
[ Upstream commit c7990daebe71d11a9e360b5c3b0ecd1846a3a4bb ]
[WHY]
Currently we don't wait for blacklight programming completion in DMCU
when setting backlight level. Some sequences such as PSR static screen
event trigger reprogramming requires it to be complete.
[How]
Add generic wait for dmcu command completion in set backlight level.
Signed-off-by: SivapiriyanKumarasamy <sivapiriyan.kumarasamy@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@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/dc/dce/dce_abm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c index 070ab56a8aca..da8b198538e5 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c @@ -242,6 +242,10 @@ static void dmcu_set_backlight_level( s2 |= (level << ATOM_S2_CURRENT_BL_LEVEL_SHIFT); REG_WRITE(BIOS_SCRATCH_2, s2); + + /* waitDMCUReadyForCmd */ + REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, + 0, 1, 80000); } static void dce_abm_init(struct abm *abm) |