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| author |   jsg <jsg@openbsd.org> | 2019-08-17 08:11:32 +0000 |
|---|---|---|
| committer | jsg <jsg@openbsd.org> | 2019-08-17 08:11:32 +0000 |
| commit | e8c354eb951bd770ccabff6d3ee31009c0abcaa5 (patch) | |
| tree | d2f6a50561966e8887529445a830c09ec266531c | |
| parent | change drm memory barriers to be closer to what linux does on (diff) | |
| download | wireguard-openbsd-e8c354eb951bd770ccabff6d3ee31009c0abcaa5.tar.xz wireguard-openbsd-e8c354eb951bd770ccabff6d3ee31009c0abcaa5.zip | |
drm/amd/display: Wait for backlight programming completion in set backlight level
From Sivapiriyan Kumarasamy
2a5e21adc71b46beec9232cc6418676fd2255bc5 in linux 4.19.y/4.19.67
c7990daebe71d11a9e360b5c3b0ecd1846a3a4bb in mainline linux
| -rw-r--r-- | sys/dev/pci/drm/amd/display/dc/dce/dce_abm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/dev/pci/drm/amd/display/dc/dce/dce_abm.c b/sys/dev/pci/drm/amd/display/dc/dce/dce_abm.c index 070ab56a8ac..da8b198538e 100644 --- a/sys/dev/pci/drm/amd/display/dc/dce/dce_abm.c +++ b/sys/dev/pci/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) |