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| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2019-08-17 08:11:33 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2019-08-17 08:11:33 +0000 |
| commit | edbe36acaf4951d7cab697800cc75cd5696357ba (patch) | |
| tree | b8b4bdd4b9f63339bb36611ed8d245decc215302 | |
| parent | 4c9a1f2cf0dcad85f9c74e32303ce5fabaa94d5b (diff) | |
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) |