From: Cruise Hung Cruise.Hung@amd.com
[ Upstream commit 425afa0ac99a05b39e6cd00704fa0e3e925cee2b ]
[Why & How] We missed resetting OUTBOX0 mailbox r/w pointer on DMUB reset. Fix it.
Fixes: 6ecf9773a503 ("drm/amd/display: Fix DMUB outbox trace in S4 (#4465)") Signed-off-by: Cruise Hung Cruise.Hung@amd.com Acked-by: Aurabindo Pillai aurabindo.pillai@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 --- drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c index a76da0131addd..b0adbf783aae9 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c @@ -130,6 +130,8 @@ void dmub_dcn32_reset(struct dmub_srv *dmub) REG_WRITE(DMCUB_INBOX1_WPTR, 0); REG_WRITE(DMCUB_OUTBOX1_RPTR, 0); REG_WRITE(DMCUB_OUTBOX1_WPTR, 0); + REG_WRITE(DMCUB_OUTBOX0_RPTR, 0); + REG_WRITE(DMCUB_OUTBOX0_WPTR, 0); REG_WRITE(DMCUB_SCRATCH0, 0); }