From: Cruise Hung <Cruise.Hung@xxxxxxx>
[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")
Signed-off-by: Cruise Hung <Cruise.Hung@xxxxxxx>
Acked-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
---
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 568a2702d5f7..b45ac31ba555 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn32.c
@@ -126,6 +126,8 @@ 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);
/* Clear the GPINT command manually so we don't reset again. */
--
2.34.1
