drm/amd/display: Reset OUTBOX0 r/w pointer on DMUB reset

[ Upstream commit 425afa0 ] [Why & How] We missed resetting OUTBOX0 mailbox r/w pointer on DMUB reset. Fix it. Fixes: 6ecf977 ("drm/amd/display: Fix DMUB outbox trace in S4 (#4465)") Signed-off-by: Cruise Hung <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
LockitNetwork · May 17, 2023 · ccb0ad9 · ccb0ad9
1 parent bb13726
commit ccb0ad9
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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);
 }