Patch "drm/amd/display: Reset OUTBOX0 r/w pointer on DMUB reset" has been added to the 6.2-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

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

to the 6.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-reset-outbox0-r-w-pointer-on-dmub-re.patch
and it can be found in the queue-6.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 2e91a87bbe1b786ca45948185ead58966183982f
Author: Cruise Hung <Cruise.Hung@xxxxxxx>
Date:   Fri May 13 09:16:42 2022 +0800

    drm/amd/display: Reset OUTBOX0 r/w pointer on DMUB reset
    
    [ 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@xxxxxxx>
    Acked-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
    Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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);
 }