This is a note to let you know that I've just added the patch titled
drm/amd/display: Include udelay when waiting for INBOX0 ACK
to the 6.6-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-include-udelay-when-waiting-for-inbox0-ack.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3c9ea68cb61bd7e5bd312c06a12adada74ff5805 Mon Sep 17 00:00:00 2001
From: Alvin Lee <alvin.lee2@xxxxxxx>
Date: Mon, 6 Nov 2023 11:20:15 -0500
Subject: drm/amd/display: Include udelay when waiting for INBOX0 ACK
From: Alvin Lee <alvin.lee2@xxxxxxx>
commit 3c9ea68cb61bd7e5bd312c06a12adada74ff5805 upstream.
When waiting for the ACK for INBOX0 message,
we have to ensure to include the udelay
for proper wait time
Cc: stable@xxxxxxxxxxxxxxx # 6.1+
Reviewed-by: Samson Tam <samson.tam@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Alvin Lee <alvin.lee2@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
@@ -997,6 +997,7 @@ enum dmub_status dmub_srv_wait_for_inbox
ack = dmub->hw_funcs.read_inbox0_ack_register(dmub);
if (ack)
return DMUB_STATUS_OK;
+ udelay(1);
}
return DMUB_STATUS_TIMEOUT;
}
Patches currently in stable-queue which might be from alvin.lee2@xxxxxxx are
queue-6.6/drm-amd-display-use-dram-speed-from-validation-for-dummy-p-state.patch
queue-6.6/drm-amd-display-include-udelay-when-waiting-for-inbox0-ack.patch
