Patch "drm/amd/display: Include udelay when waiting for INBOX0 ACK" has been added to the 6.6-stable tree

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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



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