FAILED: patch "[PATCH] drm/amd/display: Include udelay when waiting for INBOX0 ACK" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 1c22d6ce53280763bcb4cb24d4f71111fff4a526
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024012735-arming-childless-3574@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

1c22d6ce5328 ("drm/amd/display: Include udelay when waiting for INBOX0 ACK")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 1c22d6ce53280763bcb4cb24d4f71111fff4a526 Mon Sep 17 00:00:00 2001
From: Alvin Lee <[email protected]>
Date: Mon, 6 Nov 2023 11:20:15 -0500
Subject: [PATCH] drm/amd/display: Include udelay when waiting for INBOX0 ACK

When waiting for the ACK for INBOX0 message,
we have to ensure to include the udelay
for proper wait time

index 22fc4ba96def..38360adc53d9 100644
@@ -1077,6 +1077,7 @@ enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t ti
 		ack = dmub->hw_funcs.read_inbox0_ack_register(dmub);
 		if (ack)
 			return DMUB_STATUS_OK;
+		udelay(1);
 	}
 	return DMUB_STATUS_TIMEOUT;
 }