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 <stable@xxxxxxxxxxxxxxx>. 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 '<stable@xxxxxxxxxxxxxxx>' --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 <alvin.lee2@xxxxxxx> 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 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> diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index 22fc4ba96def..38360adc53d9 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -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; }
