FAILED: patch "[PATCH] drm/amd/display: Fix encoder disable logic" 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 0ee057e66c4b782809a0a9265cdac5542e646706
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2023112431-saga-deflector-404c@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

0ee057e66c4b ("drm/amd/display: Fix encoder disable logic") e0b394a87a11 ("drm/amd/display: Add DCN35 DIO")

thanks,

greg k-h

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

From 0ee057e66c4b782809a0a9265cdac5542e646706 Mon Sep 17 00:00:00 2001
From: Nicholas Susanto <[email protected]>
Date: Wed, 1 Nov 2023 15:30:10 -0400
Subject: [PATCH] drm/amd/display: Fix encoder disable logic

[WHY]
DENTIST hangs when OTG is off and encoder is on. We were not disabling the encoder properly when switching from extended mode to external monitor only.

[HOW]
Disable the encoder using an existing enable/disable fifo helper instead of enc35_stream_encoder_enable.

index 001f9eb66920..62a8f0b56006 100644
@@ -261,12 +261,6 @@ static void enc35_stream_encoder_enable(
 			/* invalid mode ! */
 			ASSERT_CRITICAL(false);
 		}
-
-		REG_UPDATE(DIG_FE_CLK_CNTL, DIG_FE_CLK_EN, 1);
-		REG_UPDATE(DIG_FE_EN_CNTL, DIG_FE_ENABLE, 1);
-	} else {
-		REG_UPDATE(DIG_FE_EN_CNTL, DIG_FE_ENABLE, 0);
-		REG_UPDATE(DIG_FE_CLK_CNTL, DIG_FE_CLK_EN, 0);
 	}
 }
 

@@ -436,6 +430,8 @@ static void enc35_disable_fifo(struct stream_encoder *enc)
 	struct dcn10_stream_encoder *enc1 = DCN10STRENC_FROM_STRENC(enc);
 
 	REG_UPDATE(DIG_FIFO_CTRL0, DIG_FIFO_ENABLE, 0);
+	REG_UPDATE(DIG_FE_EN_CNTL, DIG_FE_ENABLE, 0);
+	REG_UPDATE(DIG_FE_CLK_CNTL, DIG_FE_CLK_EN, 0);
 }
 
 static void enc35_enable_fifo(struct stream_encoder *enc)

@@ -443,6 +439,8 @@ static void enc35_enable_fifo(struct stream_encoder *enc)
 	struct dcn10_stream_encoder *enc1 = DCN10STRENC_FROM_STRENC(enc);
 
 	REG_UPDATE(DIG_FIFO_CTRL0, DIG_FIFO_READ_START_LEVEL, 0x7);
+	REG_UPDATE(DIG_FE_CLK_CNTL, DIG_FE_CLK_EN, 1);
+	REG_UPDATE(DIG_FE_EN_CNTL, DIG_FE_ENABLE, 1);
 
 	enc35_reset_fifo(enc, true);
 	enc35_reset_fifo(enc, false);