FAILED: patch "[PATCH] drm/amd/display: Adjust reg field for DSC wait for disconnect" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-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@vger.kernel.org>.

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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 569d7db70e5dcf13fbf072f10e9096577ac1e565
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024081211-whacking-visa-8ff1@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

569d7db70e5d ("drm/amd/display: Adjust reg field for DSC wait for disconnect")
176278d8bff2 ("drm/amd/display: reset DSC clock in post unlock update")
0127f0445f7c ("drm/amd/display: Refactor input mode programming for DIG FIFO")
e6a901a00822 ("drm/amd/display: use even ODM slice width for two pixels per container")
532a0d2ad292 ("drm/amd/display: Revert "dc: Keep VBios pixel rate div setting util next mode set"")
47745acc5e8d ("drm/amd/display: Add trigger FIFO resync path for DCN35")
4d4d3ff16db2 ("drm/amd/display: Keep VBios pixel rate div setting util next mode set")
70839da63605 ("drm/amd/display: Add new DCN401 sources")
9712b64d6f3f ("drm/amd/display: Remove MPC rate control logic from DCN30 and above")
eed4edda910f ("drm/amd/display: Support long vblank feature")
2d7f3d1a5866 ("drm/amd/display: Implement wait_for_odm_update_pending_complete")
c7b33856139d ("drm/amd/display: Drop some unnecessary guards")
6a068e64fb25 ("drm/amd/display: Update phantom pipe enable / disable sequence")
db8391479f44 ("drm/amd/display: correct static screen event mask")
4ba9ca63e696 ("drm/amd/display: Fix dcn35 8k30 Underflow/Corruption Issue")
9af68235ad3d ("drm/amd/display: Fix static screen event mask definition change")
f6154d8babbb ("drm/amd/display: Refactor INIT into component folder")
a71e1310a43f ("drm/amd/display: Add more mechanisms for tests")
85fce153995e ("drm/amd/display: change static screen wait frame_count for ips")
09a4ec5da92c ("drm/amd/display: Refactor dc_state interface")

thanks,

greg k-h

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

From 569d7db70e5dcf13fbf072f10e9096577ac1e565 Mon Sep 17 00:00:00 2001
From: Ryan Seto <ryanseto@amd.com>
Date: Fri, 14 Jun 2024 14:56:15 -0400
Subject: [PATCH] drm/amd/display: Adjust reg field for DSC wait for disconnect

[WHY]
DSC was waiting for the wrong field to disconnect cleanly.

[HOW]
Changed field the DSC disconnect was waiting on.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ryan Seto <ryanseto@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dcn20/dcn20_dsc.h b/drivers/gpu/drm/amd/display/dc/dsc/dcn20/dcn20_dsc.h
index a23308a785bc..1fb90b52b814 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dcn20/dcn20_dsc.h
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dcn20/dcn20_dsc.h
@@ -454,7 +454,9 @@
 	type DSCCIF_UPDATE_TAKEN_ACK; \
 	type DSCRM_DSC_FORWARD_EN; \
 	type DSCRM_DSC_OPP_PIPE_SOURCE; \
-	type DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING
+	type DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING; \
+	type DSCRM_DSC_FORWARD_EN_STATUS
+
 
 struct dcn20_dsc_registers {
 	uint32_t DSC_TOP_CONTROL;
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.c
index 52f23bb554af..6acb6699f146 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.c
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.c
@@ -208,7 +208,7 @@ static void dsc401_wait_disconnect_pending_clear(struct display_stream_compresso
 {
 	struct dcn401_dsc *dsc401 = TO_DCN401_DSC(dsc);
 
-	REG_WAIT(DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_DOUBLE_BUFFER_REG_UPDATE_PENDING, 0, 2, 50000);
+	REG_WAIT(DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN_STATUS, 0, 2, 50000);
 }
 
 static void dsc401_disconnect(struct display_stream_compressor *dsc)
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.h b/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.h
index 2143e81ca22a..3c9fa8988974 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.h
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dcn401/dcn401_dsc.h
@@ -196,7 +196,8 @@
 	DSC2_SF(DSCCIF0, DSCCIF_CONFIG0__BITS_PER_COMPONENT, mask_sh), \
 	DSC_SF(DSCCIF0_DSCCIF_CONFIG0, DOUBLE_BUFFER_REG_UPDATE_PENDING, mask_sh), \
 	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN, mask_sh), \
-	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_OPP_PIPE_SOURCE, mask_sh)
+	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_OPP_PIPE_SOURCE, mask_sh), \
+	DSC_SF(DSCRM0_DSCRM_DSC_FORWARD_CONFIG, DSCRM_DSC_FORWARD_EN_STATUS, mask_sh)
 
 struct dcn401_dsc_registers {
 	uint32_t DSC_TOP_CONTROL;