The patch below does not apply to the 6.7-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-6.7.y git checkout FETCH_HEAD git cherry-pick -x 3ba2a0bfd8cf94eb225e1c60dff16e5c35bde1da # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024012741-tulip-enhance-9750@gregkh' --subject-prefix 'PATCH 6.7.y' HEAD^..

Possible dependencies:

3ba2a0bfd8cf ("drm/amd/display: Clear OPTC mem select on disable") 7bdbfb4e36e3 ("drm/amd/display: Disconnect phantom pipe OPP from OPTC being disabled") e7b2b108cdea ("drm/amd/display: Fix hang/underflow when transitioning to ODM4:1")

thanks,

greg k-h

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

From 3ba2a0bfd8cf94eb225e1c60dff16e5c35bde1da Mon Sep 17 00:00:00 2001 From: Ilya Bakoulin ilya.bakoulin@amd.com Date: Wed, 3 Jan 2024 09:42:04 -0500 Subject: [PATCH] drm/amd/display: Clear OPTC mem select on disable

[Why] Not clearing the memory select bits prior to OPTC disable can cause DSC corruption issues when attempting to reuse a memory instance for another OPTC that enables ODM.

[How] Clear the memory select bits prior to disabling an OPTC.

Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Reviewed-by: Charlene Liu charlene.liu@amd.com Acked-by: Alex Hung alex.hung@amd.com Signed-off-by: Ilya Bakoulin ilya.bakoulin@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/optc/dcn32/dcn32_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c index 1788eb29474b..823493543325 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c @@ -173,6 +173,9 @@ static bool optc32_disable_crtc(struct timing_generator *optc) OPTC_SEG3_SRC_SEL, 0xf, OPTC_NUM_OF_INPUT_SEGMENT, 0);

+ REG_UPDATE(OPTC_MEMORY_CONFIG, + OPTC_MEM_SEL, 0); + /* disable otg request until end of the first line * in the vertical blank region */ diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c index 3d6c1b2c2b4d..5b1547508850 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c @@ -145,6 +145,9 @@ static bool optc35_disable_crtc(struct timing_generator *optc) OPTC_SEG3_SRC_SEL, 0xf, OPTC_NUM_OF_INPUT_SEGMENT, 0);

+ REG_UPDATE(OPTC_MEMORY_CONFIG, + OPTC_MEM_SEL, 0); + /* disable otg request until end of the first line * in the vertical blank region */