The patch below does not apply to the 6.5-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-6.5.y git checkout FETCH_HEAD git cherry-pick -x 1101185bc50f5e45b8b89300914d9aa35a0c8cbe # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023112457-ranked-morse-c060@gregkh' --subject-prefix 'PATCH 6.5.y' HEAD^..

Possible dependencies:

1101185bc50f ("drm/amd/display: fix the ability to use lower resolution modes on eDP") 95dd6efc6bd3 ("drm/amd/display: fix mode scaling (RMX_.*)")

thanks,

greg k-h

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

From 1101185bc50f5e45b8b89300914d9aa35a0c8cbe Mon Sep 17 00:00:00 2001 From: Hamza Mahfooz hamza.mahfooz@amd.com Date: Wed, 13 Sep 2023 14:48:08 -0400 Subject: [PATCH] drm/amd/display: fix the ability to use lower resolution modes on eDP

On eDP we can receive invalid modes from dm_update_crtc_state() for entirely new streams for which drm_mode_set_crtcinfo() shouldn't be called on. So, instead of calling drm_mode_set_crtcinfo() from within create_stream_for_sink() we can instead call it from amdgpu_dm_connector_mode_valid(). Since, we are guaranteed to only call drm_mode_set_crtcinfo() for valid modes from that function (invalid modes are rejected by that callback) and that is the only user of create_validate_stream_for_sink() that we need to call drm_mode_set_crtcinfo() for (as before commit cb841d27b876 ("drm/amd/display: Always pass connector_state to stream validation"), that is the only place where create_validate_stream_for_sink()'s dm_state was NULL).

Cc: stable@vger.kernel.org Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2693 Fixes: cb841d27b876 ("drm/amd/display: Always pass connector_state to stream validation") Tested-by: Mark Broadworth mark.broadworth@amd.com Reviewed-by: Harry Wentland harry.wentland@amd.com Signed-off-by: Hamza Mahfooz hamza.mahfooz@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index c462261b3aff..ed1afbb5da78 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -6143,8 +6143,6 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,

if (recalculate_timing) drm_mode_set_crtcinfo(&saved_mode, 0); - else if (!old_stream) - drm_mode_set_crtcinfo(&mode, 0);

/* * If scaling is enabled and refresh rate didn't change @@ -6706,6 +6704,8 @@ enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connec goto fail; }

+ drm_mode_set_crtcinfo(mode, 0); + stream = create_validate_stream_for_sink(aconnector, mode, to_dm_connector_state(connector->state), NULL);