The patch below does not apply to the 5.10-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-5.10.y git checkout FETCH_HEAD git cherry-pick -x 57a943ebfcdb4a97fbb409640234bdb44bfa1953 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023091622-outpost-audio-2222@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

57a943ebfcdb ("drm/amd/display: enable cursor degamma for DCN3+ DRM legacy gamma") 5d945cbcd4b1 ("drm/amd/display: Create a file dedicated to planes") 60693e3a3890 ("Merge tag 'amd-drm-next-5.20-2022-07-14' of https://gitlab.freedesktop.org/agd5f/linux into drm-next")

thanks,

greg k-h

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

From 57a943ebfcdb4a97fbb409640234bdb44bfa1953 Mon Sep 17 00:00:00 2001 From: Melissa Wen mwen@igalia.com Date: Thu, 31 Aug 2023 15:12:28 -0100 Subject: [PATCH] drm/amd/display: enable cursor degamma for DCN3+ DRM legacy gamma

For DRM legacy gamma, AMD display manager applies implicit sRGB degamma using a pre-defined sRGB transfer function. It works fine for DCN2 family where degamma ROM and custom curves go to the same color block. But, on DCN3+, degamma is split into two blocks: degamma ROM for pre-defined TFs and `gamma correction` for user/custom curves and degamma ROM settings doesn't apply to cursor plane. To get DRM legacy gamma working as expected, enable cursor degamma ROM for implict sRGB degamma on HW with this configuration.

Cc: stable@vger.kernel.org Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2803 Fixes: 96b020e2163f ("drm/amd/display: check attr flag before set cursor degamma on DCN3+") Signed-off-by: Melissa Wen mwen@igalia.com Signed-off-by: Alex Deucher alexander.deucher@amd.com

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c index 2198df96ed6f..cc74dd69acf2 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c @@ -1269,6 +1269,13 @@ void amdgpu_dm_plane_handle_cursor_update(struct drm_plane *plane, attributes.rotation_angle = 0; attributes.attribute_flags.value = 0;

+ /* Enable cursor degamma ROM on DCN3+ for implicit sRGB degamma in DRM + * legacy gamma setup. + */ + if (crtc_state->cm_is_degamma_srgb && + adev->dm.dc->caps.color.dpp.gamma_corr) + attributes.attribute_flags.bits.ENABLE_CURSOR_DEGAMMA = 1; + attributes.pitch = afb->base.pitches[0] / afb->base.format->cpp[0];

if (crtc_state->stream) {