drm/amd/display: enable cursor degamma for DCN3+ DRM legacy gamma

From Melissa Wen
e1769b1dfcaebb7e4272528fa2f198c6549f619b in linux-6.1.y/6.1.54
57a943ebfcdb4a97fbb409640234bdb44bfa1953 in mainline linux

diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index 3c50b3f..cd6e99c 100644 (file)
--- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1269,6 +1269,13 @@ void 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) {