]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
drm/i915: Drop 64bpp YUV formats from ICL+ SDR planes
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Wed, 18 Dec 2024 17:36:47 +0000 (19:36 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 17 Feb 2025 09:05:08 +0000 (10:05 +0100)
commit4b1d3186284ff015b90fa838e663e300ab163153
tree7419404de12379dd26a32dc2c2c730044b3c99bb
parentc842f22fc26eef56cc3f594f18f8af5d36e0ffa7
drm/i915: Drop 64bpp YUV formats from ICL+ SDR planes

commit c7b49506b3ba7a62335e6f666a43f67d5cd9fd1e upstream.

I'm seeing underruns with these 64bpp YUV formats on TGL.

The weird details:
- only happens on pipe B/C/D SDR planes, pipe A SDR planes
  seem fine, as do all HDR planes
- somehow CDCLK related, higher CDCLK allows for bigger plane
  with these formats without underruns. With 300MHz CDCLK I
  can only go up to 1200 pixels wide or so, with 650MHz even
  a 3840 pixel wide plane was OK
- ICL and ADL so far appear unaffected

So not really sure what's the deal with this, but bspec does
state "64-bit formats supported only on the HDR planes" so
let's just drop these formats from the SDR planes. We already
disallow 64bpp RGB formats.

Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241218173650.19782-2-ville.syrjala@linux.intel.com
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
(cherry picked from commit 35e1aacfe536d6e8d8d440cd7155366da2541ad4)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/i915/display/skl_universal_plane.c