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[0/4] drm/i915/fb: Deal with Mesa clear color alignment regression

Message ID 20241129065014.8363-1-ville.syrjala@linux.intel.com (mailing list archive)
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Series drm/i915/fb: Deal with Mesa clear color alignment regression | expand

Message

Ville Syrjala Nov. 29, 2024, 6:50 a.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Mesa changed its clear color alignment without informing the kernel,
and now the kernel expects 4k alignment whereas Mesa only guaratees
64 bytes. Reduce the kernel alignment requirement to the same 64 bytes
since there's no real reason for the current 4k limit. And while at it
add some missing checks and debugs to the clear color hadling.

Cc: Sagar Ghuge <sagar.ghuge@intel.com>
Cc: Nanley Chery <nanley.g.chery@intel.com>
Cc: Xi Ruoyao <xry111@xry111.site>

Ville Syrjälä (4):
  drm/i915/fb: Relax clear color alignment to 64 bytes
  drm/i915/fb: Add debug spew for misaligned CC plane
  drm/i915/fb: Check that the clear color fits within the BO
  drm/uapi/fourcc: Document the Intel clear color alignment better

 drivers/gpu/drm/i915/display/intel_fb.c | 20 +++++++++++++++---
 include/uapi/drm/drm_fourcc.h           | 27 +++++++++++++------------
 2 files changed, 31 insertions(+), 16 deletions(-)