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drm/i915: Check fb stride against plane max stride
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Tue, 18 Sep 2018 14:02:43 +0000 (17:02 +0300)
committerRodrigo Vivi <rodrigo.vivi@intel.com>
Thu, 18 Oct 2018 01:23:23 +0000 (18:23 -0700)
commit3f6d5ba173da9a41c799146a3ad999da2158716a
tree8c3cee4db4e61279f2edda4491a0af6a4aeff8ae
parentca4b869240d5810ebac6b1570ad7beffcfbac2f5
drm/i915: Check fb stride against plane max stride

commit 4e0b83a567e2 ("drm/i915: Extract per-platform plane->check()
functions") removed the plane max stride check for sprite planes.
I was going to add it back when introducing GTT remapping for the
display, but after further thought it seems better to re-introduce
it separately.

So let's add the max stride check back. And let's do it in a nicer
form than what we had before and do it for all plane types (easy
now that we have the ->max_stride() plane vfunc).

Only sprite planes really need this for now since primary planes
are capable of scanning out the current max fb size we allow, and
cursors have more stringent stride checks elsewhere.

Cc: José Roberto de Souza <jose.souza@intel.com>
Fixes: 4e0b83a567e2 ("drm/i915: Extract per-platform plane->check() functions")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180918140243.12207-1-ville.syrjala@linux.intel.com
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
(cherry picked from commit fc3fed5d297b51f9e2c7d4f969c95c0d6e50ca57)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_drv.h
drivers/gpu/drm/i915/intel_sprite.c