drm/i915: Use fb->pitches[0] in cursor code
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Mon, 27 Mar 2017 18:55:41 +0000 (21:55 +0300)
committerVille Syrjälä <ville.syrjala@linux.intel.com>
Wed, 10 May 2017 16:28:33 +0000 (19:28 +0300)
commit1e1bb8710e6018e932d18f9064d815634e3179f8
tree14b41dccbd3568ea0413f142b2a00f695cc8b9f8
parent3637ecf095c80f3d19947d8af41869289f71ef1c
drm/i915: Use fb->pitches[0] in cursor code

The cursor code currently ignores fb->pitches[0] (except when creating
the fb itself), and just uses the cursor_width*4 as the stride. Let's
make sure fb->pitches[0] actually matches what we expect it to be.

We can also relax the stride vs. cursor width relationship on 845/865
since the stride is programmed separately. The only constraint is that
width*cpp doesn't exceed the stride, and that's already been checked
by the core since it makes sure the entire plane fits within the fb.

We can also drop the bo size check as that's already checked when
we create the fb. That is the fb is guaranteed to fit within the bo.

v2: Rebase due to i845_cursor_ctl() and i9xx_cursor_ctl()

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
Link: http://patchwork.freedesktop.org/patch/msgid/20170327185546.2977-11-ville.syrjala@linux.intel.com
drivers/gpu/drm/i915/intel_display.c