The big motivation behind this patch is that the current power-of-two
granularity from igt_fb is way too big. There was more than one
occasion where I had to work around this problem on
kms_frontbuffer_tracking, and during my last workaround I was
requested to just make igt_fb use more minimal buffers.
I also need to export the size computation function so I won't need to
reimplement it inside kms_frontbuffer_tracking.
v2:
- Fix the Yf sizes (Ville).
- Don't change the Gen 2/3 behavior for both tiled and non-tiled.
v3:
- Edit the commit message, clarify that v1 was wrongly treating gen
2/3 non-tiled as tiled (Chris).
Requested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
be6f3fadaf