[igt-dev] [PATCH i-g-t] tests/pm_rpm: Don't try to create an X-tiled ARGB8888 framebuffer

[Chris Wilson]

Quoting Ville Syrjala (2018-03-09 20:43:08)
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> On most platforms ARGB8888 is only supported by the cursor plane,
> which doesn't support tiled buffers. Hence the kernel is under no
> obligation to accept the request to create a tiled ARGB888
> framebuffer. Apparently we've been letting this slip through so
> far, but that is about to change.
> 
> Fortunately the resulting fb was neer actually used (in fact the
> kernel would have rejected the setplane/atomic ioctl with such
> a framebuffer). All we're really interested here is the gem BO
> which we feed to the kernel via the setcursor ioctl after changing
> the tiling to linear. To avoid changing the test drastically we
> can simply change the fb to XRGB8888, which combined with X-tiling
> is supported on all platforms.

Yup, XRGB can be used for cursor as well as all the other planes, so no
loss of generality (and as stated much gained!).

> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris