Re: [PATCH 2/2] drm/i915/skl: Support for 90/270 rotation

["Jindal, Sonika" <sonika.jindal@intel.com>]

On 4/7/2015 1:43 PM, Daniel Vetter wrote:
> On Thu, Apr 02, 2015 at 08:59:33AM -0700, Matt Roper wrote:
>> On Thu, Apr 02, 2015 at 10:24:02AM +0530, Jindal, Sonika wrote:
>>> I am not sure how it will help. drm_plane_check_pixel_format should
>>> be used to check the pixel format of the fb which we should be doing
>>> in some -check functions (I don't think we do that right now?)
>>> against what is supported by the plane.
>>> But to check for the formats which are allowed for 90/270, we would
>>> need this kind of explicit check.
>>
>> Right, I guess there are two aspects here.  First, we need to properly
>> test for acceptable pixel formats for the plane in general; at the
>> moment the DRM core setplane() tests this, but if we use the atomic
>> ioctl it never gets checked (which is a bug).  So as you say, we need a
>> test in a _check() function to verify this.  We probably also need to
>> add an i-g-t test for it too.
>
> The core atomic ioctl does check for valid plane pixel formats for you.
> And there shouldn't be any other entrypoint (except internal ones, but
> that's ok). Is there a bug left?
>
Oh, yes the check is there. Will abandon that check then and just move 
the 90/270 pixel format check to intel_plane_atomic_check.

Regards,
Sonika
> Definitely agree that testcases would be nice.
> -Daniel
>
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