[Intel-gfx] [PATCH 1/9] drm: Add mode_config .get_format_info() hook

[Daniel Vetter]

On Wed, Jan 04, 2017 at 07:15:34PM -0800, Ben Widawsky wrote:
> On 17-01-04 20:42:24, Ville Syrjälä wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Allow drivers to return a custom drm_format_info structure for special
> > fb layouts. We'll use this for the compression control surface in i915.
> > 
> > v2: Fix drm_get_format_info() kernel doc (Laurent)
> >    Don't pass 'dev' to the new hook (Laurent)
> > 
> > Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> > Cc: Ben Widawsky <ben at bwidawsk.net>
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Ok if I still merge this throught drm-misc? Looks like the next few
patches don't need this yet, and the CCS stuff probably needs a bit more
wrangling for all the pieces to be fully ready.

> > +	 *
> > +	 * RETURNS:
> > +	 *
> > +	 * The format information specific to the given fb metadata, or
> > +	 * NULL if none is found.
> > +	 */
> > +	const struct drm_format_info *(*get_format_info)(const struct drm_mode_fb_cmd2 *mode_cmd);
> > +
> > +	/**
> > 	 * @output_poll_changed:
> > 	 *
> > 	 * Callback used by helpers to inform the driver of output configuration
> 
> Looks like msm and omap could use this too, and then if you allowed mode_cmd
> to be NULL, you could potentially deprecate drm_format_info. Just a thought.

Hm, what do you mean here with deprecating drm_format_info and a NULL
mode_cmd? I don't follow at all ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch