Re: [Intel-gfx] [PATCH 1/3] drm/i915: Don't set mode_config's cursor size

On Tue, Mar 25, 2014 at 07:23:26PM +0100, Daniel Vetter wrote:

Or we simply do this per-pixel format with one for each framebuffer plane, i.e.

struct drm_get_plane_fb_limits { uint32_t plane_id; /* in */ uint32_t fourcc; /* in */ struct drm_plane_limits limits[MAX_FOURCC_PLANES]; /* the stuff above for all possible planes of a fourcc code */ }

Saner drivers could then return the same thing for all fourccs codes in their backend.

Some of the limits are definitely per format. Plane max dimensions are a good example of a limit that can change per-format (8bpp Vs 10bpp to be contained within the same max bandwidth of the hw).