drm: Specify a bit more the DRM_CAP_CURSOR_{WIDTH, HEIGHT} caps
Earlier this week, there was a bit of confusion about those new capabilities, to the point I think it's better to document the intention and API contract. The comment documents the current situation: - the radeon driver returns the only valid size for the hw - i915 returns the maximun cursor size - other drivers fall back to returning 64x64 The common contract is to return a valid cursor size. Cc: Sagar Kamble <sagar.a.kamble@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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