[PATCH 12/12] drm/modifiers: Enforce consistency between the cap an IN_FORMATS

[Maxime Ripard]

On Tue, Apr 13, 2021 at 11:49:03AM +0200, Daniel Vetter wrote:
> It's very confusing for userspace to have to deal with inconsistencies
> here, and some drivers screwed this up a bit. Most just ommitted the
> format list when they meant to say that only linear modifier is
> allowed, but some also meant that only implied modifiers are
> acceptable (because actually none of the planes registered supported
> modifiers).
> 
> Now that this is all done consistently across all drivers, document
> the rules and enforce it in the drm core.
> 
> Cc: Pekka Paalanen <pekka.paalanen at collabora.com>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Daniel Vetter <daniel at ffwll.ch>

Acked-by: Maxime Ripard <maxime at cerno.tech>

Maxime
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