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drm: add docs about the IN_FORMATS plane property

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This is a standard property attached to planes in drm_universal_plane_init
when drm_mode_config.allow_fb_modifiers is true.

Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Daniel Stone <daniel@fooishbar.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/mHOtz80Wa-x3A5Lz5ETTM65VUMfW1j6b-iCuvIy1RzOM1EloHPqAb2MnbU8ygZi0ABaLrxuN6pzu0v3QRn83125C0bXuHoo-DQWWEd80fdw=@emersion.fr
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Simon Ser 2020-03-29 14:45:08 +00:00 committed by Daniel Vetter
parent c7da606eda
commit e6219defd3
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/drm_blend.c
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@ -183,6 +183,12 @@
* plane does not expose the "alpha" property, then this is
* assumed to be 1.0
*
* IN_FORMATS:
* Blob property which contains the set of buffer format and modifier
* pairs supported by this plane. The blob is a drm_format_modifier_blob
* struct. Without this property the plane doesn't support buffers with
* modifiers. Userspace cannot change this property.
*
* Note that all the property extensions described here apply either to the
* plane or the CRTC (e.g. for the background color, which currently is not
* exposed and assumed to be black).