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drm: More links for gamma support helpers

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It's not obvious that when using the new color manager stuff you still
need to wire up the legacy helper to get legacy LUT support. Improve
this with more links. drm_crtc_funcs->gamma_set already explains this
properly.

Cc: Peter Rosin <peda@axentia.se>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170620094228.4757-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2017-06-20 11:42:28 +02:00
parent c50a115b6e
commit d7b66de513
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_color_mgmt.c
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@ -128,6 +128,9 @@ EXPORT_SYMBOL(drm_color_lut_extract);
* optional. The gamma and degamma properties are only attached if
* their size is not 0 and ctm_property is only attached if has_ctm is
* true.
*
* Drivers should use drm_atomic_helper_legacy_gamma_set() to implement the
* legacy &drm_crtc_funcs.gamma_set callback.
*/
void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
uint degamma_lut_size,