From d7b66de513179065408908a79cfbe3a11a15e6eb Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 20 Jun 2017 11:42:28 +0200 Subject: [PATCH] drm: More links for gamma support helpers 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 Cc: Boris Brezillon Reviewed-by: Boris Brezillon Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170620094228.4757-1-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_color_mgmt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c index 3eda500fc005..fe0982708e95 100644 --- a/drivers/gpu/drm/drm_color_mgmt.c +++ b/drivers/gpu/drm/drm_color_mgmt.c @@ -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, -- 2.20.1