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 <p...@axentia.se>
Cc: Boris Brezillon <boris.brezil...@free-electrons.com>
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
---
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,
--
2.11.0
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