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[v2,1/7] drm/uapi: Document CTM matrix better

Message ID 20230413164916.4221-2-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: CTM stuff mostly | expand

Commit Message

Ville Syrjälä April 13, 2023, 4:49 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Document in which order the CTM matrix elements are stored.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 include/uapi/drm/drm_mode.h | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 46becedf5b2f..43691058d28f 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -834,6 +834,11 @@  struct drm_color_ctm {
 	/*
 	 * Conversion matrix in S31.32 sign-magnitude
 	 * (not two's complement!) format.
+	 *
+	 * out   matrix    in
+	 * |R|   |0 1 2|   |R|
+	 * |G| = |3 4 5| x |G|
+	 * |B|   |6 7 8|   |B|
 	 */
 	__u64 matrix[9];
 };