drm/sun4i: Move the BT.601 CSC coefficients to the frontend

Both the backend and the frontend need the BT.601 CSC coefficients for
YUV to RGB conversion. Since the backend has a dependency on the
frontend (and not the other way round), move the coefficients there
so that both can access them without having to duplicate them.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190118145133.21281-7-paul.kocialkowski@bootlin.com

1 files changed, 0 insertions, 22 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index bbadc2ab9f4d..892197f52557 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -45,28 +45,6 @@ static const u32 sunxi_rgb2yuv_coef[12] = {
 	0x000001c1, 0x00003e88, 0x00003fb8, 0x00000808
 };
 
-/*
- * These coefficients are taken from the A33 BSP from Allwinner.
- *
- * The first three values of each row are coded as 13-bit signed fixed-point
- * numbers, with 10 bits for the fractional part. The fourth value is a
- * constant coded as a 14-bit signed fixed-point number with 4 bits for the
- * fractional part.
- *
- * The values in table order give the following colorspace translation:
- * G = 1.164 * Y - 0.391 * U - 0.813 * V + 135
- * R = 1.164 * Y + 1.596 * V - 222
- * B = 1.164 * Y + 2.018 * U + 276
- *
- * This seems to be a conversion from Y[16:235] UV[16:240] to RGB[0:255],
- * following the BT601 spec.
- */
-static const u32 sunxi_bt601_yuv2rgb_coef[12] = {
-	0x000004a7, 0x00001e6f, 0x00001cbf, 0x00000877,
-	0x000004a7, 0x00000000, 0x00000662, 0x00003211,
-	0x000004a7, 0x00000812, 0x00000000, 0x00002eb1,
-};
-
 static void sun4i_backend_apply_color_correction(struct sunxi_engine *engine)
 {
 	int i;