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 --- drivers/gpu/drm/sun4i/sun4i_backend.c | 22 ---------------------- drivers/gpu/drm/sun4i/sun4i_frontend.c | 23 +++++++++++++++++++++++ drivers/gpu/drm/sun4i/sun4i_frontend.h | 1 + 3 files changed, 24 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; diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c index 7c7a5ea0cf58..045013efdc57 100644 --- a/drivers/gpu/drm/sun4i/sun4i_frontend.c +++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c @@ -48,6 +48,29 @@ static const u32 sun4i_frontend_horz_coef[64] = { 0x03ff0000, 0x0000fd41, 0x01ff0000, 0x0000fe42, };
+/* + * 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. + */ +const u32 sunxi_bt601_yuv2rgb_coef[12] = { + 0x000004a7, 0x00001e6f, 0x00001cbf, 0x00000877, + 0x000004a7, 0x00000000, 0x00000662, 0x00003211, + 0x000004a7, 0x00000812, 0x00000000, 0x00002eb1, +}; +EXPORT_SYMBOL(sunxi_bt601_yuv2rgb_coef); + static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend) { int i; diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.h b/drivers/gpu/drm/sun4i/sun4i_frontend.h index ad146e8d8d70..3df2bd8a7a95 100644 --- a/drivers/gpu/drm/sun4i/sun4i_frontend.h +++ b/drivers/gpu/drm/sun4i/sun4i_frontend.h @@ -86,6 +86,7 @@ struct sun4i_frontend { };
extern const struct of_device_id sun4i_frontend_of_table[]; +extern const u32 sunxi_bt601_yuv2rgb_coef[12];
int sun4i_frontend_init(struct sun4i_frontend *frontend); void sun4i_frontend_exit(struct sun4i_frontend *frontend);