drm/sun4i: Move the BT.601 CSC coefficients to the frontend (e6ae40bd) · Commits · 戴 / test

drivers/gpu/drm/sun4i/sun4i_backend.c

+0 −22

Original line number	Diff line number	Diff line
		@@ -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;

+23 −0

Original line number	Diff line number	Diff line
		@@ -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;

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);