From: Dave Stevenson <[email protected]> Even though we report that we support the BT601 Colorspace, we were always using the BT.709 conversion matrices. Let's add the BT601 ones.
Signed-off-by: Dave Stevenson <[email protected]> Reviewed-by: Thomas Zimmermann <[email protected]> Signed-off-by: Maxime Ripard <[email protected]> --- drivers/gpu/drm/vc4/vc4_hdmi.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index c74a01f97de5..5d37952d620b 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1237,6 +1237,37 @@ static const u16 vc5_hdmi_csc_full_rgb_to_rgb[2][3][4] = { }, }; +/* + * Conversion between Full Range RGB and YUV using the BT.601 Colorspace + * + * Matrices are signed 2p13 fixed point, with signed 9p6 offsets + */ +static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt601[2][3][4] = { + { + /* + * Full Range + * + * [ 0.299000 0.587000 0.114000 0 ] + * [ -0.168736 -0.331264 0.500000 128 ] + * [ 0.500000 -0.418688 -0.081312 128 ] + */ + { 0x0991, 0x12c9, 0x03a6, 0x0000 }, + { 0xfa9b, 0xf567, 0x1000, 0x2000 }, + { 0x1000, 0xf29b, 0xfd67, 0x2000 }, + }, + { + /* Limited Range + * + * [ 0.255785 0.502160 0.097523 16 ] + * [ -0.147644 -0.289856 0.437500 128 ] + * [ 0.437500 -0.366352 -0.071148 128 ] + */ + { 0x082f, 0x1012, 0x031f, 0x0400 }, + { 0xfb48, 0xf6ba, 0x0e00, 0x2000 }, + { 0x0e00, 0xf448, 0xfdba, 0x2000 }, + }, +}; + /* * Conversion between Full Range RGB and YUV using the BT.709 Colorspace * @@ -1300,6 +1331,13 @@ static const u16 (*vc5_hdmi_find_yuv_csc_coeffs(struct vc4_hdmi *vc4_hdmi, u32 colorspace, bool limited))[4] { switch (colorspace) { + case DRM_MODE_COLORIMETRY_SMPTE_170M_YCC: + case DRM_MODE_COLORIMETRY_XVYCC_601: + case DRM_MODE_COLORIMETRY_SYCC_601: + case DRM_MODE_COLORIMETRY_OPYCC_601: + case DRM_MODE_COLORIMETRY_BT601_YCC: + return vc5_hdmi_csc_full_rgb_to_yuv_bt601[limited]; + default: case DRM_MODE_COLORIMETRY_NO_DATA: case DRM_MODE_COLORIMETRY_BT709_YCC: -- 2.39.1
