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drm/vc4: hdmi: Add BT.2020 Support

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Even though we report that we support the BT.2020 Colorspace, we were
always using the BT.709 conversion matrices. Let's add the BT.2020 ones.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20221207-rpi-hdmi-improvements-v3-9-bdd54f66884e@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Dave Stevenson
2023-03-06 11:46:50 +01:00
committed by Maxime Ripard
parent 8297ee3f2d
commit b2751a4c5b
1 changed files with 38 additions and 0 deletions
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38
drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -1306,6 +1306,37 @@ static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt709[2][3][4] = {
},
};
/*
* Conversion between Full Range RGB and YUV using the BT.2020 Colorspace
*
* Matrices are signed 2p13 fixed point, with signed 9p6 offsets
*/
static const u16 vc5_hdmi_csc_full_rgb_to_yuv_bt2020[2][3][4] = {
{
/*
* Full Range
*
* [ 0.262700 0.678000 0.059300 0 ]
* [ -0.139630 -0.360370 0.500000 128 ]
* [ 0.500000 -0.459786 -0.040214 128 ]
*/
{ 0x0868, 0x15b2, 0x01e6, 0x0000 },
{ 0xfb89, 0xf479, 0x1000, 0x2000 },
{ 0x1000, 0xf14a, 0xfeb8, 0x2000 },
},
{
/* Limited Range
*
* [ 0.224732 0.580008 0.050729 16 ]
* [ -0.122176 -0.315324 0.437500 128 ]
* [ 0.437500 -0.402312 -0.035188 128 ]
*/
{ 0x082f, 0x1012, 0x031f, 0x0400 },
{ 0xfb48, 0xf6ba, 0x0e00, 0x2000 },
{ 0x0e00, 0xf448, 0xfdba, 0x2000 },
},
};
static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
const u16 coeffs[3][4])
{
@@ -1351,6 +1382,13 @@ static const u16
case DRM_MODE_COLORIMETRY_RGB_WIDE_FIXED:
case DRM_MODE_COLORIMETRY_RGB_WIDE_FLOAT:
return vc5_hdmi_csc_full_rgb_to_yuv_bt709[limited];
case DRM_MODE_COLORIMETRY_BT2020_CYCC:
case DRM_MODE_COLORIMETRY_BT2020_YCC:
case DRM_MODE_COLORIMETRY_BT2020_RGB:
case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65:
case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER:
return vc5_hdmi_csc_full_rgb_to_yuv_bt2020[limited];
}
}