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gpu: ipu-v3: ipu-ic-csc: Add support for limited range encoding

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Add support for encodings to or from limited range quantization.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2019-05-21 18:03:15 -07:00 committed by Philipp Zabel
parent f208b26e61
commit e3e4820d05
1 changed files with 166 additions and 14 deletions
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180
drivers/gpu/ipu-v3/ipu-ic-csc.c
View file

@ -10,6 +10,10 @@
#include <linux/sizes.h>
#include "ipu-prv.h"
#define QUANT_MAP(q) \
((q) == V4L2_QUANTIZATION_FULL_RANGE || \
(q) == V4L2_QUANTIZATION_DEFAULT ? 0 : 1)
/* identity matrix */
static const struct ipu_ic_csc_params identity = {
.coeff = {
@ -21,12 +25,87 @@ static const struct ipu_ic_csc_params identity = {
.scale = 2,
};
/*
* RGB full-range to RGB limited-range
*
* R_lim = 0.8588 * R_full + 16
* G_lim = 0.8588 * G_full + 16
* B_lim = 0.8588 * B_full + 16
*/
static const struct ipu_ic_csc_params rgbf2rgbl = {
.coeff = {
{ 220, 0, 0, },
{ 0, 220, 0, },
{ 0, 0, 220, },
},
.offset = { 64, 64, 64, },
.scale = 1,
};
/*
* RGB limited-range to RGB full-range
*
* R_full = 1.1644 * (R_lim - 16)
* G_full = 1.1644 * (G_lim - 16)
* B_full = 1.1644 * (B_lim - 16)
*/
static const struct ipu_ic_csc_params rgbl2rgbf = {
.coeff = {
{ 149, 0, 0, },
{ 0, 149, 0, },
{ 0, 0, 149, },
},
.offset = { -37, -37, -37, },
.scale = 2,
};
/*
* YUV full-range to YUV limited-range
*
* Y_lim = 0.8588 * Y_full + 16
* Cb_lim = 0.8784 * (Cb_full - 128) + 128
* Cr_lim = 0.8784 * (Cr_full - 128) + 128
*/
static const struct ipu_ic_csc_params yuvf2yuvl = {
.coeff = {
{ 220, 0, 0, },
{ 0, 225, 0, },
{ 0, 0, 225, },
},
.offset = { 64, 62, 62, },
.scale = 1,
.sat = true,
};
/*
* YUV limited-range to YUV full-range
*
* Y_full = 1.1644 * (Y_lim - 16)
* Cb_full = 1.1384 * (Cb_lim - 128) + 128
* Cr_full = 1.1384 * (Cr_lim - 128) + 128
*/
static const struct ipu_ic_csc_params yuvl2yuvf = {
.coeff = {
{ 149, 0, 0, },
{ 0, 146, 0, },
{ 0, 0, 146, },
},
.offset = { -37, -35, -35, },
.scale = 2,
};
static const struct ipu_ic_csc_params *rgb2rgb[] = {
&identity,
&rgbf2rgbl,
&rgbl2rgbf,
&identity,
};
static const struct ipu_ic_csc_params *yuv2yuv[] = {
&identity,
&yuvf2yuvl,
&yuvl2yuvf,
&identity,
};
/*
@ -46,6 +125,41 @@ static const struct ipu_ic_csc_params rgbf2yuvf_601 = {
.scale = 1,
};
/* BT.601 RGB full-range to YUV limited-range */
static const struct ipu_ic_csc_params rgbf2yuvl_601 = {
.coeff = {
{ 66, 129, 25, },
{ -38, -74, 112, },
{ 112, -94, -18, },
},
.offset = { 64, 512, 512, },
.scale = 1,
.sat = true,
};
/* BT.601 RGB limited-range to YUV full-range */
static const struct ipu_ic_csc_params rgbl2yuvf_601 = {
.coeff = {
{ 89, 175, 34, },
{ -50, -99, 149, },
{ 149, -125, -24, },
},
.offset = { -75, 512, 512, },
.scale = 1,
};
/* BT.601 RGB limited-range to YUV limited-range */
static const struct ipu_ic_csc_params rgbl2yuvl_601 = {
.coeff = {
{ 77, 150, 29, },
{ -44, -87, 131, },
{ 131, -110, -21, },
},
.offset = { 0, 512, 512, },
.scale = 1,
.sat = true,
};
/*
* BT.601 YUV full-range to RGB full-range
*
@ -69,39 +183,77 @@ static const struct ipu_ic_csc_params yuvf2rgbf_601 = {
.scale = 2,
};
/* BT.601 YUV full-range to RGB limited-range */
static const struct ipu_ic_csc_params yuvf2rgbl_601 = {
.coeff = {
{ 110, 0, 154, },
{ 110, -38, -78, },
{ 110, 195, 0, },
},
.offset = { -276, 265, -358, },
.scale = 2,
};
/* BT.601 YUV limited-range to RGB full-range */
static const struct ipu_ic_csc_params yuvl2rgbf_601 = {
.coeff = {
{ 75, 0, 102, },
{ 75, -25, -52, },
{ 75, 129, 0, },
},
.offset = { -223, 136, -277, },
.scale = 3,
};
/* BT.601 YUV limited-range to RGB limited-range */
static const struct ipu_ic_csc_params yuvl2rgbl_601 = {
.coeff = {
{ 128, 0, 175, },
{ 128, -43, -89, },
{ 128, 222, 0, },
},
.offset = { -351, 265, -443, },
.scale = 2,
};
static const struct ipu_ic_csc_params *rgb2yuv_601[] = {
&rgbf2yuvf_601,
&rgbf2yuvl_601,
&rgbl2yuvf_601,
&rgbl2yuvl_601,
};
static const struct ipu_ic_csc_params *yuv2rgb_601[] = {
&yuvf2rgbf_601,
&yuvf2rgbl_601,
&yuvl2rgbf_601,
&yuvl2rgbl_601,
};
static int calc_csc_coeffs(struct ipu_ic_csc *csc)
{
const struct ipu_ic_csc_params **params_tbl;
int tbl_idx;
if (csc->out_cs.enc != V4L2_YCBCR_ENC_601)
return -ENOTSUPP;
if ((csc->in_cs.cs == IPUV3_COLORSPACE_YUV &&
csc->in_cs.quant != V4L2_QUANTIZATION_FULL_RANGE) ||
(csc->out_cs.cs == IPUV3_COLORSPACE_YUV &&
csc->out_cs.quant != V4L2_QUANTIZATION_FULL_RANGE))
return -ENOTSUPP;
if ((csc->in_cs.cs == IPUV3_COLORSPACE_RGB &&
csc->in_cs.quant != V4L2_QUANTIZATION_FULL_RANGE) ||
(csc->out_cs.cs == IPUV3_COLORSPACE_RGB &&
csc->out_cs.quant != V4L2_QUANTIZATION_FULL_RANGE))
return -ENOTSUPP;
tbl_idx = (QUANT_MAP(csc->in_cs.quant) << 1) |
QUANT_MAP(csc->out_cs.quant);
if (csc->in_cs.cs == csc->out_cs.cs) {
csc->params = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
*yuv2yuv[0] : *rgb2rgb[0];
*yuv2yuv[tbl_idx] : *rgb2rgb[tbl_idx];
return 0;
}
csc->params = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
*yuv2rgb_601[0] : *rgb2yuv_601[0];
/* YUV <-> RGB encoding is required */
params_tbl = (csc->in_cs.cs == IPUV3_COLORSPACE_YUV) ?
yuv2rgb_601 : rgb2yuv_601;
csc->params = *params_tbl[tbl_idx];
return 0;
}