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279 lines
6.8 KiB
279 lines
6.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Color space converter library |
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* |
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* Copyright (c) 2013 Texas Instruments Inc. |
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* |
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* David Griego, <[email protected]> |
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* Dale Farnsworth, <[email protected]> |
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* Archit Taneja, <[email protected]> |
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*/ |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-common.h> |
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#include "csc.h" |
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/* |
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* 12 coefficients in the order: |
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* a0, b0, c0, a1, b1, c1, a2, b2, c2, d0, d1, d2 |
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*/ |
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struct quantization { |
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u16 coeff[12]; |
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}; |
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struct colorspace { |
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struct quantization limited; |
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struct quantization full; |
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}; |
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struct encoding_direction { |
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struct colorspace r601; |
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struct colorspace r709; |
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}; |
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struct csc_coeffs { |
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struct encoding_direction y2r; |
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struct encoding_direction r2y; |
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}; |
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/* default colorspace coefficients */ |
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static struct csc_coeffs csc_coeffs = { |
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.y2r = { |
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.r601 = { |
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.limited = { |
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{ /* SDTV */ |
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0x0400, 0x0000, 0x057D, 0x0400, 0x1EA7, 0x1D35, |
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0x0400, 0x06EF, 0x1FFE, 0x0D40, 0x0210, 0x0C88, |
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} |
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}, |
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.full = { |
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{ /* SDTV */ |
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0x04A8, 0x1FFE, 0x0662, 0x04A8, 0x1E6F, 0x1CBF, |
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0x04A8, 0x0812, 0x1FFF, 0x0C84, 0x0220, 0x0BAC, |
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} |
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}, |
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}, |
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.r709 = { |
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.limited = { |
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{ /* HDTV */ |
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0x0400, 0x0000, 0x0629, 0x0400, 0x1F45, 0x1E2B, |
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0x0400, 0x0742, 0x0000, 0x0CEC, 0x0148, 0x0C60, |
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} |
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}, |
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.full = { |
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{ /* HDTV */ |
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0x04A8, 0x0000, 0x072C, 0x04A8, 0x1F26, 0x1DDE, |
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0x04A8, 0x0873, 0x0000, 0x0C20, 0x0134, 0x0B7C, |
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} |
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}, |
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}, |
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}, |
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.r2y = { |
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.r601 = { |
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.limited = { |
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{ /* SDTV */ |
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0x0132, 0x0259, 0x0075, 0x1F50, 0x1EA5, 0x020B, |
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0x020B, 0x1E4A, 0x1FAB, 0x0000, 0x0200, 0x0200, |
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} |
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}, |
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.full = { |
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{ /* SDTV */ |
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0x0107, 0x0204, 0x0064, 0x1F68, 0x1ED6, 0x01C2, |
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0x01C2, 0x1E87, 0x1FB7, 0x0040, 0x0200, 0x0200, |
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} |
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}, |
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}, |
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.r709 = { |
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.limited = { |
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{ /* HDTV */ |
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0x00DA, 0x02DC, 0x004A, 0x1F88, 0x1E6C, 0x020C, |
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0x020C, 0x1E24, 0x1FD0, 0x0000, 0x0200, 0x0200, |
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} |
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}, |
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.full = { |
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{ /* HDTV */ |
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0x00bb, 0x0275, 0x003f, 0x1f99, 0x1ea5, 0x01c2, |
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0x01c2, 0x1e67, 0x1fd7, 0x0040, 0x0200, 0x0200, |
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} |
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}, |
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}, |
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}, |
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}; |
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void csc_dump_regs(struct csc_data *csc) |
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{ |
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struct device *dev = &csc->pdev->dev; |
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#define DUMPREG(r) dev_dbg(dev, "%-35s %08x\n", #r, \ |
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ioread32(csc->base + CSC_##r)) |
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dev_dbg(dev, "CSC Registers @ %pa:\n", &csc->res->start); |
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DUMPREG(CSC00); |
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DUMPREG(CSC01); |
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DUMPREG(CSC02); |
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DUMPREG(CSC03); |
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DUMPREG(CSC04); |
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DUMPREG(CSC05); |
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#undef DUMPREG |
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} |
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EXPORT_SYMBOL(csc_dump_regs); |
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void csc_set_coeff_bypass(struct csc_data *csc, u32 *csc_reg5) |
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{ |
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*csc_reg5 |= CSC_BYPASS; |
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} |
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EXPORT_SYMBOL(csc_set_coeff_bypass); |
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/* |
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* set the color space converter coefficient shadow register values |
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*/ |
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void csc_set_coeff(struct csc_data *csc, u32 *csc_reg0, |
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struct v4l2_format *src_fmt, struct v4l2_format *dst_fmt) |
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{ |
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u32 *csc_reg5 = csc_reg0 + 5; |
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u32 *shadow_csc = csc_reg0; |
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u16 *coeff, *end_coeff; |
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const struct v4l2_pix_format *pix; |
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const struct v4l2_pix_format_mplane *mp; |
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const struct v4l2_format_info *src_finfo, *dst_finfo; |
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enum v4l2_ycbcr_encoding src_ycbcr_enc, dst_ycbcr_enc; |
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enum v4l2_quantization src_quantization, dst_quantization; |
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u32 src_pixelformat, dst_pixelformat; |
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if (V4L2_TYPE_IS_MULTIPLANAR(src_fmt->type)) { |
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mp = &src_fmt->fmt.pix_mp; |
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src_pixelformat = mp->pixelformat; |
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src_ycbcr_enc = mp->ycbcr_enc; |
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src_quantization = mp->quantization; |
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} else { |
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pix = &src_fmt->fmt.pix; |
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src_pixelformat = pix->pixelformat; |
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src_ycbcr_enc = pix->ycbcr_enc; |
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src_quantization = pix->quantization; |
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} |
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if (V4L2_TYPE_IS_MULTIPLANAR(dst_fmt->type)) { |
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mp = &dst_fmt->fmt.pix_mp; |
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dst_pixelformat = mp->pixelformat; |
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dst_ycbcr_enc = mp->ycbcr_enc; |
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dst_quantization = mp->quantization; |
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} else { |
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pix = &dst_fmt->fmt.pix; |
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dst_pixelformat = pix->pixelformat; |
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dst_ycbcr_enc = pix->ycbcr_enc; |
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dst_quantization = pix->quantization; |
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} |
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src_finfo = v4l2_format_info(src_pixelformat); |
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dst_finfo = v4l2_format_info(dst_pixelformat); |
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if (v4l2_is_format_yuv(src_finfo) && |
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v4l2_is_format_rgb(dst_finfo)) { |
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/* Y2R */ |
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/* |
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* These are not the standard default values but are |
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* set this way for historical compatibility |
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*/ |
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if (src_ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT) |
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src_ycbcr_enc = V4L2_YCBCR_ENC_601; |
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if (src_quantization == V4L2_QUANTIZATION_DEFAULT) |
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src_quantization = V4L2_QUANTIZATION_FULL_RANGE; |
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if (src_ycbcr_enc == V4L2_YCBCR_ENC_601) { |
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if (src_quantization == V4L2_QUANTIZATION_FULL_RANGE) |
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coeff = csc_coeffs.y2r.r601.full.coeff; |
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else |
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coeff = csc_coeffs.y2r.r601.limited.coeff; |
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} else if (src_ycbcr_enc == V4L2_YCBCR_ENC_709) { |
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if (src_quantization == V4L2_QUANTIZATION_FULL_RANGE) |
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coeff = csc_coeffs.y2r.r709.full.coeff; |
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else |
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coeff = csc_coeffs.y2r.r709.limited.coeff; |
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} else { |
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/* Should never reach this, but it keeps gcc happy */ |
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coeff = csc_coeffs.y2r.r601.full.coeff; |
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} |
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} else if (v4l2_is_format_rgb(src_finfo) && |
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v4l2_is_format_yuv(dst_finfo)) { |
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/* R2Y */ |
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/* |
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* These are not the standard default values but are |
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* set this way for historical compatibility |
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*/ |
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if (dst_ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT) |
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dst_ycbcr_enc = V4L2_YCBCR_ENC_601; |
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if (dst_quantization == V4L2_QUANTIZATION_DEFAULT) |
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dst_quantization = V4L2_QUANTIZATION_FULL_RANGE; |
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if (dst_ycbcr_enc == V4L2_YCBCR_ENC_601) { |
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if (dst_quantization == V4L2_QUANTIZATION_FULL_RANGE) |
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coeff = csc_coeffs.r2y.r601.full.coeff; |
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else |
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coeff = csc_coeffs.r2y.r601.limited.coeff; |
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} else if (dst_ycbcr_enc == V4L2_YCBCR_ENC_709) { |
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if (dst_quantization == V4L2_QUANTIZATION_FULL_RANGE) |
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coeff = csc_coeffs.r2y.r709.full.coeff; |
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else |
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coeff = csc_coeffs.r2y.r709.limited.coeff; |
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} else { |
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/* Should never reach this, but it keeps gcc happy */ |
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coeff = csc_coeffs.r2y.r601.full.coeff; |
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} |
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} else { |
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*csc_reg5 |= CSC_BYPASS; |
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return; |
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} |
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end_coeff = coeff + 12; |
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for (; coeff < end_coeff; coeff += 2) |
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*shadow_csc++ = (*(coeff + 1) << 16) | *coeff; |
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} |
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EXPORT_SYMBOL(csc_set_coeff); |
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struct csc_data *csc_create(struct platform_device *pdev, const char *res_name) |
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{ |
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struct csc_data *csc; |
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dev_dbg(&pdev->dev, "csc_create\n"); |
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csc = devm_kzalloc(&pdev->dev, sizeof(*csc), GFP_KERNEL); |
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if (!csc) { |
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dev_err(&pdev->dev, "couldn't alloc csc_data\n"); |
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return ERR_PTR(-ENOMEM); |
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} |
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csc->pdev = pdev; |
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csc->res = platform_get_resource_byname(pdev, IORESOURCE_MEM, |
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res_name); |
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if (csc->res == NULL) { |
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dev_err(&pdev->dev, "missing '%s' platform resources data\n", |
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res_name); |
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return ERR_PTR(-ENODEV); |
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} |
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csc->base = devm_ioremap_resource(&pdev->dev, csc->res); |
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if (IS_ERR(csc->base)) |
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return ERR_CAST(csc->base); |
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return csc; |
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} |
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EXPORT_SYMBOL(csc_create); |
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MODULE_DESCRIPTION("TI VIP/VPE Color Space Converter"); |
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MODULE_AUTHOR("Texas Instruments Inc."); |
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MODULE_LICENSE("GPL v2");
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