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