diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/media/platform/ti/vpe/csc.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/drivers/media/platform/ti/vpe/csc.c b/drivers/media/platform/ti/vpe/csc.c new file mode 100644 index 0000000000..ff15bc589f --- /dev/null +++ b/drivers/media/platform/ti/vpe/csc.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Color space converter library + * + * Copyright (c) 2013 Texas Instruments Inc. + * + * David Griego, <dagriego@biglakesoftware.com> + * Dale Farnsworth, <dale@farnsworth.org> + * Archit Taneja, <archit@ti.com> + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> + +#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)) + 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"); |