![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
202 lines
4.8 KiB
C
202 lines
4.8 KiB
C
// 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, <dagriego@biglakesoftware.com>
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* Dale Farnsworth, <dale@farnsworth.org>
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* Archit Taneja, <archit@ti.com>
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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 "csc.h"
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/*
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* 16 coefficients in the order:
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* a0, b0, c0, a1, b1, c1, a2, b2, c2, d0, d1, d2
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* (we may need to pass non-default values from user space later on, we might
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* need to make the coefficient struct more easy to populate)
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*/
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struct colorspace_coeffs {
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u16 sd[12];
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u16 hd[12];
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};
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/* VIDEO_RANGE: limited range, GRAPHICS_RANGE: full range */
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#define CSC_COEFFS_VIDEO_RANGE_Y2R 0
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#define CSC_COEFFS_GRAPHICS_RANGE_Y2R 1
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#define CSC_COEFFS_VIDEO_RANGE_R2Y 2
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#define CSC_COEFFS_GRAPHICS_RANGE_R2Y 3
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/* default colorspace coefficients */
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static struct colorspace_coeffs colorspace_coeffs[4] = {
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[CSC_COEFFS_VIDEO_RANGE_Y2R] = {
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{
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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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/* 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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[CSC_COEFFS_GRAPHICS_RANGE_Y2R] = {
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{
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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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/* 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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[CSC_COEFFS_VIDEO_RANGE_R2Y] = {
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{
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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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/* 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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[CSC_COEFFS_GRAPHICS_RANGE_R2Y] = {
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{
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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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/* 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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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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enum v4l2_colorspace src_colorspace,
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enum v4l2_colorspace dst_colorspace)
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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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struct colorspace_coeffs *sd_hd_coeffs;
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u16 *coeff, *end_coeff;
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enum v4l2_colorspace yuv_colorspace;
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int sel = 0;
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/*
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* support only graphics data range(full range) for now, a control ioctl
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* would be nice here
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*/
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/* Y2R */
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if (dst_colorspace == V4L2_COLORSPACE_SRGB &&
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(src_colorspace == V4L2_COLORSPACE_SMPTE170M ||
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src_colorspace == V4L2_COLORSPACE_REC709)) {
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/* Y2R */
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sel = 1;
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yuv_colorspace = src_colorspace;
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} else if ((dst_colorspace == V4L2_COLORSPACE_SMPTE170M ||
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dst_colorspace == V4L2_COLORSPACE_REC709) &&
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src_colorspace == V4L2_COLORSPACE_SRGB) {
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/* R2Y */
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sel = 3;
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yuv_colorspace = dst_colorspace;
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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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sd_hd_coeffs = &colorspace_coeffs[sel];
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/* select between SD or HD coefficients */
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if (yuv_colorspace == V4L2_COLORSPACE_SMPTE170M)
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coeff = sd_hd_coeffs->sd;
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else
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coeff = sd_hd_coeffs->hd;
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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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dev_err(&pdev->dev, "failed to ioremap\n");
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return ERR_CAST(csc->base);
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}
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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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