// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* vimc-common.c Virtual Media Controller Driver
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*
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* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include "vimc-common.h"
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/*
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* NOTE: non-bayer formats need to come first (necessary for enum_mbus_code
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* in the scaler)
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*/
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static const struct vimc_pix_map vimc_pix_map_list[] = {
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/* TODO: add all missing formats */
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/* RGB formats */
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{
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.code = {
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MEDIA_BUS_FMT_BGR888_1X24,
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MEDIA_BUS_FMT_BGR888_3X8
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},
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.pixelformat = V4L2_PIX_FMT_BGR24,
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.bpp = 3,
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.bayer = false,
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},
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{
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.code = {
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MEDIA_BUS_FMT_RGB888_1X24,
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MEDIA_BUS_FMT_RGB888_2X12_BE,
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MEDIA_BUS_FMT_RGB888_2X12_LE,
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MEDIA_BUS_FMT_RGB888_3X8,
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MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
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MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
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MEDIA_BUS_FMT_RGB888_1X32_PADHI,
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MEDIA_BUS_FMT_GBR888_1X24
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},
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.pixelformat = V4L2_PIX_FMT_RGB24,
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.bpp = 3,
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.bayer = false,
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},
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{
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.code = { MEDIA_BUS_FMT_ARGB8888_1X32 },
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.pixelformat = V4L2_PIX_FMT_ARGB32,
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.bpp = 4,
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.bayer = false,
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},
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/* Bayer formats */
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{
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.code = { MEDIA_BUS_FMT_SBGGR8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SBGGR8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGBRG8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGBRG8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGRBG8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGRBG8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SRGGB8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SRGGB8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SBGGR10_1X10 },
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.pixelformat = V4L2_PIX_FMT_SBGGR10,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGBRG10_1X10 },
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.pixelformat = V4L2_PIX_FMT_SGBRG10,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGRBG10_1X10 },
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.pixelformat = V4L2_PIX_FMT_SGRBG10,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SRGGB10_1X10 },
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.pixelformat = V4L2_PIX_FMT_SRGGB10,
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.bpp = 2,
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.bayer = true,
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},
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/* 10bit raw bayer a-law compressed to 8 bits */
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{
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.code = { MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SBGGR10ALAW8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGBRG10ALAW8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGRBG10ALAW8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SRGGB10ALAW8,
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.bpp = 1,
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.bayer = true,
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},
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/* 10bit raw bayer DPCM compressed to 8 bits */
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{
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.code = { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SBGGR10DPCM8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGBRG10DPCM8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 },
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.pixelformat = V4L2_PIX_FMT_SRGGB10DPCM8,
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.bpp = 1,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SBGGR12_1X12 },
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.pixelformat = V4L2_PIX_FMT_SBGGR12,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGBRG12_1X12 },
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.pixelformat = V4L2_PIX_FMT_SGBRG12,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SGRBG12_1X12 },
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.pixelformat = V4L2_PIX_FMT_SGRBG12,
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.bpp = 2,
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.bayer = true,
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},
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{
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.code = { MEDIA_BUS_FMT_SRGGB12_1X12 },
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.pixelformat = V4L2_PIX_FMT_SRGGB12,
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.bpp = 2,
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.bayer = true,
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},
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};
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bool vimc_is_source(struct media_entity *ent)
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{
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unsigned int i;
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for (i = 0; i < ent->num_pads; i++)
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if (ent->pads[i].flags & MEDIA_PAD_FL_SINK)
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return false;
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return true;
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}
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const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
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{
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if (i >= ARRAY_SIZE(vimc_pix_map_list))
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return NULL;
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return &vimc_pix_map_list[i];
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}
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u32 vimc_mbus_code_by_index(unsigned int index)
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{
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unsigned int i, j;
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for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
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for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
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if (!vimc_pix_map_list[i].code[j])
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break;
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if (!index)
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return vimc_pix_map_list[i].code[j];
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index--;
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}
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}
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return 0;
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}
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const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
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{
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unsigned int i, j;
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for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
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for (j = 0; j < ARRAY_SIZE(vimc_pix_map_list[i].code); j++) {
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if (vimc_pix_map_list[i].code[j] == code)
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return &vimc_pix_map_list[i];
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}
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}
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return NULL;
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}
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const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(vimc_pix_map_list); i++) {
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if (vimc_pix_map_list[i].pixelformat == pixelformat)
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return &vimc_pix_map_list[i];
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}
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return NULL;
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}
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static int vimc_get_pix_format(struct media_pad *pad,
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struct v4l2_pix_format *fmt)
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{
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if (is_media_entity_v4l2_subdev(pad->entity)) {
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struct v4l2_subdev *sd =
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media_entity_to_v4l2_subdev(pad->entity);
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struct v4l2_subdev_format sd_fmt;
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const struct vimc_pix_map *pix_map;
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int ret;
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sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
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sd_fmt.pad = pad->index;
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ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sd_fmt);
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if (ret)
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return ret;
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v4l2_fill_pix_format(fmt, &sd_fmt.format);
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pix_map = vimc_pix_map_by_code(sd_fmt.format.code);
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fmt->pixelformat = pix_map->pixelformat;
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} else if (is_media_entity_v4l2_video_device(pad->entity)) {
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struct video_device *vdev = container_of(pad->entity,
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struct video_device,
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entity);
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struct vimc_ent_device *ved = video_get_drvdata(vdev);
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if (!ved->vdev_get_format)
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return -ENOIOCTLCMD;
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ved->vdev_get_format(ved, fmt);
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} else {
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return -EINVAL;
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}
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return 0;
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}
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int vimc_vdev_link_validate(struct media_link *link)
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{
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struct v4l2_pix_format source_fmt, sink_fmt;
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int ret;
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ret = vimc_get_pix_format(link->source, &source_fmt);
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if (ret)
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return ret;
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ret = vimc_get_pix_format(link->sink, &sink_fmt);
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if (ret)
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return ret;
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pr_info("vimc link validate: "
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"%s:src:%dx%d (0x%x, %d, %d, %d, %d) "
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"%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n",
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/* src */
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link->source->entity->name,
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source_fmt.width, source_fmt.height,
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source_fmt.pixelformat, source_fmt.colorspace,
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source_fmt.quantization, source_fmt.xfer_func,
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source_fmt.ycbcr_enc,
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/* sink */
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link->sink->entity->name,
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sink_fmt.width, sink_fmt.height,
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sink_fmt.pixelformat, sink_fmt.colorspace,
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sink_fmt.quantization, sink_fmt.xfer_func,
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sink_fmt.ycbcr_enc);
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/* The width, height and pixelformat must match. */
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if (source_fmt.width != sink_fmt.width ||
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source_fmt.height != sink_fmt.height ||
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source_fmt.pixelformat != sink_fmt.pixelformat)
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return -EPIPE;
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/*
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* The field order must match, or the sink field order must be NONE
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* to support interlaced hardware connected to bridges that support
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* progressive formats only.
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*/
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if (source_fmt.field != sink_fmt.field &&
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sink_fmt.field != V4L2_FIELD_NONE)
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return -EPIPE;
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/*
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* If colorspace is DEFAULT, then assume all the colorimetry is also
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* DEFAULT, return 0 to skip comparing the other colorimetry parameters
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*/
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if (source_fmt.colorspace == V4L2_COLORSPACE_DEFAULT ||
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sink_fmt.colorspace == V4L2_COLORSPACE_DEFAULT)
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return 0;
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/* Colorspace must match. */
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if (source_fmt.colorspace != sink_fmt.colorspace)
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return -EPIPE;
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/* Colorimetry must match if they are not set to DEFAULT */
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if (source_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
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sink_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT &&
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source_fmt.ycbcr_enc != sink_fmt.ycbcr_enc)
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return -EPIPE;
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if (source_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
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sink_fmt.quantization != V4L2_QUANTIZATION_DEFAULT &&
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source_fmt.quantization != sink_fmt.quantization)
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return -EPIPE;
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if (source_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
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sink_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT &&
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source_fmt.xfer_func != sink_fmt.xfer_func)
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return -EPIPE;
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return 0;
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}
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static const struct media_entity_operations vimc_ent_sd_mops = {
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.link_validate = v4l2_subdev_link_validate,
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};
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int vimc_ent_sd_register(struct vimc_ent_device *ved,
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struct v4l2_subdev *sd,
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struct v4l2_device *v4l2_dev,
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const char *const name,
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u32 function,
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u16 num_pads,
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struct media_pad *pads,
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const struct v4l2_subdev_ops *sd_ops)
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{
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int ret;
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/* Fill the vimc_ent_device struct */
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ved->ent = &sd->entity;
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/* Initialize the subdev */
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v4l2_subdev_init(sd, sd_ops);
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sd->entity.function = function;
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sd->entity.ops = &vimc_ent_sd_mops;
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sd->owner = THIS_MODULE;
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strscpy(sd->name, name, sizeof(sd->name));
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v4l2_set_subdevdata(sd, ved);
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/* Expose this subdev to user space */
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sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
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if (sd->ctrl_handler)
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sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
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/* Initialize the media entity */
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ret = media_entity_pads_init(&sd->entity, num_pads, pads);
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if (ret)
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return ret;
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/* Register the subdev with the v4l2 and the media framework */
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ret = v4l2_device_register_subdev(v4l2_dev, sd);
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if (ret) {
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dev_err(v4l2_dev->dev,
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"%s: subdev register failed (err=%d)\n",
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name, ret);
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goto err_clean_m_ent;
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}
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return 0;
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err_clean_m_ent:
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media_entity_cleanup(&sd->entity);
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return ret;
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}
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