443 lines
11 KiB
C
443 lines
11 KiB
C
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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 = MEDIA_BUS_FMT_BGR888_1X24,
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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 = MEDIA_BUS_FMT_RGB888_1X24,
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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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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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EXPORT_SYMBOL_GPL(vimc_pix_map_by_index);
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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;
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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].code == code)
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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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EXPORT_SYMBOL_GPL(vimc_pix_map_by_code);
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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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EXPORT_SYMBOL_GPL(vimc_pix_map_by_pixelformat);
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/* Helper function to allocate and initialize pads */
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struct media_pad *vimc_pads_init(u16 num_pads, const unsigned long *pads_flag)
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{
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struct media_pad *pads;
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unsigned int i;
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/* Allocate memory for the pads */
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pads = kcalloc(num_pads, sizeof(*pads), GFP_KERNEL);
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if (!pads)
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return ERR_PTR(-ENOMEM);
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/* Initialize the pads */
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for (i = 0; i < num_pads; i++) {
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pads[i].index = i;
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pads[i].flags = pads_flag[i];
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}
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return pads;
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}
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EXPORT_SYMBOL_GPL(vimc_pads_init);
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int vimc_pipeline_s_stream(struct media_entity *ent, int enable)
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{
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struct v4l2_subdev *sd;
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struct media_pad *pad;
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unsigned int i;
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int ret;
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for (i = 0; i < ent->num_pads; i++) {
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if (ent->pads[i].flags & MEDIA_PAD_FL_SOURCE)
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continue;
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/* Start the stream in the subdevice direct connected */
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pad = media_entity_remote_pad(&ent->pads[i]);
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if (!pad)
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continue;
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if (!is_media_entity_v4l2_subdev(pad->entity))
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return -EINVAL;
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sd = media_entity_to_v4l2_subdev(pad->entity);
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ret = v4l2_subdev_call(sd, video, s_stream, enable);
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if (ret && ret != -ENOIOCTLCMD)
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(vimc_pipeline_s_stream);
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static int vimc_get_mbus_format(struct media_pad *pad,
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struct v4l2_subdev_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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int ret;
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fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
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fmt->pad = pad->index;
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ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
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if (ret)
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return ret;
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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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const struct vimc_pix_map *vpix;
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struct v4l2_pix_format vdev_fmt;
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if (!ved->vdev_get_format)
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return -ENOIOCTLCMD;
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ved->vdev_get_format(ved, &vdev_fmt);
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vpix = vimc_pix_map_by_pixelformat(vdev_fmt.pixelformat);
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v4l2_fill_mbus_format(&fmt->format, &vdev_fmt, vpix->code);
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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_link_validate(struct media_link *link)
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{
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struct v4l2_subdev_format source_fmt, sink_fmt;
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int ret;
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ret = vimc_get_mbus_format(link->source, &source_fmt);
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if (ret)
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return ret;
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ret = vimc_get_mbus_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.format.width, source_fmt.format.height,
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source_fmt.format.code, source_fmt.format.colorspace,
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source_fmt.format.quantization, source_fmt.format.xfer_func,
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source_fmt.format.ycbcr_enc,
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/* sink */
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link->sink->entity->name,
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sink_fmt.format.width, sink_fmt.format.height,
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sink_fmt.format.code, sink_fmt.format.colorspace,
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sink_fmt.format.quantization, sink_fmt.format.xfer_func,
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sink_fmt.format.ycbcr_enc);
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/* The width, height and code must match. */
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if (source_fmt.format.width != sink_fmt.format.width
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|| source_fmt.format.height != sink_fmt.format.height
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|| source_fmt.format.code != sink_fmt.format.code)
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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.format.field != sink_fmt.format.field &&
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sink_fmt.format.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.format.colorspace == V4L2_COLORSPACE_DEFAULT
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|| sink_fmt.format.colorspace == V4L2_COLORSPACE_DEFAULT)
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return 0;
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/* Colorspace must match. */
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if (source_fmt.format.colorspace != sink_fmt.format.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.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
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&& sink_fmt.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
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&& source_fmt.format.ycbcr_enc != sink_fmt.format.ycbcr_enc)
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return -EPIPE;
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if (source_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT
|
||
|
|
&& sink_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT
|
||
|
|
&& source_fmt.format.quantization != sink_fmt.format.quantization)
|
||
|
|
return -EPIPE;
|
||
|
|
|
||
|
|
if (source_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT
|
||
|
|
&& sink_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT
|
||
|
|
&& source_fmt.format.xfer_func != sink_fmt.format.xfer_func)
|
||
|
|
return -EPIPE;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vimc_link_validate);
|
||
|
|
|
||
|
|
static const struct media_entity_operations vimc_ent_sd_mops = {
|
||
|
|
.link_validate = vimc_link_validate,
|
||
|
|
};
|
||
|
|
|
||
|
|
int vimc_ent_sd_register(struct vimc_ent_device *ved,
|
||
|
|
struct v4l2_subdev *sd,
|
||
|
|
struct v4l2_device *v4l2_dev,
|
||
|
|
const char *const name,
|
||
|
|
u32 function,
|
||
|
|
u16 num_pads,
|
||
|
|
const unsigned long *pads_flag,
|
||
|
|
const struct v4l2_subdev_ops *sd_ops)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Allocate the pads */
|
||
|
|
ved->pads = vimc_pads_init(num_pads, pads_flag);
|
||
|
|
if (IS_ERR(ved->pads))
|
||
|
|
return PTR_ERR(ved->pads);
|
||
|
|
|
||
|
|
/* Fill the vimc_ent_device struct */
|
||
|
|
ved->ent = &sd->entity;
|
||
|
|
|
||
|
|
/* Initialize the subdev */
|
||
|
|
v4l2_subdev_init(sd, sd_ops);
|
||
|
|
sd->entity.function = function;
|
||
|
|
sd->entity.ops = &vimc_ent_sd_mops;
|
||
|
|
sd->owner = THIS_MODULE;
|
||
|
|
strlcpy(sd->name, name, sizeof(sd->name));
|
||
|
|
v4l2_set_subdevdata(sd, ved);
|
||
|
|
|
||
|
|
/* Expose this subdev to user space */
|
||
|
|
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
||
|
|
if (sd->ctrl_handler)
|
||
|
|
sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS;
|
||
|
|
|
||
|
|
/* Initialize the media entity */
|
||
|
|
ret = media_entity_pads_init(&sd->entity, num_pads, ved->pads);
|
||
|
|
if (ret)
|
||
|
|
goto err_clean_pads;
|
||
|
|
|
||
|
|
/* Register the subdev with the v4l2 and the media framework */
|
||
|
|
ret = v4l2_device_register_subdev(v4l2_dev, sd);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(v4l2_dev->dev,
|
||
|
|
"%s: subdev register failed (err=%d)\n",
|
||
|
|
name, ret);
|
||
|
|
goto err_clean_m_ent;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_clean_m_ent:
|
||
|
|
media_entity_cleanup(&sd->entity);
|
||
|
|
err_clean_pads:
|
||
|
|
vimc_pads_cleanup(ved->pads);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vimc_ent_sd_register);
|
||
|
|
|
||
|
|
void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd)
|
||
|
|
{
|
||
|
|
v4l2_device_unregister_subdev(sd);
|
||
|
|
media_entity_cleanup(ved->ent);
|
||
|
|
vimc_pads_cleanup(ved->pads);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vimc_ent_sd_unregister);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Common");
|
||
|
|
MODULE_AUTHOR("Helen Koike <helen.fornazier@gmail.com>");
|
||
|
|
MODULE_LICENSE("GPL");
|