// SPDX-License-Identifier: GPL-2.0+
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/*
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* TI OMAP4 ISS V4L2 Driver - Generic video node
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*
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* Copyright (C) 2012 Texas Instruments, Inc.
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*
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* Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
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*/
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#include <linux/clk.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-mc.h>
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#include <asm/cacheflush.h>
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#include "iss_video.h"
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#include "iss.h"
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/* -----------------------------------------------------------------------------
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* Helper functions
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*/
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static struct iss_format_info formats[] = {
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{ MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
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MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8,
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V4L2_PIX_FMT_GREY, 8, },
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{ MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10,
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MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8,
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V4L2_PIX_FMT_Y10, 10, },
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{ MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10,
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MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8,
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V4L2_PIX_FMT_Y12, 12, },
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{ MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
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MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8,
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V4L2_PIX_FMT_SBGGR8, 8, },
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{ MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
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MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8,
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V4L2_PIX_FMT_SGBRG8, 8, },
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{ MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
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MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8,
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V4L2_PIX_FMT_SGRBG8, 8, },
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{ MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
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MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8,
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V4L2_PIX_FMT_SRGGB8, 8, },
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{ MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
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MEDIA_BUS_FMT_SGRBG10_1X10, 0,
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V4L2_PIX_FMT_SGRBG10DPCM8, 8, },
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{ MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10,
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MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8,
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V4L2_PIX_FMT_SBGGR10, 10, },
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{ MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10,
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MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8,
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V4L2_PIX_FMT_SGBRG10, 10, },
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{ MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10,
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MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8,
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V4L2_PIX_FMT_SGRBG10, 10, },
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{ MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10,
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MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8,
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V4L2_PIX_FMT_SRGGB10, 10, },
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{ MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10,
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MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8,
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V4L2_PIX_FMT_SBGGR12, 12, },
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{ MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10,
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MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8,
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V4L2_PIX_FMT_SGBRG12, 12, },
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{ MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10,
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MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8,
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V4L2_PIX_FMT_SGRBG12, 12, },
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{ MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10,
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MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8,
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V4L2_PIX_FMT_SRGGB12, 12, },
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{ MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16,
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MEDIA_BUS_FMT_UYVY8_1X16, 0,
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V4L2_PIX_FMT_UYVY, 16, },
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{ MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16,
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MEDIA_BUS_FMT_YUYV8_1X16, 0,
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V4L2_PIX_FMT_YUYV, 16, },
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{ MEDIA_BUS_FMT_YUYV8_1_5X8, MEDIA_BUS_FMT_YUYV8_1_5X8,
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MEDIA_BUS_FMT_YUYV8_1_5X8, 0,
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V4L2_PIX_FMT_NV12, 8, },
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};
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const struct iss_format_info *
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omap4iss_video_format_info(u32 code)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(formats); ++i) {
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if (formats[i].code == code)
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return &formats[i];
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}
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return NULL;
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}
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/*
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* iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format
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* @video: ISS video instance
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* @mbus: v4l2_mbus_framefmt format (input)
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* @pix: v4l2_pix_format format (output)
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*
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* Fill the output pix structure with information from the input mbus format.
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* The bytesperline and sizeimage fields are computed from the requested bytes
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* per line value in the pix format and information from the video instance.
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*
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* Return the number of padding bytes at end of line.
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*/
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static unsigned int iss_video_mbus_to_pix(const struct iss_video *video,
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const struct v4l2_mbus_framefmt *mbus,
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struct v4l2_pix_format *pix)
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{
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unsigned int bpl = pix->bytesperline;
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unsigned int min_bpl;
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unsigned int i;
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memset(pix, 0, sizeof(*pix));
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pix->width = mbus->width;
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pix->height = mbus->height;
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/*
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* Skip the last format in the loop so that it will be selected if no
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* match is found.
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*/
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for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
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if (formats[i].code == mbus->code)
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break;
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}
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min_bpl = pix->width * ALIGN(formats[i].bpp, 8) / 8;
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/*
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* Clamp the requested bytes per line value. If the maximum bytes per
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* line value is zero, the module doesn't support user configurable line
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* sizes. Override the requested value with the minimum in that case.
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*/
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if (video->bpl_max)
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bpl = clamp(bpl, min_bpl, video->bpl_max);
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else
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bpl = min_bpl;
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if (!video->bpl_zero_padding || bpl != min_bpl)
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bpl = ALIGN(bpl, video->bpl_alignment);
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pix->pixelformat = formats[i].pixelformat;
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pix->bytesperline = bpl;
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pix->sizeimage = pix->bytesperline * pix->height;
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pix->colorspace = mbus->colorspace;
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pix->field = mbus->field;
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/* FIXME: Special case for NV12! We should make this nicer... */
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if (pix->pixelformat == V4L2_PIX_FMT_NV12)
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pix->sizeimage += (pix->bytesperline * pix->height) / 2;
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return bpl - min_bpl;
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}
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static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix,
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struct v4l2_mbus_framefmt *mbus)
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{
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unsigned int i;
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memset(mbus, 0, sizeof(*mbus));
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mbus->width = pix->width;
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mbus->height = pix->height;
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/*
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* Skip the last format in the loop so that it will be selected if no
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* match is found.
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*/
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for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
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if (formats[i].pixelformat == pix->pixelformat)
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break;
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}
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mbus->code = formats[i].code;
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mbus->colorspace = pix->colorspace;
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mbus->field = pix->field;
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}
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static struct v4l2_subdev *
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iss_video_remote_subdev(struct iss_video *video, u32 *pad)
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{
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struct media_pad *remote;
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remote = media_entity_remote_pad(&video->pad);
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if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
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return NULL;
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if (pad)
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*pad = remote->index;
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return media_entity_to_v4l2_subdev(remote->entity);
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}
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/* Return a pointer to the ISS video instance at the far end of the pipeline. */
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static struct iss_video *
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iss_video_far_end(struct iss_video *video)
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{
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struct media_graph graph;
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struct media_entity *entity = &video->video.entity;
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struct media_device *mdev = entity->graph_obj.mdev;
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struct iss_video *far_end = NULL;
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mutex_lock(&mdev->graph_mutex);
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if (media_graph_walk_init(&graph, mdev)) {
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mutex_unlock(&mdev->graph_mutex);
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return NULL;
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}
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media_graph_walk_start(&graph, entity);
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while ((entity = media_graph_walk_next(&graph))) {
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if (entity == &video->video.entity)
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continue;
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if (!is_media_entity_v4l2_video_device(entity))
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continue;
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far_end = to_iss_video(media_entity_to_video_device(entity));
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if (far_end->type != video->type)
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break;
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far_end = NULL;
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}
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mutex_unlock(&mdev->graph_mutex);
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media_graph_walk_cleanup(&graph);
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return far_end;
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}
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static int
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__iss_video_get_format(struct iss_video *video,
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struct v4l2_mbus_framefmt *format)
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{
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struct v4l2_subdev_format fmt;
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struct v4l2_subdev *subdev;
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u32 pad;
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int ret;
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subdev = iss_video_remote_subdev(video, &pad);
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if (!subdev)
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return -EINVAL;
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memset(&fmt, 0, sizeof(fmt));
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fmt.pad = pad;
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fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
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mutex_lock(&video->mutex);
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ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
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mutex_unlock(&video->mutex);
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if (ret)
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return ret;
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*format = fmt.format;
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return 0;
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}
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static int
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iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh)
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{
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struct v4l2_mbus_framefmt format;
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struct v4l2_pix_format pixfmt;
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int ret;
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ret = __iss_video_get_format(video, &format);
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if (ret < 0)
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return ret;
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pixfmt.bytesperline = 0;
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ret = iss_video_mbus_to_pix(video, &format, &pixfmt);
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if (vfh->format.fmt.pix.pixelformat != pixfmt.pixelformat ||
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vfh->format.fmt.pix.height != pixfmt.height ||
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vfh->format.fmt.pix.width != pixfmt.width ||
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vfh->format.fmt.pix.bytesperline != pixfmt.bytesperline ||
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vfh->format.fmt.pix.sizeimage != pixfmt.sizeimage)
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return -EINVAL;
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* Video queue operations
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*/
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static int iss_video_queue_setup(struct vb2_queue *vq,
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unsigned int *count, unsigned int *num_planes,
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unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct iss_video_fh *vfh = vb2_get_drv_priv(vq);
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struct iss_video *video = vfh->video;
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/* Revisit multi-planar support for NV12 */
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*num_planes = 1;
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sizes[0] = vfh->format.fmt.pix.sizeimage;
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if (sizes[0] == 0)
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return -EINVAL;
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*count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
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return 0;
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}
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static void iss_video_buf_cleanup(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb);
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if (buffer->iss_addr)
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buffer->iss_addr = 0;
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}
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static int iss_video_buf_prepare(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
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struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb);
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struct iss_video *video = vfh->video;
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unsigned long size = vfh->format.fmt.pix.sizeimage;
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dma_addr_t addr;
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if (vb2_plane_size(vb, 0) < size)
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return -ENOBUFS;
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addr = vb2_dma_contig_plane_dma_addr(vb, 0);
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if (!IS_ALIGNED(addr, 32)) {
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dev_dbg(video->iss->dev,
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"Buffer address must be aligned to 32 bytes boundary.\n");
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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buffer->iss_addr = addr;
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return 0;
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}
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static void iss_video_buf_queue(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue);
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struct iss_video *video = vfh->video;
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struct iss_buffer *buffer = container_of(vbuf, struct iss_buffer, vb);
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struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
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unsigned long flags;
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bool empty;
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spin_lock_irqsave(&video->qlock, flags);
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/*
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* Mark the buffer is faulty and give it back to the queue immediately
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* if the video node has registered an error. vb2 will perform the same
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* check when preparing the buffer, but that is inherently racy, so we
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* need to handle the race condition with an authoritative check here.
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*/
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if (unlikely(video->error)) {
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vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
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spin_unlock_irqrestore(&video->qlock, flags);
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return;
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}
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empty = list_empty(&video->dmaqueue);
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list_add_tail(&buffer->list, &video->dmaqueue);
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spin_unlock_irqrestore(&video->qlock, flags);
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if (empty) {
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enum iss_pipeline_state state;
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unsigned int start;
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if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
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state = ISS_PIPELINE_QUEUE_OUTPUT;
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else
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state = ISS_PIPELINE_QUEUE_INPUT;
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spin_lock_irqsave(&pipe->lock, flags);
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pipe->state |= state;
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video->ops->queue(video, buffer);
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video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED;
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start = iss_pipeline_ready(pipe);
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if (start)
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pipe->state |= ISS_PIPELINE_STREAM;
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spin_unlock_irqrestore(&pipe->lock, flags);
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if (start)
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omap4iss_pipeline_set_stream(pipe,
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ISS_PIPELINE_STREAM_SINGLESHOT);
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}
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}
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static const struct vb2_ops iss_video_vb2ops = {
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.queue_setup = iss_video_queue_setup,
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.buf_prepare = iss_video_buf_prepare,
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.buf_queue = iss_video_buf_queue,
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.buf_cleanup = iss_video_buf_cleanup,
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};
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/*
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* omap4iss_video_buffer_next - Complete the current buffer and return the next
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* @video: ISS video object
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*
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* Remove the current video buffer from the DMA queue and fill its timestamp,
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* field count and state fields before waking up its completion handler.
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*
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* For capture video nodes, the buffer state is set to VB2_BUF_STATE_DONE if no
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* error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
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*
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* The DMA queue is expected to contain at least one buffer.
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*
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* Return a pointer to the next buffer in the DMA queue, or NULL if the queue is
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* empty.
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*/
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struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video)
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{
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struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
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enum iss_pipeline_state state;
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struct iss_buffer *buf;
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unsigned long flags;
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spin_lock_irqsave(&video->qlock, flags);
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if (WARN_ON(list_empty(&video->dmaqueue))) {
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spin_unlock_irqrestore(&video->qlock, flags);
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return NULL;
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}
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buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
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list);
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list_del(&buf->list);
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spin_unlock_irqrestore(&video->qlock, flags);
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buf->vb.vb2_buf.timestamp = ktime_get_ns();
|
|
/*
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* Do frame number propagation only if this is the output video node.
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* Frame number either comes from the CSI receivers or it gets
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* incremented here if H3A is not active.
|
* Note: There is no guarantee that the output buffer will finish
|
* first, so the input number might lag behind by 1 in some cases.
|
*/
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if (video == pipe->output && !pipe->do_propagation)
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buf->vb.sequence =
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atomic_inc_return(&pipe->frame_number);
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else
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buf->vb.sequence = atomic_read(&pipe->frame_number);
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vb2_buffer_done(&buf->vb.vb2_buf, pipe->error ?
|
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
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pipe->error = false;
|
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spin_lock_irqsave(&video->qlock, flags);
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if (list_empty(&video->dmaqueue)) {
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spin_unlock_irqrestore(&video->qlock, flags);
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if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
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state = ISS_PIPELINE_QUEUE_OUTPUT
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| ISS_PIPELINE_STREAM;
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else
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state = ISS_PIPELINE_QUEUE_INPUT
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| ISS_PIPELINE_STREAM;
|
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spin_lock_irqsave(&pipe->lock, flags);
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pipe->state &= ~state;
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if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS)
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video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
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spin_unlock_irqrestore(&pipe->lock, flags);
|
return NULL;
|
}
|
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input) {
|
spin_lock(&pipe->lock);
|
pipe->state &= ~ISS_PIPELINE_STREAM;
|
spin_unlock(&pipe->lock);
|
}
|
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buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
|
list);
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spin_unlock_irqrestore(&video->qlock, flags);
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buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
|
return buf;
|
}
|
|
/*
|
* omap4iss_video_cancel_stream - Cancel stream on a video node
|
* @video: ISS video object
|
*
|
* Cancelling a stream mark all buffers on the video node as erroneous and makes
|
* sure no new buffer can be queued.
|
*/
|
void omap4iss_video_cancel_stream(struct iss_video *video)
|
{
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unsigned long flags;
|
|
spin_lock_irqsave(&video->qlock, flags);
|
|
while (!list_empty(&video->dmaqueue)) {
|
struct iss_buffer *buf;
|
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buf = list_first_entry(&video->dmaqueue, struct iss_buffer,
|
list);
|
list_del(&buf->list);
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
|
}
|
|
vb2_queue_error(video->queue);
|
video->error = true;
|
|
spin_unlock_irqrestore(&video->qlock, flags);
|
}
|
|
/* -----------------------------------------------------------------------------
|
* V4L2 ioctls
|
*/
|
|
static int
|
iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
|
{
|
struct iss_video *video = video_drvdata(file);
|
|
strscpy(cap->driver, ISS_VIDEO_DRIVER_NAME, sizeof(cap->driver));
|
strscpy(cap->card, video->video.name, sizeof(cap->card));
|
strscpy(cap->bus_info, "media", sizeof(cap->bus_info));
|
cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
|
| V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT;
|
|
return 0;
|
}
|
|
static int
|
iss_video_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_mbus_framefmt format;
|
unsigned int index = f->index;
|
unsigned int i;
|
int ret;
|
|
if (f->type != video->type)
|
return -EINVAL;
|
|
ret = __iss_video_get_format(video, &format);
|
if (ret < 0)
|
return ret;
|
|
for (i = 0; i < ARRAY_SIZE(formats); ++i) {
|
const struct iss_format_info *info = &formats[i];
|
|
if (format.code != info->code)
|
continue;
|
|
if (index == 0) {
|
f->pixelformat = info->pixelformat;
|
return 0;
|
}
|
|
index--;
|
}
|
|
return -EINVAL;
|
}
|
|
static int
|
iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
|
if (format->type != video->type)
|
return -EINVAL;
|
|
mutex_lock(&video->mutex);
|
*format = vfh->format;
|
mutex_unlock(&video->mutex);
|
|
return 0;
|
}
|
|
static int
|
iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_mbus_framefmt fmt;
|
|
if (format->type != video->type)
|
return -EINVAL;
|
|
mutex_lock(&video->mutex);
|
|
/*
|
* Fill the bytesperline and sizeimage fields by converting to media bus
|
* format and back to pixel format.
|
*/
|
iss_video_pix_to_mbus(&format->fmt.pix, &fmt);
|
iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix);
|
|
vfh->format = *format;
|
|
mutex_unlock(&video->mutex);
|
return 0;
|
}
|
|
static int
|
iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_subdev_format fmt;
|
struct v4l2_subdev *subdev;
|
u32 pad;
|
int ret;
|
|
if (format->type != video->type)
|
return -EINVAL;
|
|
subdev = iss_video_remote_subdev(video, &pad);
|
if (!subdev)
|
return -EINVAL;
|
|
iss_video_pix_to_mbus(&format->fmt.pix, &fmt.format);
|
|
fmt.pad = pad;
|
fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
|
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
|
if (ret)
|
return ret;
|
|
iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix);
|
return 0;
|
}
|
|
static int
|
iss_video_get_selection(struct file *file, void *fh, struct v4l2_selection *sel)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_subdev_format format;
|
struct v4l2_subdev *subdev;
|
struct v4l2_subdev_selection sdsel = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
.target = sel->target,
|
};
|
u32 pad;
|
int ret;
|
|
switch (sel->target) {
|
case V4L2_SEL_TGT_CROP:
|
case V4L2_SEL_TGT_CROP_BOUNDS:
|
case V4L2_SEL_TGT_CROP_DEFAULT:
|
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
|
return -EINVAL;
|
break;
|
case V4L2_SEL_TGT_COMPOSE:
|
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
|
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
return -EINVAL;
|
break;
|
default:
|
return -EINVAL;
|
}
|
subdev = iss_video_remote_subdev(video, &pad);
|
if (!subdev)
|
return -EINVAL;
|
|
/*
|
* Try the get selection operation first and fallback to get format if
|
* not implemented.
|
*/
|
sdsel.pad = pad;
|
ret = v4l2_subdev_call(subdev, pad, get_selection, NULL, &sdsel);
|
if (!ret)
|
sel->r = sdsel.r;
|
if (ret != -ENOIOCTLCMD)
|
return ret;
|
|
format.pad = pad;
|
format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
|
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format);
|
if (ret < 0)
|
return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
|
|
sel->r.left = 0;
|
sel->r.top = 0;
|
sel->r.width = format.format.width;
|
sel->r.height = format.format.height;
|
|
return 0;
|
}
|
|
static int
|
iss_video_set_selection(struct file *file, void *fh, struct v4l2_selection *sel)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_subdev *subdev;
|
struct v4l2_subdev_selection sdsel = {
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
.target = sel->target,
|
.flags = sel->flags,
|
.r = sel->r,
|
};
|
u32 pad;
|
int ret;
|
|
switch (sel->target) {
|
case V4L2_SEL_TGT_CROP:
|
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
|
return -EINVAL;
|
break;
|
case V4L2_SEL_TGT_COMPOSE:
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
return -EINVAL;
|
break;
|
default:
|
return -EINVAL;
|
}
|
subdev = iss_video_remote_subdev(video, &pad);
|
if (!subdev)
|
return -EINVAL;
|
|
sdsel.pad = pad;
|
mutex_lock(&video->mutex);
|
ret = v4l2_subdev_call(subdev, pad, set_selection, NULL, &sdsel);
|
mutex_unlock(&video->mutex);
|
if (!ret)
|
sel->r = sdsel.r;
|
|
return ret == -ENOIOCTLCMD ? -ENOTTY : ret;
|
}
|
|
static int
|
iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
|
if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
|
video->type != a->type)
|
return -EINVAL;
|
|
memset(a, 0, sizeof(*a));
|
a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
|
a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
|
a->parm.output.timeperframe = vfh->timeperframe;
|
|
return 0;
|
}
|
|
static int
|
iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
|
if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
|
video->type != a->type)
|
return -EINVAL;
|
|
if (a->parm.output.timeperframe.denominator == 0)
|
a->parm.output.timeperframe.denominator = 1;
|
|
vfh->timeperframe = a->parm.output.timeperframe;
|
|
return 0;
|
}
|
|
static int
|
iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
|
return vb2_reqbufs(&vfh->queue, rb);
|
}
|
|
static int
|
iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
|
return vb2_querybuf(&vfh->queue, b);
|
}
|
|
static int
|
iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
|
return vb2_qbuf(&vfh->queue, video->video.v4l2_dev->mdev, b);
|
}
|
|
static int
|
iss_video_expbuf(struct file *file, void *fh, struct v4l2_exportbuffer *e)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
|
return vb2_expbuf(&vfh->queue, e);
|
}
|
|
static int
|
iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
|
return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
|
}
|
|
/*
|
* Stream management
|
*
|
* Every ISS pipeline has a single input and a single output. The input can be
|
* either a sensor or a video node. The output is always a video node.
|
*
|
* As every pipeline has an output video node, the ISS video objects at the
|
* pipeline output stores the pipeline state. It tracks the streaming state of
|
* both the input and output, as well as the availability of buffers.
|
*
|
* In sensor-to-memory mode, frames are always available at the pipeline input.
|
* Starting the sensor usually requires I2C transfers and must be done in
|
* interruptible context. The pipeline is started and stopped synchronously
|
* to the stream on/off commands. All modules in the pipeline will get their
|
* subdev set stream handler called. The module at the end of the pipeline must
|
* delay starting the hardware until buffers are available at its output.
|
*
|
* In memory-to-memory mode, starting/stopping the stream requires
|
* synchronization between the input and output. ISS modules can't be stopped
|
* in the middle of a frame, and at least some of the modules seem to become
|
* busy as soon as they're started, even if they don't receive a frame start
|
* event. For that reason frames need to be processed in single-shot mode. The
|
* driver needs to wait until a frame is completely processed and written to
|
* memory before restarting the pipeline for the next frame. Pipelined
|
* processing might be possible but requires more testing.
|
*
|
* Stream start must be delayed until buffers are available at both the input
|
* and output. The pipeline must be started in the videobuf queue callback with
|
* the buffers queue spinlock held. The modules subdev set stream operation must
|
* not sleep.
|
*/
|
static int
|
iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
struct media_graph graph;
|
struct media_entity *entity = &video->video.entity;
|
enum iss_pipeline_state state;
|
struct iss_pipeline *pipe;
|
struct iss_video *far_end;
|
unsigned long flags;
|
int ret;
|
|
if (type != video->type)
|
return -EINVAL;
|
|
mutex_lock(&video->stream_lock);
|
|
/*
|
* Start streaming on the pipeline. No link touching an entity in the
|
* pipeline can be activated or deactivated once streaming is started.
|
*/
|
pipe = entity->pipe
|
? to_iss_pipeline(entity) : &video->pipe;
|
pipe->external = NULL;
|
pipe->external_rate = 0;
|
pipe->external_bpp = 0;
|
|
ret = media_entity_enum_init(&pipe->ent_enum, entity->graph_obj.mdev);
|
if (ret)
|
goto err_graph_walk_init;
|
|
ret = media_graph_walk_init(&graph, entity->graph_obj.mdev);
|
if (ret)
|
goto err_graph_walk_init;
|
|
if (video->iss->pdata->set_constraints)
|
video->iss->pdata->set_constraints(video->iss, true);
|
|
ret = media_pipeline_start(entity, &pipe->pipe);
|
if (ret < 0)
|
goto err_media_pipeline_start;
|
|
media_graph_walk_start(&graph, entity);
|
while ((entity = media_graph_walk_next(&graph)))
|
media_entity_enum_set(&pipe->ent_enum, entity);
|
|
/*
|
* Verify that the currently configured format matches the output of
|
* the connected subdev.
|
*/
|
ret = iss_video_check_format(video, vfh);
|
if (ret < 0)
|
goto err_iss_video_check_format;
|
|
video->bpl_padding = ret;
|
video->bpl_value = vfh->format.fmt.pix.bytesperline;
|
|
/*
|
* Find the ISS video node connected at the far end of the pipeline and
|
* update the pipeline.
|
*/
|
far_end = iss_video_far_end(video);
|
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
|
state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT;
|
pipe->input = far_end;
|
pipe->output = video;
|
} else {
|
if (!far_end) {
|
ret = -EPIPE;
|
goto err_iss_video_check_format;
|
}
|
|
state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT;
|
pipe->input = video;
|
pipe->output = far_end;
|
}
|
|
spin_lock_irqsave(&pipe->lock, flags);
|
pipe->state &= ~ISS_PIPELINE_STREAM;
|
pipe->state |= state;
|
spin_unlock_irqrestore(&pipe->lock, flags);
|
|
/*
|
* Set the maximum time per frame as the value requested by userspace.
|
* This is a soft limit that can be overridden if the hardware doesn't
|
* support the request limit.
|
*/
|
if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
|
pipe->max_timeperframe = vfh->timeperframe;
|
|
video->queue = &vfh->queue;
|
INIT_LIST_HEAD(&video->dmaqueue);
|
video->error = false;
|
atomic_set(&pipe->frame_number, -1);
|
|
ret = vb2_streamon(&vfh->queue, type);
|
if (ret < 0)
|
goto err_iss_video_check_format;
|
|
/*
|
* In sensor-to-memory mode, the stream can be started synchronously
|
* to the stream on command. In memory-to-memory mode, it will be
|
* started when buffers are queued on both the input and output.
|
*/
|
if (!pipe->input) {
|
unsigned long flags;
|
|
ret = omap4iss_pipeline_set_stream(pipe,
|
ISS_PIPELINE_STREAM_CONTINUOUS);
|
if (ret < 0)
|
goto err_omap4iss_set_stream;
|
spin_lock_irqsave(&video->qlock, flags);
|
if (list_empty(&video->dmaqueue))
|
video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN;
|
spin_unlock_irqrestore(&video->qlock, flags);
|
}
|
|
media_graph_walk_cleanup(&graph);
|
|
mutex_unlock(&video->stream_lock);
|
|
return 0;
|
|
err_omap4iss_set_stream:
|
vb2_streamoff(&vfh->queue, type);
|
err_iss_video_check_format:
|
media_pipeline_stop(&video->video.entity);
|
err_media_pipeline_start:
|
if (video->iss->pdata->set_constraints)
|
video->iss->pdata->set_constraints(video->iss, false);
|
video->queue = NULL;
|
|
media_graph_walk_cleanup(&graph);
|
|
err_graph_walk_init:
|
media_entity_enum_cleanup(&pipe->ent_enum);
|
|
mutex_unlock(&video->stream_lock);
|
|
return ret;
|
}
|
|
static int
|
iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(fh);
|
struct iss_video *video = video_drvdata(file);
|
struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity);
|
enum iss_pipeline_state state;
|
unsigned long flags;
|
|
if (type != video->type)
|
return -EINVAL;
|
|
mutex_lock(&video->stream_lock);
|
|
if (!vb2_is_streaming(&vfh->queue))
|
goto done;
|
|
/* Update the pipeline state. */
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
state = ISS_PIPELINE_STREAM_OUTPUT
|
| ISS_PIPELINE_QUEUE_OUTPUT;
|
else
|
state = ISS_PIPELINE_STREAM_INPUT
|
| ISS_PIPELINE_QUEUE_INPUT;
|
|
spin_lock_irqsave(&pipe->lock, flags);
|
pipe->state &= ~state;
|
spin_unlock_irqrestore(&pipe->lock, flags);
|
|
/* Stop the stream. */
|
omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED);
|
vb2_streamoff(&vfh->queue, type);
|
video->queue = NULL;
|
|
media_entity_enum_cleanup(&pipe->ent_enum);
|
|
if (video->iss->pdata->set_constraints)
|
video->iss->pdata->set_constraints(video->iss, false);
|
media_pipeline_stop(&video->video.entity);
|
|
done:
|
mutex_unlock(&video->stream_lock);
|
return 0;
|
}
|
|
static int
|
iss_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
|
{
|
if (input->index > 0)
|
return -EINVAL;
|
|
strscpy(input->name, "camera", sizeof(input->name));
|
input->type = V4L2_INPUT_TYPE_CAMERA;
|
|
return 0;
|
}
|
|
static int
|
iss_video_g_input(struct file *file, void *fh, unsigned int *input)
|
{
|
*input = 0;
|
|
return 0;
|
}
|
|
static int
|
iss_video_s_input(struct file *file, void *fh, unsigned int input)
|
{
|
return input == 0 ? 0 : -EINVAL;
|
}
|
|
static const struct v4l2_ioctl_ops iss_video_ioctl_ops = {
|
.vidioc_querycap = iss_video_querycap,
|
.vidioc_enum_fmt_vid_cap = iss_video_enum_format,
|
.vidioc_g_fmt_vid_cap = iss_video_get_format,
|
.vidioc_s_fmt_vid_cap = iss_video_set_format,
|
.vidioc_try_fmt_vid_cap = iss_video_try_format,
|
.vidioc_g_fmt_vid_out = iss_video_get_format,
|
.vidioc_s_fmt_vid_out = iss_video_set_format,
|
.vidioc_try_fmt_vid_out = iss_video_try_format,
|
.vidioc_g_selection = iss_video_get_selection,
|
.vidioc_s_selection = iss_video_set_selection,
|
.vidioc_g_parm = iss_video_get_param,
|
.vidioc_s_parm = iss_video_set_param,
|
.vidioc_reqbufs = iss_video_reqbufs,
|
.vidioc_querybuf = iss_video_querybuf,
|
.vidioc_qbuf = iss_video_qbuf,
|
.vidioc_expbuf = iss_video_expbuf,
|
.vidioc_dqbuf = iss_video_dqbuf,
|
.vidioc_streamon = iss_video_streamon,
|
.vidioc_streamoff = iss_video_streamoff,
|
.vidioc_enum_input = iss_video_enum_input,
|
.vidioc_g_input = iss_video_g_input,
|
.vidioc_s_input = iss_video_s_input,
|
};
|
|
/* -----------------------------------------------------------------------------
|
* V4L2 file operations
|
*/
|
|
static int iss_video_open(struct file *file)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct iss_video_fh *handle;
|
struct vb2_queue *q;
|
int ret = 0;
|
|
handle = kzalloc(sizeof(*handle), GFP_KERNEL);
|
if (!handle)
|
return -ENOMEM;
|
|
v4l2_fh_init(&handle->vfh, &video->video);
|
v4l2_fh_add(&handle->vfh);
|
|
/* If this is the first user, initialise the pipeline. */
|
if (!omap4iss_get(video->iss)) {
|
ret = -EBUSY;
|
goto done;
|
}
|
|
ret = v4l2_pipeline_pm_get(&video->video.entity);
|
if (ret < 0) {
|
omap4iss_put(video->iss);
|
goto done;
|
}
|
|
q = &handle->queue;
|
|
q->type = video->type;
|
q->io_modes = VB2_MMAP | VB2_DMABUF;
|
q->drv_priv = handle;
|
q->ops = &iss_video_vb2ops;
|
q->mem_ops = &vb2_dma_contig_memops;
|
q->buf_struct_size = sizeof(struct iss_buffer);
|
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
q->dev = video->iss->dev;
|
|
ret = vb2_queue_init(q);
|
if (ret) {
|
omap4iss_put(video->iss);
|
goto done;
|
}
|
|
memset(&handle->format, 0, sizeof(handle->format));
|
handle->format.type = video->type;
|
handle->timeperframe.denominator = 1;
|
|
handle->video = video;
|
file->private_data = &handle->vfh;
|
|
done:
|
if (ret < 0) {
|
v4l2_fh_del(&handle->vfh);
|
v4l2_fh_exit(&handle->vfh);
|
kfree(handle);
|
}
|
|
return ret;
|
}
|
|
static int iss_video_release(struct file *file)
|
{
|
struct iss_video *video = video_drvdata(file);
|
struct v4l2_fh *vfh = file->private_data;
|
struct iss_video_fh *handle = to_iss_video_fh(vfh);
|
|
/* Disable streaming and free the buffers queue resources. */
|
iss_video_streamoff(file, vfh, video->type);
|
|
v4l2_pipeline_pm_put(&video->video.entity);
|
|
/* Release the videobuf2 queue */
|
vb2_queue_release(&handle->queue);
|
|
v4l2_fh_del(vfh);
|
v4l2_fh_exit(vfh);
|
kfree(handle);
|
file->private_data = NULL;
|
|
omap4iss_put(video->iss);
|
|
return 0;
|
}
|
|
static __poll_t iss_video_poll(struct file *file, poll_table *wait)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
|
|
return vb2_poll(&vfh->queue, file, wait);
|
}
|
|
static int iss_video_mmap(struct file *file, struct vm_area_struct *vma)
|
{
|
struct iss_video_fh *vfh = to_iss_video_fh(file->private_data);
|
|
return vb2_mmap(&vfh->queue, vma);
|
}
|
|
static const struct v4l2_file_operations iss_video_fops = {
|
.owner = THIS_MODULE,
|
.unlocked_ioctl = video_ioctl2,
|
.open = iss_video_open,
|
.release = iss_video_release,
|
.poll = iss_video_poll,
|
.mmap = iss_video_mmap,
|
};
|
|
/* -----------------------------------------------------------------------------
|
* ISS video core
|
*/
|
|
static const struct iss_video_operations iss_video_dummy_ops = {
|
};
|
|
int omap4iss_video_init(struct iss_video *video, const char *name)
|
{
|
const char *direction;
|
int ret;
|
|
switch (video->type) {
|
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
|
direction = "output";
|
video->pad.flags = MEDIA_PAD_FL_SINK;
|
break;
|
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
|
direction = "input";
|
video->pad.flags = MEDIA_PAD_FL_SOURCE;
|
break;
|
|
default:
|
return -EINVAL;
|
}
|
|
ret = media_entity_pads_init(&video->video.entity, 1, &video->pad);
|
if (ret < 0)
|
return ret;
|
|
spin_lock_init(&video->qlock);
|
mutex_init(&video->mutex);
|
atomic_set(&video->active, 0);
|
|
spin_lock_init(&video->pipe.lock);
|
mutex_init(&video->stream_lock);
|
|
/* Initialize the video device. */
|
if (!video->ops)
|
video->ops = &iss_video_dummy_ops;
|
|
video->video.fops = &iss_video_fops;
|
snprintf(video->video.name, sizeof(video->video.name),
|
"OMAP4 ISS %s %s", name, direction);
|
video->video.vfl_type = VFL_TYPE_VIDEO;
|
video->video.release = video_device_release_empty;
|
video->video.ioctl_ops = &iss_video_ioctl_ops;
|
video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED;
|
|
video_set_drvdata(&video->video, video);
|
|
return 0;
|
}
|
|
void omap4iss_video_cleanup(struct iss_video *video)
|
{
|
media_entity_cleanup(&video->video.entity);
|
mutex_destroy(&video->stream_lock);
|
mutex_destroy(&video->mutex);
|
}
|
|
int omap4iss_video_register(struct iss_video *video, struct v4l2_device *vdev)
|
{
|
int ret;
|
|
video->video.v4l2_dev = vdev;
|
if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
video->video.device_caps = V4L2_CAP_VIDEO_CAPTURE;
|
else
|
video->video.device_caps = V4L2_CAP_VIDEO_OUTPUT;
|
video->video.device_caps |= V4L2_CAP_STREAMING;
|
|
ret = video_register_device(&video->video, VFL_TYPE_VIDEO, -1);
|
if (ret < 0)
|
dev_err(video->iss->dev,
|
"could not register video device (%d)\n", ret);
|
|
return ret;
|
}
|
|
void omap4iss_video_unregister(struct iss_video *video)
|
{
|
video_unregister_device(&video->video);
|
}
|
