![André Almeida](/assets/img/avatar_default.png)
v4l2_fill_pixfmt() returns -EINVAL if the pixelformat used as parameter is invalid or if the user is trying to use a multiplanar format with the singleplanar API. Currently, the vimc_cap_try_fmt_vid_cap() returns such value, but vimc_cap_s_fmt_vid_cap() is ignoring it. Fix that and returns an error value if vimc_cap_try_fmt_vid_cap() has failed. Signed-off-by: André Almeida <andrealmeid@collabora.com> Suggested-by: Helen Koike <helen.koike@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
566 lines
15 KiB
C
566 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* vimc-capture.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/component.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-core.h>
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#include <media/videobuf2-vmalloc.h>
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#include "vimc-common.h"
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#include "vimc-streamer.h"
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#define VIMC_CAP_DRV_NAME "vimc-capture"
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static const u32 vimc_cap_supported_pixfmt[] = {
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V4L2_PIX_FMT_BGR24,
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V4L2_PIX_FMT_RGB24,
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V4L2_PIX_FMT_ARGB32,
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V4L2_PIX_FMT_SBGGR8,
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V4L2_PIX_FMT_SGBRG8,
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V4L2_PIX_FMT_SGRBG8,
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V4L2_PIX_FMT_SRGGB8,
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V4L2_PIX_FMT_SBGGR10,
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V4L2_PIX_FMT_SGBRG10,
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V4L2_PIX_FMT_SGRBG10,
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V4L2_PIX_FMT_SRGGB10,
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V4L2_PIX_FMT_SBGGR10ALAW8,
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V4L2_PIX_FMT_SGBRG10ALAW8,
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V4L2_PIX_FMT_SGRBG10ALAW8,
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V4L2_PIX_FMT_SRGGB10ALAW8,
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V4L2_PIX_FMT_SBGGR10DPCM8,
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V4L2_PIX_FMT_SGBRG10DPCM8,
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V4L2_PIX_FMT_SGRBG10DPCM8,
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V4L2_PIX_FMT_SRGGB10DPCM8,
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V4L2_PIX_FMT_SBGGR12,
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V4L2_PIX_FMT_SGBRG12,
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V4L2_PIX_FMT_SGRBG12,
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V4L2_PIX_FMT_SRGGB12,
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};
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struct vimc_cap_device {
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struct vimc_ent_device ved;
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struct video_device vdev;
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struct device *dev;
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struct v4l2_pix_format format;
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struct vb2_queue queue;
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struct list_head buf_list;
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/*
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* NOTE: in a real driver, a spin lock must be used to access the
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* queue because the frames are generated from a hardware interruption
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* and the isr is not allowed to sleep.
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* Even if it is not necessary a spinlock in the vimc driver, we
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* use it here as a code reference
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*/
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spinlock_t qlock;
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struct mutex lock;
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u32 sequence;
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struct vimc_stream stream;
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};
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static const struct v4l2_pix_format fmt_default = {
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.width = 640,
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.height = 480,
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.pixelformat = V4L2_PIX_FMT_RGB24,
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.field = V4L2_FIELD_NONE,
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.colorspace = V4L2_COLORSPACE_DEFAULT,
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};
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struct vimc_cap_buffer {
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/*
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* struct vb2_v4l2_buffer must be the first element
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* the videobuf2 framework will allocate this struct based on
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* buf_struct_size and use the first sizeof(struct vb2_buffer) bytes of
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* memory as a vb2_buffer
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*/
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struct vb2_v4l2_buffer vb2;
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struct list_head list;
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};
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static int vimc_cap_querycap(struct file *file, void *priv,
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struct v4l2_capability *cap)
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{
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strscpy(cap->driver, VIMC_PDEV_NAME, sizeof(cap->driver));
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strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
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snprintf(cap->bus_info, sizeof(cap->bus_info),
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"platform:%s", VIMC_PDEV_NAME);
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return 0;
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}
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static void vimc_cap_get_format(struct vimc_ent_device *ved,
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struct v4l2_pix_format *fmt)
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{
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struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
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ved);
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*fmt = vcap->format;
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}
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static int vimc_cap_g_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct vimc_cap_device *vcap = video_drvdata(file);
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f->fmt.pix = vcap->format;
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return 0;
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}
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static int vimc_cap_try_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct v4l2_pix_format *format = &f->fmt.pix;
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format->width = clamp_t(u32, format->width, VIMC_FRAME_MIN_WIDTH,
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VIMC_FRAME_MAX_WIDTH) & ~1;
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format->height = clamp_t(u32, format->height, VIMC_FRAME_MIN_HEIGHT,
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VIMC_FRAME_MAX_HEIGHT) & ~1;
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vimc_colorimetry_clamp(format);
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if (format->field == V4L2_FIELD_ANY)
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format->field = fmt_default.field;
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/* TODO: Add support for custom bytesperline values */
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/* Don't accept a pixelformat that is not on the table */
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if (!v4l2_format_info(format->pixelformat))
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format->pixelformat = fmt_default.pixelformat;
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return v4l2_fill_pixfmt(format, format->pixelformat,
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format->width, format->height);
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}
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static int vimc_cap_s_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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struct vimc_cap_device *vcap = video_drvdata(file);
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int ret;
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/* Do not change the format while stream is on */
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if (vb2_is_busy(&vcap->queue))
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return -EBUSY;
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ret = vimc_cap_try_fmt_vid_cap(file, priv, f);
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if (ret)
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return ret;
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dev_dbg(vcap->dev, "%s: format update: "
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"old:%dx%d (0x%x, %d, %d, %d, %d) "
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"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vcap->vdev.name,
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/* old */
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vcap->format.width, vcap->format.height,
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vcap->format.pixelformat, vcap->format.colorspace,
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vcap->format.quantization, vcap->format.xfer_func,
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vcap->format.ycbcr_enc,
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/* new */
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f->fmt.pix.width, f->fmt.pix.height,
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f->fmt.pix.pixelformat, f->fmt.pix.colorspace,
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f->fmt.pix.quantization, f->fmt.pix.xfer_func,
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f->fmt.pix.ycbcr_enc);
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vcap->format = f->fmt.pix;
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return 0;
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}
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static int vimc_cap_enum_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_fmtdesc *f)
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{
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if (f->index >= ARRAY_SIZE(vimc_cap_supported_pixfmt))
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return -EINVAL;
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f->pixelformat = vimc_cap_supported_pixfmt[f->index];
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return 0;
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}
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static bool vimc_cap_is_pixfmt_supported(u32 pixelformat)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(vimc_cap_supported_pixfmt); i++)
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if (vimc_cap_supported_pixfmt[i] == pixelformat)
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return true;
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return false;
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}
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static int vimc_cap_enum_framesizes(struct file *file, void *fh,
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struct v4l2_frmsizeenum *fsize)
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{
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if (fsize->index)
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return -EINVAL;
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if (!vimc_cap_is_pixfmt_supported(fsize->pixel_format))
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return -EINVAL;
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fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
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fsize->stepwise.min_width = VIMC_FRAME_MIN_WIDTH;
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fsize->stepwise.max_width = VIMC_FRAME_MAX_WIDTH;
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fsize->stepwise.min_height = VIMC_FRAME_MIN_HEIGHT;
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fsize->stepwise.max_height = VIMC_FRAME_MAX_HEIGHT;
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fsize->stepwise.step_width = 1;
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fsize->stepwise.step_height = 1;
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return 0;
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}
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static const struct v4l2_file_operations vimc_cap_fops = {
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.owner = THIS_MODULE,
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.open = v4l2_fh_open,
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.release = vb2_fop_release,
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.read = vb2_fop_read,
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.poll = vb2_fop_poll,
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.unlocked_ioctl = video_ioctl2,
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.mmap = vb2_fop_mmap,
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};
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static const struct v4l2_ioctl_ops vimc_cap_ioctl_ops = {
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.vidioc_querycap = vimc_cap_querycap,
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.vidioc_g_fmt_vid_cap = vimc_cap_g_fmt_vid_cap,
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.vidioc_s_fmt_vid_cap = vimc_cap_s_fmt_vid_cap,
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.vidioc_try_fmt_vid_cap = vimc_cap_try_fmt_vid_cap,
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.vidioc_enum_fmt_vid_cap = vimc_cap_enum_fmt_vid_cap,
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.vidioc_enum_framesizes = vimc_cap_enum_framesizes,
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.vidioc_reqbufs = vb2_ioctl_reqbufs,
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.vidioc_create_bufs = vb2_ioctl_create_bufs,
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.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
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.vidioc_querybuf = vb2_ioctl_querybuf,
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.vidioc_qbuf = vb2_ioctl_qbuf,
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.vidioc_dqbuf = vb2_ioctl_dqbuf,
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.vidioc_expbuf = vb2_ioctl_expbuf,
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.vidioc_streamon = vb2_ioctl_streamon,
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.vidioc_streamoff = vb2_ioctl_streamoff,
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};
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static void vimc_cap_return_all_buffers(struct vimc_cap_device *vcap,
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enum vb2_buffer_state state)
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{
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struct vimc_cap_buffer *vbuf, *node;
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spin_lock(&vcap->qlock);
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list_for_each_entry_safe(vbuf, node, &vcap->buf_list, list) {
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list_del(&vbuf->list);
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vb2_buffer_done(&vbuf->vb2.vb2_buf, state);
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}
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spin_unlock(&vcap->qlock);
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}
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static int vimc_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct vimc_cap_device *vcap = vb2_get_drv_priv(vq);
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struct media_entity *entity = &vcap->vdev.entity;
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int ret;
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vcap->sequence = 0;
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/* Start the media pipeline */
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ret = media_pipeline_start(entity, &vcap->stream.pipe);
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if (ret) {
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vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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vcap->stream.producer_pixfmt = vcap->format.pixelformat;
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ret = vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 1);
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if (ret) {
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media_pipeline_stop(entity);
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vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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return 0;
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}
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/*
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* Stop the stream engine. Any remaining buffers in the stream queue are
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* dequeued and passed on to the vb2 framework marked as STATE_ERROR.
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*/
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static void vimc_cap_stop_streaming(struct vb2_queue *vq)
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{
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struct vimc_cap_device *vcap = vb2_get_drv_priv(vq);
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vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 0);
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/* Stop the media pipeline */
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media_pipeline_stop(&vcap->vdev.entity);
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/* Release all active buffers */
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vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_ERROR);
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}
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static void vimc_cap_buf_queue(struct vb2_buffer *vb2_buf)
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{
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struct vimc_cap_device *vcap = vb2_get_drv_priv(vb2_buf->vb2_queue);
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struct vimc_cap_buffer *buf = container_of(vb2_buf,
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struct vimc_cap_buffer,
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vb2.vb2_buf);
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spin_lock(&vcap->qlock);
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list_add_tail(&buf->list, &vcap->buf_list);
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spin_unlock(&vcap->qlock);
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}
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static int vimc_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
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unsigned int *nplanes, unsigned int sizes[],
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struct device *alloc_devs[])
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{
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struct vimc_cap_device *vcap = vb2_get_drv_priv(vq);
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if (*nplanes)
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return sizes[0] < vcap->format.sizeimage ? -EINVAL : 0;
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/* We don't support multiplanes for now */
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*nplanes = 1;
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sizes[0] = vcap->format.sizeimage;
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return 0;
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}
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static int vimc_cap_buffer_prepare(struct vb2_buffer *vb)
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{
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struct vimc_cap_device *vcap = vb2_get_drv_priv(vb->vb2_queue);
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unsigned long size = vcap->format.sizeimage;
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if (vb2_plane_size(vb, 0) < size) {
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dev_err(vcap->dev, "%s: buffer too small (%lu < %lu)\n",
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vcap->vdev.name, vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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return 0;
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}
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static const struct vb2_ops vimc_cap_qops = {
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.start_streaming = vimc_cap_start_streaming,
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.stop_streaming = vimc_cap_stop_streaming,
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.buf_queue = vimc_cap_buf_queue,
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.queue_setup = vimc_cap_queue_setup,
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.buf_prepare = vimc_cap_buffer_prepare,
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/*
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* Since q->lock is set we can use the standard
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* vb2_ops_wait_prepare/finish helper functions.
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*/
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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static const struct media_entity_operations vimc_cap_mops = {
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.link_validate = vimc_link_validate,
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};
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static void vimc_cap_release(struct video_device *vdev)
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{
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struct vimc_cap_device *vcap =
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container_of(vdev, struct vimc_cap_device, vdev);
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vimc_pads_cleanup(vcap->ved.pads);
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kfree(vcap);
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}
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static void vimc_cap_comp_unbind(struct device *comp, struct device *master,
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void *master_data)
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{
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struct vimc_ent_device *ved = dev_get_drvdata(comp);
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struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
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ved);
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vb2_queue_release(&vcap->queue);
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media_entity_cleanup(ved->ent);
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video_unregister_device(&vcap->vdev);
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}
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static void *vimc_cap_process_frame(struct vimc_ent_device *ved,
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const void *frame)
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{
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struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
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ved);
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struct vimc_cap_buffer *vimc_buf;
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void *vbuf;
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spin_lock(&vcap->qlock);
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/* Get the first entry of the list */
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vimc_buf = list_first_entry_or_null(&vcap->buf_list,
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typeof(*vimc_buf), list);
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if (!vimc_buf) {
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spin_unlock(&vcap->qlock);
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return ERR_PTR(-EAGAIN);
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}
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/* Remove this entry from the list */
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list_del(&vimc_buf->list);
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spin_unlock(&vcap->qlock);
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/* Fill the buffer */
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vimc_buf->vb2.vb2_buf.timestamp = ktime_get_ns();
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vimc_buf->vb2.sequence = vcap->sequence++;
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vimc_buf->vb2.field = vcap->format.field;
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vbuf = vb2_plane_vaddr(&vimc_buf->vb2.vb2_buf, 0);
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memcpy(vbuf, frame, vcap->format.sizeimage);
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/* Set it as ready */
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vb2_set_plane_payload(&vimc_buf->vb2.vb2_buf, 0,
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vcap->format.sizeimage);
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vb2_buffer_done(&vimc_buf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
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return NULL;
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}
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static int vimc_cap_comp_bind(struct device *comp, struct device *master,
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void *master_data)
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{
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struct v4l2_device *v4l2_dev = master_data;
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struct vimc_platform_data *pdata = comp->platform_data;
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struct vimc_cap_device *vcap;
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struct video_device *vdev;
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struct vb2_queue *q;
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int ret;
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/* Allocate the vimc_cap_device struct */
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vcap = kzalloc(sizeof(*vcap), GFP_KERNEL);
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if (!vcap)
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return -ENOMEM;
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/* Allocate the pads */
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vcap->ved.pads =
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vimc_pads_init(1, (const unsigned long[1]) {MEDIA_PAD_FL_SINK});
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if (IS_ERR(vcap->ved.pads)) {
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ret = PTR_ERR(vcap->ved.pads);
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goto err_free_vcap;
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}
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/* Initialize the media entity */
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vcap->vdev.entity.name = pdata->entity_name;
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vcap->vdev.entity.function = MEDIA_ENT_F_IO_V4L;
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ret = media_entity_pads_init(&vcap->vdev.entity,
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1, vcap->ved.pads);
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|
if (ret)
|
|
goto err_clean_pads;
|
|
|
|
/* Initialize the lock */
|
|
mutex_init(&vcap->lock);
|
|
|
|
/* Initialize the vb2 queue */
|
|
q = &vcap->queue;
|
|
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_USERPTR;
|
|
q->drv_priv = vcap;
|
|
q->buf_struct_size = sizeof(struct vimc_cap_buffer);
|
|
q->ops = &vimc_cap_qops;
|
|
q->mem_ops = &vb2_vmalloc_memops;
|
|
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
|
|
q->min_buffers_needed = 2;
|
|
q->lock = &vcap->lock;
|
|
|
|
ret = vb2_queue_init(q);
|
|
if (ret) {
|
|
dev_err(comp, "%s: vb2 queue init failed (err=%d)\n",
|
|
pdata->entity_name, ret);
|
|
goto err_clean_m_ent;
|
|
}
|
|
|
|
/* Initialize buffer list and its lock */
|
|
INIT_LIST_HEAD(&vcap->buf_list);
|
|
spin_lock_init(&vcap->qlock);
|
|
|
|
/* Set default frame format */
|
|
vcap->format = fmt_default;
|
|
v4l2_fill_pixfmt(&vcap->format, vcap->format.pixelformat,
|
|
vcap->format.width, vcap->format.height);
|
|
|
|
/* Fill the vimc_ent_device struct */
|
|
vcap->ved.ent = &vcap->vdev.entity;
|
|
vcap->ved.process_frame = vimc_cap_process_frame;
|
|
vcap->ved.vdev_get_format = vimc_cap_get_format;
|
|
dev_set_drvdata(comp, &vcap->ved);
|
|
vcap->dev = comp;
|
|
|
|
/* Initialize the video_device struct */
|
|
vdev = &vcap->vdev;
|
|
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
vdev->entity.ops = &vimc_cap_mops;
|
|
vdev->release = vimc_cap_release;
|
|
vdev->fops = &vimc_cap_fops;
|
|
vdev->ioctl_ops = &vimc_cap_ioctl_ops;
|
|
vdev->lock = &vcap->lock;
|
|
vdev->queue = q;
|
|
vdev->v4l2_dev = v4l2_dev;
|
|
vdev->vfl_dir = VFL_DIR_RX;
|
|
strscpy(vdev->name, pdata->entity_name, sizeof(vdev->name));
|
|
video_set_drvdata(vdev, &vcap->ved);
|
|
|
|
/* Register the video_device with the v4l2 and the media framework */
|
|
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
|
|
if (ret) {
|
|
dev_err(comp, "%s: video register failed (err=%d)\n",
|
|
vcap->vdev.name, ret);
|
|
goto err_release_queue;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_release_queue:
|
|
vb2_queue_release(q);
|
|
err_clean_m_ent:
|
|
media_entity_cleanup(&vcap->vdev.entity);
|
|
err_clean_pads:
|
|
vimc_pads_cleanup(vcap->ved.pads);
|
|
err_free_vcap:
|
|
kfree(vcap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct component_ops vimc_cap_comp_ops = {
|
|
.bind = vimc_cap_comp_bind,
|
|
.unbind = vimc_cap_comp_unbind,
|
|
};
|
|
|
|
static int vimc_cap_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &vimc_cap_comp_ops);
|
|
}
|
|
|
|
static int vimc_cap_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &vimc_cap_comp_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id vimc_cap_driver_ids[] = {
|
|
{
|
|
.name = VIMC_CAP_DRV_NAME,
|
|
},
|
|
{ }
|
|
};
|
|
|
|
static struct platform_driver vimc_cap_pdrv = {
|
|
.probe = vimc_cap_probe,
|
|
.remove = vimc_cap_remove,
|
|
.id_table = vimc_cap_driver_ids,
|
|
.driver = {
|
|
.name = VIMC_CAP_DRV_NAME,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(vimc_cap_pdrv);
|
|
|
|
MODULE_DEVICE_TABLE(platform, vimc_cap_driver_ids);
|
|
|
|
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Capture");
|
|
MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|