Hi Hans,
On Tuesday, 16 January 2018 11:46:42 EET Hans Verkuil wrote:
> Hi Jacopo,
>
> Sorry for the late review, but here is finally is.
>
> BTW, can you provide the v4l2-compliance output (ideally with the -f option)
> in the cover letter for v6?
>
> On 01/12/2018 03:04 PM, Jacopo Mondi wrote:
> > Add driver for Renesas Capture Engine Unit (CEU).
> >
> > The CEU interface supports capturing 'data' (YUV422) and 'images'
> > (NV[12|21|16|61]).
> >
> > This driver aims to replace the soc_camera-based sh_mobile_ceu one.
> >
> > Tested with ov7670 camera sensor, providing YUYV_2X8 data on Renesas RZ
> > platform GR-Peach.
> >
> > Tested with ov7725 camera sensor on SH4 platform Migo-R.
> >
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> > ---
> >
> > drivers/media/platform/Kconfig | 9 +
> > drivers/media/platform/Makefile | 1 +
> > drivers/media/platform/renesas-ceu.c | 1648 +++++++++++++++++++++++++++++
> > 3 files changed, 1658 insertions(+)
> > create mode 100644 drivers/media/platform/renesas-ceu.c
[snip]
> > diff --git a/drivers/media/platform/renesas-ceu.c
> > b/drivers/media/platform/renesas-ceu.c new file mode 100644
> > index 0000000..ccca838
> > --- /dev/null
> > +++ b/drivers/media/platform/renesas-ceu.c
[snip]
> > +static int ceu_s_input(struct file *file, void *priv, unsigned int i)
> > +{
> > + struct ceu_device *ceudev = video_drvdata(file);
> > + struct ceu_subdev *ceu_sd_old;
> > + int ret;
> > +
>
> Add a check:
>
> if (i == ceudev->sd_index)
> return 0;
>
> I.e. if the new input == the old input, then that's fine regardless of the
> streaming state.
On a side note this is the kind of checks that the core should handle, but
that's out of scope for this patch.
> > + if (vb2_is_streaming(&ceudev->vb2_vq))
> > + return -EBUSY;
> > +
> > + if (i >= ceudev->num_sd)
> > + return -EINVAL;
>
> Move this up as the first test.
>
> > +
> > + ceu_sd_old = ceudev->sd;
> > + ceudev->sd = &ceudev->subdevs[i];
> > +
> > + /* Make sure we can generate output image formats. */
> > + ret = ceu_init_formats(ceudev);
> > + if (ret) {
> > + ceudev->sd = ceu_sd_old;
> > + return -EINVAL;
> > + }
> > +
> > + /* now that we're sure we can use the sensor, power off the old one. */
> > + v4l2_subdev_call(ceu_sd_old->v4l2_sd, core, s_power, 0);
> > + v4l2_subdev_call(ceudev->sd->v4l2_sd, core, s_power, 1);
> > +
> > + ceudev->sd_index = i;
> > +
> > + return 0;
> > +}
[snip]
> > +
> > +static int ceu_notify_complete(struct v4l2_async_notifier *notifier)
> > +{
> > + struct v4l2_device *v4l2_dev = notifier->v4l2_dev;
> > + struct ceu_device *ceudev = v4l2_to_ceu(v4l2_dev);
> > + struct video_device *vdev = &ceudev->vdev;
> > + struct vb2_queue *q = &ceudev->vb2_vq;
> > + struct v4l2_subdev *v4l2_sd;
> > + int ret;
> > +
> > + /* Initialize vb2 queue. */
> > + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> > + q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
>
> Don't include VB2_USERPTR. It shouldn't be used with dma_contig.
>
> You also added a read() fop (vb2_fop_read), so either add VB2_READ here
> or remove the read fop.
Agreed. I'd drop both VB2_USERPTR and vb2_fop_read().
> > + q->drv_priv = ceudev;
> > + q->ops = &ceu_vb2_ops;
> > + q->mem_ops = &vb2_dma_contig_memops;
> > + q->buf_struct_size = sizeof(struct ceu_buffer);
> > + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
> > + q->lock = &ceudev->mlock;
> > + q->dev = ceudev->v4l2_dev.dev;
> > +
> > + ret = vb2_queue_init(q);
> > + if (ret)
> > + return ret;
> > +
> > + /*
> > + * Make sure at least one sensor is primary and use it to initialize
> > + * ceu formats.
> > + */
> > + if (!ceudev->sd) {
> > + ceudev->sd = &ceudev->subdevs[0];
> > + ceudev->sd_index = 0;
> > + }
> > +
> > + v4l2_sd = ceudev->sd->v4l2_sd;
> > +
> > + ret = ceu_init_formats(ceudev);
> > + if (ret)
> > + return ret;
> > +
> > + ret = ceu_set_default_fmt(ceudev);
> > + if (ret)
> > + return ret;
> > +
> > + /* Register the video device. */
> > + strncpy(vdev->name, DRIVER_NAME, strlen(DRIVER_NAME));
> > + vdev->v4l2_dev = v4l2_dev;
> > + vdev->lock = &ceudev->mlock;
> > + vdev->queue = &ceudev->vb2_vq;
> > + vdev->ctrl_handler = v4l2_sd->ctrl_handler;
> > + vdev->fops = &ceu_fops;
> > + vdev->ioctl_ops = &ceu_ioctl_ops;
> > + vdev->release = ceu_vdev_release;
> > + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
> > + V4L2_CAP_STREAMING;
> > + video_set_drvdata(vdev, ceudev);
> > +
> > + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
> > + if (ret < 0) {
> > + v4l2_err(vdev->v4l2_dev,
> > + "video_register_device failed: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + return 0;
> > +}
[snip]
You can keep my ack after addressing Hans' comments.
--
Regards,
Laurent Pinchart
