Hi Laurent
Thanks for the patches. This one looks good mostly, a couple of questions
though:
On Wed, 25 Jan 2012, Laurent Pinchart wrote:
> Instead of computing the buffer size manually in the videobuf queue
> setup and buffer prepare callbacks, use the previously negotiated
> soc_camera_device::sizeimage value.
>
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> drivers/media/video/atmel-isi.c | 17 +++--------------
> drivers/media/video/mx1_camera.c | 14 ++------------
> drivers/media/video/mx2_camera.c | 14 ++------------
> drivers/media/video/mx3_camera.c | 20 +++++++++-----------
> drivers/media/video/omap1_camera.c | 14 ++------------
> drivers/media/video/pxa_camera.c | 14 ++------------
> drivers/media/video/sh_mobile_ceu_camera.c | 25 +++++++++----------------
> 7 files changed, 29 insertions(+), 89 deletions(-)
[snip]
> diff --git a/drivers/media/video/mx2_camera.c
> b/drivers/media/video/mx2_camera.c
> index a803d9e..e9b228d 100644
> --- a/drivers/media/video/mx2_camera.c
> +++ b/drivers/media/video/mx2_camera.c
> @@ -433,15 +433,10 @@ static int mx2_videobuf_setup(struct videobuf_queue
> *vq, unsigned int *count,
> unsigned int *size)
> {
> struct soc_camera_device *icd = vq->priv_data;
> - int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
> - icd->current_fmt->host_fmt);
>
> dev_dbg(icd->parent, "count=%d, size=%d\n", *count, *size);
>
> - if (bytes_per_line < 0)
> - return bytes_per_line;
> -
> - *size = bytes_per_line * icd->user_height;
> + *size = icd->sizeimage;
>
> if (0 == *count)
> *count = 32;
I think, there is a bug in mx2_camera_try_fmt(), which also would affect
these your calculations. On i.MX25 they restrict the image size based on
maximum supported number of bytes. In such a case they recalculate
.bytesperline, but they fail to update .sizeimage. The fix seems to be
trivial, please add it, then your calculations should be fine.
> @@ -476,16 +471,11 @@ static int mx2_videobuf_prepare(struct videobuf_queue
> *vq,
> {
> struct soc_camera_device *icd = vq->priv_data;
> struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
> - int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
> - icd->current_fmt->host_fmt);
> int ret = 0;
>
> dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
> vb, vb->baddr, vb->bsize);
>
> - if (bytes_per_line < 0)
> - return bytes_per_line;
> -
> #ifdef DEBUG
> /*
> * This can be useful if you want to see if we actually fill
> @@ -505,7 +495,7 @@ static int mx2_videobuf_prepare(struct videobuf_queue *vq,
> vb->state = VIDEOBUF_NEEDS_INIT;
> }
>
> - vb->size = bytes_per_line * vb->height;
> + vb->size = icd->sizeimage;
> if (vb->baddr && vb->bsize < vb->size) {
> ret = -EINVAL;
> goto out;
> diff --git a/drivers/media/video/mx3_camera.c
> b/drivers/media/video/mx3_camera.c
> index f96f92f..da45a89 100644
> --- a/drivers/media/video/mx3_camera.c
> +++ b/drivers/media/video/mx3_camera.c
> @@ -199,8 +199,6 @@ static int mx3_videobuf_setup(struct vb2_queue *vq,
> struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> struct mx3_camera_dev *mx3_cam = ici->priv;
> - int bytes_per_line;
> - unsigned int height;
>
> if (!mx3_cam->idmac_channel[0])
> return -EINVAL;
> @@ -208,21 +206,21 @@ static int mx3_videobuf_setup(struct vb2_queue *vq,
> if (fmt) {
> const struct soc_camera_format_xlate *xlate =
> soc_camera_xlate_by_fourcc(icd,
>
> fmt->fmt.pix.pixelformat);
> + int bytes_per_line;
> +
> if (!xlate)
> return -EINVAL;
> +
> bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
> xlate->host_fmt);
> - height = fmt->fmt.pix.height;
> + if (bytes_per_line < 0)
> + return bytes_per_line;
> +
> + sizes[0] = bytes_per_line * fmt->fmt.pix.height;
> } else {
> /* Called from VIDIOC_REQBUFS or in compatibility mode */
> - bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
> - icd->current_fmt->host_fmt);
> - height = icd->user_height;
> + sizes[0] = icd->sizeimage;
> }
> - if (bytes_per_line < 0)
> - return bytes_per_line;
> -
> - sizes[0] = bytes_per_line * height;
>
> alloc_ctxs[0] = mx3_cam->alloc_ctx;
>
> @@ -274,7 +272,7 @@ static void mx3_videobuf_queue(struct vb2_buffer *vb)
>
> BUG_ON(bytes_per_line <= 0);
>
> - new_size = bytes_per_line * icd->user_height;
> + new_size = icd->sizeimage;
Don't you think, you could eliminate bytes_per_line too and just use
icd->bytesperline here too?
>
> if (vb2_plane_size(vb, 0) < new_size) {
> dev_err(icd->parent, "Buffer #%d too small (%lu < %zu)\n",
[snip]
> diff --git a/drivers/media/video/sh_mobile_ceu_camera.c
> b/drivers/media/video/sh_mobile_ceu_camera.c
> index c51decf..f4eb9e1 100644
> --- a/drivers/media/video/sh_mobile_ceu_camera.c
> +++ b/drivers/media/video/sh_mobile_ceu_camera.c
> @@ -206,27 +206,25 @@ static int sh_mobile_ceu_videobuf_setup(struct
> vb2_queue *vq,
> struct soc_camera_device *icd = container_of(vq, struct
> soc_camera_device, vb2_vidq);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> struct sh_mobile_ceu_dev *pcdev = ici->priv;
> - int bytes_per_line;
> - unsigned int height;
>
> if (fmt) {
> const struct soc_camera_format_xlate *xlate =
> soc_camera_xlate_by_fourcc(icd,
>
> fmt->fmt.pix.pixelformat);
> + int bytes_per_line;
> +
> if (!xlate)
> return -EINVAL;
> +
> bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
> xlate->host_fmt);
> - height = fmt->fmt.pix.height;
> + if (bytes_per_line < 0)
> + return bytes_per_line;
> +
> + sizes[0] = bytes_per_line * fmt->fmt.pix.height;
> } else {
> /* Called from VIDIOC_REQBUFS or in compatibility mode */
> - bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
> - icd->current_fmt->host_fmt);
> - height = icd->user_height;
> + sizes[0] = icd->sizeimage;
> }
> - if (bytes_per_line < 0)
> - return bytes_per_line;
> -
> - sizes[0] = bytes_per_line * height;
>
> alloc_ctxs[0] = pcdev->alloc_ctx;
>
> @@ -373,13 +371,8 @@ static void sh_mobile_ceu_videobuf_queue(struct
> vb2_buffer *vb)
> struct sh_mobile_ceu_dev *pcdev = ici->priv;
> struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
> unsigned long size;
> - int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
> - icd->current_fmt->host_fmt);
> -
> - if (bytes_per_line < 0)
> - goto error;
>
> - size = icd->user_height * bytes_per_line;
> + size = icd->sizeimage;
>
> if (vb2_plane_size(vb, 0) < size) {
> dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
Looks like sh_mobile_ceu_set_rect() can also be simplified, since there
bytes_per_line is calculated for data-fetch mode, for which the
->bytesperline can also be used?
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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