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V4L/DVB (10080): soc-camera: readability improvements, more strict op…
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…erations checks

Simplify multiple drivers by replacing f->fmt.pix.* with a single pointer
dereference, merge some needlessly broken lines, verify host and camera
operations pointers on registration.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Guennadi Liakhovetski authored and Mauro Carvalho Chehab committed Dec 30, 2008
1 parent 9414de3 commit 64f5905
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Showing 6 changed files with 81 additions and 69 deletions.
20 changes: 11 additions & 9 deletions drivers/media/video/mt9m001.c
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Original file line number Diff line number Diff line change
Expand Up @@ -327,15 +327,17 @@ static int mt9m001_set_fmt(struct soc_camera_device *icd,
static int mt9m001_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
if (f->fmt.pix.height < 32 + icd->y_skip_top)
f->fmt.pix.height = 32 + icd->y_skip_top;
if (f->fmt.pix.height > 1024 + icd->y_skip_top)
f->fmt.pix.height = 1024 + icd->y_skip_top;
if (f->fmt.pix.width < 48)
f->fmt.pix.width = 48;
if (f->fmt.pix.width > 1280)
f->fmt.pix.width = 1280;
f->fmt.pix.width &= ~0x01; /* has to be even, unsure why was ~3 */
struct v4l2_pix_format *pix = &f->fmt.pix;

if (pix->height < 32 + icd->y_skip_top)
pix->height = 32 + icd->y_skip_top;
if (pix->height > 1024 + icd->y_skip_top)
pix->height = 1024 + icd->y_skip_top;
if (pix->width < 48)
pix->width = 48;
if (pix->width > 1280)
pix->width = 1280;
pix->width &= ~0x01; /* has to be even, unsure why was ~3 */

return 0;
}
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10 changes: 6 additions & 4 deletions drivers/media/video/mt9m111.c
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Original file line number Diff line number Diff line change
Expand Up @@ -503,10 +503,12 @@ static int mt9m111_set_fmt(struct soc_camera_device *icd,
static int mt9m111_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
if (f->fmt.pix.height > MT9M111_MAX_HEIGHT)
f->fmt.pix.height = MT9M111_MAX_HEIGHT;
if (f->fmt.pix.width > MT9M111_MAX_WIDTH)
f->fmt.pix.width = MT9M111_MAX_WIDTH;
struct v4l2_pix_format *pix = &f->fmt.pix;

if (pix->height > MT9M111_MAX_HEIGHT)
pix->height = MT9M111_MAX_HEIGHT;
if (pix->width > MT9M111_MAX_WIDTH)
pix->width = MT9M111_MAX_WIDTH;

return 0;
}
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20 changes: 11 additions & 9 deletions drivers/media/video/mt9v022.c
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Original file line number Diff line number Diff line change
Expand Up @@ -406,15 +406,17 @@ static int mt9v022_set_fmt(struct soc_camera_device *icd,
static int mt9v022_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
if (f->fmt.pix.height < 32 + icd->y_skip_top)
f->fmt.pix.height = 32 + icd->y_skip_top;
if (f->fmt.pix.height > 480 + icd->y_skip_top)
f->fmt.pix.height = 480 + icd->y_skip_top;
if (f->fmt.pix.width < 48)
f->fmt.pix.width = 48;
if (f->fmt.pix.width > 752)
f->fmt.pix.width = 752;
f->fmt.pix.width &= ~0x03; /* ? */
struct v4l2_pix_format *pix = &f->fmt.pix;

if (pix->height < 32 + icd->y_skip_top)
pix->height = 32 + icd->y_skip_top;
if (pix->height > 480 + icd->y_skip_top)
pix->height = 480 + icd->y_skip_top;
if (pix->width < 48)
pix->width = 48;
if (pix->width > 752)
pix->width = 752;
pix->width &= ~0x03; /* ? */

return 0;
}
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21 changes: 7 additions & 14 deletions drivers/media/video/pxa_camera.c
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Original file line number Diff line number Diff line change
Expand Up @@ -240,8 +240,7 @@ static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
unsigned int *size)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;

dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
Expand All @@ -267,8 +266,7 @@ static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
int i;
Expand Down Expand Up @@ -344,8 +342,7 @@ static int pxa_videobuf_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb, enum v4l2_field field)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
int ret;
Expand Down Expand Up @@ -464,8 +461,7 @@ static void pxa_videobuf_queue(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
struct pxa_buffer *active;
Expand Down Expand Up @@ -915,8 +911,7 @@ static int test_platform_param(struct pxa_camera_dev *pcdev,

static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
{
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
unsigned long dw, bpp, bus_flags, camera_flags, common_flags;
u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0;
Expand Down Expand Up @@ -1298,8 +1293,7 @@ static int pxa_camera_querycap(struct soc_camera_host *ici,

static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state)
{
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
int i = 0, ret = 0;

Expand All @@ -1317,8 +1311,7 @@ static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state)

static int pxa_camera_resume(struct soc_camera_device *icd)
{
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
int i = 0, ret = 0;

Expand Down
74 changes: 43 additions & 31 deletions drivers/media/video/soc_camera.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -98,8 +98,7 @@ static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
enum v4l2_field field;
int ret;

Expand Down Expand Up @@ -163,8 +162,7 @@ static int soc_camera_reqbufs(struct file *file, void *priv,
int ret;
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);

WARN_ON(priv != file->private_data);

Expand Down Expand Up @@ -388,8 +386,7 @@ static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);

if (list_empty(&icf->vb_vidq.stream)) {
dev_err(&icd->dev, "Trying to poll with no queued buffers!\n");
Expand All @@ -415,9 +412,9 @@ static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
__u32 pixfmt = f->fmt.pix.pixelformat;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct v4l2_pix_format *pix = &f->fmt.pix;
__u32 pixfmt = pix->pixelformat;
int ret;
struct v4l2_rect rect;

Expand All @@ -429,9 +426,9 @@ static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,

rect.left = icd->x_current;
rect.top = icd->y_current;
rect.width = f->fmt.pix.width;
rect.height = f->fmt.pix.height;
ret = ici->ops->set_fmt(icd, f->fmt.pix.pixelformat, &rect);
rect.width = pix->width;
rect.height = pix->height;
ret = ici->ops->set_fmt(icd, pix->pixelformat, &rect);
if (ret < 0) {
return ret;
} else if (!icd->current_fmt ||
Expand All @@ -443,7 +440,7 @@ static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,

icd->width = rect.width;
icd->height = rect.height;
icf->vb_vidq.field = f->fmt.pix.field;
icf->vb_vidq.field = pix->field;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n",
f->type);
Expand Down Expand Up @@ -479,16 +476,17 @@ static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct v4l2_pix_format *pix = &f->fmt.pix;

WARN_ON(priv != file->private_data);

f->fmt.pix.width = icd->width;
f->fmt.pix.height = icd->height;
f->fmt.pix.field = icf->vb_vidq.field;
f->fmt.pix.pixelformat = icd->current_fmt->fourcc;
f->fmt.pix.bytesperline = f->fmt.pix.width *
pix->width = icd->width;
pix->height = icd->height;
pix->field = icf->vb_vidq.field;
pix->pixelformat = icd->current_fmt->fourcc;
pix->bytesperline = pix->width *
DIV_ROUND_UP(icd->current_fmt->depth, 8);
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
pix->sizeimage = pix->height * pix->bytesperline;
dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n",
icd->current_fmt->fourcc);
return 0;
Expand All @@ -499,8 +497,7 @@ static int soc_camera_querycap(struct file *file, void *priv,
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);

WARN_ON(priv != file->private_data);

Expand Down Expand Up @@ -651,8 +648,7 @@ static int soc_camera_s_crop(struct file *file, void *fh,
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
int ret;

if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
Expand Down Expand Up @@ -776,13 +772,9 @@ static int scan_add_device(struct soc_camera_device *icd)
static int soc_camera_probe(struct device *dev)
{
struct soc_camera_device *icd = to_soc_camera_dev(dev);
struct soc_camera_host *ici =
to_soc_camera_host(icd->dev.parent);
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
int ret;

if (!icd->ops->probe)
return -ENODEV;

/* We only call ->add() here to activate and probe the camera.
* We shall ->remove() and deactivate it immediately afterwards. */
ret = ici->ops->add(icd);
Expand Down Expand Up @@ -863,7 +855,16 @@ int soc_camera_host_register(struct soc_camera_host *ici)
int ret;
struct soc_camera_host *ix;

if (!ici->ops->init_videobuf || !ici->ops->add || !ici->ops->remove)
if (!ici || !ici->ops ||
!ici->ops->try_fmt ||
!ici->ops->set_fmt ||
!ici->ops->set_bus_param ||
!ici->ops->querycap ||
!ici->ops->init_videobuf ||
!ici->ops->reqbufs ||
!ici->ops->add ||
!ici->ops->remove ||
!ici->ops->poll)
return -EINVAL;

/* Number might be equal to the platform device ID */
Expand Down Expand Up @@ -931,7 +932,16 @@ int soc_camera_device_register(struct soc_camera_device *icd)
struct soc_camera_device *ix;
int num = -1, i;

if (!icd)
if (!icd || !icd->ops ||
!icd->ops->probe ||
!icd->ops->init ||
!icd->ops->release ||
!icd->ops->start_capture ||
!icd->ops->stop_capture ||
!icd->ops->set_fmt ||
!icd->ops->try_fmt ||
!icd->ops->query_bus_param ||
!icd->ops->set_bus_param)
return -EINVAL;

for (i = 0; i < 256 && num < 0; i++) {
Expand All @@ -953,7 +963,9 @@ int soc_camera_device_register(struct soc_camera_device *icd)
icd->dev.bus = &soc_camera_bus_type;
dev_set_name(&icd->dev, "%u-%u", icd->iface, icd->devnum);

icd->dev.release = dummy_release;
icd->dev.release = dummy_release;
icd->use_count = 0;
icd->host_priv = NULL;

return scan_add_device(icd);
}
Expand Down
5 changes: 3 additions & 2 deletions drivers/media/video/soc_camera_platform.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -89,9 +89,10 @@ static int soc_camera_platform_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
struct v4l2_pix_format *pix = &f->fmt.pix;

f->fmt.pix.width = p->format.width;
f->fmt.pix.height = p->format.height;
pix->width = p->format.width;
pix->height = p->format.height;
return 0;
}

Expand Down

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