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Subject[PATCH 023/141] V4L/DVB (3422): Implemented VIDIOC_G_FMT/S_FMT for sliced VBI
Date
From: Mauro Carvalho Chehab <mchehab@infradead.org>
Date: 1138043468 -0200

- Implemented VIDIOC_G_FMT/S_FMT for sliced VBI
- VIDIOC_S_FMT now calls a function

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index e4e82ae..d8d02c4 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -897,7 +897,6 @@ static int em28xx_set_norm(struct em28xx
return 0;
}

-
static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
{
em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
@@ -909,7 +908,9 @@ static int em28xx_get_fmt(struct em28xx
"V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
"not supported");

- if (format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ switch (format->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ {
format->fmt.pix.width = dev->width;
format->fmt.pix.height = dev->height;
format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
@@ -920,12 +921,161 @@ static int em28xx_get_fmt(struct em28xx

em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
dev->height);
- return 0;
+ break;
}

- return -EINVAL;
+ case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+ {
+ format->fmt.sliced.service_set=0;
+
+ em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
+
+ if (format->fmt.sliced.service_set==0)
+ return -EINVAL;
+
+ break;
+ }
+
+ default:
+ return -EINVAL;
+ }
+ return (0);
}

+static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
+{
+ u32 i;
+ int ret = 0;
+ int width = format->fmt.pix.width;
+ int height = format->fmt.pix.height;
+ unsigned int hscale, vscale;
+ unsigned int maxh, maxw;
+
+ maxw = norm_maxw(dev);
+ maxh = norm_maxh(dev);
+
+ em28xx_videodbg("%s: type=%s\n",
+ cmd == VIDIOC_TRY_FMT ?
+ "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
+ format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
+ "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
+ format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
+ "V4L2_BUF_TYPE_VBI_CAPTURE " :
+ "not supported");
+
+ if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
+ em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
+
+ if (format->fmt.sliced.service_set==0)
+ return -EINVAL;
+
+ return 0;
+ }
+
+
+ if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ em28xx_videodbg("%s: requested %dx%d\n",
+ cmd == VIDIOC_TRY_FMT ?
+ "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
+ format->fmt.pix.width, format->fmt.pix.height);
+
+ /* FIXME: Move some code away from here */
+ /* width must even because of the YUYV format */
+ /* height must be even because of interlacing */
+ height &= 0xfffe;
+ width &= 0xfffe;
+
+ if (height < 32)
+ height = 32;
+ if (height > maxh)
+ height = maxh;
+ if (width < 48)
+ width = 48;
+ if (width > maxw)
+ width = maxw;
+
+ if(dev->is_em2800){
+ /* the em2800 can only scale down to 50% */
+ if(height % (maxh / 2))
+ height=maxh;
+ if(width % (maxw / 2))
+ width=maxw;
+ /* according to empiatech support */
+ /* the MaxPacketSize is to small to support */
+ /* framesizes larger than 640x480 @ 30 fps */
+ /* or 640x576 @ 25 fps. As this would cut */
+ /* of a part of the image we prefer */
+ /* 360x576 or 360x480 for now */
+ if(width == maxw && height == maxh)
+ width /= 2;
+ }
+
+ if ((hscale =
+ (((unsigned long)maxw) << 12) / width - 4096L) >=
+ 0x4000)
+ hscale = 0x3fff;
+ width =
+ (((unsigned long)maxw) << 12) / (hscale + 4096L);
+
+ if ((vscale =
+ (((unsigned long)maxh) << 12) / height - 4096L) >=
+ 0x4000)
+ vscale = 0x3fff;
+ height =
+ (((unsigned long)maxh) << 12) / (vscale + 4096L);
+
+ format->fmt.pix.width = width;
+ format->fmt.pix.height = height;
+ format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ format->fmt.pix.bytesperline = width * 2;
+ format->fmt.pix.sizeimage = width * 2 * height;
+ format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+ format->fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
+ cmd ==
+ VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
+ "VIDIOC_S_FMT", format->fmt.pix.width,
+ format->fmt.pix.height, hscale, vscale);
+
+ if (cmd == VIDIOC_TRY_FMT)
+ return 0;
+
+ for (i = 0; i < dev->num_frames; i++)
+ if (dev->frame[i].vma_use_count) {
+ em28xx_videodbg("VIDIOC_S_FMT failed. "
+ "Unmap the buffers first.\n");
+ return -EINVAL;
+ }
+
+ /* stop io in case it is already in progress */
+ if (dev->stream == STREAM_ON) {
+ em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
+ if ((ret = em28xx_stream_interrupt(dev)))
+ return ret;
+ }
+
+ em28xx_release_buffers(dev);
+ dev->io = IO_NONE;
+
+ /* set new image size */
+ dev->width = width;
+ dev->height = height;
+ dev->frame_size = dev->width * dev->height * 2;
+ dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
+ dev->bytesperline = dev->width * 2;
+ dev->hscale = hscale;
+ dev->vscale = vscale;
+ em28xx_uninit_isoc(dev);
+ em28xx_set_alternate(dev);
+ em28xx_capture_start(dev, 1);
+ em28xx_resolution_set(dev);
+ em28xx_init_isoc(dev);
+
+ return 0;
+}

/*
* em28xx_v4l2_do_ioctl()
@@ -983,24 +1133,6 @@ static int em28xx_do_ioctl(struct inode

em28xx_set_norm(dev, dev->width, dev->height);

-/*
- dev->width=norm_maxw(dev);
- dev->height=norm_maxh(dev);
- dev->frame_size=dev->width*dev->height*2;
- dev->field_size=dev->frame_size>>1;
- dev->bytesperline=dev->width*2;
- dev->hscale=0;
- dev->vscale=0;
-
- em28xx_resolution_set(dev);
-*/
-/*
- em28xx_uninit_isoc(dev);
- em28xx_set_alternate(dev);
- em28xx_capture_start(dev, 1);
- em28xx_resolution_set(dev);
- em28xx_init_isoc(dev);
-*/
em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
&tvnorms[i].mode);
em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
@@ -1396,138 +1528,8 @@ static int em28xx_video_do_ioctl(struct

case VIDIOC_TRY_FMT:
case VIDIOC_S_FMT:
- {
- struct v4l2_format *format = arg;
- u32 i;
- int ret = 0;
- int width = format->fmt.pix.width;
- int height = format->fmt.pix.height;
- unsigned int hscale, vscale;
- unsigned int maxh, maxw;
-
- maxw = norm_maxw(dev);
- maxh = norm_maxh(dev);
-
-/* int both_fields; */
-
- em28xx_videodbg("%s: type=%s\n",
- cmd ==
- VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
- "VIDIOC_S_FMT",
- format->type ==
- V4L2_BUF_TYPE_VIDEO_CAPTURE ?
- "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
- V4L2_BUF_TYPE_VBI_CAPTURE ?
- "V4L2_BUF_TYPE_VBI_CAPTURE " :
- "not supported");
-
- if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- em28xx_videodbg("%s: requested %dx%d\n",
- cmd ==
- VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
- "VIDIOC_S_FMT", format->fmt.pix.width,
- format->fmt.pix.height);
-
- /* FIXME: Move some code away from here */
- /* width must even because of the YUYV format */
- /* height must be even because of interlacing */
- height &= 0xfffe;
- width &= 0xfffe;
-
- if (height < 32)
- height = 32;
- if (height > maxh)
- height = maxh;
- if (width < 48)
- width = 48;
- if (width > maxw)
- width = maxw;
-
- if(dev->is_em2800){
- /* the em2800 can only scale down to 50% */
- if(height % (maxh / 2))
- height=maxh;
- if(width % (maxw / 2))
- width=maxw;
- /* according to empiatech support */
- /* the MaxPacketSize is to small to support */
- /* framesizes larger than 640x480 @ 30 fps */
- /* or 640x576 @ 25 fps. As this would cut */
- /* of a part of the image we prefer */
- /* 360x576 or 360x480 for now */
- if(width == maxw && height == maxh)
- width /= 2;
- }
-
- if ((hscale =
- (((unsigned long)maxw) << 12) / width - 4096L) >=
- 0x4000)
- hscale = 0x3fff;
- width =
- (((unsigned long)maxw) << 12) / (hscale + 4096L);
-
- if ((vscale =
- (((unsigned long)maxh) << 12) / height - 4096L) >=
- 0x4000)
- vscale = 0x3fff;
- height =
- (((unsigned long)maxh) << 12) / (vscale + 4096L);
-
- format->fmt.pix.width = width;
- format->fmt.pix.height = height;
- format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
- format->fmt.pix.bytesperline = width * 2;
- format->fmt.pix.sizeimage = width * 2 * height;
- format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
- format->fmt.pix.field = V4L2_FIELD_INTERLACED;
-
- em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
- cmd ==
- VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
- "VIDIOC_S_FMT", format->fmt.pix.width,
- format->fmt.pix.height, hscale, vscale);
-
- if (cmd == VIDIOC_TRY_FMT)
- return 0;
-
- for (i = 0; i < dev->num_frames; i++)
- if (dev->frame[i].vma_use_count) {
- em28xx_videodbg("VIDIOC_S_FMT failed. "
- "Unmap the buffers first.\n");
- return -EINVAL;
- }
-
- /* stop io in case it is already in progress */
- if (dev->stream == STREAM_ON) {
- em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
- if ((ret = em28xx_stream_interrupt(dev)))
- return ret;
- }
-
- em28xx_release_buffers(dev);
- dev->io = IO_NONE;
-
- /* set new image size */
- dev->width = width;
- dev->height = height;
- dev->frame_size = dev->width * dev->height * 2;
- dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
- dev->bytesperline = dev->width * 2;
- dev->hscale = hscale;
- dev->vscale = vscale;
-/* dev->both_fileds = both_fileds; */
- em28xx_uninit_isoc(dev);
- em28xx_set_alternate(dev);
- em28xx_capture_start(dev, 1);
- em28xx_resolution_set(dev);
- em28xx_init_isoc(dev);
-
- return 0;
- }
+ return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);

- /* --- streaming capture ------------------------------------- */
case VIDIOC_REQBUFS:
{
struct v4l2_requestbuffers *rb = arg;
-
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