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-rw-r--r--drivers/media/video/v4l1-compat.c54
1 files changed, 41 insertions, 13 deletions
diff --git a/drivers/media/video/v4l1-compat.c b/drivers/media/video/v4l1-compat.c
index efb67d29fc0..ede8543818b 100644
--- a/drivers/media/video/v4l1-compat.c
+++ b/drivers/media/video/v4l1-compat.c
@@ -616,6 +616,8 @@ v4l_compat_translate_ioctl(struct inode *inode,
case VIDIOCSPICT: /* set tone controls & partial capture format */
{
struct video_picture *pict = arg;
+ int mem_err = 0, ovl_err = 0;
+
memset(&fbuf2, 0, sizeof(fbuf2));
set_v4l_control(inode, file,
@@ -628,33 +630,59 @@ v4l_compat_translate_ioctl(struct inode *inode,
V4L2_CID_SATURATION, pict->colour, drv);
set_v4l_control(inode, file,
V4L2_CID_WHITENESS, pict->whiteness, drv);
+ /*
+ * V4L1 uses this ioctl to set both memory capture and overlay
+ * pixel format, while V4L2 has two different ioctls for this.
+ * Some cards may not support one or the other, and may support
+ * different pixel formats for memory vs overlay.
+ */
fmt2 = kzalloc(sizeof(*fmt2),GFP_KERNEL);
fmt2->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
err = drv(inode, file, VIDIOC_G_FMT, fmt2);
- if (err < 0)
+ /* If VIDIOC_G_FMT failed, then the driver likely doesn't
+ support memory capture. Trying to set the memory capture
+ parameters would be pointless. */
+ if (err < 0) {
dprintk("VIDIOCSPICT / VIDIOC_G_FMT: %d\n",err);
- if (fmt2->fmt.pix.pixelformat !=
- palette_to_pixelformat(pict->palette)) {
+ mem_err = -1000; /* didn't even try */
+ } else if (fmt2->fmt.pix.pixelformat !=
+ palette_to_pixelformat(pict->palette)) {
fmt2->fmt.pix.pixelformat = palette_to_pixelformat(
pict->palette);
- err = drv(inode, file, VIDIOC_S_FMT, fmt2);
- if (err < 0)
- dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",err);
+ mem_err = drv(inode, file, VIDIOC_S_FMT, fmt2);
+ if (mem_err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_S_FMT: %d\n",
+ mem_err);
}
err = drv(inode, file, VIDIOC_G_FBUF, &fbuf2);
- if (err < 0)
+ /* If VIDIOC_G_FBUF failed, then the driver likely doesn't
+ support overlay. Trying to set the overlay parameters
+ would be quite pointless. */
+ if (err < 0) {
dprintk("VIDIOCSPICT / VIDIOC_G_FBUF: %d\n",err);
- if (fbuf2.fmt.pixelformat !=
- palette_to_pixelformat(pict->palette)) {
+ ovl_err = -1000; /* didn't even try */
+ } else if (fbuf2.fmt.pixelformat !=
+ palette_to_pixelformat(pict->palette)) {
fbuf2.fmt.pixelformat = palette_to_pixelformat(
pict->palette);
- err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
- if (err < 0)
- dprintk("VIDIOCSPICT / VIDIOC_S_FBUF: %d\n",err);
- err = 0; /* likely fails for non-root */
+ ovl_err = drv(inode, file, VIDIOC_S_FBUF, &fbuf2);
+ if (ovl_err < 0)
+ dprintk("VIDIOCSPICT / VIDIOC_S_FBUF: %d\n",
+ ovl_err);
}
+ if (ovl_err < 0 && mem_err < 0)
+ /* ioctl failed, couldn't set either parameter */
+ if (mem_err != -1000) {
+ err = mem_err;
+ } else if (ovl_err == -EPERM) {
+ err = 0;
+ } else {
+ err = ovl_err;
+ }
+ else
+ err = 0;
break;
}
case VIDIOCGTUNER: /* get tuner information */