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author | Paul Mundt <lethal@linux-sh.org> | 2012-08-01 13:49:13 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2012-08-01 13:49:13 +0900 |
commit | 91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e (patch) | |
tree | c96ed92413044a28d17783e84a8824bfd2437af1 /drivers/media/video/v4l2-dev.c | |
parent | b9ccfda293ee6fca9a89a1584f0900e0627b975e (diff) | |
parent | 4dc4c51675c137c30838425ecc8d471ff5eb138b (diff) | |
download | linux-3.10-91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e.tar.gz linux-3.10-91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e.tar.bz2 linux-3.10-91ba548cfd5cc8ee93b9435527efb8fa4caf5c5e.zip |
Merge branch 'sh/dmaengine' into sh-latest
Diffstat (limited to 'drivers/media/video/v4l2-dev.c')
-rw-r--r-- | drivers/media/video/v4l2-dev.c | 70 |
1 files changed, 57 insertions, 13 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 0cbada18f6f..07aeafca9ea 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -46,6 +46,29 @@ static ssize_t show_index(struct device *cd, return sprintf(buf, "%i\n", vdev->index); } +static ssize_t show_debug(struct device *cd, + struct device_attribute *attr, char *buf) +{ + struct video_device *vdev = to_video_device(cd); + + return sprintf(buf, "%i\n", vdev->debug); +} + +static ssize_t set_debug(struct device *cd, struct device_attribute *attr, + const char *buf, size_t len) +{ + struct video_device *vdev = to_video_device(cd); + int res = 0; + u16 value; + + res = kstrtou16(buf, 0, &value); + if (res) + return res; + + vdev->debug = value; + return len; +} + static ssize_t show_name(struct device *cd, struct device_attribute *attr, char *buf) { @@ -56,6 +79,7 @@ static ssize_t show_name(struct device *cd, static struct device_attribute video_device_attrs[] = { __ATTR(name, S_IRUGO, show_name, NULL), + __ATTR(debug, 0644, show_debug, set_debug), __ATTR(index, S_IRUGO, show_index, NULL), __ATTR_NULL }; @@ -281,6 +305,9 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf, ret = vdev->fops->read(filp, buf, sz, off); if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); + if (vdev->debug) + printk(KERN_DEBUG "%s: read: %zd (%d)\n", + video_device_node_name(vdev), sz, ret); return ret; } @@ -299,6 +326,9 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf, ret = vdev->fops->write(filp, buf, sz, off); if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); + if (vdev->debug) + printk(KERN_DEBUG "%s: write: %zd (%d)\n", + video_device_node_name(vdev), sz, ret); return ret; } @@ -315,6 +345,9 @@ static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll) ret = vdev->fops->poll(filp, poll); if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); + if (vdev->debug) + printk(KERN_DEBUG "%s: poll: %08x\n", + video_device_node_name(vdev), ret); return ret; } @@ -324,20 +357,14 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) int ret = -ENODEV; if (vdev->fops->unlocked_ioctl) { - bool locked = false; + struct mutex *lock = v4l2_ioctl_get_lock(vdev, cmd); - if (vdev->lock) { - /* always lock unless the cmd is marked as "don't use lock" */ - locked = !v4l2_is_known_ioctl(cmd) || - !test_bit(_IOC_NR(cmd), vdev->disable_locking); - - if (locked && mutex_lock_interruptible(vdev->lock)) - return -ERESTARTSYS; - } + if (lock && mutex_lock_interruptible(lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->unlocked_ioctl(filp, cmd, arg); - if (locked) - mutex_unlock(vdev->lock); + if (lock) + mutex_unlock(lock); } else if (vdev->fops->ioctl) { /* This code path is a replacement for the BKL. It is a major * hack but it will have to do for those drivers that are not @@ -385,12 +412,17 @@ static unsigned long v4l2_get_unmapped_area(struct file *filp, unsigned long flags) { struct video_device *vdev = video_devdata(filp); + int ret; if (!vdev->fops->get_unmapped_area) return -ENOSYS; if (!video_is_registered(vdev)) return -ENODEV; - return vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags); + ret = vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags); + if (vdev->debug) + printk(KERN_DEBUG "%s: get_unmapped_area (%d)\n", + video_device_node_name(vdev), ret); + return ret; } #endif @@ -408,6 +440,9 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm) ret = vdev->fops->mmap(filp, vm); if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); + if (vdev->debug) + printk(KERN_DEBUG "%s: mmap (%d)\n", + video_device_node_name(vdev), ret); return ret; } @@ -443,6 +478,9 @@ static int v4l2_open(struct inode *inode, struct file *filp) } err: + if (vdev->debug) + printk(KERN_DEBUG "%s: open (%d)\n", + video_device_node_name(vdev), ret); /* decrease the refcount in case of an error */ if (ret) video_put(vdev); @@ -462,6 +500,9 @@ static int v4l2_release(struct inode *inode, struct file *filp) if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); } + if (vdev->debug) + printk(KERN_DEBUG "%s: release\n", + video_device_node_name(vdev)); /* decrease the refcount unconditionally since the release() return value is ignored. */ video_put(vdev); @@ -656,7 +697,8 @@ static void determine_valid_ioctls(struct video_device *vdev) SET_VALID_IOCTL(ops, VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd); SET_VALID_IOCTL(ops, VIDIOC_DECODER_CMD, vidioc_decoder_cmd); SET_VALID_IOCTL(ops, VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd); - if (ops->vidioc_g_parm || vdev->vfl_type == VFL_TYPE_GRABBER) + if (ops->vidioc_g_parm || (vdev->vfl_type == VFL_TYPE_GRABBER && + (ops->vidioc_g_std || vdev->tvnorms))) set_bit(_IOC_NR(VIDIOC_G_PARM), valid_ioctls); SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm); SET_VALID_IOCTL(ops, VIDIOC_G_TUNER, vidioc_g_tuner); @@ -688,6 +730,8 @@ static void determine_valid_ioctls(struct video_device *vdev) SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT, vidioc_unsubscribe_event); SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs); SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf); + if (ops->vidioc_enum_freq_bands || ops->vidioc_g_tuner || ops->vidioc_g_modulator) + set_bit(_IOC_NR(VIDIOC_ENUM_FREQ_BANDS), valid_ioctls); bitmap_andnot(vdev->valid_ioctls, valid_ioctls, vdev->valid_ioctls, BASE_VIDIOC_PRIVATE); } |