forked from luck/tmp_suning_uos_patched
[media] media: Documentation: remove V4L2_FL_USE_FH_PRIO flag
The V4L2_FL_USE_FH_PRIO has been removed from the code, now remove it from the documentation. Signed-off-by: Ramakrishnan Muthukrishnan <ramakrmu@cisco.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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@ -675,11 +675,6 @@ You should also set these fields:
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video_device is initialized you *do* know which parent PCI device to use and
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video_device is initialized you *do* know which parent PCI device to use and
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so you set dev_device to the correct PCI device.
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so you set dev_device to the correct PCI device.
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- flags: optional. Set to V4L2_FL_USE_FH_PRIO if you want to let the framework
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handle the VIDIOC_G/S_PRIORITY ioctls. This requires that you use struct
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v4l2_fh. Eventually this flag will disappear once all drivers use the core
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priority handling. But for now it has to be set explicitly.
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If you use v4l2_ioctl_ops, then you should set .unlocked_ioctl to video_ioctl2
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If you use v4l2_ioctl_ops, then you should set .unlocked_ioctl to video_ioctl2
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in your v4l2_file_operations struct.
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in your v4l2_file_operations struct.
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@ -909,8 +904,7 @@ struct v4l2_fh
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struct v4l2_fh provides a way to easily keep file handle specific data
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struct v4l2_fh provides a way to easily keep file handle specific data
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that is used by the V4L2 framework. New drivers must use struct v4l2_fh
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that is used by the V4L2 framework. New drivers must use struct v4l2_fh
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since it is also used to implement priority handling (VIDIOC_G/S_PRIORITY)
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since it is also used to implement priority handling (VIDIOC_G/S_PRIORITY).
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if the video_device flag V4L2_FL_USE_FH_PRIO is also set.
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The users of v4l2_fh (in the V4L2 framework, not the driver) know
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The users of v4l2_fh (in the V4L2 framework, not the driver) know
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whether a driver uses v4l2_fh as its file->private_data pointer by
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whether a driver uses v4l2_fh as its file->private_data pointer by
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@ -883,11 +883,6 @@ static int skeleton_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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vdev->v4l2_dev = &skel->v4l2_dev;
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vdev->v4l2_dev = &skel->v4l2_dev;
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/* Supported SDTV standards, if any */
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/* Supported SDTV standards, if any */
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vdev->tvnorms = SKEL_TVNORMS;
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vdev->tvnorms = SKEL_TVNORMS;
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/* If this bit is set, then the v4l2 core will provide the support
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* for the VIDIOC_G/S_PRIORITY ioctls. This flag will eventually
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* go away once all drivers have been converted to use struct v4l2_fh.
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*/
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set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags);
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video_set_drvdata(vdev, skel);
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video_set_drvdata(vdev, skel);
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ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
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ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
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@ -580,11 +580,6 @@ release()回调必须被设置,且在最后一个 video_device 用户退出之
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v4l2_device 无法与特定的 PCI 设备关联,所有没有设置父设备。但当
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v4l2_device 无法与特定的 PCI 设备关联,所有没有设置父设备。但当
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video_device 配置后,就知道使用哪个父 PCI 设备了。
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video_device 配置后,就知道使用哪个父 PCI 设备了。
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- flags:可选。如果你要让框架处理设置 VIDIOC_G/S_PRIORITY ioctls,
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请设置 V4L2_FL_USE_FH_PRIO。这要求你使用 v4l2_fh 结构体。
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一旦所有驱动使用了核心的优先级处理,最终这个标志将消失。但现在它
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必须被显式设置。
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如果你使用 v4l2_ioctl_ops,则应该在 v4l2_file_operations 结构体中
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如果你使用 v4l2_ioctl_ops,则应该在 v4l2_file_operations 结构体中
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设置 .unlocked_ioctl 指向 video_ioctl2。
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设置 .unlocked_ioctl 指向 video_ioctl2。
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@ -789,7 +784,7 @@ v4l2_fh 结构体
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-------------
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-------------
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v4l2_fh 结构体提供一个保存用于 V4L2 框架的文件句柄特定数据的简单方法。
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v4l2_fh 结构体提供一个保存用于 V4L2 框架的文件句柄特定数据的简单方法。
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如果 video_device 的 flag 设置了 V4L2_FL_USE_FH_PRIO 标志,新驱动
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如果 video_device 标志,新驱动
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必须使用 v4l2_fh 结构体,因为它也用于实现优先级处理(VIDIOC_G/S_PRIORITY)。
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必须使用 v4l2_fh 结构体,因为它也用于实现优先级处理(VIDIOC_G/S_PRIORITY)。
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v4l2_fh 的用户(位于 V4l2 框架中,并非驱动)可通过测试
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v4l2_fh 的用户(位于 V4l2 框架中,并非驱动)可通过测试
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