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5d9955f8a9
The UVC gadget driver borrowed code from the UVC host driver without changing the symbol names. This results in a namespace clash with multiple definitions of several symbols when compiling both drivers in the kernel. Make all generic UVC functions and variables static in the UVC gadget driver, as the symbols are not referenced outside of the gadget driver. Rename the uvc_trace_param global variable to uvc_gadget_trace_param. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
#ifndef _UVC_QUEUE_H_
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#define _UVC_QUEUE_H_
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/poll.h>
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#include <linux/videodev2.h>
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/* Maximum frame size in bytes, for sanity checking. */
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#define UVC_MAX_FRAME_SIZE (16*1024*1024)
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/* Maximum number of video buffers. */
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#define UVC_MAX_VIDEO_BUFFERS 32
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/* ------------------------------------------------------------------------
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* Structures.
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*/
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enum uvc_buffer_state {
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UVC_BUF_STATE_IDLE = 0,
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UVC_BUF_STATE_QUEUED = 1,
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UVC_BUF_STATE_ACTIVE = 2,
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UVC_BUF_STATE_DONE = 3,
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UVC_BUF_STATE_ERROR = 4,
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};
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struct uvc_buffer {
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unsigned long vma_use_count;
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struct list_head stream;
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/* Touched by interrupt handler. */
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struct v4l2_buffer buf;
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struct list_head queue;
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wait_queue_head_t wait;
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enum uvc_buffer_state state;
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};
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#define UVC_QUEUE_STREAMING (1 << 0)
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#define UVC_QUEUE_DISCONNECTED (1 << 1)
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#define UVC_QUEUE_DROP_INCOMPLETE (1 << 2)
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#define UVC_QUEUE_PAUSED (1 << 3)
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struct uvc_video_queue {
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enum v4l2_buf_type type;
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void *mem;
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unsigned int flags;
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__u32 sequence;
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unsigned int count;
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unsigned int buf_size;
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unsigned int buf_used;
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struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
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struct mutex mutex; /* protects buffers and mainqueue */
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spinlock_t irqlock; /* protects irqqueue */
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struct list_head mainqueue;
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struct list_head irqqueue;
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};
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static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
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{
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return queue->flags & UVC_QUEUE_STREAMING;
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}
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#endif /* __KERNEL__ */
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#endif /* _UVC_QUEUE_H_ */
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