drivers/media/pci/cx18/cx18-streams.h

Source file repositories/reference/linux-study-clean/drivers/media/pci/cx18/cx18-streams.h

File Facts

System
Linux kernel
Corpus path
drivers/media/pci/cx18/cx18-streams.h
Extension
.h
Size
1510 bytes
Lines
49
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

u32 cx18_find_handle(struct cx18 *cx);
struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
int cx18_streams_setup(struct cx18 *cx);
int cx18_streams_register(struct cx18 *cx);
void cx18_streams_cleanup(struct cx18 *cx, int unregister);

#define CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN (3)
void cx18_stream_rotate_idx_mdls(struct cx18 *cx);

static inline bool cx18_stream_enabled(struct cx18_stream *s)
{
	return s->video_dev.v4l2_dev ||
	       (s->dvb && s->dvb->enabled) ||
	       (s->type == CX18_ENC_STREAM_TYPE_IDX &&
		s->cx->stream_buffers[CX18_ENC_STREAM_TYPE_IDX] != 0);
}

/* Related to submission of mdls to firmware */
static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
{
	schedule_work(&s->out_work_order);
}

static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
					  struct cx18_mdl *mdl)
{
	/* Put mdl on q_free; the out work handler will move mdl(s) to q_busy */
	cx18_enqueue(s, mdl, &s->q_free);
	cx18_stream_load_fw_queue(s);
}

void cx18_out_work_handler(struct work_struct *work);

/* Capture related */
int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);

void cx18_stop_all_captures(struct cx18 *cx);

Annotation

Implementation Notes