[media] vb2: Add videobuf2-dvb support

With the new vb2_thread_start/stop core code it is very easy to implement
videobuf2-dvb. This should simplify converting existing videobuf drivers to
vb2.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/include/media/videobuf2-dvb.h b/include/media/videobuf2-dvb.h
new file mode 100644
index 000000000000..8f61456f1394
--- /dev/null
+++ b/include/media/videobuf2-dvb.h
@@ -0,0 +1,58 @@
+#ifndef _VIDEOBUF2_DVB_H_
+#define _VIDEOBUF2_DVB_H_
+
+#include <dvbdev.h>
+#include <dmxdev.h>
+#include <dvb_demux.h>
+#include <dvb_net.h>
+#include <dvb_frontend.h>
+#include <media/videobuf2-core.h>
+
+struct vb2_dvb {
+        /* filling that the job of the driver */
+        char                    *name;
+        struct dvb_frontend     *frontend;
+        struct vb2_queue        dvbq;
+
+        /* video-buf-dvb state info */
+        struct mutex            lock;
+        int                     nfeeds;
+
+        /* vb2_dvb_(un)register manages this */
+        struct dvb_demux        demux;
+        struct dmxdev           dmxdev;
+        struct dmx_frontend     fe_hw;
+        struct dmx_frontend     fe_mem;
+        struct dvb_net          net;
+};
+
+struct vb2_dvb_frontend {
+        struct list_head felist;
+        int id;
+        struct vb2_dvb dvb;
+};
+
+struct vb2_dvb_frontends {
+        struct list_head felist;
+        struct mutex lock;
+        struct dvb_adapter adapter;
+        int active_fe_id; /* Indicates which frontend in the felist is in use */
+        int gate; /* Frontend with gate control 0=!MFE,1=fe0,2=fe1 etc */
+};
+
+int vb2_dvb_register_bus(struct vb2_dvb_frontends *f,
+                         struct module *module,
+                         void *adapter_priv,
+                         struct device *device,
+                         short *adapter_nr,
+                         int mfe_shared);
+
+void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f);
+
+struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(struct vb2_dvb_frontends *f, int id);
+void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f);
+
+struct vb2_dvb_frontend *vb2_dvb_get_frontend(struct vb2_dvb_frontends *f, int id);
+int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f, struct dvb_frontend *p);
+
+#endif                  /* _VIDEOBUF2_DVB_H_ */