#include <linux/slab.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>
+#include <linux/version.h>
#include <asm/uaccess.h>
#include <linux/videodev2.h>
#include <media/videobuf2-vmalloc.h>
static int ioctl_set_parm(struct file *file, void *fh, struct v4l2_streamparm *fmt);
static int ioctl_queryctl(struct file *file, void *fh, struct v4l2_queryctrl *ctl);
+/* TODO find out exact version where this switched over */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,7,0)
+#define ALLOC_CTX_TYPE void
+#else
+#define ALLOC_CTX_TYPE struct device
+#endif
+
static int queue_setup(struct vb2_queue *vbq, unsigned int *nbuf,
- unsigned int *nplanes, unsigned int *sizes, struct device **alloc_ctx);
+ unsigned int *nplanes, unsigned int *sizes, ALLOC_CTX_TYPE **alloc_ctx);
static int buf_prepare(struct vb2_buffer *vb);
static void buf_queue(struct vb2_buffer *vb);
static int start_streaming(struct vb2_queue *vbq, unsigned int count);
return res;
}
- printk(KERN_INFO "vdummy device initialized\n");
+ printk(KERN_INFO "vdummy: initialized\n");
return 0;
}
}
static int queue_setup(struct vb2_queue *vbq, unsigned int *nbuf,
- unsigned int *nplanes, unsigned int *sizes, struct device **alloc_ctx)
+ unsigned int *nplanes, unsigned int *sizes, ALLOC_CTX_TYPE **alloc_ctx)
{
if(vbq->num_buffers + *nbuf < 2) {
*nbuf = 2 - vbq->num_buffers;
struct buffer *buf = (struct buffer*)((char*)vb - offsetof(struct buffer, vb));
spin_lock(&blist_lock);
+ printk(KERN_INFO "vdummy: enqueue buffer\n");
if(buflist) {
buflist_tail->next = buf;
buflist_tail = buf;
static void clear_queue(enum vb2_buffer_state st)
{
+ struct buffer *list;
+
+ printk(KERN_INFO "vdummy: clear_queue\n");
+
spin_lock(&blist_lock);
- while(buflist) {
- struct buffer *buf = buflist;
- buflist = buflist->next;
- vb2_buffer_done(&buf->vb.vb2_buf, st);
- }
+ list = buflist;
buflist = buflist_tail = 0;
spin_unlock(&blist_lock);
+
+ while(list) {
+ struct buffer *buf = list;
+ list = list->next;
+ vb2_buffer_done(&buf->vb.vb2_buf, st);
+ }
}
static int start_streaming(struct vb2_queue *vbq, unsigned int count)
frame_interval = ktime_set(0, 1000000000ul / (unsigned long)framerate);
}
+ printk(KERN_INFO "vdummy: start streaming (interval: %ld ms)\n",
+ (long)ktime_to_ms(frame_interval));
hrtimer_start(&timer, frame_interval, HRTIMER_MODE_REL);
return 0;
}
static void stop_streaming(struct vb2_queue *vbq)
{
+ printk(KERN_INFO "vdummy: stop streaming\n");
hrtimer_cancel(&timer);
streaming = 0;
struct buffer *buf = 0;
unsigned long flags;
+ printk(KERN_INFO "vdummy: gen_frame\n");
+
spin_lock_irqsave(&blist_lock, flags);
if(buflist) {
buf = buflist;
enum hrtimer_restart timer_func(struct hrtimer *timer)
{
- gen_frame();
+ printk(KERN_INFO "vdummy: timer!\n");
+ //gen_frame();
return streaming ? HRTIMER_RESTART : HRTIMER_NORESTART;
}