From: John Tsiombikas <nuclear@mutantstargoat.com>
Date: Tue, 16 May 2017 06:07:07 +0000 (+0300)
Subject: extra debug messages
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=vdummy;a=commitdiff_plain;h=067acb6f8534df3219afd536d05237cc8ef495c0

extra debug messages
---

diff --git a/vdummy.c b/vdummy.c
index 9786d11..565a6b8 100644
--- a/vdummy.c
+++ b/vdummy.c
@@ -167,7 +167,7 @@ static int init(void)
 		return res;
 	}
 
-	printk(KERN_INFO "vdummy device initialized\n");
+	printk(KERN_INFO "vdummy: initialized\n");
 	return 0;
 }
 
@@ -314,6 +314,7 @@ static void buf_queue(struct vb2_buffer *vb)
 	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;
@@ -326,14 +327,20 @@ static void buf_queue(struct vb2_buffer *vb)
 
 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)
@@ -350,12 +357,15 @@ 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;
@@ -402,6 +412,8 @@ static int gen_frame(void)
 {
 	struct buffer *buf = 0;
 
+	printk(KERN_INFO "vdummy: gen_frame\n");
+
 	spin_lock(&blist_lock);
 	if(buflist) {
 		buf = buflist;
@@ -428,6 +440,7 @@ static int gen_frame(void)
 
 enum hrtimer_restart timer_func(struct hrtimer *timer)
 {
-	gen_frame();
+	printk(KERN_INFO "vdummy: timer!\n");
+	//gen_frame();
 	return streaming ? HRTIMER_RESTART : HRTIMER_NORESTART;
 }