avsync: spdif: fix the avsync for ms12 [1/4]

PD#SWPL-5837

Problem:
dtv is out of avsync when dolby ms12 certificate

Solution:
when the audio is played, recalculate the apts to sync
pcrsrc when pcrmaster.

Verify:
X301

Change-Id: I199383aa1c0de1b4f0ec646d9d066910b3bb2b42
Signed-off-by: Xiaoming Sui <xiaoming.sui@amlogic.com>

avsync: tsync: fix the avsync for ms12 [3/4]

PD#SWPL-5837

Problem:
dtv is out of avsync when dolby ms12 certificate

Solution:
when the audio is played, recalculate the apts to sync
pcrsrc when pcrmaster.

Verify:
X301

Change-Id: Ia121e57ad69c5b0d211e14bf3a61f165457e54c7
Signed-off-by: Xiaoming Sui <xiaoming.sui@amlogic.com>

drivers/amlogic/media/frame_sync/timestamp.c

@@ -136,6 +136,19 @@ u32 timestamp_pcrscr_get(void)
 }
 EXPORT_SYMBOL(timestamp_pcrscr_get);
 
+void timestamp_set_pcrlatency(u32 latency)
+{
+	if (latency < 500 * 90)
+		pcrscr_lantcy = latency;
+}
+EXPORT_SYMBOL(timestamp_set_pcrlatency);
+
+u32 timestamp_get_pcrlatency(void)
+{
+	return pcrscr_lantcy;
+}
+EXPORT_SYMBOL(timestamp_get_pcrlatency);
+
 u32 timestamp_tsdemux_pcr_get(void)
 {
 	if (tsdemux_pcrscr_get_cb)

drivers/amlogic/media/frame_sync/tsync.c

@@ -1999,6 +1999,25 @@ static ssize_t show_startsync_mode(struct class *class,
 	return sprintf(buf, "0x%x\n", tsync_get_startsync_mode());
 }
 
+static ssize_t show_latency(struct class *class,
+		struct class_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%u\n", timestamp_get_pcrlatency());
+}
+
+static ssize_t store_latency(struct class *class,
+	struct class_attribute *attr,
+	const char *buf, size_t size)
+{
+	unsigned int latency = 0;
+	ssize_t r;
+
+	r = kstrtoint(buf, 0, &latency);
+	if (r != 0)
+		return -EINVAL;
+	timestamp_set_pcrlatency(latency);
+	return size;
+}
 
 static ssize_t show_apts_lookup(struct class *class,
 	struct class_attribute *attrr, char *buf)
@@ -2088,6 +2107,7 @@ static struct class_attribute tsync_class_attrs[] = {
 	NULL),
 	__ATTR(checkin_firstapts, 0644, show_checkin_firstapts,
 	NULL),
+	__ATTR(pts_latency, 0664, show_latency, store_latency),
 	__ATTR_NULL
 };
 

include/linux/amlogic/media/frame_sync/tsync.h

@@ -157,6 +157,9 @@ extern int tsync_set_av_threshold_max(int max);
 
 extern void set_pts_realign(void);
 
+extern void timestamp_set_pcrlatency(u32 latency);
+extern u32 timestamp_get_pcrlatency(void);
+
 static inline u32 tsync_vpts_discontinuity_margin(void)
 {
 	return tsync_get_av_threshold_min();