From: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
To avoid short frames on stream start, keep output pins at high impedance
while we are not properly locked onto the input signal.
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
drivers/media/i2c/tvp5150.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 85c5c73098fa..627f8bb58074 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -51,6 +51,7 @@ struct tvp5150 {
v4l2_std_id detected_norm;
u32 input;
u32 output;
+ u32 oe;
int enable;
bool lock;
};
@@ -809,8 +810,11 @@ static irqreturn_t tvp5150_isr(int irq, void *dev_id)
if (status) {
regmap_write(map, TVP5150_INT_STATUS_REG_A, status);
- if (status & TVP5150_INT_A_LOCK)
+ if (status & TVP5150_INT_A_LOCK) {
decoder->lock = !!(status & TVP5150_INT_A_LOCK_STATUS);
+ regmap_update_bits(decoder->regmap, TVP5150_MISC_CTL,
+ 0xd, decoder->lock ? decoder->oe : 0);
+ }
return IRQ_HANDLED;
}
@@ -841,6 +845,7 @@ static int tvp5150_enable(struct v4l2_subdev *sd)
0x7, 0x7);
/* disable HSYNC, VSYNC/PALI, AVID, and FID/GLCO */
regmap_update_bits(decoder->regmap, TVP5150_MISC_CTL, 0x4, 0x0);
+ decoder->oe = 0x9;
break;
case V4L2_MBUS_PARALLEL:
/* 8-bit YUV 4:2:2 */
@@ -848,6 +853,7 @@ static int tvp5150_enable(struct v4l2_subdev *sd)
0x7, 0x0);
/* enable HSYNC, VSYNC/PALI, AVID, and FID/GLCO */
regmap_update_bits(decoder->regmap, TVP5150_MISC_CTL, 0x4, 0x4);
+ decoder->oe = 0xd;
break;
default:
return -EINVAL;
@@ -994,9 +1000,9 @@ static int tvp5150_s_stream(struct v4l2_subdev *sd, int enable)
struct tvp5150 *decoder = container_of(sd, struct tvp5150, sd);
if (enable) {
- /* Enable YUV(OUT7:0), clock */
+ /* Enable YUV(OUT7:0), (SYNC), clock signal, if locked */
regmap_update_bits(decoder->regmap, TVP5150_MISC_CTL, 0xd,
- (decoder->bus_type == V4L2_MBUS_BT656) ? 0x9 : 0xd);
+ decoder->lock ? decoder->oe : 0);
if (decoder->irq) {
/* Enable lock interrupt */
regmap_update_bits(decoder->regmap,
--
2.6.2
--
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