diff options
| author | Mats Randgaard <matrandg@cisco.com> | 2013-12-05 10:33:41 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-01-07 06:09:03 -0200 |
| commit | 5474b983c679e3df5ee3c2731c0b685915d5250d (patch) | |
| tree | bbb6dd55d83f6d8fbe8c65855cee83519833ebb9 /drivers/media/i2c | |
| parent | 14d03233517001849742e45803219755430a5eed (diff) | |
[media] adv7604: improve HDMI audio handling
- Mute audio before switching inputs to avoid noise/pops
- Mute audio if audio FIFO over-/underflows (AD Recommended setting)
- Reset FIFO if it over-/underflows (AD Recommended setting)
Signed-off-by: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/i2c')
| -rw-r--r-- | drivers/media/i2c/adv7604.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 442f70a279a..b5dcea8dc43 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -1387,14 +1387,12 @@ static void enable_input(struct v4l2_subdev *sd) struct adv7604_state *state = to_state(sd); if (is_analog_input(sd)) { - /* enable */ io_write(sd, 0x15, 0xb0); /* Disable Tristate of Pins (no audio) */ } else if (is_digital_input(sd)) { - /* enable */ hdmi_write_and_or(sd, 0x00, 0xfc, state->selected_input); - hdmi_write(sd, 0x1a, 0x0a); /* Unmute audio */ hdmi_write(sd, 0x01, 0x00); /* Enable HDMI clock terminators */ io_write(sd, 0x15, 0xa0); /* Disable Tristate of Pins */ + hdmi_write_and_or(sd, 0x1a, 0xef, 0x00); /* Unmute audio */ } else { v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n", __func__, state->selected_input); @@ -1403,9 +1401,9 @@ static void enable_input(struct v4l2_subdev *sd) static void disable_input(struct v4l2_subdev *sd) { - /* disable */ + hdmi_write_and_or(sd, 0x1a, 0xef, 0x10); /* Mute audio */ + msleep(16); /* 512 samples with >= 32 kHz sample rate [REF_03, c. 7.16.10] */ io_write(sd, 0x15, 0xbe); /* Tristate all outputs from video core */ - hdmi_write(sd, 0x1a, 0x1a); /* Mute audio */ hdmi_write(sd, 0x01, 0x78); /* Disable HDMI clock terminators */ } @@ -2044,6 +2042,11 @@ static int adv7604_core_init(struct v4l2_subdev *sd) cp_write(sd, 0xc9, 0x2d); /* use prim_mode and vid_std as free run resolution for digital formats */ + /* HDMI audio */ + hdmi_write_and_or(sd, 0x15, 0xfc, 0x03); /* Mute on FIFO over-/underflow [REF_01, c. 1.2.18] */ + hdmi_write_and_or(sd, 0x1a, 0xf1, 0x08); /* Wait 1 s before unmute */ + hdmi_write_and_or(sd, 0x68, 0xf9, 0x06); /* FIFO reset on over-/underflow [REF_01, c. 1.2.19] */ + /* TODO from platform data */ afe_write(sd, 0xb5, 0x01); /* Setting MCLK to 256Fs */ |