[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>
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Родитель
14d0323351
Коммит
5474b983c6
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@ -1387,14 +1387,12 @@ static void enable_input(struct v4l2_subdev *sd)
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struct adv7604_state *state = to_state(sd);
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if (is_analog_input(sd)) {
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/* enable */
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io_write(sd, 0x15, 0xb0); /* Disable Tristate of Pins (no audio) */
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} else if (is_digital_input(sd)) {
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/* enable */
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hdmi_write_and_or(sd, 0x00, 0xfc, state->selected_input);
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hdmi_write(sd, 0x1a, 0x0a); /* Unmute audio */
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hdmi_write(sd, 0x01, 0x00); /* Enable HDMI clock terminators */
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io_write(sd, 0x15, 0xa0); /* Disable Tristate of Pins */
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hdmi_write_and_or(sd, 0x1a, 0xef, 0x00); /* Unmute audio */
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} else {
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v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n",
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__func__, state->selected_input);
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@ -1403,9 +1401,9 @@ static void enable_input(struct v4l2_subdev *sd)
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static void disable_input(struct v4l2_subdev *sd)
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{
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/* disable */
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hdmi_write_and_or(sd, 0x1a, 0xef, 0x10); /* Mute audio */
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msleep(16); /* 512 samples with >= 32 kHz sample rate [REF_03, c. 7.16.10] */
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io_write(sd, 0x15, 0xbe); /* Tristate all outputs from video core */
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hdmi_write(sd, 0x1a, 0x1a); /* Mute audio */
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hdmi_write(sd, 0x01, 0x78); /* Disable HDMI clock terminators */
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}
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@ -2044,6 +2042,11 @@ static int adv7604_core_init(struct v4l2_subdev *sd)
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cp_write(sd, 0xc9, 0x2d); /* use prim_mode and vid_std as free run resolution
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for digital formats */
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/* HDMI audio */
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hdmi_write_and_or(sd, 0x15, 0xfc, 0x03); /* Mute on FIFO over-/underflow [REF_01, c. 1.2.18] */
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hdmi_write_and_or(sd, 0x1a, 0xf1, 0x08); /* Wait 1 s before unmute */
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hdmi_write_and_or(sd, 0x68, 0xf9, 0x06); /* FIFO reset on over-/underflow [REF_01, c. 1.2.19] */
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/* TODO from platform data */
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afe_write(sd, 0xb5, 0x01); /* Setting MCLK to 256Fs */
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