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V4L/DVB (4872): Saa7134-alsa improvements

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The change does the following:
- At device open, it sets the recording source to the current
  input instead of LINE2. So it is no longer necessary to set the
  recording source with a mixer application.
- Connects the mixer volume control to the input sensitivity selection
  of the analog sound inputs. This allows only one 6db step.

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hartmut Hackmann 2006-11-21 19:59:27 -03:00 committed by Mauro Carvalho Chehab
parent 444dadc439
commit 5cfbacd0d3
1 changed files with 54 additions and 9 deletions
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63
drivers/media/video/saa7134/saa7134-alsa.c
View file

@ -1,10 +1,6 @@
/*
* SAA713x ALSA support for V4L
*
*
* Caveats:
* - Volume doesn't work (it's always at max)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2
@ -614,13 +610,18 @@ static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
snd_card_saa7134_pcm_t *pcm;
snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
struct saa7134_dev *dev = saa7134->dev;
int err;
int amux, err;
mutex_lock(&dev->dmasound.lock);
dev->dmasound.read_count = 0;
dev->dmasound.read_offset = 0;
amux = dev->input->amux;
if ((amux < 1) || (amux > 3))
amux = 1;
dev->dmasound.input = amux - 1;
mutex_unlock(&dev->dmasound.lock);
pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
@ -713,6 +714,8 @@ static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
struct snd_ctl_elem_value * ucontrol)
{
snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
struct saa7134_dev *dev = chip->dev;
int change, addr = kcontrol->private_value;
int left, right;
@ -727,10 +730,52 @@ static int snd_saa7134_volume_put(struct snd_kcontrol * kcontrol,
if (right > 20)
right = 20;
spin_lock_irq(&chip->mixer_lock);
change = chip->mixer_volume[addr][0] != left ||
chip->mixer_volume[addr][1] != right;
chip->mixer_volume[addr][0] = left;
chip->mixer_volume[addr][1] = right;
change = 0;
if (chip->mixer_volume[addr][0] != left) {
change = 1;
right = left;
}
if (chip->mixer_volume[addr][1] != right) {
change = 1;
left = right;
}
if (change) {
switch (dev->pci->device) {
case PCI_DEVICE_ID_PHILIPS_SAA7134:
switch (addr) {
case MIXER_ADDR_TVTUNER:
left = 20;
break;
case MIXER_ADDR_LINE1:
saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
(left > 10) ? 0x00 : 0x10);
break;
case MIXER_ADDR_LINE2:
saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
(left > 10) ? 0x00 : 0x20);
break;
}
break;
case PCI_DEVICE_ID_PHILIPS_SAA7133:
case PCI_DEVICE_ID_PHILIPS_SAA7135:
switch (addr) {
case MIXER_ADDR_TVTUNER:
left = 20;
break;
case MIXER_ADDR_LINE1:
saa_andorb(0x0594, 0x10,
(left > 10) ? 0x00 : 0x10);
break;
case MIXER_ADDR_LINE2:
saa_andorb(0x0594, 0x20,
(left > 10) ? 0x00 : 0x20);
break;
}
break;
}
chip->mixer_volume[addr][0] = left;
chip->mixer_volume[addr][1] = right;
}
spin_unlock_irq(&chip->mixer_lock);
return change;
}