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ALSA: hdspm - Add ALSA controls to read the TCO LTC state

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This patch adds new ALSA controls to query the LTC state from userspace.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adrian Knoth 2013-03-10 00:37:26 +01:00 committed by Takashi Iwai
parent 345422133a
commit f99c78812f
1 changed files with 106 additions and 0 deletions
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106
sound/pci/rme9652/hdspm.c
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@ -2930,6 +2930,112 @@ static int snd_hdspm_get_autosync_ref(struct snd_kcontrol *kcontrol,
return 0;
}
#define HDSPM_TCO_VIDEO_INPUT_FORMAT(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.access = SNDRV_CTL_ELEM_ACCESS_READ |\
SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
.info = snd_hdspm_info_tco_video_input_format, \
.get = snd_hdspm_get_tco_video_input_format, \
}
static int snd_hdspm_info_tco_video_input_format(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static char *texts[] = {"No video", "NTSC", "PAL"};
ENUMERATED_CTL_INFO(uinfo, texts);
return 0;
}
static int snd_hdspm_get_tco_video_input_format(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
u32 status;
int ret = 0;
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
status = hdspm_read(hdspm, HDSPM_RD_TCO + 4);
switch (status & (HDSPM_TCO1_Video_Input_Format_NTSC |
HDSPM_TCO1_Video_Input_Format_PAL)) {
case HDSPM_TCO1_Video_Input_Format_NTSC:
/* ntsc */
ret = 1;
break;
case HDSPM_TCO1_Video_Input_Format_PAL:
/* pal */
ret = 2;
break;
default:
/* no video */
ret = 0;
break;
}
ucontrol->value.enumerated.item[0] = ret;
return 0;
}
#define HDSPM_TCO_LTC_FRAMES(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \
.access = SNDRV_CTL_ELEM_ACCESS_READ |\
SNDRV_CTL_ELEM_ACCESS_VOLATILE, \
.info = snd_hdspm_info_tco_ltc_frames, \
.get = snd_hdspm_get_tco_ltc_frames, \
}
static int snd_hdspm_info_tco_ltc_frames(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
static char *texts[] = {"No lock", "24 fps", "25 fps", "29.97 fps",
"30 fps"};
ENUMERATED_CTL_INFO(uinfo, texts);
return 0;
}
static int hdspm_tco_ltc_frames(struct hdspm *hdspm)
{
u32 status;
int ret = 0;
status = hdspm_read(hdspm, HDSPM_RD_TCO + 4);
if (status & HDSPM_TCO1_LTC_Input_valid) {
switch (status & (HDSPM_TCO1_LTC_Format_LSB |
HDSPM_TCO1_LTC_Format_MSB)) {
case 0:
/* 24 fps */
ret = 1;
break;
case HDSPM_TCO1_LTC_Format_LSB:
/* 25 fps */
ret = 2;
break;
case HDSPM_TCO1_LTC_Format_MSB:
/* 25 fps */
ret = 3;
break;
default:
/* 30 fps */
ret = 4;
break;
}
}
return ret;
}
static int snd_hdspm_get_tco_ltc_frames(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct hdspm *hdspm = snd_kcontrol_chip(kcontrol);
ucontrol->value.enumerated.item[0] = hdspm_tco_ltc_frames(hdspm);
return 0;
}
#define HDSPM_TOGGLE_SETTING(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
.name = xname, \