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Commit f99c7881 authored by Adrian Knoth's avatar Adrian Knoth Committed by Takashi Iwai
Browse files

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



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

Signed-off-by: default avatarAdrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 34542213

sound/pci/rme9652/hdspm.c

+106 −0
Original line number Diff line number Diff line
@@ -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, \