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: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 106 insertions, 0 deletions

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 8b7c9fb901c7..e23572dd0e46 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -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, \