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authorNicola Lunghi <nick83ola@gmail.com>2019-07-07 09:27:34 +0100
committerTakashi Iwai <tiwai@suse.de>2019-07-07 11:27:32 +0200
commitd4bd30532688558a7de70f0c8edd2a7a25c3963f (patch)
tree38566ef29bf21dfeff48fa188fed8cfb1f5cc33d /sound/usb
parentba18ca2b8e18146228ff36b50f0c9a3f5c5bd1b5 (diff)
ALSA: usb-audio: fix Line6 Helix audio format rates
Line6 Helix and HX stomp devices don't support retrieving the number of clock sample rate. Add a quirk to set it to 48Khz by default. [ fixed wrong variable initialization changes by tiwai ] Signed-off-by: Nicola Lunghi <nick83ola@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/format.c46
1 files changed, 43 insertions, 3 deletions
diff --git a/sound/usb/format.c b/sound/usb/format.c
index 3ee7d6f853b7..c391ae03a07b 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -298,6 +298,33 @@ static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
return nr_rates;
}
+/* Line6 Helix series don't support the UAC2_CS_RANGE usb function
+ * call. Return a static table of known clock rates.
+ */
+static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
+ struct audioformat *fp)
+{
+ switch (chip->usb_id) {
+ case USB_ID(0x0E41, 0x4241): /* Line6 Helix */
+ case USB_ID(0x0E41, 0x4242): /* Line6 Helix Rack */
+ case USB_ID(0x0E41, 0x4244): /* Line6 Helix LT */
+ case USB_ID(0x0E41, 0x4246): /* Line6 HX-Stomp */
+ /* supported rates: 48Khz */
+ kfree(fp->rate_table);
+ fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
+ if (!fp->rate_table)
+ return -ENOMEM;
+ fp->nr_rates = 1;
+ fp->rate_min = 48000;
+ fp->rate_max = 48000;
+ fp->rates = SNDRV_PCM_RATE_48000;
+ fp->rate_table[0] = 48000;
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
/*
* parse the format descriptor and stores the possible sample rates
* on the audioformat table (audio class v2 and v3).
@@ -307,7 +334,7 @@ static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
{
struct usb_device *dev = chip->dev;
unsigned char tmp[2], *data;
- int nr_triplets, data_size, ret = 0;
+ int nr_triplets, data_size, ret = 0, ret_l6;
int clock = snd_usb_clock_find_source(chip, fp->protocol,
fp->clock, false);
@@ -326,9 +353,22 @@ static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
tmp, sizeof(tmp));
if (ret < 0) {
- dev_err(&dev->dev,
- "%s(): unable to retrieve number of sample rates (clock %d)\n",
+ /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
+ ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
+ if (ret_l6 == -ENODEV) {
+ /* no line6 device found continue showing the error */
+ dev_err(&dev->dev,
+ "%s(): unable to retrieve number of sample rates (clock %d)\n",
+ __func__, clock);
+ goto err;
+ }
+ if (ret_l6 == 0) {
+ dev_info(&dev->dev,
+ "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
__func__, clock);
+ return 0;
+ }
+ ret = ret_l6;
goto err;
}