[PATCH v2] ALSA: usb-audio: disable 96khz support for HUAWEI USB-C HEADSET

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The HUAWEI USB-C headset (VID:0x12d1, PID:0x3a07) reported it supports
96khz. However there will be some random issue under 96khz.
Not sure if there is any alternate setting could be applied.
Hence 48khz is suggested to be applied at this moment.

Signed-off-by: Macpaul Lin <macpaul.lin@xxxxxxxxxxxx>
Signed-off-by: Eddie Hung <eddie.hung@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
Changes for v2:
  - Fix build error.
  - Add Cc: stable@xxxxxxxxxxxxxxx

 sound/usb/format.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/usb/format.c b/sound/usb/format.c
index 1b28d01..7a4837b 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -202,6 +202,7 @@ static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audiof
 		fp->rate_min = fp->rate_max = 0;
 		for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
 			unsigned int rate = combine_triple(&fmt[idx]);
+			struct usb_device *udev = chip->dev;
 			if (!rate)
 				continue;
 			/* C-Media CM6501 mislabels its 96 kHz altsetting */
@@ -217,6 +218,11 @@ static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audiof
 			    (chip->usb_id == USB_ID(0x041e, 0x4064) ||
 			     chip->usb_id == USB_ID(0x041e, 0x4068)))
 				rate = 8000;
+			/* Huawei headset can't support 96kHz fully */
+			if (rate == 96000 &&
+			    chip->usb_id == USB_ID(0x12d1, 0x3a07) &&
+			    le16_to_cpu(udev->descriptor.bcdDevice) == 0x49)
+				continue;
 
 			fp->rate_table[fp->nr_rates] = rate;
 			if (!fp->rate_min || rate < fp->rate_min)
-- 
1.7.9.5




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux