Re-add the sample-rate quirk originally implemented by Dmitry
Panchenko for the DJM-900NXS2 but for the DJM-750. This commit only
adds it again for the DJM-750 since I can only verify that it is
absolutely required for this device. Other models may need this patch
but I'm hesitant to add them as I cannot test.
The 'wIndex' is passed literally in the function call as we cannot
derive this from 'fmt->sync_ep' due to it not being set. We can change
this if and when we revisit implicit FB.
Signed-off-by: Olivia Mackintosh <livvy@xxxxxxx>
---
sound/usb/quirks.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index e196e364cef1..b49a66f863f3 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1470,6 +1470,23 @@ static void set_format_emu_quirk(struct snd_usb_substream *subs,
subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
}
+static int pioneer_djm_set_format_quirk(struct snd_usb_substream *subs,
+ u16 windex)
+{
+ unsigned int cur_rate = subs->data_endpoint->cur_rate;
+ u8 sr[3];
+ // Convert to little endian
+ sr[0] = cur_rate&0xff;
+ sr[1] = (cur_rate>>8)&0xff;
+ sr[2] = (cur_rate>>16)&0xff;
+ usb_set_interface(subs->dev, 0, 1);
+ // we should derive windex from fmt-sync_ep but it's not set
+ snd_usb_ctl_msg(subs->stream->chip->dev,
+ usb_rcvctrlpipe(subs->stream->chip->dev, 0),
+ 0x01, 0x22, 0x0100, windex, &sr, 0x0003);
+ return 0;
+}
+
void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
const struct audioformat *fmt)
{
@@ -1483,6 +1500,9 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
subs->stream_offset_adj = 2;
break;
+ case USB_ID(0x08e4, 0x017f): /* Pioneer DJM-750 */
+ pioneer_djm_set_format_quirk(subs, 0x0086);
+ break;
}
}
--
2.30.0
