On Sat, Apr 14, 2018 at 6:24 AM, Ruslan Bilovol ruslan.bilovol@gmail.com wrote:
Recently released USB Audio Class 3.0 specification contains BADD (Basic Audio Device Definition) document which describes pre-defined UAC3 configurations.
BADD support is mandatory for UAC3 devices, it should be implemented as a separate USB device configuration. As per BADD document, class-specific descriptors shall not be included in the Device’s Configuration descriptor ("inferred"), but host can guess them from BADD profile number, number of endpoints and their max packed sizes.
This patch adds support of all BADD profiles from the spec
Signed-off-by: Ruslan Bilovol ruslan.bilovol@gmail.com
sound/usb/card.c | 14 +++ sound/usb/clock.c | 9 +- sound/usb/mixer.c | 313 +++++++++++++++++++++++++++++++++++++++++++++++-- sound/usb/mixer_maps.c | 65 ++++++++++ sound/usb/stream.c | 83 +++++++++++-- sound/usb/usbaudio.h | 2 + 6 files changed, 466 insertions(+), 20 deletions(-)
--- a/sound/usb/mixer_maps.c +++ b/sound/usb/mixer_maps.c @@ -482,3 +482,68 @@ struct usbmix_ctl_map { { 0 } /* terminator */ };
+/*
- Control map entries for UAC3 BADD profiles
- */
+static struct usbmix_name_map uac3_badd_generic_io_map[] = {
{ UAC3_BADD_FU_ID2, "Generic Out Playback" },{ UAC3_BADD_FU_ID5, "Generic In Capture" },{ 0 } /* terminator */+}; +static struct usbmix_name_map uac3_badd_headphone_map[] = {
{ UAC3_BADD_FU_ID2, "Headphone Playback" },{ 0 } /* terminator */+}; +static struct usbmix_name_map uac3_badd_speaker_map[] = {
{ UAC3_BADD_FU_ID2, "Speaker Playback" },{ 0 } /* terminator */+}; +static struct usbmix_name_map uac3_badd_microphone_map[] = {
{ UAC3_BADD_FU_ID5, "Mic Capture" },{ 0 } /* terminator */+}; +/* Covers also 'headset adapter' profile */ +static struct usbmix_name_map uac3_badd_headset_map[] = {
{ UAC3_BADD_FU_ID2, "Headset Playback" },{ UAC3_BADD_FU_ID5, "Headset Capture" },{ UAC3_BADD_FU_ID7, "Side Tone Mixing" },
Can you please call this "Sidetone"? This better matches other Sidetone control names in the sound tree and makes it compatible with existing Android userspace usage.