The Q6USB backend can carry information about the available USB SND cards
and PCM devices discovered on the USB bus. The dev_token field is used by
the audio DSP to notify the USB offload driver of which card and PCM index
to enable playback on. Separate this into a dedicated API, so the USB
backend can set the dev_token accordingly. The audio DSP does not utilize
this information until the AFE port start command is sent, which is done
during the PCM prepare phase.
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
sound/soc/qcom/qdsp6/q6afe.c | 49 +++++++++++++++++++++++++-----------
sound/soc/qcom/qdsp6/q6afe.h | 1 +
2 files changed, 36 insertions(+), 14 deletions(-)
@@ -1394,10 +1394,42 @@ void q6afe_tdm_port_prepare(struct q6afe_port *port,
}
EXPORT_SYMBOL_GPL(q6afe_tdm_port_prepare);
-static int afe_port_send_usb_dev_param(struct q6afe_port *port, struct q6afe_usb_cfg *cfg)
+/**
+ * afe_port_send_usb_dev_param() - Send USB dev token
+ *
+ * @port: Instance of afe port
+ * @cardidx: USB SND card index to reference
+ * @pcmidx: USB SND PCM device index to reference
+ *
+ * The USB dev token carries information about which USB SND card instance and
+ * PCM device to execute the offload on. This information is carried through
+ * to the stream enable QMI request, which is handled by the offload class
+ * driver. The information is parsed to determine which USB device to query
+ * the required resources for.
+ */
+int afe_port_send_usb_dev_param(struct q6afe_port *port, int cardidx, int pcmidx)
{
- union afe_port_config *pcfg = &port->port_cfg;
struct afe_param_id_usb_audio_dev_params usb_dev;
+ int ret;
+
+ memset(&usb_dev, 0, sizeof(usb_dev));
+
+ usb_dev.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG;
+ usb_dev.dev_token = (cardidx << 16) | (pcmidx << 8);
+ ret = q6afe_port_set_param_v2(port, &usb_dev,
+ AFE_PARAM_ID_USB_AUDIO_DEV_PARAMS,
+ AFE_MODULE_AUDIO_DEV_INTERFACE, sizeof(usb_dev));
+ if (ret)
+ dev_err(port->afe->dev, "%s: AFE device param cmd failed %d\n",
+ __func__, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(afe_port_send_usb_dev_param);
+
+static int afe_port_send_usb_params(struct q6afe_port *port, struct q6afe_usb_cfg *cfg)
+{
+ union afe_port_config *pcfg = &port->port_cfg;
struct afe_param_id_usb_audio_dev_lpcm_fmt lpcm_fmt;
struct afe_param_id_usb_audio_svc_interval svc_int;
int ret = 0;
@@ -1408,20 +1440,9 @@ static int afe_port_send_usb_dev_param(struct q6afe_port *port, struct q6afe_usb
goto exit;
}
- memset(&usb_dev, 0, sizeof(usb_dev));
memset(&lpcm_fmt, 0, sizeof(lpcm_fmt));
memset(&svc_int, 0, sizeof(svc_int));
- usb_dev.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG;
- q6afe_port_set_param_v2(port, &usb_dev,
- AFE_PARAM_ID_USB_AUDIO_DEV_PARAMS,
- AFE_MODULE_AUDIO_DEV_INTERFACE, sizeof(usb_dev));
- if (ret) {
- dev_err(port->afe->dev, "%s: AFE device param cmd failed %d\n",
- __func__, ret);
- goto exit;
- }
-
lpcm_fmt.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG;
lpcm_fmt.endian = pcfg->usb_cfg.endian;
ret = q6afe_port_set_param_v2(port, &lpcm_fmt,
@@ -1465,7 +1486,7 @@ void q6afe_usb_port_prepare(struct q6afe_port *port,
pcfg->usb_cfg.num_channels = cfg->num_channels;
pcfg->usb_cfg.bit_width = cfg->bit_width;
- afe_port_send_usb_dev_param(port, cfg);
+ afe_port_send_usb_params(port, cfg);
}
EXPORT_SYMBOL_GPL(q6afe_usb_port_prepare);
@@ -274,6 +274,7 @@ void q6afe_tdm_port_prepare(struct q6afe_port *port, struct q6afe_tdm_cfg *cfg);
void q6afe_cdc_dma_port_prepare(struct q6afe_port *port,
struct q6afe_cdc_dma_cfg *cfg);
+int afe_port_send_usb_dev_param(struct q6afe_port *port, int cardidx, int pcmidx);
int q6afe_port_set_sysclk(struct q6afe_port *port, int clk_id,
int clk_src, int clk_root,
unsigned int freq, int dir);