From: Tony Lindgren <tony@xxxxxxxxxxx>
We can have multiple connections on a single McBSP instance configured
with audio graph card when using TDM (Time Division Multiplexing). Let's
allow that by configuring dais dynamically.
See Documentation/devicetree/bindings/sound/audio-graph-card.txt and
Documentation/devicetree/bindings/graph.txt for more details for
multiple endpoints.
I've tested this with droid4 where cpcap pmic and modem voice are both>
both wired to mcbsp3. I've also tested this on droid4 both with and
without the pending modem audio codec driver that is waiting for n_gsm
serdev dependencies to clear.
Cc: Aaro Koskinen <aaro.koskinen@xxxxxx>
Cc: Arthur D. <spinal.by@xxxxxxxxx>
Cc: Jarkko Nikula <jarkko.nikula@xxxxxxxxxx>
Cc: Merlijn Wajer <merlijn@xxxxxxxxxx>
Cc: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Cc: Sebastian Reichel <sre@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Pavel Machek <pavel@xxxxxx>
---
sound/soc/ti/omap-mcbsp-priv.h | 2 ++
sound/soc/ti/omap-mcbsp.c | 76 +++++++++++++++++++++++++++++-------------
2 files changed, 55 insertions(+), 23 deletions(-)
diff --git a/sound/soc/ti/omap-mcbsp-priv.h b/sound/soc/ti/omap-mcbsp-priv.h
index 7865cda4bf0a..9464f5d35822 100644
--- a/sound/soc/ti/omap-mcbsp-priv.h
+++ b/sound/soc/ti/omap-mcbsp-priv.h
@@ -262,6 +262,8 @@ struct omap_mcbsp {
struct omap_mcbsp_platform_data *pdata;
struct omap_mcbsp_st_data *st_data;
struct omap_mcbsp_reg_cfg cfg_regs;
+ struct snd_soc_dai_driver *dais;
+ int dai_count;
struct snd_dmaengine_dai_dma_data dma_data[2];
unsigned int dma_req[2];
int dma_op_mode;
diff --git a/sound/soc/ti/omap-mcbsp.c b/sound/soc/ti/omap-mcbsp.c
index 6025b30bbe77..189a6461b671 100644
--- a/sound/soc/ti/omap-mcbsp.c
+++ b/sound/soc/ti/omap-mcbsp.c
@@ -14,6 +14,7 @@
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/of_graph.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -1299,23 +1300,53 @@ static int omap_mcbsp_remove(struct snd_soc_dai *dai)
return 0;
}
-static struct snd_soc_dai_driver omap_mcbsp_dai = {
- .probe = omap_mcbsp_probe,
- .remove = omap_mcbsp_remove,
- .playback = {
- .channels_min = 1,
- .channels_max = 16,
- .rates = OMAP_MCBSP_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 16,
- .rates = OMAP_MCBSP_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
- },
- .ops = &mcbsp_dai_ops,
-};
+static int omap_mcbsp_init_dais(struct omap_mcbsp *mcbsp)
+{
+ struct device_node *np = mcbsp->dev->of_node;
+ int i;
+
+ if (np)
+ mcbsp->dai_count = of_graph_get_endpoint_count(np);
+
+ if (!mcbsp->dai_count)
+ mcbsp->dai_count = 1;
+
+ mcbsp->dais = devm_kcalloc(mcbsp->dev, mcbsp->dai_count,
+ sizeof(*mcbsp->dais), GFP_KERNEL);
+ if (!mcbsp->dais)
+ return -ENOMEM;
+
+ for (i = 0; i < mcbsp->dai_count; i++) {
+ struct snd_soc_dai_driver *dai = &mcbsp->dais[i];
+
+ dai->name = devm_kasprintf(mcbsp->dev, GFP_KERNEL, "%s-dai%i",
+ dev_name(mcbsp->dev), i);
+
+ if (i == 0) {
+ dai->probe = omap_mcbsp_probe;
+ dai->remove = omap_mcbsp_remove;
+ dai->ops = &mcbsp_dai_ops;
+ }
+ dai->playback.channels_min = 1;
+ dai->playback.channels_max = 16;
+ dai->playback.rates = OMAP_MCBSP_RATES;
+ if (mcbsp->pdata->reg_size == 2)
+ dai->playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ else
+ dai->playback.formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE;
+ dai->capture.channels_min = 1;
+ dai->capture.channels_max = 16;
+ dai->capture.rates = OMAP_MCBSP_RATES;
+ if (mcbsp->pdata->reg_size == 2)
+ dai->capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ else
+ dai->capture.formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE;
+ }
+
+ return 0;
+}
static const struct snd_soc_component_driver omap_mcbsp_component = {
.name = "omap-mcbsp",
@@ -1404,18 +1435,17 @@ static int asoc_mcbsp_probe(struct platform_device *pdev)
mcbsp->dev = &pdev->dev;
platform_set_drvdata(pdev, mcbsp);
- ret = omap_mcbsp_init(pdev);
+ ret = omap_mcbsp_init_dais(mcbsp);
if (ret)
return ret;
- if (mcbsp->pdata->reg_size == 2) {
- omap_mcbsp_dai.playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
- omap_mcbsp_dai.capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
- }
+ ret = omap_mcbsp_init(pdev);
+ if (ret)
+ return ret;
ret = devm_snd_soc_register_component(&pdev->dev,
&omap_mcbsp_component,
- &omap_mcbsp_dai, 1);
+ mcbsp->dais, mcbsp->dai_count);
if (ret)
return ret;