Add a string property to assign the rpmsg channel this sound card sits on. This property can be omitted if there is only one sound card and it sits on "rpmsg-audio-channel".

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- .../devicetree/bindings/sound/fsl,rpmsg.yaml | 36 +++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml index d370c98a62c7..e847611a85f7 100644 --- a/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml +++ b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml @@ -11,8 +11,11 @@ maintainers:

description: | fsl_rpmsg is a virtual audio device. Mapping to real hardware devices - are SAI, DMA controlled by Cortex M core. What we see from Linux - side is a device which provides audio service by rpmsg channel. + are SAI, MICFIL, DMA controlled by Cortex M core. What we see from + Linux side is a device which provides audio service by rpmsg channel. + We can create different sound cards which access different hardwares + such as SAI, MICFIL, .etc through building rpmsg channels between + Cortex-A and Cortex-M.

properties: compatible: @@ -85,6 +88,16 @@ properties: This is a boolean property. If present, the receiving function will be enabled.

+ fsl,rpmsg-channel-name: + $ref: /schemas/types.yaml#/definitions/string + description: | + A string property to assign rpmsg channel this sound card sits on. + This property can be omitted if there is only one sound card and it sits + on "rpmsg-audio-channel". + enum: + - rpmsg-audio-channel + - rpmsg-micfil-channel + required: - compatible - model @@ -107,3 +120,22 @@ examples: <&clk IMX8MN_AUDIO_PLL2_OUT>; clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k"; }; + + - | + #include <dt-bindings/clock/imx8mm-clock.h> + + rpmsg_micfil: audio-controller { + compatible = "fsl,imx8mm-rpmsg-audio"; + model = "micfil-audio"; + fsl,rpmsg-channel-name = "rpmsg-micfil-channel"; + fsl,enable-lpa; + fsl,rpmsg-in; + clocks = <&clk IMX8MM_CLK_PDM_IPG>, + <&clk IMX8MM_CLK_PDM_ROOT>, + <&clk IMX8MM_CLK_SDMA3_ROOT>, + <&clk IMX8MM_AUDIO_PLL1_OUT>, + <&clk IMX8MM_AUDIO_PLL2_OUT>; + clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k"; + }; + +...

Rpmsg channel for MICFIL can also be created through rpmsg name service announcement. If this driver is probed, Cortex-A can access MICFIL which is actually controlled by Cortex-M through rpmsg channel for MICFIL. This driver also helps register ASoC platform device thus use of PLATFORM_DEVID_AUTO macro in API can automatically create device for each rpmsg channel.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/imx-audio-rpmsg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/imx-audio-rpmsg.c b/sound/soc/fsl/imx-audio-rpmsg.c index 905c3a071300..d5234ac4b09b 100644 --- a/sound/soc/fsl/imx-audio-rpmsg.c +++ b/sound/soc/fsl/imx-audio-rpmsg.c @@ -88,7 +88,7 @@ static int imx_audio_rpmsg_probe(struct rpmsg_device *rpdev) /* Register platform driver for rpmsg routine */ data->rpmsg_pdev = platform_device_register_data(&rpdev->dev, IMX_PCM_DRV_NAME, - PLATFORM_DEVID_NONE, + PLATFORM_DEVID_AUTO, NULL, 0); if (IS_ERR(data->rpmsg_pdev)) { dev_err(&rpdev->dev, "failed to register rpmsg platform.\n"); @@ -110,6 +110,7 @@ static void imx_audio_rpmsg_remove(struct rpmsg_device *rpdev)

static struct rpmsg_device_id imx_audio_rpmsg_id_table[] = { { .name = "rpmsg-audio-channel" }, + { .name = "rpmsg-micfil-channel" }, { }, };

This patch can register different ASoC platform drivers if there are several rpmsg channels. Thus sound cards based on different rpmsg channels can link to their respective platform drivers. Besides, the name of driver is equal to the name of rpmsg channel.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/imx-pcm-rpmsg.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/fsl/imx-pcm-rpmsg.c b/sound/soc/fsl/imx-pcm-rpmsg.c index 35049043e532..3157cd5a837e 100644 --- a/sound/soc/fsl/imx-pcm-rpmsg.c +++ b/sound/soc/fsl/imx-pcm-rpmsg.c @@ -684,7 +684,7 @@ static int imx_rpmsg_pcm_probe(struct platform_device *pdev) info->rpdev = container_of(pdev->dev.parent, struct rpmsg_device, dev); info->dev = &pdev->dev; /* Setup work queue */ - info->rpmsg_wq = alloc_ordered_workqueue("rpmsg_audio", + info->rpmsg_wq = alloc_ordered_workqueue(info->rpdev->id.name, WQ_HIGHPRI | WQ_UNBOUND | WQ_FREEZABLE); @@ -723,11 +723,15 @@ static int imx_rpmsg_pcm_probe(struct platform_device *pdev) if (ret) goto fail;

- component = snd_soc_lookup_component(&pdev->dev, IMX_PCM_DRV_NAME); + component = snd_soc_lookup_component(&pdev->dev, NULL); if (!component) { ret = -EINVAL; goto fail; } + + /* platform component name is used by machine driver to link with */ + component->name = info->rpdev->id.name; + #ifdef CONFIG_DEBUG_FS component->debugfs_prefix = "rpmsg"; #endif

Some sound card based on rpmsg may support multi-channel. The number of channels can be sent to Cortex-M in rpmsg for process.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/imx-pcm-rpmsg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/fsl/imx-pcm-rpmsg.c b/sound/soc/fsl/imx-pcm-rpmsg.c index 3157cd5a837e..2f310994f7ee 100644 --- a/sound/soc/fsl/imx-pcm-rpmsg.c +++ b/sound/soc/fsl/imx-pcm-rpmsg.c @@ -178,7 +178,7 @@ static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component, msg->s_msg.param.channels = RPMSG_CH_STEREO; break; default: - ret = -EINVAL; + msg->s_msg.param.channels = params_channels(params); break; }

This driver helps register ASoC machine device thus use of PLATFORM_DEVID_AUTO macro in API can automatically create device for each sound card based on rpmsg.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/fsl_rpmsg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_rpmsg.c b/sound/soc/fsl/fsl_rpmsg.c index bf94838bdbef..fde3d5006ce0 100644 --- a/sound/soc/fsl/fsl_rpmsg.c +++ b/sound/soc/fsl/fsl_rpmsg.c @@ -235,7 +235,7 @@ static int fsl_rpmsg_probe(struct platform_device *pdev)

rpmsg->card_pdev = platform_device_register_data(&pdev->dev, "imx-audio-rpmsg", - PLATFORM_DEVID_NONE, + PLATFORM_DEVID_AUTO, NULL, 0); if (IS_ERR(rpmsg->card_pdev)) {

Some sound card based on rpmsg may support multi-channel. This patch expands the maximum channels to 32.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/fsl_rpmsg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/fsl/fsl_rpmsg.c b/sound/soc/fsl/fsl_rpmsg.c index fde3d5006ce0..46c7868a2653 100644 --- a/sound/soc/fsl/fsl_rpmsg.c +++ b/sound/soc/fsl/fsl_rpmsg.c @@ -117,14 +117,14 @@ static struct snd_soc_dai_driver fsl_rpmsg_dai = { .playback = { .stream_name = "CPU-Playback", .channels_min = 2, - .channels_max = 2, + .channels_max = 32, .rates = SNDRV_PCM_RATE_KNOT, .formats = FSL_RPMSG_FORMATS, }, .capture = { .stream_name = "CPU-Capture", .channels_min = 2, - .channels_max = 2, + .channels_max = 32, .rates = SNDRV_PCM_RATE_KNOT, .formats = FSL_RPMSG_FORMATS, },

Each ASoC platform driver is named by rpmsg channel. ASoC machine driver can parse "fsl,rpmsg-channel-name" property to figure out which ASoC platform driver it should link with.

Signed-off-by: Chancel Liu chancel.liu@nxp.com --- sound/soc/fsl/imx-rpmsg.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/imx-rpmsg.c b/sound/soc/fsl/imx-rpmsg.c index 2e117311e582..57684064c9da 100644 --- a/sound/soc/fsl/imx-rpmsg.c +++ b/sound/soc/fsl/imx-rpmsg.c @@ -36,6 +36,7 @@ static int imx_rpmsg_probe(struct platform_device *pdev) struct platform_device *rpmsg_pdev = to_platform_device(dev); struct device_node *np = rpmsg_pdev->dev.of_node; struct of_phandle_args args; + const char *platform_name; struct imx_rpmsg *data; int ret = 0;

@@ -81,7 +82,10 @@ static int imx_rpmsg_probe(struct platform_device *pdev) }

data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev); - data->dai.platforms->name = IMX_PCM_DRV_NAME; + if (!of_property_read_string(np, "fsl,rpmsg-channel-name", &platform_name)) + data->dai.platforms->name = platform_name; + else + data->dai.platforms->name = "rpmsg-audio-channel"; data->dai.playback_only = true; data->dai.capture_only = true; data->card.num_links = 1;