diff mbox series

[V3,05/12] ASoC: amd: add ACP5x PCM platform driver

Message ID 20210719165140.16143-6-vijendar.mukunda@amd.com (mailing list archive)
State Superseded
Headers show
Series Add Vangogh ACP ASoC driver | expand

Commit Message

Mukunda,Vijendar July 19, 2021, 4:51 p.m. UTC 
PCM platform driver binds to the platform device created by
ACP5x PCI device. PCM driver registers ALSA DMA components
with ASoC framework.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
 sound/soc/amd/vangogh/acp5x-pcm-dma.c | 73 +++++++++++++++++++++++++++
 sound/soc/amd/vangogh/acp5x.h         |  4 ++
 2 files changed, 77 insertions(+)
 create mode 100644 sound/soc/amd/vangogh/acp5x-pcm-dma.c

Comments

Pierre-Louis Bossart July 19, 2021, 6:09 p.m. UTC | #1 
> +static int acp5x_audio_probe(struct platform_device *pdev)
> +{
> +	struct resource *res;
> +	struct i2s_dev_data *adata;
> +	int status;
> +
> +	if (!pdev->dev.platform_data) {
> +		dev_err(&pdev->dev, "platform_data not retrieved\n");
> +		return -ENODEV;
> +	}
> +	irqflags = *((unsigned int *)(pdev->dev.platform_data));
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res) {
> +		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
> +			return -ENODEV;
> +	}
> +
> +	adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
> +	if (!adata)
> +		return -ENOMEM;
> +
> +	adata->acp5x_base = devm_ioremap(&pdev->dev, res->start,
> +					 resource_size(res));
> +	if (!adata->acp5x_base)
> +		return -ENOMEM;
> +	dev_set_drvdata(&pdev->dev, adata);
> +	status = devm_snd_soc_register_component(&pdev->dev,
> +						 &acp5x_i2s_component,
> +						 NULL, 0);
> +	if (status) {
> +		dev_err(&pdev->dev, "Fail to register acp i2s component\n");
> +		return -ENODEV;

Unclear why you need to change the error code explicitly to -ENODEV?

return status?


> +	}
> +	return 0;
> +}
> +
Mukunda,Vijendar July 19, 2021, 7:05 p.m. UTC | #2 
On 7/19/21 11:39 PM, Pierre-Louis Bossart wrote:
> 
>> +static int acp5x_audio_probe(struct platform_device *pdev)
>> +{
>> +	struct resource *res;
>> +	struct i2s_dev_data *adata;
>> +	int status;
>> +
>> +	if (!pdev->dev.platform_data) {
>> +		dev_err(&pdev->dev, "platform_data not retrieved\n");
>> +		return -ENODEV;
>> +	}
>> +	irqflags = *((unsigned int *)(pdev->dev.platform_data));
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	if (!res) {
>> +		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
>> +			return -ENODEV;
>> +	}
>> +
>> +	adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
>> +	if (!adata)
>> +		return -ENOMEM;
>> +
>> +	adata->acp5x_base = devm_ioremap(&pdev->dev, res->start,
>> +					 resource_size(res));
>> +	if (!adata->acp5x_base)
>> +		return -ENOMEM;
>> +	dev_set_drvdata(&pdev->dev, adata);
>> +	status = devm_snd_soc_register_component(&pdev->dev,
>> +						 &acp5x_i2s_component,
>> +						 NULL, 0);
>> +	if (status) {
>> +		dev_err(&pdev->dev, "Fail to register acp i2s component\n");
>> +		return -ENODEV;
> 
> Unclear why you need to change the error code explicitly to -ENODEV?
> 
> return status?

yes, we can return status rather than forcing error as -ENODEV.
Will fix it and post the new version.
> 
> 
>> +	}
>> +	return 0;
>> +}
>> +
diff mbox series

Patch

diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
new file mode 100644
index 000000000000..2ff11bb88305
--- /dev/null
+++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
@@ -0,0 +1,73 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD ALSA SoC PCM Driver
+//
+// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "acp5x.h"
+
+#define DRV_NAME "acp5x_i2s_dma"
+
+static const struct snd_soc_component_driver acp5x_i2s_component = {
+	.name		= DRV_NAME,
+};
+
+static int acp5x_audio_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct i2s_dev_data *adata;
+	int status;
+
+	if (!pdev->dev.platform_data) {
+		dev_err(&pdev->dev, "platform_data not retrieved\n");
+		return -ENODEV;
+	}
+	irqflags = *((unsigned int *)(pdev->dev.platform_data));
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+			return -ENODEV;
+	}
+
+	adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
+	if (!adata)
+		return -ENOMEM;
+
+	adata->acp5x_base = devm_ioremap(&pdev->dev, res->start,
+					 resource_size(res));
+	if (!adata->acp5x_base)
+		return -ENOMEM;
+	dev_set_drvdata(&pdev->dev, adata);
+	status = devm_snd_soc_register_component(&pdev->dev,
+						 &acp5x_i2s_component,
+						 NULL, 0);
+	if (status) {
+		dev_err(&pdev->dev, "Fail to register acp i2s component\n");
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static struct platform_driver acp5x_dma_driver = {
+	.probe = acp5x_audio_probe,
+	.driver = {
+		.name = "acp5x_i2s_dma",
+	},
+};
+
+module_platform_driver(acp5x_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP 5.x PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h
index bbf29fd2b12f..d2853738eb17 100644
--- a/sound/soc/amd/vangogh/acp5x.h
+++ b/sound/soc/amd/vangogh/acp5x.h
@@ -32,6 +32,10 @@ 
 #define I2S_MODE 0x00
 #define ACP5x_I2S_MODE 0x00
 
+struct i2s_dev_data {
+	void __iomem *acp5x_base;
+};
+
 /* common header file uses exact offset rather than relative
  * offset which requires substraction logic from base_addr
  * for accessing ACP5x MMIO space registers