ASoC: amd: ps: use acp_lock to protect common registers in pdm driver

Retrieve acp_lock mutex as platform data and use it for protecting
ACP common registers access in acp pdm driver.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230104055435.321327-2-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index 4785428..e0160cb 100644 (file)
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -88,6 +88,7 @@ struct pdm_stream_instance {
 struct pdm_dev_data {
        u32 pdm_irq;
        void __iomem *acp63_base;
+       struct mutex *acp_lock;
        struct snd_pcm_substream *capture_stream;
 };
 

diff --git a/sound/soc/amd/ps/ps-pdm-dma.c b/sound/soc/amd/ps/ps-pdm-dma.c
index eea71a9..8957d8f 100644 (file)
--- a/sound/soc/amd/ps/ps-pdm-dma.c
+++ b/sound/soc/amd/ps/ps-pdm-dma.c
@@ -59,22 +59,26 @@ static void acp63_enable_pdm_clock(void __iomem *acp_base)
        acp63_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
 }
 
-static void acp63_enable_pdm_interrupts(void __iomem *acp_base)
+static void acp63_enable_pdm_interrupts(struct pdm_dev_data *adata)
 {
        u32 ext_int_ctrl;
 
-       ext_int_ctrl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+       mutex_lock(adata->acp_lock);
+       ext_int_ctrl = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
        ext_int_ctrl |= PDM_DMA_INTR_MASK;
-       acp63_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+       acp63_writel(ext_int_ctrl, adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
+       mutex_unlock(adata->acp_lock);
 }
 
-static void acp63_disable_pdm_interrupts(void __iomem *acp_base)
+static void acp63_disable_pdm_interrupts(struct pdm_dev_data *adata)
 {
        u32 ext_int_ctrl;
 
-       ext_int_ctrl = acp63_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
+       mutex_lock(adata->acp_lock);
+       ext_int_ctrl = acp63_readl(adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
        ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
-       acp63_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
+       acp63_writel(ext_int_ctrl, adata->acp63_base + ACP_EXTERNAL_INTR_CNTL);
+       mutex_unlock(adata->acp_lock);
 }
 
 static bool acp63_check_pdm_dma_status(void __iomem *acp_base)
@@ -196,7 +200,7 @@ static int acp63_pdm_dma_open(struct snd_soc_component *component,
                return ret;
        }
 
-       acp63_enable_pdm_interrupts(adata->acp63_base);
+       acp63_enable_pdm_interrupts(adata);
 
        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
                adata->capture_stream = substream;
@@ -272,7 +276,7 @@ static int acp63_pdm_dma_close(struct snd_soc_component *component,
        struct pdm_dev_data *adata = dev_get_drvdata(component->dev);
        struct snd_pcm_runtime *runtime = substream->runtime;
 
-       acp63_disable_pdm_interrupts(adata->acp63_base);
+       acp63_disable_pdm_interrupts(adata);
        adata->capture_stream = NULL;
        kfree(runtime->private_data);
        return 0;
@@ -353,6 +357,10 @@ static int acp63_pdm_audio_probe(struct platform_device *pdev)
        struct pdm_dev_data *adata;
        int status;
 
+       if (!pdev->dev.platform_data) {
+               dev_err(&pdev->dev, "platform_data not retrieved\n");
+               return -ENODEV;
+       }
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
@@ -368,7 +376,7 @@ static int acp63_pdm_audio_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        adata->capture_stream = NULL;
-
+       adata->acp_lock = pdev->dev.platform_data;
        dev_set_drvdata(&pdev->dev, adata);
        status = devm_snd_soc_register_component(&pdev->dev,
                                                 &acp63_pdm_component,
@@ -408,7 +416,7 @@ static int __maybe_unused acp63_pdm_resume(struct device *dev)
                acp63_init_pdm_ring_buffer(PDM_MEM_WINDOW_START, buffer_len,
                                           period_bytes, adata->acp63_base);
        }
-       acp63_enable_pdm_interrupts(adata->acp63_base);
+       acp63_enable_pdm_interrupts(adata);
        return 0;
 }
 
@@ -417,7 +425,7 @@ static int __maybe_unused acp63_pdm_suspend(struct device *dev)
        struct pdm_dev_data *adata;
 
        adata = dev_get_drvdata(dev);
-       acp63_disable_pdm_interrupts(adata->acp63_base);
+       acp63_disable_pdm_interrupts(adata);
        return 0;
 }
 
@@ -426,7 +434,7 @@ static int __maybe_unused acp63_pdm_runtime_resume(struct device *dev)
        struct pdm_dev_data *adata;
 
        adata = dev_get_drvdata(dev);
-       acp63_enable_pdm_interrupts(adata->acp63_base);
+       acp63_enable_pdm_interrupts(adata);
        return 0;
 }