On 8/12/22 19:50, Amadeusz Sławiński wrote:
[CAUTION: External Email]
On 8/12/2022 2:07 PM, Syed Saba kareem wrote:
This patch adds PDM driver DMA operations for Pink Sardine Platform.
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>
---
sound/soc/amd/ps/acp62.h | 41 +++++
sound/soc/amd/ps/ps-pdm-dma.c | 310 ++++++++++++++++++++++++++++++++++
2 files changed, 351 insertions(+)
diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
index 563252834b09..525e8bd225a2 100644
--- a/sound/soc/amd/ps/acp62.h
+++ b/sound/soc/amd/ps/acp62.h
@@ -27,6 +27,31 @@
#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
#define PDM_DMA_STAT 0x10
+#define PDM_DMA_INTR_MASK 0x10000
+#define ACP_ERROR_STAT 29
+#define PDM_DECIMATION_FACTOR 2
+#define ACP_PDM_CLK_FREQ_MASK 7
+#define ACP_WOV_MISC_CTRL_MASK 0x10
+#define ACP_PDM_ENABLE 1
+#define ACP_PDM_DISABLE 0
+#define ACP_PDM_DMA_EN_STATUS 2
+#define TWO_CH 2
+#define DELAY_US 5
+#define ACP_COUNTER 20000
+
+#define ACP_SRAM_PTE_OFFSET 0x03800000
+#define PAGE_SIZE_4K_ENABLE 2
+#define PDM_PTE_OFFSET 0
+#define PDM_MEM_WINDOW_START 0x4000000
+
+#define CAPTURE_MIN_NUM_PERIODS 4
+#define CAPTURE_MAX_NUM_PERIODS 4
+#define CAPTURE_MAX_PERIOD_SIZE 8192
+#define CAPTURE_MIN_PERIOD_SIZE 4096
+
+#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
+#define MIN_BUFFER MAX_BUFFER
+
enum acp_config {
ACP_CONFIG_0 = 0,
ACP_CONFIG_1,
@@ -46,6 +71,22 @@ enum acp_config {
ACP_CONFIG_15,
};
+struct pdm_stream_instance {
+ u16 num_pages;
+ u16 channels;
+ dma_addr_t dma_addr;
+ u64 bytescount;
+ void __iomem *acp62_base;
+};
+
+union acp_pdm_dma_count {
+ struct {
+ u32 low;
+ u32 high;
+ } bcount;
Fix indentation.
Also you can remove struct name, and access fields directly, so instead
of accessing somevariable.bcount.low, you would use somevariable.low, it
would probably be more readable.
Okay Will fix it.
+ u64 bytescount;
+};
+
struct pdm_dev_data {
u32 pdm_irq;
void __iomem *acp62_base;
diff --git a/sound/soc/amd/ps/ps-pdm-dma.c
b/sound/soc/amd/ps/ps-pdm-dma.c
index bca2ac3e81f5..a98a2015015d 100644
...
+
+static int acp62_pdm_dma_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ struct pdm_dev_data *adata;
+ struct pdm_stream_instance *pdm_data;
+ int ret;
+
+ runtime = substream->runtime;
+ adata = dev_get_drvdata(component->dev);
+ pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL);
+ if (!pdm_data)
+ return -EINVAL;
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ runtime->hw = acp62_pdm_hardware_capture;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(component->dev, "set integer constraint
failed\n");
+ kfree(pdm_data);
+ return ret;
+ }
+
+ acp62_enable_pdm_interrupts(adata->acp62_base);
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ adata->capture_stream = substream;
+
+ pdm_data->acp62_base = adata->acp62_base;
+ runtime->private_data = pdm_data;
Should probably kfree(runtime->private_data) in acp62_pdm_dma_close(),
otherwise won't there be a memory leak?
Will fix it.
+ return ret;
+}
+
...
