#include <linux/platform_device.h>
#include <linux/module.h>
+#include <linux/bitfield.h>
#include <linux/err.h>
#include <linux/io.h>
#include <sound/pcm_params.h>
#define DRV_NAME "acp_yc_pdm_dma"
+static int pdm_gain = 3;
+module_param(pdm_gain, int, 0644);
+MODULE_PARM_DESC(pdm_gain, "Gain control (0-3)");
+
static const struct snd_pcm_hardware acp6x_pdm_hardware_capture = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
acp6x_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
pdm_ctrl = acp6x_readl(acp_base + ACP_WOV_MISC_CTRL);
- pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
+ pdm_ctrl &= ~ACP_WOV_GAIN_CONTROL;
+ pdm_ctrl |= FIELD_PREP(ACP_WOV_GAIN_CONTROL, clamp(pdm_gain, 0, 3));
acp6x_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
}
#define ACP_ERROR_STAT 29
#define PDM_DECIMATION_FACTOR 2
#define ACP_PDM_CLK_FREQ_MASK 7
-#define ACP_WOV_MISC_CTRL_MASK 0x18
+#define ACP_WOV_GAIN_CONTROL GENMASK(4, 3)
#define ACP_PDM_ENABLE 1
#define ACP_PDM_DISABLE 0
#define ACP_PDM_DMA_EN_STATUS 2