[alsa-devel] [PATCH 04/13] ASoC: dwc: add quirk for different register offset

[Alex Deucher]

From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>

DWC in ACP 2.x IP has different offsets for I2S_COMP_PARAM_* registers.
Added a quirk to support the same.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 include/sound/designware_i2s.h |  5 +++++
 sound/soc/dwc/designware_i2s.c | 17 ++++++++++++++---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/include/sound/designware_i2s.h b/include/sound/designware_i2s.h
index 8966ba7..e0bb458 100644
--- a/include/sound/designware_i2s.h
+++ b/include/sound/designware_i2s.h
@@ -45,6 +45,11 @@ struct i2s_platform_data {
 	u32 snd_fmts;
 	u32 snd_rates;
 
+	#define DW_I2S_QUIRK_COMP_REG_OFFSET	(1 << 0)
+	unsigned int quirks;
+	unsigned int i2s_reg_comp1;
+	unsigned int i2s_reg_comp2;
+
 	void *play_dma_data;
 	void *capture_dma_data;
 	bool (*filter)(struct dma_chan *chan, void *slave);
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index 3d7754c..940c881 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -94,6 +94,9 @@ struct dw_i2s_dev {
 	struct clk *clk;
 	int active;
 	unsigned int capability;
+	unsigned int quirks;
+	unsigned int i2s_reg_comp1;
+	unsigned int i2s_reg_comp2;
 	struct device *dev;
 
 	/* data related to DMA transfers b/w i2s and DMAC */
@@ -477,8 +480,8 @@ static int dw_configure_dai(struct dw_i2s_dev *dev,
 	 * Read component parameter registers to extract
 	 * the I2S block's configuration.
 	 */
-	u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
-	u32 comp2 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_2);
+	u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
+	u32 comp2 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp2);
 	u32 idx;
 
 	if (COMP1_TX_ENABLED(comp1)) {
@@ -521,7 +524,7 @@ static int dw_configure_dai_by_pd(struct dw_i2s_dev *dev,
 				   struct resource *res,
 				   const struct i2s_platform_data *pdata)
 {
-	u32 comp1 = i2s_read_reg(dev->i2s_base, I2S_COMP_PARAM_1);
+	u32 comp1 = i2s_read_reg(dev->i2s_base, dev->i2s_reg_comp1);
 	u32 idx = COMP1_APB_DATA_WIDTH(comp1);
 	int ret;
 
@@ -625,6 +628,14 @@ static int dw_i2s_probe(struct platform_device *pdev)
 	if (pdata) {
 		dev->capability = pdata->cap;
 		clk_id = NULL;
+		dev->quirks = pdata->quirks;
+		if (dev->quirks & DW_I2S_QUIRK_COMP_REG_OFFSET) {
+			dev->i2s_reg_comp1 = pdata->i2s_reg_comp1;
+			dev->i2s_reg_comp2 = pdata->i2s_reg_comp2;
+		} else {
+			dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
+			dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
+		}
 		ret = dw_configure_dai_by_pd(dev, dw_i2s_dai, res, pdata);
 	} else {
 		clk_id = "i2sclk";
-- 
1.8.3.1