ASoC: sirf-usp: Fixed a bug for playback and capture work at the same time

1. The startup function invoked when the playback and capture.
   If start playback when capturing, the registers are re-initinitialised.
   That cause the playback fail. So move the startup code into runtime resume.
2. Modified: If non RUNTIME_PM support, the probe need enable clock and
   initinitialise registers.
3. Refine code.

Signed-off-by: Rongjun Ying <rongjun.ying@csr.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/sirf/sirf-usp.c b/sound/soc/sirf/sirf-usp.c
index 9693bc2..3a73037 100644 (file)
--- a/sound/soc/sirf/sirf-usp.c
+++ b/sound/soc/sirf/sirf-usp.c
@@ -103,11 +103,8 @@ static int sirf_usp_pcm_set_dai_fmt(struct snd_soc_dai *dai,
        return 0;
 }
 
-static int sirf_usp_i2s_startup(struct snd_pcm_substream *substream,
-               struct snd_soc_dai *dai)
+static void sirf_usp_i2s_init(struct sirf_usp *usp)
 {
-       struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
-
        /* Configure RISC mode */
        regmap_update_bits(usp->regmap, USP_RISC_DSP_MODE,
                USP_RISC_DSP_SEL, ~USP_RISC_DSP_SEL);
@@ -119,19 +116,16 @@ static int sirf_usp_i2s_startup(struct snd_pcm_substream *substream,
        regmap_write(usp->regmap, USP_TX_DMA_IO_LEN, 0);
        regmap_write(usp->regmap, USP_RX_DMA_IO_LEN, 0);
 
-       regmap_write(usp->regmap, USP_RX_FRAME_CTRL, USP_SINGLE_SYNC_MODE);
-
-       regmap_write(usp->regmap, USP_TX_FRAME_CTRL, USP_TXC_SLAVE_CLK_SAMPLE);
-
        /* Configure Mode2 register */
        regmap_write(usp->regmap, USP_MODE2, (1 << USP_RXD_DELAY_LEN_OFFSET) |
-               (0 << USP_TXD_DELAY_LEN_OFFSET));
+               (0 << USP_TXD_DELAY_LEN_OFFSET) |
+               USP_TFS_CLK_SLAVE_MODE | USP_RFS_CLK_SLAVE_MODE);
 
        /* Configure Mode1 register */
        regmap_write(usp->regmap, USP_MODE1,
                USP_SYNC_MODE | USP_EN | USP_TXD_ACT_EDGE_FALLING |
                USP_RFS_ACT_LEVEL_LOGIC1 | USP_TFS_ACT_LEVEL_LOGIC1 |
-               USP_TX_UFLOW_REPEAT_ZERO);
+               USP_TX_UFLOW_REPEAT_ZERO | USP_CLOCK_MODE_SLAVE);
 
        /* Configure RX DMA IO Control register */
        regmap_write(usp->regmap, USP_RX_DMA_IO_CTRL, 0);
@@ -155,8 +149,6 @@ static int sirf_usp_i2s_startup(struct snd_pcm_substream *substream,
        /* Congiure TX FIFO Level Check register */
        regmap_write(usp->regmap, USP_TX_FIFO_LEVEL_CHK,
                TX_FIFO_SC(0x1B) | TX_FIFO_LC(0x0E) | TX_FIFO_HC(0x04));
-
-       return 0;
 }
 
 static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
@@ -204,23 +196,19 @@ static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                regmap_update_bits(usp->regmap, USP_TX_FRAME_CTRL,
                        USP_TXC_DATA_LEN_MASK | USP_TXC_FRAME_LEN_MASK
-                       | USP_TXC_SHIFTER_LEN_MASK,
+                       | USP_TXC_SHIFTER_LEN_MASK | USP_TXC_SLAVE_CLK_SAMPLE,
                        ((data_len - 1) << USP_TXC_DATA_LEN_OFFSET)
                        | ((frame_len - 1) << USP_TXC_FRAME_LEN_OFFSET)
-                       | ((shifter_len - 1) << USP_TXC_SHIFTER_LEN_OFFSET));
+                       | ((shifter_len - 1) << USP_TXC_SHIFTER_LEN_OFFSET)
+                       | USP_TXC_SLAVE_CLK_SAMPLE);
        else
                regmap_update_bits(usp->regmap, USP_RX_FRAME_CTRL,
                        USP_RXC_DATA_LEN_MASK | USP_RXC_FRAME_LEN_MASK
-                       | USP_RXC_SHIFTER_LEN_MASK,
+                       | USP_RXC_SHIFTER_LEN_MASK | USP_SINGLE_SYNC_MODE,
                        ((data_len - 1) << USP_RXC_DATA_LEN_OFFSET)
                        | ((frame_len - 1) << USP_RXC_FRAME_LEN_OFFSET)
-                       | ((shifter_len - 1) << USP_RXC_SHIFTER_LEN_OFFSET));
-
-       regmap_update_bits(usp->regmap, USP_MODE1,
-                       USP_CLOCK_MODE_SLAVE, USP_CLOCK_MODE_SLAVE);
-       regmap_update_bits(usp->regmap, USP_MODE2,
-                       USP_TFS_CLK_SLAVE_MODE | USP_RFS_CLK_SLAVE_MODE,
-                       USP_TFS_CLK_SLAVE_MODE | USP_RFS_CLK_SLAVE_MODE);
+                       | ((shifter_len - 1) << USP_RXC_SHIFTER_LEN_OFFSET)
+                       | USP_SINGLE_SYNC_MODE);
 
        return 0;
 }
@@ -253,7 +241,6 @@ static int sirf_usp_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
 }
 
 static const struct snd_soc_dai_ops sirf_usp_pcm_dai_ops = {
-       .startup = sirf_usp_i2s_startup,
        .trigger = sirf_usp_pcm_trigger,
        .set_fmt = sirf_usp_pcm_set_dai_fmt,
        .hw_params = sirf_usp_pcm_hw_params,
@@ -282,7 +269,6 @@ static struct snd_soc_dai_driver sirf_usp_pcm_dai = {
        .ops = &sirf_usp_pcm_dai_ops,
 };
 
-#ifdef CONFIG_PM
 static int sirf_usp_pcm_runtime_suspend(struct device *dev)
 {
        struct sirf_usp *usp = dev_get_drvdata(dev);
@@ -293,9 +279,15 @@ static int sirf_usp_pcm_runtime_suspend(struct device *dev)
 static int sirf_usp_pcm_runtime_resume(struct device *dev)
 {
        struct sirf_usp *usp = dev_get_drvdata(dev);
-       return clk_prepare_enable(usp->clk);
+       int ret;
+       ret = clk_prepare_enable(usp->clk);
+       if (ret) {
+               dev_err(dev, "clk_enable failed: %d\n", ret);
+               return ret;
+       }
+       sirf_usp_i2s_init(usp);
+       return 0;
 }
-#endif
 
 #ifdef CONFIG_PM_SLEEP
 static int sirf_usp_pcm_suspend(struct device *dev)
@@ -369,6 +361,11 @@ static int sirf_usp_pcm_probe(struct platform_device *pdev)
        }
 
        pm_runtime_enable(&pdev->dev);
+       if (!pm_runtime_enabled(&pdev->dev)) {
+               ret = sirf_usp_pcm_runtime_resume(&pdev->dev);
+               if (ret)
+                       return ret;
+       }
 
        ret = devm_snd_soc_register_component(&pdev->dev, &sirf_usp_component,
                &sirf_usp_pcm_dai, 1);
@@ -381,7 +378,10 @@ static int sirf_usp_pcm_probe(struct platform_device *pdev)
 
 static int sirf_usp_pcm_remove(struct platform_device *pdev)
 {
-       pm_runtime_disable(&pdev->dev);
+       if (!pm_runtime_enabled(&pdev->dev))
+               sirf_usp_pcm_runtime_suspend(&pdev->dev);
+       else
+               pm_runtime_disable(&pdev->dev);
        return 0;
 }