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Diffstat (limited to 'sound/soc/img/img-i2s-out.c')
-rw-r--r--sound/soc/img/img-i2s-out.c120
1 files changed, 91 insertions, 29 deletions
diff --git a/sound/soc/img/img-i2s-out.c b/sound/soc/img/img-i2s-out.c
index 78b7f6cd675b..30a95bcef2db 100644
--- a/sound/soc/img/img-i2s-out.c
+++ b/sound/soc/img/img-i2s-out.c
@@ -63,29 +63,36 @@ struct img_i2s_out {
unsigned int active_channels;
struct reset_control *rst;
struct snd_soc_dai_driver dai_driver;
+ u32 suspend_ctl;
+ u32 *suspend_ch_ctl;
};
-static int img_i2s_out_suspend(struct device *dev)
+static int img_i2s_out_runtime_suspend(struct device *dev)
{
struct img_i2s_out *i2s = dev_get_drvdata(dev);
- if (!i2s->force_clk_active)
- clk_disable_unprepare(i2s->clk_ref);
+ clk_disable_unprepare(i2s->clk_ref);
+ clk_disable_unprepare(i2s->clk_sys);
return 0;
}
-static int img_i2s_out_resume(struct device *dev)
+static int img_i2s_out_runtime_resume(struct device *dev)
{
struct img_i2s_out *i2s = dev_get_drvdata(dev);
int ret;
- if (!i2s->force_clk_active) {
- ret = clk_prepare_enable(i2s->clk_ref);
- if (ret) {
- dev_err(dev, "clk_enable failed: %d\n", ret);
- return ret;
- }
+ ret = clk_prepare_enable(i2s->clk_sys);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(i2s->clk_ref);
+ if (ret) {
+ dev_err(dev, "clk_enable failed: %d\n", ret);
+ clk_disable_unprepare(i2s->clk_sys);
+ return ret;
}
return 0;
@@ -287,7 +294,7 @@ static int img_i2s_out_hw_params(struct snd_pcm_substream *substream,
static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
- int i;
+ int i, ret;
bool force_clk_active;
u32 chan_control_mask, control_mask, chan_control_set = 0;
u32 reg, control_set = 0;
@@ -342,6 +349,10 @@ static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
chan_control_mask = IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
+ ret = pm_runtime_get_sync(i2s->dev);
+ if (ret < 0)
+ return ret;
+
img_i2s_out_disable(i2s);
reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
@@ -361,6 +372,7 @@ static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
img_i2s_out_ch_enable(i2s, i);
img_i2s_out_enable(i2s);
+ pm_runtime_put(i2s->dev);
i2s->force_clk_active = force_clk_active;
@@ -467,9 +479,20 @@ static int img_i2s_out_probe(struct platform_device *pdev)
return PTR_ERR(i2s->clk_ref);
}
- ret = clk_prepare_enable(i2s->clk_sys);
- if (ret)
- return ret;
+ i2s->suspend_ch_ctl = devm_kzalloc(dev,
+ sizeof(*i2s->suspend_ch_ctl) * i2s->max_i2s_chan, GFP_KERNEL);
+ if (!i2s->suspend_ch_ctl)
+ return -ENOMEM;
+
+ pm_runtime_enable(&pdev->dev);
+ if (!pm_runtime_enabled(&pdev->dev)) {
+ ret = img_i2s_out_runtime_resume(&pdev->dev);
+ if (ret)
+ goto err_pm_disable;
+ }
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ goto err_suspend;
reg = IMG_I2S_OUT_CTL_FRM_SIZE_MASK;
img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
@@ -483,13 +506,7 @@ static int img_i2s_out_probe(struct platform_device *pdev)
img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
img_i2s_out_reset(i2s);
-
- pm_runtime_enable(&pdev->dev);
- if (!pm_runtime_enabled(&pdev->dev)) {
- ret = img_i2s_out_resume(&pdev->dev);
- if (ret)
- goto err_pm_disable;
- }
+ pm_runtime_put(&pdev->dev);
i2s->active_channels = 1;
i2s->dma_data.addr = res->start + IMG_I2S_OUT_TX_FIFO;
@@ -517,26 +534,70 @@ static int img_i2s_out_probe(struct platform_device *pdev)
err_suspend:
if (!pm_runtime_status_suspended(&pdev->dev))
- img_i2s_out_suspend(&pdev->dev);
+ img_i2s_out_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
- clk_disable_unprepare(i2s->clk_sys);
return ret;
}
static int img_i2s_out_dev_remove(struct platform_device *pdev)
{
- struct img_i2s_out *i2s = platform_get_drvdata(pdev);
-
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
- img_i2s_out_suspend(&pdev->dev);
+ img_i2s_out_runtime_suspend(&pdev->dev);
- clk_disable_unprepare(i2s->clk_sys);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int img_i2s_out_suspend(struct device *dev)
+{
+ struct img_i2s_out *i2s = dev_get_drvdata(dev);
+ int i, ret;
+ u32 reg;
+
+ if (pm_runtime_status_suspended(dev)) {
+ ret = img_i2s_out_runtime_resume(dev);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < i2s->max_i2s_chan; i++) {
+ reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL);
+ i2s->suspend_ch_ctl[i] = reg;
+ }
+
+ i2s->suspend_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
+
+ img_i2s_out_runtime_suspend(dev);
+
+ return 0;
+}
+
+static int img_i2s_out_resume(struct device *dev)
+{
+ struct img_i2s_out *i2s = dev_get_drvdata(dev);
+ int i, ret;
+ u32 reg;
+
+ ret = img_i2s_out_runtime_resume(dev);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < i2s->max_i2s_chan; i++) {
+ reg = i2s->suspend_ch_ctl[i];
+ img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
+ }
+
+ img_i2s_out_writel(i2s, i2s->suspend_ctl, IMG_I2S_OUT_CTL);
+
+ if (pm_runtime_status_suspended(dev))
+ img_i2s_out_runtime_suspend(dev);
return 0;
}
+#endif
static const struct of_device_id img_i2s_out_of_match[] = {
{ .compatible = "img,i2s-out" },
@@ -545,8 +606,9 @@ static const struct of_device_id img_i2s_out_of_match[] = {
MODULE_DEVICE_TABLE(of, img_i2s_out_of_match);
static const struct dev_pm_ops img_i2s_out_pm_ops = {
- SET_RUNTIME_PM_OPS(img_i2s_out_suspend,
- img_i2s_out_resume, NULL)
+ SET_RUNTIME_PM_OPS(img_i2s_out_runtime_suspend,
+ img_i2s_out_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(img_i2s_out_suspend, img_i2s_out_resume)
};
static struct platform_driver img_i2s_out_driver = {