diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/img/img-i2s-in.c | 88 |
1 files changed, 71 insertions, 17 deletions
diff --git a/sound/soc/img/img-i2s-in.c b/sound/soc/img/img-i2s-in.c index 3d151ddda937..d7fbb0a0a28b 100644 --- a/sound/soc/img/img-i2s-in.c +++ b/sound/soc/img/img-i2s-in.c @@ -16,6 +16,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/reset.h> #include <sound/core.h> @@ -64,6 +65,29 @@ struct img_i2s_in { u32 *suspend_ch_ctl; }; +static int img_i2s_in_runtime_suspend(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + + clk_disable_unprepare(i2s->clk_sys); + + return 0; +} + +static int img_i2s_in_runtime_resume(struct device *dev) +{ + struct img_i2s_in *i2s = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(i2s->clk_sys); + if (ret) { + dev_err(dev, "Unable to enable sys clock\n"); + return ret; + } + + return 0; +} + static inline void img_i2s_in_writel(struct img_i2s_in *i2s, u32 val, u32 reg) { writel(val, i2s->base + reg); @@ -281,7 +305,7 @@ static int img_i2s_in_hw_params(struct snd_pcm_substream *substream, static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct img_i2s_in *i2s = snd_soc_dai_get_drvdata(dai); - int i; + int i, ret; u32 chan_control_mask, lrd_set = 0, blkp_set = 0, chan_control_set = 0; u32 reg; @@ -321,6 +345,10 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) chan_control_mask = IMG_I2S_IN_CH_CTL_CLK_TRANS_MASK; + ret = pm_runtime_get_sync(i2s->dev); + if (ret < 0) + return ret; + for (i = 0; i < i2s->active_channels; i++) img_i2s_in_ch_disable(i2s, i); @@ -340,6 +368,8 @@ static int img_i2s_in_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) for (i = 0; i < i2s->active_channels; i++) img_i2s_in_ch_enable(i2s, i); + pm_runtime_put(i2s->dev); + return 0; } @@ -429,9 +459,15 @@ static int img_i2s_in_probe(struct platform_device *pdev) return PTR_ERR(i2s->clk_sys); } - ret = clk_prepare_enable(i2s->clk_sys); - if (ret) - return ret; + pm_runtime_enable(&pdev->dev); + if (!pm_runtime_enabled(&pdev->dev)) { + ret = img_i2s_in_runtime_resume(&pdev->dev); + if (ret) + goto err_pm_disable; + } + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) + goto err_suspend; i2s->active_channels = 1; i2s->dma_data.addr = res->start + IMG_I2S_IN_RX_FIFO; @@ -449,7 +485,7 @@ static int img_i2s_in_probe(struct platform_device *pdev) if (IS_ERR(rst)) { if (PTR_ERR(rst) == -EPROBE_DEFER) { ret = -EPROBE_DEFER; - goto err_clk_disable; + goto err_suspend; } dev_dbg(dev, "No top level reset found\n"); @@ -471,35 +507,40 @@ static int img_i2s_in_probe(struct platform_device *pdev) IMG_I2S_IN_CH_CTL_JUST_MASK | IMG_I2S_IN_CH_CTL_FW_MASK, IMG_I2S_IN_CH_CTL); + pm_runtime_put(&pdev->dev); + i2s->suspend_ch_ctl = devm_kzalloc(dev, sizeof(*i2s->suspend_ch_ctl) * i2s->max_i2s_chan, GFP_KERNEL); if (!i2s->suspend_ch_ctl) { ret = -ENOMEM; - goto err_clk_disable; + goto err_suspend; } ret = devm_snd_soc_register_component(dev, &img_i2s_in_component, &i2s->dai_driver, 1); if (ret) - goto err_clk_disable; + goto err_suspend; ret = devm_snd_dmaengine_pcm_register(dev, &img_i2s_in_dma_config, 0); if (ret) - goto err_clk_disable; + goto err_suspend; return 0; -err_clk_disable: - clk_disable_unprepare(i2s->clk_sys); +err_suspend: + if (!pm_runtime_enabled(&pdev->dev)) + img_i2s_in_runtime_suspend(&pdev->dev); +err_pm_disable: + pm_runtime_disable(&pdev->dev); return ret; } static int img_i2s_in_dev_remove(struct platform_device *pdev) { - struct img_i2s_in *i2s = platform_get_drvdata(pdev); - - clk_disable_unprepare(i2s->clk_sys); + pm_runtime_disable(&pdev->dev); + if (!pm_runtime_status_suspended(&pdev->dev)) + img_i2s_in_runtime_suspend(&pdev->dev); return 0; } @@ -508,9 +549,15 @@ static int img_i2s_in_dev_remove(struct platform_device *pdev) static int img_i2s_in_suspend(struct device *dev) { struct img_i2s_in *i2s = dev_get_drvdata(dev); - int i; + int i, ret; u32 reg; + if (pm_runtime_status_suspended(dev)) { + ret = img_i2s_in_runtime_resume(dev); + if (ret) + return ret; + } + for (i = 0; i < i2s->max_i2s_chan; i++) { reg = img_i2s_in_ch_readl(i2s, i, IMG_I2S_IN_CH_CTL); i2s->suspend_ch_ctl[i] = reg; @@ -518,7 +565,7 @@ static int img_i2s_in_suspend(struct device *dev) i2s->suspend_ctl = img_i2s_in_readl(i2s, IMG_I2S_IN_CTL); - clk_disable_unprepare(i2s->clk_sys); + img_i2s_in_runtime_suspend(dev); return 0; } @@ -526,10 +573,12 @@ static int img_i2s_in_suspend(struct device *dev) static int img_i2s_in_resume(struct device *dev) { struct img_i2s_in *i2s = dev_get_drvdata(dev); - int i; + int i, ret; u32 reg; - clk_prepare_enable(i2s->clk_sys); + ret = img_i2s_in_runtime_resume(dev); + if (ret) + return ret; for (i = 0; i < i2s->max_i2s_chan; i++) { reg = i2s->suspend_ch_ctl[i]; @@ -538,6 +587,9 @@ static int img_i2s_in_resume(struct device *dev) img_i2s_in_writel(i2s, i2s->suspend_ctl, IMG_I2S_IN_CTL); + if (pm_runtime_status_suspended(dev)) + img_i2s_in_runtime_suspend(dev); + return 0; } #endif @@ -549,6 +601,8 @@ static const struct of_device_id img_i2s_in_of_match[] = { MODULE_DEVICE_TABLE(of, img_i2s_in_of_match); static const struct dev_pm_ops img_i2s_in_pm_ops = { + SET_RUNTIME_PM_OPS(img_i2s_in_runtime_suspend, + img_i2s_in_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(img_i2s_in_suspend, img_i2s_in_resume) }; 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