diff options
Diffstat (limited to 'sound/soc/img/img-i2s-out.c')
| -rw-r--r-- | sound/soc/img/img-i2s-out.c | 120 |
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 = { |