[PATCH] ASoC: rockchip: spdif: Handle clk by pm runtime

[PATCH] ASoC: rockchip: spdif: Handle clk by pm runtime

[Sugar Zhang]

This patch handle the clk by pm runtime mechanism to simplify
the clk management.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

 sound/soc/rockchip/rockchip_spdif.c | 59 +++++++++++--------------------------
 1 file changed, 17 insertions(+), 42 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c
index 6635145..6748108 100644
--- a/sound/soc/rockchip/rockchip_spdif.c
+++ b/sound/soc/rockchip/rockchip_spdif.c
@@ -306,44 +306,22 @@ static int rk_spdif_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	spdif->hclk = devm_clk_get(&pdev->dev, "hclk");
-	if (IS_ERR(spdif->hclk)) {
-		dev_err(&pdev->dev, "Can't retrieve rk_spdif bus clock\n");
+	if (IS_ERR(spdif->hclk))
 		return PTR_ERR(spdif->hclk);
-	}
-	ret = clk_prepare_enable(spdif->hclk);
-	if (ret) {
-		dev_err(spdif->dev, "hclock enable failed %d\n", ret);
-		return ret;
-	}
 
 	spdif->mclk = devm_clk_get(&pdev->dev, "mclk");
-	if (IS_ERR(spdif->mclk)) {
-		dev_err(&pdev->dev, "Can't retrieve rk_spdif master clock\n");
-		ret = PTR_ERR(spdif->mclk);
-		goto err_disable_hclk;
-	}
-
-	ret = clk_prepare_enable(spdif->mclk);
-	if (ret) {
-		dev_err(spdif->dev, "clock enable failed %d\n", ret);
-		goto err_disable_clocks;
-	}
+	if (IS_ERR(spdif->mclk))
+		return PTR_ERR(spdif->mclk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(regs)) {
-		ret = PTR_ERR(regs);
-		goto err_disable_clocks;
-	}
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
 
 	spdif->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "hclk", regs,
 						  &rk_spdif_regmap_config);
-	if (IS_ERR(spdif->regmap)) {
-		dev_err(&pdev->dev,
-			"Failed to initialise managed register map\n");
-		ret = PTR_ERR(spdif->regmap);
-		goto err_disable_clocks;
-	}
+	if (IS_ERR(spdif->regmap))
+		return PTR_ERR(spdif->regmap);
 
 	spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR;
 	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -352,47 +330,44 @@ static int rk_spdif_probe(struct platform_device *pdev)
 	spdif->dev = &pdev->dev;
 	dev_set_drvdata(&pdev->dev, spdif);
 
-	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
-	pm_request_idle(&pdev->dev);
+	if (!pm_runtime_enabled(&pdev->dev)) {
+		ret = rk_spdif_runtime_resume(&pdev->dev);
+		if (ret)
+			goto err_pm_runtime;
+	}
 
 	ret = devm_snd_soc_register_component(&pdev->dev,
 					      &rk_spdif_component,
 					      &rk_spdif_dai, 1);
 	if (ret) {
 		dev_err(&pdev->dev, "Could not register DAI\n");
-		goto err_pm_runtime;
+		goto err_pm_suspend;
 	}
 
 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
 	if (ret) {
 		dev_err(&pdev->dev, "Could not register PCM\n");
-		goto err_pm_runtime;
+		goto err_pm_suspend;
 	}
 
 	return 0;
 
+err_pm_suspend:
+	if (!pm_runtime_status_suspended(&pdev->dev))
+		rk_spdif_runtime_suspend(&pdev->dev);
 err_pm_runtime:
 	pm_runtime_disable(&pdev->dev);
-err_disable_clocks:
-	clk_disable_unprepare(spdif->mclk);
-err_disable_hclk:
-	clk_disable_unprepare(spdif->hclk);
 
 	return ret;
 }
 
 static int rk_spdif_remove(struct platform_device *pdev)
 {
-	struct rk_spdif_dev *spdif = dev_get_drvdata(&pdev->dev);
-
 	pm_runtime_disable(&pdev->dev);
 	if (!pm_runtime_status_suspended(&pdev->dev))
 		rk_spdif_runtime_suspend(&pdev->dev);
 
-	clk_disable_unprepare(spdif->mclk);
-	clk_disable_unprepare(spdif->hclk);
-
 	return 0;
 }
 
-- 
2.7.4

Re: [PATCH] ASoC: rockchip: spdif: Handle clk by pm runtime

[Mark Brown]

On Mon, 13 Jul 2020 18:26:00 +0800, Sugar Zhang wrote:
> This patch handle the clk by pm runtime mechanism to simplify
> the clk management.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: rockchip: spdif: Handle clk by pm runtime
      commit: f50d67f9eff62f8078fe6e98ede3f4fb1defc361

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark