On Thu, Apr 11, 2019 at 12:22:40AM +0200, Niklas Söderlund wrote:
> Both the Renesas and Uniphier implementations perform actions which
> affect runtime PM before calling into the core tmio_mmc_host_probe()
> which enabled runtime PM. Move pm_runtime_enable() from the core and
> tmio_mmc_host_probe() into each drivers probe() so it can be called
> before any clocks or other resources are switched on.
> 
> Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---

Thanks for keeping at this. Setting up the APE6 board for further tests
was painful, I understood that.

Since you lost the cover-letter from the last series, I think it should
be mentioned that this fixes a clock imbalance problem (at least on
Gen3).

For the APE6 tests, we need to wait until Geert comes back. I surely
would like his input. And Yamada-san's, too, to make sure his platform
also benefits.

>  drivers/mmc/host/renesas_sdhi_core.c |  6 ++++++
>  drivers/mmc/host/tmio_mmc.c          |  5 +++++
>  drivers/mmc/host/tmio_mmc_core.c     | 11 +++++++++--
>  drivers/mmc/host/uniphier-sd.c       |  3 +++
>  4 files changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
> index 5e9e36ed2107a01c..db73f9f1b186f0ff 100644
> --- a/drivers/mmc/host/renesas_sdhi_core.c
> +++ b/drivers/mmc/host/renesas_sdhi_core.c
> @@ -770,6 +770,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
>  	/* All SDHI have SDIO status bits which must be 1 */
>  	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
>  
> +	pm_runtime_enable(&pdev->dev);
> +
>  	ret = renesas_sdhi_clk_enable(host);
>  	if (ret)
>  		goto efree;
> @@ -850,6 +852,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
>  efree:
>  	tmio_mmc_host_free(host);
>  
> +	pm_runtime_disable(&pdev->dev);
> +
>  	return ret;
>  }
>  EXPORT_SYMBOL_GPL(renesas_sdhi_probe);
> @@ -861,6 +865,8 @@ int renesas_sdhi_remove(struct platform_device *pdev)
>  	tmio_mmc_host_remove(host);
>  	renesas_sdhi_clk_disable(host);
>  
> +	pm_runtime_disable(&pdev->dev);
> +
>  	return 0;
>  }
>  EXPORT_SYMBOL_GPL(renesas_sdhi_remove);
> diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
> index 93e83ad25976e756..8539e10784b40961 100644
> --- a/drivers/mmc/host/tmio_mmc.c
> +++ b/drivers/mmc/host/tmio_mmc.c
> @@ -172,6 +172,8 @@ static int tmio_mmc_probe(struct platform_device *pdev)
>  	host->mmc->f_max = pdata->hclk;
>  	host->mmc->f_min = pdata->hclk / 512;
>  
> +	pm_runtime_enable(&pdev->dev);
> +
>  	ret = tmio_mmc_host_probe(host);
>  	if (ret)
>  		goto host_free;
> @@ -191,6 +193,7 @@ static int tmio_mmc_probe(struct platform_device *pdev)
>  	tmio_mmc_host_remove(host);
>  host_free:
>  	tmio_mmc_host_free(host);
> +	pm_runtime_disable(&pdev->dev);
>  cell_disable:
>  	if (cell->disable)
>  		cell->disable(pdev);
> @@ -207,6 +210,8 @@ static int tmio_mmc_remove(struct platform_device *pdev)
>  	if (cell->disable)
>  		cell->disable(pdev);
>  
> +	pm_runtime_disable(&pdev->dev);
> +
>  	return 0;
>  }
>  
> diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
> index 130b91cb0f8a3fd1..26c148d3c8a2e655 100644
> --- a/drivers/mmc/host/tmio_mmc_core.c
> +++ b/drivers/mmc/host/tmio_mmc_core.c
> @@ -1152,6 +1152,15 @@ void tmio_mmc_host_free(struct tmio_mmc_host *host)
>  }
>  EXPORT_SYMBOL_GPL(tmio_mmc_host_free);
>  
> +/**
> + * tmio_mmc_host_probe() - Common probe for all implementations
> + * @_host: Host to probe
> + *
> + * Perform tasks common to all implementations probe functions.
> + *
> + * The caller should have called pm_runtime_enable() prior to calling
> + * the common probe function.
> + */
>  int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
>  {
>  	struct platform_device *pdev = _host->pdev;
> @@ -1260,7 +1269,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
>  	pm_runtime_set_active(&pdev->dev);
>  	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
>  	pm_runtime_use_autosuspend(&pdev->dev);
> -	pm_runtime_enable(&pdev->dev);
>  
>  	ret = mmc_add_host(mmc);
>  	if (ret)
> @@ -1296,7 +1304,6 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
>  
>  	pm_runtime_dont_use_autosuspend(&pdev->dev);
>  	pm_runtime_put_sync(&pdev->dev);
> -	pm_runtime_disable(&pdev->dev);
>  }
>  EXPORT_SYMBOL_GPL(tmio_mmc_host_remove);
>  
> diff --git a/drivers/mmc/host/uniphier-sd.c b/drivers/mmc/host/uniphier-sd.c
> index 91a2be41edf6196b..49aad9a79c18d24a 100644
> --- a/drivers/mmc/host/uniphier-sd.c
> +++ b/drivers/mmc/host/uniphier-sd.c
> @@ -631,6 +631,7 @@ static int uniphier_sd_probe(struct platform_device *pdev)
>  	host->clk_disable = uniphier_sd_clk_disable;
>  	host->set_clock = uniphier_sd_set_clock;
>  
> +	pm_runtime_enable(&pdev->dev);
>  	ret = uniphier_sd_clk_enable(host);
>  	if (ret)
>  		goto free_host;
> @@ -652,6 +653,7 @@ static int uniphier_sd_probe(struct platform_device *pdev)
>  
>  free_host:
>  	tmio_mmc_host_free(host);
> +	pm_runtime_disable(&pdev->dev);
>  
>  	return ret;
>  }
> @@ -662,6 +664,7 @@ static int uniphier_sd_remove(struct platform_device *pdev)
>  
>  	tmio_mmc_host_remove(host);
>  	uniphier_sd_clk_disable(host);
> +	pm_runtime_disable(&pdev->dev);
>  
>  	return 0;
>  }
> -- 
> 2.21.0
>