Hi Marek,
On 2017년 01월 10일 21:57, Marek Szyprowski wrote:
> This patch adds pm_runtime_get/put calls to notify device core when MIC
> device is really in use. This is needed to let power domain with this
> device to be turned off when display is turned off.
>
> Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_mic.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> index a0def0be6d65..f643c380cb9a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_mic.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_mic.c
> @@ -19,6 +19,7 @@
> #include <linux/of_graph.h>
> #include <linux/clk.h>
> #include <linux/component.h>
> +#include <linux/pm_runtime.h>
> #include <drm/drmP.h>
> #include <linux/mfd/syscon.h>
> #include <linux/regmap.h>
> @@ -323,6 +324,7 @@ static void mic_post_disable(struct drm_bridge *bridge)
> for (i = NUM_CLKS - 1; i > -1; i--)
> clk_disable_unprepare(mic->clks[i]);
>
> + pm_runtime_put(mic->dev);
> mic->enabled = 0;
It is minor comment.
How about calling the pm_runtime_put() after 'mic->enabled = 0'?
I think that you better to call the runtime_pm funtcion after completing
the handle of data of mic device driver. Because this patch just notifies
the status.
>
> already_disabled:
> @@ -338,6 +340,8 @@ static void mic_pre_enable(struct drm_bridge *bridge)
> if (mic->enabled)
> goto already_enabled;
>
> + pm_runtime_get_sync(mic->dev);
> +
> for (i = 0; i < NUM_CLKS; i++) {
> ret = clk_prepare_enable(mic->clks[i]);
> if (ret < 0) {
> @@ -473,8 +477,18 @@ static int exynos_mic_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, mic);
>
> + pm_runtime_enable(dev);
> +
> + ret = component_add(dev, &exynos_mic_component_ops);
> + if (ret)
> + goto err_pm;
> +
> DRM_DEBUG_KMS("MIC has been probed\n");
> - return component_add(dev, &exynos_mic_component_ops);
> +
> + return 0;
> +
> +err_pm:
> + pm_runtime_disable(dev);
>
> err:
> return ret;
> @@ -483,6 +497,7 @@ static int exynos_mic_probe(struct platform_device *pdev)
> static int exynos_mic_remove(struct platform_device *pdev)
> {
> component_del(&pdev->dev, &exynos_mic_component_ops);
> + pm_runtime_disable(&pdev->dev);
> return 0;
> }
>
>
If this patch just notifies the status(enabled or disabled)
of mic device with pm runtime interface, looks good to me.
Reviewed-by: Chanwoo Choi <cw00.c...@samsung.com>
--
Best Regards,
Chanwoo Choi
S/W Center, Samsung Electronics
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