[Patch v3 ] drm/msm/dpu: Correct dpu destroy and disable order

[Patch v3 ] drm/msm/dpu: Correct dpu destroy and disable order

[Jayant Shekhar]

In case of msm drm bind failure, pm runtime put sync
is called from dsi driver which issues an asynchronous
put on mdss device. Subsequently when dpu_mdss_destroy
is triggered the change will make sure to put the mdss
device in suspend and clearing pending work if not
scheduled.

Changes in v2:
   - Removed double spacings [Jeykumar]

Changes in v3:
   - Fix clock on issue during bootup [Rajendra]

Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index fd9c893..df8127b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -156,18 +156,16 @@ static void dpu_mdss_destroy(struct drm_device *dev)
 	struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
 	struct dss_module_power *mp = &dpu_mdss->mp;
 
+	pm_runtime_suspend(dev->dev);
+	pm_runtime_disable(dev->dev);
 	_dpu_mdss_irq_domain_fini(dpu_mdss);
-
 	free_irq(platform_get_irq(pdev, 0), dpu_mdss);
-
 	msm_dss_put_clk(mp->clk_config, mp->num_clk);
 	devm_kfree(&pdev->dev, mp->clk_config);
 
 	if (dpu_mdss->mmio)
 		devm_iounmap(&pdev->dev, dpu_mdss->mmio);
 	dpu_mdss->mmio = NULL;
-
-	pm_runtime_disable(dev->dev);
 	priv->mdss = NULL;
 }
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [Patch v3 ] drm/msm/dpu: Correct dpu destroy and disable order

[Rajendra Nayak]

On 11/19/2018 11:55 AM, Jayant Shekhar wrote:
> In case of msm drm bind failure, pm runtime put sync
> is called from dsi driver which issues an asynchronous
> put on mdss device. Subsequently when dpu_mdss_destroy
> is triggered the change will make sure to put the mdss
> device in suspend and clearing pending work if not
> scheduled.
> 
> Changes in v2:
>     - Removed double spacings [Jeykumar]
> 
> Changes in v3:
>     - Fix clock on issue during bootup [Rajendra]
> 
> Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>

So I no longer see the clock usecount mismatch with this patch now,
that I had earlier reported with the v2.

Tested-by: Rajendra Nayak <rnayak@codeaurora.org>

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 6 ++----
>   1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> index fd9c893..df8127b 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> @@ -156,18 +156,16 @@ static void dpu_mdss_destroy(struct drm_device *dev)
>   	struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
>   	struct dss_module_power *mp = &dpu_mdss->mp;
>   
> +	pm_runtime_suspend(dev->dev);
> +	pm_runtime_disable(dev->dev);
>   	_dpu_mdss_irq_domain_fini(dpu_mdss);
> -
>   	free_irq(platform_get_irq(pdev, 0), dpu_mdss);
> -
>   	msm_dss_put_clk(mp->clk_config, mp->num_clk);
>   	devm_kfree(&pdev->dev, mp->clk_config);
>   
>   	if (dpu_mdss->mmio)
>   		devm_iounmap(&pdev->dev, dpu_mdss->mmio);
>   	dpu_mdss->mmio = NULL;
> -
> -	pm_runtime_disable(dev->dev);
>   	priv->mdss = NULL;
>   }
>   
> 

Re: [Patch v3 ] drm/msm/dpu: Correct dpu destroy and disable order

[Jeykumar Sankaran]

On 2018-11-18 22:25, Jayant Shekhar wrote:
> In case of msm drm bind failure, pm runtime put sync
> is called from dsi driver which issues an asynchronous
> put on mdss device. Subsequently when dpu_mdss_destroy
> is triggered the change will make sure to put the mdss
> device in suspend and clearing pending work if not
> scheduled.
> 
> Changes in v2:
>    - Removed double spacings [Jeykumar]
> 
> Changes in v3:
>    - Fix clock on issue during bootup [Rajendra]
> 
> Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>
> ---

Acked-by: Jeykumar Sankaran <jsanka@codeaurora.org>

>  drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> index fd9c893..df8127b 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
> @@ -156,18 +156,16 @@ static void dpu_mdss_destroy(struct drm_device 
> *dev)
>  	struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
>  	struct dss_module_power *mp = &dpu_mdss->mp;
> 
> +	pm_runtime_suspend(dev->dev);
> +	pm_runtime_disable(dev->dev);
>  	_dpu_mdss_irq_domain_fini(dpu_mdss);
> -
>  	free_irq(platform_get_irq(pdev, 0), dpu_mdss);
> -
>  	msm_dss_put_clk(mp->clk_config, mp->num_clk);
>  	devm_kfree(&pdev->dev, mp->clk_config);
> 
>  	if (dpu_mdss->mmio)
>  		devm_iounmap(&pdev->dev, dpu_mdss->mmio);
>  	dpu_mdss->mmio = NULL;
> -
> -	pm_runtime_disable(dev->dev);
>  	priv->mdss = NULL;
>  }

-- 
Jeykumar S