linux-kernel - Re: drm/komeda: Initialize and enable output polling on Komeda

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Message-ID: <20190809063041.GA31698@jamwan02-TSP300>
Date:   Fri, 9 Aug 2019 06:30:48 +0000
From:   "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To:     "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
CC:     Liviu Dudau <Liviu.Dudau@....com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "seanpaul@...omium.org" <seanpaul@...omium.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Brian Starkey <Brian.Starkey@....com>,
        Ayan Halder <Ayan.Halder@....com>,
        "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
        nd <nd@....com>
Subject: Re: drm/komeda: Initialize and enable output polling on Komeda

On Fri, Aug 02, 2019 at 08:07:52AM +0000, Lowry Li (Arm Technology China) wrote:
> From: "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
> 
> Initialize and enable output polling on Komeda.
> 
> Changes since v1:
> 1. Enable the polling before registering the driver;
> 2. Disable the polling after unregistering the driver.
> 
> Changes since v2:
> 1. If driver register failed, disable the polling.
> 
> Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@....com>
> ---
>  drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> index 419a8b0..d50e75f 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> @@ -15,6 +15,7 @@
>  #include <drm/drm_gem_framebuffer_helper.h>
>  #include <drm/drm_irq.h>
>  #include <drm/drm_vblank.h>
> +#include <drm/drm_probe_helper.h>
>  
>  #include "komeda_dev.h"
>  #include "komeda_framebuffer.h"
> @@ -315,6 +316,8 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
>  
>  	drm->irq_enabled = true;
>  
> +	drm_kms_helper_poll_init(drm);
> +
>  	err = drm_dev_register(drm, 0);
>  	if (err)
>  		goto cleanup_mode_config;
> @@ -322,6 +325,7 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
>  	return kms;
>  
>  cleanup_mode_config:
> +	drm_kms_helper_poll_fini(drm);
>  	drm->irq_enabled = false;
>  	drm_mode_config_cleanup(drm);
>  	komeda_kms_cleanup_private_objs(kms);
> @@ -338,6 +342,7 @@ void komeda_kms_detach(struct komeda_kms_dev *kms)
>  	drm->irq_enabled = false;
>  	mdev->funcs->disable_irq(mdev);
>  	drm_dev_unregister(drm);
> +	drm_kms_helper_poll_fini(drm);
>  	component_unbind_all(mdev->dev, drm);
>  	komeda_kms_cleanup_private_objs(kms);
>  	drm_mode_config_cleanup(drm);

Looks good to me.

Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>