linux-kernel - Re: [PATCH 1/2] drm/mediatek: set vblank_disable

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Date:   Thu, 29 Sep 2016 13:36:23 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Bibby Hsieh <bibby.hsieh@...iatek.com>
CC:     David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        Yingjoe Chen <yingjoe.chen@...iatek.com>,
        Cawa Cheng <cawa.cheng@...iatek.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        "Philipp Zabel" <p.zabel@...gutronix.de>,
        YT Shen <yt.shen@...iatek.com>,
        "Thierry Reding" <thierry.reding@...il.com>,
        Mao Huang <littlecvr@...omium.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Sascha Hauer" <kernel@...gutronix.de>
Subject: Re: [PATCH 1/2] drm/mediatek: set vblank_disable_allowed to true

Acked-by: CK Hu <ck.hu@...iatek.com>

On Thu, 2016-09-29 at 11:29 +0800, Bibby Hsieh wrote:
> MTK DRM driver didn't set the vblank_disable_allowed to
> true, it cause that the irq_handler is called every
> 16.6 ms (every vblank) when the display didn't be updated.
> 
> Signed-off-by: Bibby Hsieh <bibby.hsieh@...iatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index eebb7d8..941ec5f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -200,6 +200,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
>  	if (ret < 0)
>  		goto err_component_unbind;
>  
> +	drm->vblank_disable_allowed = true;
>  	drm_kms_helper_poll_init(drm);
>  	drm_mode_config_reset(drm);
>