linux-kernel - Re: [PATCH] drm/mediatek: component type MTK_DISP_OVL

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Message-ID: <1582607261.2773.0.camel@mtksdaap41>
Date:   Tue, 25 Feb 2020 13:07:41 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Phong LE <ple@...libre.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/mediatek: component type MTK_DISP_OVL_2L is not
 correctly handled

Hi, Phong:

On Thu, 2020-02-20 at 09:36 +0800, CK Hu wrote:
> Hi, Phong:
> 
> On Wed, 2020-02-19 at 15:13 +0100, Phong LE wrote:
> > The larb device remains NULL if the type is MTK_DISP_OVL_2L.
> > A kernel panic is raised when a crtc uses mtk_smi_larb_get or
> > mtk_smi_larb_put.
> > 
> 
> Reviewed-by: CK Hu <ck.hu@...iatek.com>
> 

Applied to mediatek-drm-fixes-5.6 [1], thanks.

[1]
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-fixes-5.6

Regards,
CK

> > Signed-off-by: Phong LE <ple@...libre.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 1f5a112bb034..57c88de9a329 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -471,6 +471,7 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
> >  	/* Only DMA capable components need the LARB property */
> >  	comp->larb_dev = NULL;
> >  	if (type != MTK_DISP_OVL &&
> > +	    type != MTK_DISP_OVL_2L &&
> >  	    type != MTK_DISP_RDMA &&
> >  	    type != MTK_DISP_WDMA)
> >  		return 0;
>