linux-kernel - Re: [RFC v2 3/5] drm/mediatek: add *driver

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Date:	Mon, 30 May 2016 12:45:53 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	CK Hu <ck.hu@...iatek.com>
Cc:	yt.shen@...iatek.com, Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	emil.l.velikov@...il.com, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	Mao Huang <littlecvr@...omium.org>,
	srv_heupstream@...iatek.com, Rob Herring <robh+dt@...nel.org>,
	linux-mediatek@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	yingjoe.chen@...iatek.com, Sascha Hauer <kernel@...gutronix.de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC v2 3/5] drm/mediatek: add *driver_data for different
 hardware settings

On Mon, May 23, 2016 at 05:43:02PM +0800, CK Hu wrote:
> Hi, YT:
> 
> One comment below.
> 
> On Fri, 2016-05-20 at 23:05 +0800, yt.shen@...iatek.com wrote:
> > From: YT Shen <yt.shen@...iatek.com>
> > 
> > There are some hardware settings changed, between MT8173 & MT2701:
> > DISP_OVL address offset changed, color format definition changed.
> > DISP_RDMA fifo size changed.
> > DISP_COLOR offset changed.
> > 
> > Signed-off-by: YT Shen <yt.shen@...iatek.com>
> > ---
> > +
> > +static inline struct mtk_ddp_comp_driver_data *mtk_ovl_get_driver_data(
> > +	struct platform_device *pdev)
> > +{
> > +	const struct of_device_id *of_id =
> > +		of_match_device(mtk_disp_ovl_driver_dt_match, &pdev->dev);
> > +
> > +	return (struct mtk_ddp_comp_driver_data *)of_id->data;
> > +}
> > +
> > +static inline struct mtk_ddp_comp_driver_data *mtk_rdma_get_driver_data(
> > +	struct platform_device *pdev)
> > +{
> > +	const struct of_device_id *of_id =
> > +		of_match_device(mtk_disp_rdma_driver_dt_match, &pdev->dev);
> > +
> > +	return (struct mtk_ddp_comp_driver_data *)of_id->data;
> > +}
> > +
> > +static inline struct mtk_ddp_comp_driver_data *mtk_color_get_driver_data(
> > +	struct device_node *node)
> > +{
> > +	const struct of_device_id *of_id =
> > +		of_match_node(mtk_disp_color_driver_dt_match, node);
> > +
> > +	return (struct mtk_ddp_comp_driver_data *)of_id->data;
> > +}
> > + 
> 
> These three functions looks the same with different parameter:
> mtk_disp_ovl_driver_dt_match, mtk_disp_rdma_driver_dt_match, and
> mtk_disp_color_driver_dt_match. So merge them to prevent duplicated
> code.

I think what you really want is of_device_get_match_data().

Thierry

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