linux-kernel - Re: [PATCH v16 03/12] drm: imx: imx-hdmi: convert imx-hdmi to drm

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Message-ID: <1417623615.5124.19.camel@pengutronix.de>
Date:	Wed, 03 Dec 2014 17:20:15 +0100
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Andy Yan <andy.yan@...k-chips.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	airlied@...ux.ie, heiko@...ech.de, fabio.estevam@...escale.com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Josh Boyer <jwboyer@...hat.com>,
	Sean Paul <seanpaul@...omium.org>,
	Inki Dae <inki.dae@...sung.com>,
	Dave Airlie <airlied@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Lucas Stach <l.stach@...gutronix.de>,
	Zubair.Kakakhel@...tec.com, djkurtz@...gle.com, ykk@...k-chips.com,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, jay.xu@...k-chips.com,
	Pawel Moll <pawel.moll@....com>, mark.yao@...k-chips.com,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	vladimir_zapolskiy@...tor.com, Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v16 03/12] drm: imx: imx-hdmi: convert imx-hdmi to
 drm_bridge mode

Hi Andy,

Am Donnerstag, den 04.12.2014, 00:04 +0800 schrieb Andy Yan:
> On 2014年12月03日 23:38, Russell King - ARM Linux wrote:
> > On Wed, Dec 03, 2014 at 11:29:26PM +0800, Andy Yan wrote:
> >> +int imx_hdmi_bind(struct device *dev, struct device *master,
> >> +		  void *data, struct drm_encoder *encoder,
> >> +		  const struct imx_hdmi_plat_data *plat_data)
> >>   {
> >>   	struct platform_device *pdev = to_platform_device(dev);
> >> -	const struct of_device_id *of_id =
> >> -				of_match_device(imx_hdmi_dt_ids, dev);
> >>   	struct drm_device *drm = data;
> >>   	struct device_node *np = dev->of_node;
> >>   	struct device_node *ddc_node;
> >> @@ -1594,19 +1566,16 @@ static int imx_hdmi_bind(struct device *dev, struct device *master, void *data)
> >>   	struct resource *iores;
> >>   	int ret, irq;
> >>   
> >> -	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
> >> +	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
> >>   	if (!hdmi)
> >>   		return -ENOMEM;
> >>   
> >> -	hdmi->dev = dev;
> >> +	hdmi->plat_data = plat_data;
> >> +	hdmi->dev = &pdev->dev;
> >> +	hdmi->dev_type = plat_data->dev_type;
> >>   	hdmi->sample_rate = 48000;
> >>   	hdmi->ratio = 100;
> >> -
> >> -	if (of_id) {
> >> -		const struct platform_device_id *device_id = of_id->data;
> >> -
> >> -		hdmi->dev_type = device_id->driver_data;
> >> -	}
> >> +	hdmi->encoder = encoder;
> > I'd suggest changing imx_hdmi_bind() to take the struct resource and irq
> > number, and avoiding the platform device stuff altogether in here.
> >
>     Actually this is what the current code do: the resource and irq number
> are all handled in imx_hdmi_bind

It would be better if the bind function would not have to care about
platform resources, that should be handled in the probe function. I had
a patch to move them:

http://lists.freedesktop.org/archives/dri-devel/2014-May/059630.html

Maybe you could incorporate something like this?

regards
Philipp

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