Date: Wed, 3 Dec 2014 23:40:00 +0000
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Andy Yan <andy.yan@rock-chips.com>
Cc: airlied@linux.ie, Philipp Zabel <p.zabel@pengutronix.de>, heiko@sntech.de,
        fabio.estevam@freescale.com,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Grant Likely <grant.likely@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawn.guo@linaro.org>,
        Josh Boyer <jwboyer@redhat.com>, Sean Paul <seanpaul@chromium.org>,
        Inki Dae <inki.dae@samsung.com>, Dave Airlie <airlied@redhat.com>,
        Arnd Bergmann <arnd@arndb.de>, Lucas Stach <l.stach@pengutronix.de>,
        Zubair.Kakakhel@imgtec.com, djkurtz@google.com, ykk@rock-chips.com,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        devel@driverdev.osuosl.org, devicetree@vger.kernel.org,
        linux-rockchip@lists.infradead.org, jay.xu@rock-chips.com,
        Pawel Moll <pawel.moll@arm.com>, mark.yao@rock-chips.com,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        vladimir_zapolskiy@mentor.com, Kumar Gala <galak@codeaurora.org>
Subject: Re: [PATCH v16 03/12] drm: imx: imx-hdmi: convert imx-hdmi to
 drm_bridge mode
Message-ID: <20141203234000.GJ11285@n2100.arm.linux.org.uk>
References: <1417620408-30354-1-git-send-email-andy.yan@rock-chips.com>
 <1417620566-30496-1-git-send-email-andy.yan@rock-chips.com>
 <20141203153847.GC11285@n2100.arm.linux.org.uk>
 <547F3495.9070206@rock-chips.com>
 <20141203161122.GF11285@n2100.arm.linux.org.uk>
 <547F3A9F.30701@rock-chips.com>
 <20141203163318.GH11285@n2100.arm.linux.org.uk>
 <547F40B8.6060706@rock-chips.com>
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Sender: linux-kernel-owner@vger.kernel.org

On Thu, Dec 04, 2014 at 12:56:24AM +0800, Andy Yan wrote:
> Hi Russell:
> On 2014年12月04日 00:33, Russell King - ARM Linux wrote:
> >On Thu, Dec 04, 2014 at 12:30:23AM +0800, Andy Yan wrote:
> >>On 2014年12月04日 00:11, Russell King - ARM Linux wrote:
> >>>I meant that imx_hdmi_bind should be passed these, so that it needs to
> >>>know nothing about the struct device beyond the generic device structure.
> >>>In other words, the dw-hdmi core should not assume that the struct device
> >>>is part of a platform device.
> >>>
> >>    if so, how about the device tree properties  ddc-i2c-bus, reg-io-width,
> >>iahb, isfr,
> >>   they are all found by device?
> >If the device has a device tree node associated with it, it will have a
> >non-NULL dev->of_node - which is part of the generic device structure.
> >
>   so , I just need get the resource and irq number in the
> dw_hdmi-imx/rockchip ,than
>   pass them to imx_hdmi_bind, as the properties ddc-i2c-bus, reg-io-width,
> iahb,isfr, they
>   are still can be handled in imx_hdmi_bind ?

Basically, what I'm suggesting is just this change to imx_hdmi_bind():

 int imx_hdmi_bind(struct device *dev, struct device *master,
		  void *data, struct drm_encoder *encoder,
+		  const struct resource *iores, int irq,
		  const struct imx_hdmi_plat_data *plat_data)
 {
-	struct platform_device *pdev = to_platform_device(dev);
...
	}

-	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;
...
		return ret;

-	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hdmi->regs = devm_ioremap_resource(dev, iores);
	if (IS_ERR(hdmi->regs))

and supplying those as arguments from the caller.

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