linux-kernel - Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller

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Date:   Mon, 17 Oct 2016 12:42:32 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Tomi Valkeinen <tomi.valkeinen@...com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Russell King <linux@...linux.org.uk>,
        Karl Beldan <karl.beldan@...il.com>
CC:     LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-drm <dri-devel@...ts.freedesktop.org>,
        linux-devicetree <devicetree@...r.kernel.org>,
        Jyri Sarha <jsarha@...com>, David Airlie <airlied@...ux.ie>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Karl Beldan <kbeldan@...libre.com>
Subject: Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller

On Monday 17 October 2016 11:26 AM, Tomi Valkeinen wrote:
> On 15/10/16 20:42, Sekhar Nori wrote:
> 
>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>>> index f79e1b9..32908ae 100644
>>> --- a/arch/arm/boot/dts/da850.dtsi
>>> +++ b/arch/arm/boot/dts/da850.dtsi
>>
>>> @@ -399,6 +420,14 @@
>>>  				<&edma0 0 1>;
>>>  			dma-names = "tx", "rx";
>>>  		};
>>> +
>>> +		display: display@...000 {
>>> +			compatible = "ti,am33xx-tilcdc", "ti,da850-tilcdc";
>>
>> This should instead be:
>>
>> compatible = "ti,da850-tilcdc", "ti,am33xx-tilcdc";
>>
>> as the closest match should appear first in the list.
> 
> Actually I don't think that's correct. The LCDC on da850 is not
> compatible with the LCDC on AM335x. I think it should be just
> "ti,da850-tilcdc".

So if "ti,am33xx-tilcdc" is used, the display wont work at all? If thats
the case, I wonder how the patch passed testing. Bartosz?

Thanks,
Sekhar