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

From	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller
Date	2016-10-17 09:30 +0200
Message-ID	<stawW-pA-3@gated-at.bofh.it> (permalink)
References	<soU7n-1nW-7@gated-at.bofh.it> <soU7n-1nW-17@gated-at.bofh.it> <ssBfQ-2lp-7@gated-at.bofh.it> <st97Q-7NQ-7@gated-at.bofh.it> <stanf-mk-1@gated-at.bofh.it>
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2016-10-17 9:12 GMT+02:00 Sekhar Nori <nsekhar@ti.com>:
> 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@213000 {
>>>> +                   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?
>

DA850 uses revision 1 of the IP while am33xx is equipped with rev 2.
The driver reads the appropriate register, detects the revision and
sets the corresponding field in struct tilcdc_drm_private in
tilcdc_load().

Thanks,
Bartosz

Thread

Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Sekhar Nori <nsekhar@ti.com> - 2016-10-15 19:50 +0200
  Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-10-15 21:50 +0200
  Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Tomi Valkeinen <tomi.valkeinen@ti.com> - 2016-10-17 08:00 +0200
    Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Sekhar Nori <nsekhar@ti.com> - 2016-10-17 09:20 +0200
      Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-10-17 09:30 +0200
      Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Tomi Valkeinen <tomi.valkeinen@ti.com> - 2016-10-17 09:40 +0200
        Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-10-17 13:50 +0200
          Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Tomi Valkeinen <tomi.valkeinen@ti.com> - 2016-10-17 14:40 +0200
            Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-10-17 14:50 +0200
            Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-10-17 16:10 +0200
              Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Sekhar Nori <nsekhar@ti.com> - 2016-10-20 12:10 +0200
                Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Tomi Valkeinen <tomi.valkeinen@ti.com> - 2016-10-20 12:30 +0200
                Re: [PATCH 2/2] ARM: dts: da850: add a node for the LCD controller Sekhar Nori <nsekhar@ti.com> - 2016-10-20 12:40 +0200

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