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Subject: Re: [linux-sunxi] Re: [PATCH 2/3] ARM: dts: sun7i: Add RGB666 pins
 definition
To:     Paul Kocialkowski <contact@paulk.fr>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org, linux-sunxi@googlegroups.com
Cc:     Mark Rutland <mark.rutland@arm.com>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Russell King <linux@armlinux.org.uk>,
        David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org>,
        Rob Herring <robh+dt@kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>
References: <20180410213129.24049-1-contact@paulk.fr>
 <20180410213129.24049-2-contact@paulk.fr>
 <e7f68882-c333-12ac-c122-20b0d7b65666@micronovasrl.com>
 <588060914d3b6899f6812daa4969f61bf750c91b.camel@paulk.fr>
From:   Giulio Benetti <giulio.benetti@micronovasrl.com>
Message-ID: <1f71f768-2c3d-a241-a368-e55f4677a279@micronovasrl.com>
Date:   Thu, 12 Apr 2018 01:19:54 +0200
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Hi,

Il 12/04/2018 01:09, Paul Kocialkowski ha scritto:
> Hi,
> 
> Le jeudi 12 avril 2018 à 00:22 +0200, Giulio Benetti a écrit :
>> Hi,
>>
>> Il 10/04/2018 23:31, Paul Kocialkowski ha scritto:
>>> This adds the pins definition for RGB666 LCD panels on the A20. It
>>> was
>>> imported from the A33 definition, that concernes the same set of
>>> pins.
>>>
>>> Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
>>> ---
>>>    arch/arm/boot/dts/sun7i-a20.dtsi | 8 ++++++++
>>>    1 file changed, 8 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi
>>> b/arch/arm/boot/dts/sun7i-a20.dtsi
>>> index e529e4ff2174..f46af8675cfa 100644
>>> --- a/arch/arm/boot/dts/sun7i-a20.dtsi
>>> +++ b/arch/arm/boot/dts/sun7i-a20.dtsi
>>> @@ -781,6 +781,14 @@
>>>    				function = "ir1";
>>>    			};
>>>    
>>> +			lcd_rgb666_pins: lcd_rgb666@0 {
>>
>> I point you to this Thread and back:
>> https://lists.freedesktop.org/archives/dri-devel/2018-March/170688.htm
>> l
>>
>> I did the same for rgb888, so good part is discussed.
>>
>> IMHO I would:
>> - call lcd0_rgb666_pins, since this is for LCD0 interface
>> - same as above, call lcd0-rgb666, take care about using "-" instad
>> of
>> "_" that can cause DTC warnings.
>> - remove @0 since only this set can achieve LCD0 RGB666, and I
>>     don't think there will be other combinations.
> 
> I even responded to that discussion but overlooked these aspects when
> crafting this patch. Thanks for the summary :)

You're welcome, I've forgotten you've been involved discussing
that patch so i've pointed you something yours :)
Anyway it should help.

Best regards

-- 
Giulio Benetti
CTO

MICRONOVA SRL
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> 
>> Kind regards
>>
>> -- 
>> Giulio Benetti
>> CTO
>>
>> MICRONOVA SRL
>> Sede: Via A. Niedda 3 - 35010 Vigonza (PD)
>> Tel. 049/8931563 - Fax 049/8931346
>> Cod.Fiscale - P.IVA 02663420285
>> Capitale Sociale € 26.000 i.v.
>> Iscritta al Reg. Imprese di Padova N. 02663420285
>> Numero R.E.A. 258642
>>
>>
>>> +				pins = "PD2", "PD3", "PD4", "PD5",
>>> "PD6", "PD7",
>>> +				       "PD10", "PD11", "PD12",
>>> "PD13", "PD14", "PD15",
>>> +				       "PD18", "PD19", "PD20",
>>> "PD21", "PD22", "PD23",
>>> +				       "PD24", "PD25", "PD26",
>>> "PD27";
>>> +				function = "lcd0";
>>> +			};
>>> +
>>>    			mmc0_pins_a: mmc0@0 {
>>>    				pins = "PF0", "PF1", "PF2",
>>>    				       "PF3", "PF4", "PF5";
>>>
>>
>>