linux-kernel - Re: [RFC PATCHv3 1/6] arm: Initial TI-Nspire support

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Message-Id: <453A23B8-7FE0-42D6-BBEC-B6CC3604EE01@gmail.com>
Date:	Sun, 12 May 2013 19:22:45 +1000
From:	Daniel Tang <dt.tangr@...il.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	"fabian@...ter-vogt.de Vogt" <fabian@...ter-vogt.de>,
	Lionel Debroux <lionel_debroux@...oo.fr>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCHv3 1/6] arm: Initial TI-Nspire support


On 12/05/2013, at 7:06 PM, Russell King - ARM Linux <linux@....linux.org.uk> wrote:

> On Sun, May 12, 2013 at 02:22:56PM +1000, Daniel Tang wrote:
>> 
>> +	.bpp		= 8,
>> +	.grayscale	= 1
>> +};
> 
> Still no capabilities in the above - how does the CLCD controller know
> which of BGR or RGB output and which format these panels support?
> 
> Each entry needs a .caps = CLCD_CAP_xxx | CLCD_CAP_xxx listing the
> formats supported there.
> 
> Unless panels and the board have a .caps entry, the caps system won't
> be used.

Fair enough.

> 
>> +static struct clcd_board nspire_clcd_data = {
>> +       .name           = "LCD",
>> +       .caps           = CLCD_CAP_ALL,
> 
> Your board has logic to support the RGB444/BGR444 mode?  If not, setting
> CLCD_CAP_ALL is incorrect.

I believe the grayscale panel supports the xGx444 modes - unsure about the colour one. Since I'm using the same struct clcd_board for both panels, I thought I'd just set caps to work with both to simplify.

Should I set board caps to panel caps on setup?

Cheers,--
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