linux-kernel - Re: [RFC 1/6] fbdev: simplefb: add init through platform

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Message-ID: <51CB5176.5000404@wwwdotorg.org>
Date:	Wed, 26 Jun 2013 14:39:18 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	David Herrmann <dh.herrmann@...il.com>
CC:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Dave Airlie <airlied@...il.com>, linux-fbdev@...r.kernel.org,
	Stephen Warren <swarren@...dia.com>,
	Olof Johansson <olof@...om.net>
Subject: Re: [RFC 1/6] fbdev: simplefb: add init through platform_data

On 06/24/2013 04:27 PM, David Herrmann wrote:
> If we create proper platform-devices in x86 boot-code, we can use simplefb
> for VBE or EFI framebuffers, too. However, there is normally no OF support
> so we introduce a platform_data object so x86 boot-code can pass the
> paramaters via plain old platform-data.
> 
> This also removes the OF dependency as it is not needed. The headers
> provide proper dummies for the case OF is disabled.
> 
> Furthermore, we move the FORMAT-definitions to the common platform header
> so initialization code can use it to transform "struct screen_info" to
> the right format-name.

> diff --git a/include/linux/platform_data/simplefb.h b/include/linux/platform_data/simplefb.h

> +/* the framebuffer size and location is available as IORESOURCE_MEM */
> +struct simplefb_platform_data {
> +	u32 width;
> +	u32 height;
> +	u32 stride;
> +	char format[64];
> +};

Any reason not to make format:

const char *format;

You should be able to initialize that just as easily in platform code,
either as static data or at runtime, I think.
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