linux-kernel - Re: [Linux-fbdev-devel] [PATCH] vga16fb: fix color component length for pseudocolor modes

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Date:	Wed, 1 Apr 2009 18:58:56 +0200
From:	Krzysztof Helt <krzysztof.h1@...zta.fm>
To:	spock@...too.org
Cc:	linux-kernel@...r.kernel.org,
	linux-fbdev-devel@...ts.sourceforge.net
Subject: Re: [Linux-fbdev-devel] [PATCH] vga16fb: fix color component length
 for pseudocolor modes

On Tue, 31 Mar 2009 00:05:24 +0200
Michal Januszewski <spock@...too.org> wrote:

> vga16fb incorrectly sets the length of the color fields to 6 or 2 bits
> for PSEUDOCOLOR modes, for which either 8 or 4 bits are used per pixel.
> Fix this by setting the length to 8 or 4, respectively.
> 
> Signed-off-by: Michal Januszewski <spock@...too.org>
> ---
> diff --git a/drivers/video/vga16fb.c b/drivers/video/vga16fb.c
> index 5b29389..50033b9 100644
> --- a/drivers/video/vga16fb.c
> +++ b/drivers/video/vga16fb.c
> @@ -506,7 +506,7 @@ static int vga16fb_check_var(struct fb_var_screeninfo *var,
>  	var->red.offset = var->green.offset = var->blue.offset = 
>  	var->transp.offset = 0;
>  	var->red.length = var->green.length = var->blue.length =
> -		(par->isVGA) ? 6 : 2;
> +		(par->isVGA) ? 8 : 4;
>  	var->transp.length = 0;
>  	var->activate = FB_ACTIVATE_NOW;
>  	var->height = -1;
> 

There is the second place to change in the vga16fb_probe().

Regards,
Krzysztof

 	
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