linux-kernel - Re: Intel KMS + fbcon + Mplayer

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Message-Id: <CCB52791-FFE9-487A-97E8-C902622CC162@vmware.com>
Date:	Wed, 29 Apr 2009 15:15:23 +0200
From:	Jakob Bornecrantz <jakob@...are.com>
To:	Peter Hanzel <hanzelpeter@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fbdev-devel@...ts.sourceforge.net" 
	<linux-fbdev-devel@...ts.sourceforge.net>,
	"dri-devel@...ts.sourceforge.net" <dri-devel@...ts.sourceforge.net>
Subject: Re: Intel KMS + fbcon + Mplayer

On 29 apr 2009, at 12.04, Peter Hanzel wrote:
> Hello.
>
> I have tried Intel KMS in kernel 2.6.91.1 with fbcon. I am using only
> framebuffer console.
> Most fb apps works, but I have problem with mplayer.
> The init works but the video is badly displayed.
> I have investigated the problem and found, that for my laptop mode
> 1280x800-32.
>
> The ioctl on /dev/fb0 FBIOGET_VSCREENINFO returns.
> var.bits_per_pixel=32
> var.transp.length = 0.
>
> So the mplayer thinks we are in 24 bit mode (maybe this is bug in  
> mplayer,
> because bits_per_pixel is 32).
>
> But next I have checked it with kernel vesafb and for same mode
> (1280x800-32, vga=0x362 )
> The fb ioctl returns
> var.bits_per_pixel=32
> var.transp.length = 8.
>
> So is this intentionally made so. Because I think this mode use only  
> red,
> green,blue and no transp. But for one pixel you must write 4 bytes.  
> (so
> transp is not used).

Hmm, if I remember correctly from running mplayer in the early days of  
kms mplayer has two fbdev drivers and I think that only #2 worked. It  
did worked back then but it was a long time ago. Heck it was one of  
the first things we demoed kms with.

Cheers Jakob.
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