linux-kernel - Re: [Intel-gfx] [PATCH 5/5] drm/i915: Kick out vga console

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Date:	Mon, 07 Jul 2014 22:53:16 -0400
From:	Ed Tomlinson <edt@....ca>
To:	Chris Wilson <chris@...is-wilson.co.uk>,
	Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
	DRI Development <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Dave Airlie <airlied@...ux.ie>
Subject: Re: [Intel-gfx] [PATCH 5/5] drm/i915: Kick out vga console

Hi Daniel,

The patch below also works.  You can use my Tested By for it.

Thanks
Ed Tomlinson <edtoml@...il.com>

PS. I _really_ need to get a serial console working on my i7 box.

On Monday 07 July 2014 14:26:54 Daniel Vetter wrote:
> On Mon, Jul 07, 2014 at 06:45:49AM -0400, Ed Tomlinson wrote:
> > Daniel,
> > 
> > I am not quite sure I understand what you want me to test?
> > Do you want me to try it without:
> > 
> > > > +               if (ret == 0) {
> > > > +                       ret = do_unregister_con_driver(&vga_con);
> 
> Below the diff of what I mean.
> -Daniel
> 
> 
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 5e583a1838f8..bd8517151479 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1466,12 +1466,13 @@ static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
>  #else
>  static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
>  {
> -	int ret;
> +	int ret = 0;
>  
>  	DRM_INFO("Replacing VGA console driver\n");
>  
>  	console_lock();
> -	ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
> +	if (con_is_bound(&vga_con))
> +		ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
>  	if (ret == 0) {
>  		ret = do_unregister_con_driver(&vga_con);
>  
> 

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