linux-kernel - Re: [PATCH 3/3] drm/panic: Remove build time dependency with FRAMEBUFFER

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Message-ID: <Zpfex7mO2JcdVHWe@phenom.ffwll.local>
Date: Wed, 17 Jul 2024 17:09:59 +0200
From: Daniel Vetter <daniel.vetter@...ll.ch>
To: Javier Martinez Canillas <javierm@...hat.com>
Cc: Jocelyn Falempe <jfalempe@...hat.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
	Helge Deller <deller@....de>,
	"Jiri Slaby (SUSE)" <jirislaby@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Samuel Thibault <samuel.thibault@...-lyon.org>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	linux-fbdev@...r.kernel.org
Subject: Re: [PATCH 3/3] drm/panic: Remove build time dependency with
 FRAMEBUFFER_CONSOLE

On Wed, Jul 17, 2024 at 12:09:46PM +0200, Javier Martinez Canillas wrote:
> Jocelyn Falempe <jfalempe@...hat.com> writes:
> 
> > Now that fbcon has the skip_panic option, there is no more conflicts
> > between drm_panic and fbcon.
> > Remove the build time dependency, so they can be both enabled.
> >
> > Signed-off-by: Jocelyn Falempe <jfalempe@...hat.com>
> > ---
> >  drivers/gpu/drm/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> > index 6dd0016fc9cd..a22cab218004 100644
> > --- a/drivers/gpu/drm/Kconfig
> > +++ b/drivers/gpu/drm/Kconfig
> > @@ -107,7 +107,7 @@ config DRM_KMS_HELPER
> >  
> >  config DRM_PANIC
> >  	bool "Display a user-friendly message when a kernel panic occurs"
> > -	depends on DRM && !(FRAMEBUFFER_CONSOLE && VT_CONSOLE)
> > +	depends on DRM
> 
> This is great. Thanks for finding an alternative approach! I don't see any
> issues this time, because there is no locking involved. But let's see what
> others think about it.

Looks like it should work, I did check the history of fbcon_is_active and
we've used that to force/disable panic output for fbcon in the past. So I
think it's the right tool.

> Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>

Cheers, Sima
> 
> -- 
> Best regards,
> 
> Javier Martinez Canillas
> Core Platforms
> Red Hat
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch