linux-kernel - Re: [PATCH v3 1/3] Kconfig : Remove HAS_IOMEM dependency for Graphics support

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Date:   Wed, 21 Feb 2018 12:50:15 +0100
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Christian Borntraeger <borntraeger@...ibm.com>
Cc:     Farhan Ali <alifm@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-fbdev@...r.kernel.org, geert@...ux-m68k.org,
        tomi.valkeinen@...com, thuth@...hat.com
Subject: Re: [PATCH v3 1/3] Kconfig : Remove HAS_IOMEM dependency for
 Graphics support


On Wednesday, February 21, 2018 09:44:43 AM Christian Borntraeger wrote:
> 
> On 02/19/2018 04:47 PM, Farhan Ali wrote:
> > The 'commit e25df1205f37 ("[S390] Kconfig: menus with depends on HAS_IOMEM.")'
> > added the HAS_IOMEM dependecy for "Graphics support". This disabled the
> > "Graphics support" menu for S390. But if we enable VT layer for S390,
> > we would also need to enable the dummy console. So let's remove the
> > HAS_IOMEM dependency.
> > 
> > Move this dependency to sub menu items and console drivers that use
> > io memory.
> > 
> > Signed-off-by: Farhan Ali <alifm@...ux.vnet.ibm.com>
> 
> This patch is part of todays linux-next and so far no fallout was reported.
> Shall I take that patch via the s390kvm tree (then I would like to have
> an ack. Bart?) or is anybody on cc willing to take this?

I would like to see two things changed before acking this patch:

- add missing HAS_IOMEM dependency to VGA_CONSOLE

- extend "if HAS_IOMEM" in drivers/video/Kconfig to cover config items
  previously covered by this dependency (it should start before config
  HAVE_FB_ATMEL and end after config HDMI)

> Christian
> 
> 
> 
> > ---
> >  drivers/video/Kconfig         | 21 +++++++++++----------
> >  drivers/video/console/Kconfig |  4 ++--
> >  2 files changed, 13 insertions(+), 12 deletions(-)
> > 
> > diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> > index 3c20af9..8f10915 100644
> > --- a/drivers/video/Kconfig
> > +++ b/drivers/video/Kconfig
> > @@ -3,7 +3,6 @@
> >  #
> > 
> >  menu "Graphics support"
> > -	depends on HAS_IOMEM
> > 
> >  config HAVE_FB_ATMEL
> >  	bool
> > @@ -11,20 +10,22 @@ config HAVE_FB_ATMEL
> >  config SH_LCD_MIPI_DSI
> >  	bool
> > 
> > -source "drivers/char/agp/Kconfig"
> > +if HAS_IOMEM
> > +	source "drivers/char/agp/Kconfig"
> > 
> > -source "drivers/gpu/vga/Kconfig"
> > +	source "drivers/gpu/vga/Kconfig"
> > 
> > -source "drivers/gpu/host1x/Kconfig"
> > -source "drivers/gpu/ipu-v3/Kconfig"
> > +	source "drivers/gpu/host1x/Kconfig"
> > +	source "drivers/gpu/ipu-v3/Kconfig"
> > 
> > -source "drivers/gpu/drm/Kconfig"
> > +	source "drivers/gpu/drm/Kconfig"
> > 
> > -menu "Frame buffer Devices"
> > -source "drivers/video/fbdev/Kconfig"
> > -endmenu
> > +	menu "Frame buffer Devices"
> > +	source "drivers/video/fbdev/Kconfig"
> > +	endmenu
> > 
> > -source "drivers/video/backlight/Kconfig"
> > +        source "drivers/video/backlight/Kconfig"
> > +endif
> > 
> >  config VGASTATE
> >         tristate
> > diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
> > index 7f1f1fb..0023b16 100644
> > --- a/drivers/video/console/Kconfig
> > +++ b/drivers/video/console/Kconfig
> > @@ -85,7 +85,7 @@ config MDA_CONSOLE
> > 
> >  config SGI_NEWPORT_CONSOLE
> >          tristate "SGI Newport Console support"
> > -        depends on SGI_IP22 
> > +        depends on SGI_IP22 && HAS_IOMEM
> >          select FONT_SUPPORT
> >          help
> >            Say Y here if you want the console on the Newport aka XL graphics
> > @@ -153,7 +153,7 @@ config FRAMEBUFFER_CONSOLE_ROTATION
> > 
> >  config STI_CONSOLE
> >          bool "STI text console"
> > -        depends on PARISC
> > +        depends on PARISC && HAS_IOMEM
> >          select FONT_SUPPORT
> >          default y
> >          help

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics