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

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Date:   Wed, 21 Feb 2018 11:32:17 +0100
From:   Cornelia Huck <cohuck@...hat.com>
To:     Christian Borntraeger <borntraeger@...ibm.com>
Cc:     Farhan Ali <alifm@...ux.vnet.ibm.com>,
        Thomas Huth <thuth@...hat.com>, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-fbdev@...r.kernel.org,
        geert@...ux-m68k.org, tomi.valkeinen@...com,
        b.zolnierkie@...sung.com
Subject: Re: [PATCH v3 1/3] Kconfig : Remove HAS_IOMEM dependency for
 Graphics support

On Wed, 21 Feb 2018 11:22:38 +0100
Christian Borntraeger <borntraeger@...ibm.com> wrote:

> On 02/21/2018 11:05 AM, Christian Borntraeger wrote:
> > 
> > 
> > On 02/19/2018 05:38 PM, Farhan Ali wrote:  
> >>
> >>
> >> On 02/19/2018 11:25 AM, Thomas Huth wrote:  
> >>> On 19.02.2018 16:47, 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>
> >>>> ---
> >>>>   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"  
> > 
> > 
> > Hmmm, looks like that this makes it impossible to select VIRTIO_GPU - need still more
> > work.
> >   
> Sorry my fault. I had CONFIG_PCI disabled.

That smells like the s390 HAS_IOMEM stuff needs more work -- I guess
that you want to enable a ccw virtio-gpu device, not a pci one, right?