Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
When the latter symbol is =m, kconfig downgrades (limits) the 'select's
under FB_OF to modular (=m). This causes undefined symbol references:
powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58): undefined reference to `cfb_fillrect'
powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60): undefined reference to `cfb_copyarea'
powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68): undefined reference to `cfb_imageblit'
Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
selected FB_CFB_* symbols will become =y instead of =m.
In tristate logic (for DRM_OFDRM), this changes the dependency from
!DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
to (boolean)
DRM_OFDRM != y == y, allowing the 'select's to cause the
FB_CFB_* symbols to =y instead of =m.
Fixes: c8a17756c425 ("drm/ofdrm: Add ofdrm for Open Firmware framebuffers")
Signed-off-by: Randy Dunlap <[email protected]>
Suggested-by: Masahiro Yamada <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: Michal Suchánek <[email protected]>
Cc: [email protected]
Cc: Daniel Vetter <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
drivers/video/fbdev/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -455,7 +455,7 @@ config FB_ATARI
config FB_OF
bool "Open Firmware frame buffer device support"
depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
- depends on !DRM_OFDRM
+ depends on DRM_OFDRM != y
select APERTURE_HELPERS
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
Am 23.11.22 um 04:16 schrieb Randy Dunlap:
> Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
> When the latter symbol is =m, kconfig downgrades (limits) the 'select's
> under FB_OF to modular (=m). This causes undefined symbol references:
>
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58): undefined reference to `cfb_fillrect'
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60): undefined reference to `cfb_copyarea'
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68): undefined reference to `cfb_imageblit'
>
> Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
> selected FB_CFB_* symbols will become =y instead of =m.
>
> In tristate logic (for DRM_OFDRM), this changes the dependency from
> !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
> to (boolean)
> DRM_OFDRM != y == y, allowing the 'select's to cause the
> FB_CFB_* symbols to =y instead of =m.
>
> Fixes: c8a17756c425 ("drm/ofdrm: Add ofdrm for Open Firmware framebuffers")
> Signed-off-by: Randy Dunlap <[email protected]>
> Suggested-by: Masahiro Yamada <[email protected]>
> Cc: Thomas Zimmermann <[email protected]>
> Cc: Michal Suchánek <[email protected]>
> Cc: [email protected]
> Cc: Daniel Vetter <[email protected]>
> Cc: Helge Deller <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
Acked-by: Thomas Zimmermann <[email protected]>
> ---
> drivers/video/fbdev/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -455,7 +455,7 @@ config FB_ATARI
> config FB_OF
> bool "Open Firmware frame buffer device support"
> depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
> - depends on !DRM_OFDRM
> + depends on DRM_OFDRM != y
> select APERTURE_HELPERS
> select FB_CFB_FILLRECT
> select FB_CFB_COPYAREA
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
On Wed, Nov 23, 2022, at 04:16, Randy Dunlap wrote:
> Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
> When the latter symbol is =m, kconfig downgrades (limits) the 'select's
> under FB_OF to modular (=m). This causes undefined symbol references:
>
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58):
> undefined reference to `cfb_fillrect'
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60):
> undefined reference to `cfb_copyarea'
> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68):
> undefined reference to `cfb_imageblit'
>
> Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
> selected FB_CFB_* symbols will become =y instead of =m.
>
> In tristate logic (for DRM_OFDRM), this changes the dependency from
> !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
> to (boolean)
> DRM_OFDRM != y == y, allowing the 'select's to cause the
> FB_CFB_* symbols to =y instead of =m.
>
Is it actually a useful configuration to have OFDRM=m and
FB_OF=y though? I would expect in that case that the OFDRM
driver never binds to a device because it's already owned
by FB_OF.
> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> --- a/drivers/video/fbdev/Kconfig
> +++ b/drivers/video/fbdev/Kconfig
> @@ -455,7 +455,7 @@ config FB_ATARI
> config FB_OF
> bool "Open Firmware frame buffer device support"
> depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
> - depends on !DRM_OFDRM
> + depends on DRM_OFDRM != y
> select APERTURE_HELPERS
I would instead make this 'depends on DRM_OFDRM=n', which
completely eliminates configs that have both driver enabled.
A nicer change would be to make FB_OF a tristate symbol,
which makes it possible to load one of the two modules if
both are enabled =m, while only allowing one of them to
be =y if the other is completely disabled. It looks like
offb was originally written to be usable as a loadable module,
but Kconfig has prevented this since at least the start of
the git history.
Arnd
Hi
Am 23.11.22 um 11:02 schrieb Randy Dunlap:
> Hi Arnd,
>
> On 11/23/22 01:08, Arnd Bergmann wrote:
>> On Wed, Nov 23, 2022, at 04:16, Randy Dunlap wrote:
>>> Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
>>> When the latter symbol is =m, kconfig downgrades (limits) the 'select's
>>> under FB_OF to modular (=m). This causes undefined symbol references:
>>>
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58):
>>> undefined reference to `cfb_fillrect'
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60):
>>> undefined reference to `cfb_copyarea'
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68):
>>> undefined reference to `cfb_imageblit'
>>>
>>> Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
>>> selected FB_CFB_* symbols will become =y instead of =m.
>>>
>>> In tristate logic (for DRM_OFDRM), this changes the dependency from
>>> !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
>>> to (boolean)
>>> DRM_OFDRM != y == y, allowing the 'select's to cause the
>>> FB_CFB_* symbols to =y instead of =m.
>>>
>>
>> Is it actually a useful configuration to have OFDRM=m and
>> FB_OF=y though? I would expect in that case that the OFDRM
>> driver never binds to a device because it's already owned
>> by FB_OF.
>>
>>> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
>>> --- a/drivers/video/fbdev/Kconfig
>>> +++ b/drivers/video/fbdev/Kconfig
>>> @@ -455,7 +455,7 @@ config FB_ATARI
>>> config FB_OF
>>> bool "Open Firmware frame buffer device support"
>>> depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
>>> - depends on !DRM_OFDRM
>>> + depends on DRM_OFDRM != y
>>> select APERTURE_HELPERS
>>
>> I would instead make this 'depends on DRM_OFDRM=n', which
>> completely eliminates configs that have both driver enabled.
>
> Yep, that works for me. Thanks.
>
> Thomas, Michal, are you OK with that change?
Yes.
>
>> A nicer change would be to make FB_OF a tristate symbol,
>> which makes it possible to load one of the two modules if
>> both are enabled =m, while only allowing one of them to
>> be =y if the other is completely disabled. It looks like
>> offb was originally written to be usable as a loadable module,
>> but Kconfig has prevented this since at least the start of
>> the git history.
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
On Wed, Nov 23, 2022 at 09:02:54AM +0100, Thomas Zimmermann wrote:
>
> Am 23.11.22 um 04:16 schrieb Randy Dunlap:
> > Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
> > When the latter symbol is =m, kconfig downgrades (limits) the 'select's
> > under FB_OF to modular (=m). This causes undefined symbol references:
> >
> > powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58): undefined reference to `cfb_fillrect'
> > powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60): undefined reference to `cfb_copyarea'
> > powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68): undefined reference to `cfb_imageblit'
> >
> > Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
> > selected FB_CFB_* symbols will become =y instead of =m.
> >
> > In tristate logic (for DRM_OFDRM), this changes the dependency from
> > !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
> > to (boolean)
> > DRM_OFDRM != y == y, allowing the 'select's to cause the
> > FB_CFB_* symbols to =y instead of =m.
> >
> > Fixes: c8a17756c425 ("drm/ofdrm: Add ofdrm for Open Firmware framebuffers")
> > Signed-off-by: Randy Dunlap <[email protected]>
> > Suggested-by: Masahiro Yamada <[email protected]>
> > Cc: Thomas Zimmermann <[email protected]>
> > Cc: Michal Such?nek <[email protected]>
> > Cc: [email protected]
> > Cc: Daniel Vetter <[email protected]>
> > Cc: Helge Deller <[email protected]>
> > Cc: [email protected]
> > Cc: [email protected]
>
> Acked-by: Thomas Zimmermann <[email protected]>
Tested-by: Michal Such?nek <[email protected]>
>
> > ---
> > drivers/video/fbdev/Kconfig | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
> > --- a/drivers/video/fbdev/Kconfig
> > +++ b/drivers/video/fbdev/Kconfig
> > @@ -455,7 +455,7 @@ config FB_ATARI
> > config FB_OF
> > bool "Open Firmware frame buffer device support"
> > depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
> > - depends on !DRM_OFDRM
> > + depends on DRM_OFDRM != y
> > select APERTURE_HELPERS
> > select FB_CFB_FILLRECT
> > select FB_CFB_COPYAREA
>
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 N?rnberg, Germany
> (HRB 36809, AG N?rnberg)
> Gesch?ftsf?hrer: Ivo Totev
Hi Arnd,
On 11/23/22 01:08, Arnd Bergmann wrote:
> On Wed, Nov 23, 2022, at 04:16, Randy Dunlap wrote:
>> Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
>> When the latter symbol is =m, kconfig downgrades (limits) the 'select's
>> under FB_OF to modular (=m). This causes undefined symbol references:
>>
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58):
>> undefined reference to `cfb_fillrect'
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60):
>> undefined reference to `cfb_copyarea'
>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68):
>> undefined reference to `cfb_imageblit'
>>
>> Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
>> selected FB_CFB_* symbols will become =y instead of =m.
>>
>> In tristate logic (for DRM_OFDRM), this changes the dependency from
>> !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
>> to (boolean)
>> DRM_OFDRM != y == y, allowing the 'select's to cause the
>> FB_CFB_* symbols to =y instead of =m.
>>
>
> Is it actually a useful configuration to have OFDRM=m and
> FB_OF=y though? I would expect in that case that the OFDRM
> driver never binds to a device because it's already owned
> by FB_OF.
>
>> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
>> --- a/drivers/video/fbdev/Kconfig
>> +++ b/drivers/video/fbdev/Kconfig
>> @@ -455,7 +455,7 @@ config FB_ATARI
>> config FB_OF
>> bool "Open Firmware frame buffer device support"
>> depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
>> - depends on !DRM_OFDRM
>> + depends on DRM_OFDRM != y
>> select APERTURE_HELPERS
>
> I would instead make this 'depends on DRM_OFDRM=n', which
> completely eliminates configs that have both driver enabled.
Yep, that works for me. Thanks.
Thomas, Michal, are you OK with that change?
> A nicer change would be to make FB_OF a tristate symbol,
> which makes it possible to load one of the two modules if
> both are enabled =m, while only allowing one of them to
> be =y if the other is completely disabled. It looks like
> offb was originally written to be usable as a loadable module,
> but Kconfig has prevented this since at least the start of
> the git history.
--
~Randy
On 11/23/22 02:02, Randy Dunlap wrote:
> Hi Arnd,
>
> On 11/23/22 01:08, Arnd Bergmann wrote:
>> On Wed, Nov 23, 2022, at 04:16, Randy Dunlap wrote:
>>> Fix build when CONFIG_FB_OF=y and CONFIG_DRM_OFDRM=m.
>>> When the latter symbol is =m, kconfig downgrades (limits) the 'select's
>>> under FB_OF to modular (=m). This causes undefined symbol references:
>>>
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x58):
>>> undefined reference to `cfb_fillrect'
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x60):
>>> undefined reference to `cfb_copyarea'
>>> powerpc64-linux-ld: drivers/video/fbdev/offb.o:(.data.rel.ro+0x68):
>>> undefined reference to `cfb_imageblit'
>>>
>>> Fix this by allowing FB_OF any time that DRM_OFDRM != y so that the
>>> selected FB_CFB_* symbols will become =y instead of =m.
>>>
>>> In tristate logic (for DRM_OFDRM), this changes the dependency from
>>> !DRM_OFDRM == 2 - 1 == 1 => modular only (or disabled)
>>> to (boolean)
>>> DRM_OFDRM != y == y, allowing the 'select's to cause the
>>> FB_CFB_* symbols to =y instead of =m.
>>>
>>
>> Is it actually a useful configuration to have OFDRM=m and
>> FB_OF=y though? I would expect in that case that the OFDRM
>> driver never binds to a device because it's already owned
>> by FB_OF.
>>
>>> diff -- a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
>>> --- a/drivers/video/fbdev/Kconfig
>>> +++ b/drivers/video/fbdev/Kconfig
>>> @@ -455,7 +455,7 @@ config FB_ATARI
>>> config FB_OF
>>> bool "Open Firmware frame buffer device support"
>>> depends on (FB = y) && PPC && (!PPC_PSERIES || PCI)
>>> - depends on !DRM_OFDRM
>>> + depends on DRM_OFDRM != y
>>> select APERTURE_HELPERS
>>
>> I would instead make this 'depends on DRM_OFDRM=n', which
>> completely eliminates configs that have both driver enabled.
>
> Yep, that works for me. Thanks.
>
> Thomas, Michal, are you OK with that change?
>
>> A nicer change would be to make FB_OF a tristate symbol,
>> which makes it possible to load one of the two modules if
>> both are enabled =m, while only allowing one of them to
>> be =y if the other is completely disabled. It looks like
>> offb was originally written to be usable as a loadable module,
>> but Kconfig has prevented this since at least the start of
>> the git history.
ISTM that a distro would prefer to have both DFM_OFDRM and
FB_OF as tristate symbols that could both be built as loadable
modules, as Arnd describes above.
I'll look into that.
--
~Randy