2023-08-04 14:13:39

by Javier Martinez Canillas

[permalink] [raw]
Subject: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION

The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
to an effective 'select FB_CORE', so any config that previously had DRM=y
and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.

This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
as reported by Arthur Grillo, e.g:

WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
Selected by [y]:
- DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]

Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
be to enable DRM fbdev emulation but without a framebuffer console.

Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
Reported-by: Arthur Grillo <[email protected]>
Closes: https://lore.kernel.org/dri-devel/[email protected]
Suggested-by: Arnd Bergmann <[email protected]>
Signed-off-by: Javier Martinez Canillas <[email protected]>
---

drivers/gpu/drm/Kconfig | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index b51c6a141dfa..2a44b9419d4d 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -135,7 +135,6 @@ config DRM_DEBUG_MODESET_LOCK
config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
depends on DRM
- select FRAMEBUFFER_CONSOLE if !EXPERT
select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
default y
help
--
2.41.0



2023-08-04 17:52:13

by Arthur Grillo

[permalink] [raw]
Subject: Re: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION



On 04/08/23 09:51, Javier Martinez Canillas wrote:
> The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
> emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
> to an effective 'select FB_CORE', so any config that previously had DRM=y
> and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.
>
> This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
> as reported by Arthur Grillo, e.g:
>
> WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
> Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
> Selected by [y]:
> - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]
>
> Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
> DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
> be to enable DRM fbdev emulation but without a framebuffer console.
>
> Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
> Reported-by: Arthur Grillo <[email protected]>
> Closes: https://lore.kernel.org/dri-devel/[email protected]
> Suggested-by: Arnd Bergmann <[email protected]>
> Signed-off-by: Javier Martinez Canillas <[email protected]>
> ---

Greate patch! I was about to send the same one XD.

Reviewed-by: Arthur Grillo <[email protected]>

Best Regards,
~Arthur Grillo

>
> drivers/gpu/drm/Kconfig | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index b51c6a141dfa..2a44b9419d4d 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -135,7 +135,6 @@ config DRM_DEBUG_MODESET_LOCK
> config DRM_FBDEV_EMULATION
> bool "Enable legacy fbdev support for your modesetting driver"
> depends on DRM
> - select FRAMEBUFFER_CONSOLE if !EXPERT
> select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
> default y
> help

2023-08-04 17:58:37

by Javier Martinez Canillas

[permalink] [raw]
Subject: Re: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION

Arthur Grillo <[email protected]> writes:

> On 04/08/23 09:51, Javier Martinez Canillas wrote:
>> The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
>> emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
>> to an effective 'select FB_CORE', so any config that previously had DRM=y
>> and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.
>>
>> This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
>> as reported by Arthur Grillo, e.g:
>>
>> WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
>> Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
>> Selected by [y]:
>> - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]
>>
>> Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
>> DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
>> be to enable DRM fbdev emulation but without a framebuffer console.
>>
>> Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
>> Reported-by: Arthur Grillo <[email protected]>
>> Closes: https://lore.kernel.org/dri-devel/[email protected]
>> Suggested-by: Arnd Bergmann <[email protected]>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>> ---
>
> Greate patch! I was about to send the same one XD.
>
> Reviewed-by: Arthur Grillo <[email protected]>
>

Pushed to drm-misc (drm-misc-next). Thanks!

--
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat


2023-08-04 20:20:24

by Randy Dunlap

[permalink] [raw]
Subject: Re: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION



On 8/4/23 05:51, Javier Martinez Canillas wrote:
> The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
> emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
> to an effective 'select FB_CORE', so any config that previously had DRM=y
> and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.
>
> This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
> as reported by Arthur Grillo, e.g:
>
> WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
> Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
> Selected by [y]:
> - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]
>
> Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
> DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
> be to enable DRM fbdev emulation but without a framebuffer console.
>
> Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
> Reported-by: Arthur Grillo <[email protected]>
> Closes: https://lore.kernel.org/dri-devel/[email protected]
> Suggested-by: Arnd Bergmann <[email protected]>
> Signed-off-by: Javier Martinez Canillas <[email protected]>

Acked-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]> # build-tested

Thanks.

> ---
>
> drivers/gpu/drm/Kconfig | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index b51c6a141dfa..2a44b9419d4d 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -135,7 +135,6 @@ config DRM_DEBUG_MODESET_LOCK
> config DRM_FBDEV_EMULATION
> bool "Enable legacy fbdev support for your modesetting driver"
> depends on DRM
> - select FRAMEBUFFER_CONSOLE if !EXPERT
> select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
> default y
> help

--
~Randy

2023-08-04 23:54:19

by Javier Martinez Canillas

[permalink] [raw]
Subject: Re: [PATCH] drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION

Randy Dunlap <[email protected]> writes:

Hello Randy,

> On 8/4/23 05:51, Javier Martinez Canillas wrote:
>> The commit c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev
>> emulation is enabled") changed DRM_FBDEV_EMULATION from 'depends on FB'
>> to an effective 'select FB_CORE', so any config that previously had DRM=y
>> and FB=n now has FB_CORE=y and FRAMEBUFFER_CONSOLE=y.
>>
>> This leads to unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
>> as reported by Arthur Grillo, e.g:
>>
>> WARNING: unmet direct dependencies detected for FRAMEBUFFER_CONSOLE
>> Depends on [n]: VT [=n] && FB_CORE [=y] && !UML [=y]
>> Selected by [y]:
>> - DRM_FBDEV_EMULATION [=y] && HAS_IOMEM [=y] && DRM [=y] && !EXPERT [=n]
>>
>> Arnd Bergmann suggests to drop the select FRAMEBUFFER_CONSOLE for the
>> DRM_FBDEV_EMULATION Kconfig symbol, since a possible use case could
>> be to enable DRM fbdev emulation but without a framebuffer console.
>>
>> Fixes: c242f48433e7 ("drm: Make FB_CORE to be selected if DRM fbdev emulation is enabled")
>> Reported-by: Arthur Grillo <[email protected]>
>> Closes: https://lore.kernel.org/dri-devel/[email protected]
>> Suggested-by: Arnd Bergmann <[email protected]>
>> Signed-off-by: Javier Martinez Canillas <[email protected]>
>
> Acked-by: Randy Dunlap <[email protected]>
> Tested-by: Randy Dunlap <[email protected]> # build-tested
>

I have already pushed this patch so I won't be able to add these tags but
thanks a lot for testing and confirming that the patch fixes your issue!

> Thanks.
>
>

--
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat