Re: [PATCH] drm/i915/fbdev: fix link failure without FBDEV emulation

Thomas Zimmermann
2026-03-16T12:18:50Z

Hi

Am 04.03.26 um 09:43 schrieb Thomas Zimmermann:
> Hi
>
> Am 04.03.26 um 09:36 schrieb Arnd Bergmann:
>> From: Arnd Bergmann <arnd@arndb.de>
>>
>> If CONFIG_DRM_FBDEV_EMULATION is disabled but CONFIG_FRAMEBUFFER_CONSOLE
>> is turned on, the i915 driver now fails to link:
>>
>> ERROR: modpost: "intel_fbdev_fb_prefer_stolen"
>> [drivers/gpu/drm/i915/i915.ko] undefined!
>>
>> Fix the contition to include a check for the symbol that controls
>> compilation
>> of intel_fbdev_fb.c.
>>
>> Fixes: 94c7d2861292 ("drm/i915/fbdev: Extract
>> intel_fbdev_fb_prefer_stolen()")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>>   drivers/gpu/drm/i915/i915_initial_plane.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_initial_plane.c
>> b/drivers/gpu/drm/i915/i915_initial_plane.c
>> index 5594548f51d8..390a9248d631 100644
>> --- a/drivers/gpu/drm/i915/i915_initial_plane.c
>> +++ b/drivers/gpu/drm/i915/i915_initial_plane.c
>> @@ -115,7 +115,8 @@ initial_plane_vma(struct drm_i915_private *i915,
>>        * important and we should probably use that space with FBC or
>> other
>>        * features.
>>        */
>> -    if (IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
>> +    if (IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION) &&
>> +        IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
>
> It's possible to run fbdev without the console. So if I'm not
> mistaken, only CONFIG_DRM_FBDEV_EMULATION would be correct.

Did anyone pick up this fix?

Best regards
Thomas

>
> Best regards
> Thomas
>
>
>>           mem == i915->mm.stolen_region &&
>>           !intel_fbdev_fb_prefer_stolen(&i915->drm, size)) {
>>           drm_dbg_kms(&i915->drm, "Initial FB size exceeds half of
>> stolen, discarding\n");
>

--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)