Re: [PATCH 0/3] sysfb: Fix display output on Lenovo D330 (and others)

[Thomas Zimmermann <tzimmermann@suse.de>]

Hi Ard

Am 27.08.26 um 18:56 schrieb Ard Biesheuvel:
> Hello Thomas,
>
> On Thu, 27 Aug 2026, at 16:01, Thomas Zimmermann wrote:
>> The kernel mis-interprets the display geometry given by the Lenovo
>> D330 as incorrect. The values are correct, but the display output
>> is rotated by 90°. With the kernel's firmware quirk applied the output
>> is garbled.
>>
>> Remove the firmware quirk for the Lenovo D330 and let DRM's sysfb
>> drivers set the correct panel orientation instead. To make this work
>> for any display mode, use the panel size for looking up the correct
>> orientation.
>>
>> Tested on a Lenovo D330-10IGM IdeaPad.
>>
>> Thomas Zimmermann (3):
>>    drm/edid: Add drm_edid_get_preferred_size()
>>    drm/sysfb: Use preferred panel size for panel orientation quirks
>>    firmware/sysfb: Remove rotation quirk for Lenovo D330
>>
> Acked-by: Ard Biesheuvel <ardb@kernel.org>

The Sashiko bot warns that the quirk is required on the device's older 
UEFI firmware revisions.  I can confirm that the quirk breaks display 
output for the latest firmware (ver 8NCN43WW).  How is this usually 
being handled? Can I expect affected users to update their firmware?

Best regards
Thomas


-- 
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Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
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