linux-kernel - Re: [PATCH 0/5] drm/panel: panel-simple: Fix panel-dpi probe error

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Message-ID: <20250626-ambrosial-soft-puma-c5bfeb@houat>
Date: Thu, 26 Jun 2025 11:35:07 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Luca Ceresoli <luca.ceresoli@...tlin.com>, 
	Anusha Srivatsa <asrivats@...hat.com>, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5] drm/panel: panel-simple: Fix panel-dpi probe error

Hi Francesco,

On Thu, Jun 26, 2025 at 11:25:24AM +0200, Francesco Dolcini wrote:
> Hello Maxime,
> thanks for the patch
> 
> On Wed, Jun 25, 2025 at 08:48:37AM +0200, Maxime Ripard wrote:
> > Here's a series fixing (hopefully) the panel-simple regression for
> > panels with a panel-dpi compatible.
> > 
> > It's only build tested, so if you could give that series a try
> > Francesco, I'd really appreciate it.
> 
> It does not build for me, applied on top of commit ee88bddf7f2f ("Merge tag
> 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf")
> 
>   SYNC    include/config/auto.conf.cmd
>   CALL    scripts/checksyscalls.sh
>   CC      drivers/gpu/drm/drm_of.o
>   CC [M]  drivers/gpu/drm/panel/panel-simple.o
>   AR      drivers/gpu/drm/built-in.a
>   AR      drivers/gpu/built-in.a
>   AR      drivers/built-in.a
>   AR      built-in.a
>   AR      vmlinux.a
>   LD      vmlinux.o
>   OBJCOPY modules.builtin.modinfo
>   GEN     modules.builtin
>   GEN     .vmlinux.objs
>   MODPOST Module.symvers
> ERROR: modpost: "mipi_dsi_bus_type" [drivers/gpu/drm/panel/panel-simple.ko] undefined!
> make[2]: *** [scripts/Makefile.modpost:147: Module.symvers] Error 1
> make[1]: *** [/home/francesco/Toradex/sources/linux/Makefile:1953: modpost] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
> [Exit 2]

Thanks for giving it a try. Can you share the defconfig you've been using?

Maxime

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