Re: FAILED: patch "[PATCH] drm/tiny: panel-mipi-dbi: Use drm_client_setup_with_fourcc()" failed to apply to 6.12-stable tree

["Fabio Estevam" <festevam@denx.de>]

Hi Greg and Thomas,

On Monday, May 19, 2025 09:00 -03, <gregkh@linuxfoundation.org> wrote:

> 
> The patch below does not apply to the 6.12-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.
> 
> To reproduce the conflict and resubmit, you may use the following commands:
> 
> git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
> git checkout FETCH_HEAD
> git cherry-pick -x 9c1798259b9420f38f1fa1b83e3d864c3eb1a83e
> # <resolve conflicts, build, test, etc.>
> git commit -s
> git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025051936-qualify-waged-4677@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..

Locally,  I am running 6.12 with these two extra dependencies applied:

commit 8998eedda2539d2528cfebdc7c17eed0ad35b714
Author: Thomas Zimmermann <tzimmermann@suse.de>
Date:   Tue Sep 24 09:12:03 2024 +0200

    drm/fbdev-dma: Support struct drm_driver.fbdev_probe
    
    Rework fbdev probing to support fbdev_probe in struct drm_driver
    and reimplement the old fb_probe callback on top of it. Provide an
    initializer macro for struct drm_driver that sets the callback
    according to the kernel configuration.
    
    This change allows the common fbdev client to run on top of DMA-
    based DRM drivers.
    
    Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
    Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-6-tzimmermann@suse.de


commit 1b0caa5f5ac20bcaf82fc89a5c849b21ce3bfdf6
Author: Thomas Zimmermann <tzimmermann@suse.de>
Date:   Tue Sep 24 09:12:29 2024 +0200

    drm/panel-mipi-dbi: Run DRM default client setup
    
    Call drm_client_setup() to run the kernel's default client setup
    for DRM. Set fbdev_probe in struct drm_driver, so that the client
    setup can start the common fbdev client.
    
    v5:
    - select DRM_CLIENT_SELECTION
    
    Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
    Cc: "Noralf Trønnes" <noralf@tronnes.org>
    Acked-by: Noralf Trønnes <noralf@tronnes.org>
    Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-32-tzimmermann@suse.de

I have only tested panel-mipi-dbi (the only display available on the board I use). I am unsure if applying these extra patches to linux-6.12 stable is safe or if they could cause issues with other fbdev drivers.

Regards,

Fabio Estevam