Re: [PATCH 2/2] fbdev: Add support for the nomodeset kernel parameter

From
Thomas Zimmermann <tzimmermann@suse.de>
Date
2022-11-11 11:42:07
Also in
dri-devel
Reply to
Helge Deller, 2022-11-11
Hi

Am 11.11.22 um 11:49 schrieb Helge Deller:
On 11/11/22 10:49, Javier Martinez Canillas wrote:
quoted
On 11/8/22 09:16, Thomas Zimmermann wrote:
quoted
Hi
[...]
quoted
My proposal would be to add a little helper to fbdev that includes your
suggestions:

    bool fb_modesetting_disabled(const char *drvname)
    {
       fwonly = video_firmware_drivers_only()
       if (fbonly && drvname)
    pr_warn("")
       return fbonly;
    }
I'm still wondering why you can't simply merge it with what is printed in
  [1] https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_nomodeset.c#L18
I don't understand. That message is still there after moving the code around. It is always printed if the nomodeset parameter is given.

In addition to that, you get a per-driver warning for fbdev, so that it's clear which drivers are affected.

Best regards
Thomas
Other than that, your the proposal is okay, if you adjust your patches to
call this new function "fb_modesetting_disabled()" instead of
calling video_firmware_drivers_only() like this:
quoted
+    if (video_firmware_drivers_only())
+        return -ENODEV;
Helge
-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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