[PATCH v4 0/3] console/fbcon: Add support for deferred console takeover
Daniel Vetter
daniel at ffwll.ch
Wed Jun 27 09:15:20 UTC 2018
On Tue, Jun 26, 2018 at 08:36:09PM +0200, Hans de Goede wrote:
> Hi All,
>
> Here is v4 of my patch-set, to delay fbcon taking over the console (and
> binding to fbdev devices) until there actually is some text output to the
> console. This is intended for use with the "quiet" cmdline option, in
> combination with a bootloader which leaves the vendor's logo /
> EFI bootgraphics put up by the firmware intact on the EFI framebuffer.
>
> The end goal here is a boot where the firmware shows its boot graphics
> and these stay in place for a couple of seconds until the GUI loads and
> the GUI then smoothly takes over the framebuffer without any distruptions.
>
> This patch-set spans 2 subsystems.
>
> Petr, the printk subsys change is really trivial (1 line addition) can we
> get your Acked-by for merging all 3 patches through the fbdev tree?
>
> Changelog:
>
> Changes in v4:
> -Keep the comments about which fbcon functions need locks in place
>
> Changes in v3:
> -Export is_console_locke() for use in modules (as fbcon may be built as a .ko)
> -Use WARN_CONSOLE_UNLOCKED() in several places in the fbcon code to assert
> proper locking (requested by Daniel)
> -Unregister the fbcon-dummycon-output-notifier on fbcon_exit() (req. by Daniel)
> -Document the fbcon=nodefer commandline option (req. by Emil)
>
> Changes in v2:
> -Check the whole string when checking for erases in putcs, instead of just
> the first char
> -Make dummycon_blank return 1, so that a redraw gets triggered and any text
> rendered while blanked gets output so that it can trigger a deferred
> takeover if one is pending
Wrt merging I think it'd be best if we stuff this into drm-misc-next -
that will increase testing by gpu drivers a lot, instead of a suprise when
the fbdev pull lands in upstream.
Bart, is that ok with you?
Hans, if Bart acks this you can directly push this imo.
-Daniel
>
> Regards,
>
> Hans
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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