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Date:   Fri, 20 Nov 2020 03:37:39 -0500
From:   Peilin Ye <yepeilin.cs@gmail.com>
To:     Daniel Vetter <daniel@ffwll.ch>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        Linux Fbdev development list <linux-fbdev@vger.kernel.org>
Subject: Re: [PATCH v3 0/5] console: Miscellaneous clean-ups, do not use
 FNTCHARCNT() in fbcon.c
Message-ID: <20201120073245.GA24568@PWN>
References: <cover.1605169912.git.yepeilin.cs@gmail.com>
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 <20201114081021.GA11811@PWN>
 <X6/K/S9V7rj2hI5p@kroah.com>
 <X6/L/lE2pA7csBwd@kroah.com>
 <20201119083257.GA9468@PWN>
 <CAKMK7uF_AOrfTDVZwmxn_C-5sTBDu_v9KGH07wO5hTa98Z8Ucg@mail.gmail.com>
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On Thu, Nov 19, 2020 at 04:10:57PM +0100, Daniel Vetter wrote:
> On Thu, Nov 19, 2020 at 9:33 AM Peilin Ye <yepeilin.cs@gmail.com> wrote:
> > setfont seems to work fine, I tried Georgian-Fixed16 (256 chars) and
> > Uni2-VGA16 (512 chars) under /usr/share/consolefonts/ in my Ubuntu box,
> > including setting all consoles to the same font:
> >
> > for i in {1..6}; do
> >         sudo setfont -C /dev/tty${i} /usr/share/consolefonts/Georgian-Fixed16.psf.gz
> > done
> >
> > Font rotation also seems to work fine:
> >
> > for i in {1..4}; do
> >         echo $i | sudo tee /sys/class/graphics/fbcon/rotate
> >         sleep 1
> > done
> 
> Thanks a lot for checking all this.

Not a problem, watching my console rotating was fun :)

> > One last thing I can think of is tile blitting, but I don't have the
> > hardware (e.g. a Matrox G400 card, see FB_TILEBLITTING in
> > drivers/video/fbdev/Kconfig) at hand, nor did I figure out how to
> > simulate it after searching for a while.  However based on the other
> > tests above I believe vc->vc_font.charcount is set properly.
> 
> tbh I'll just go ahead and delete it if it's broken :-)
> 
> Userspace we have to keep working (and there's actually people
> creating new products on top of drm display drivers using fbdev
> emulation and /dev/fb/0 interface!), but kernel internal stuff like
> fbcon acceleration we can trim pretty aggressively I think.

Ah, I see, I'll leave it be, then.

Thanks,
Peilin Ye