linux-kernel - Re: [PATCH v3 0/5] console: Miscellaneous clean-ups, do not use FNTCHARCNT() in fbcon.c

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Message-ID: <20201113211633.GY401619@phenom.ffwll.local>
Date:   Fri, 13 Nov 2020 22:16:33 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     Peilin Ye <yepeilin.cs@...il.com>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org
Subject: Re: [PATCH v3 0/5] console: Miscellaneous clean-ups, do not use
 FNTCHARCNT() in fbcon.c

On Thu, Nov 12, 2020 at 07:02:21AM -0500, Peilin Ye wrote:
> Hi all,
> 
> This is a collection of some miscellaneous clean-ups for fbcon and some
> console drivers. Since v2, I rebased them on linux-next, added some
> Reviewed-by: tags from Daniel and Greg, and rewrote the commit messages as
> suggested by Jiri. See [1] for v2 links.
> 
> It does the following:
> 
>   - Garbage collect KD_FONT_OP_COPY callbacks since we disabled it
>     recently. Mark it as obsolete.
>   - Delete dummy con_font_op() callbacks. (Reviewed by Greg)
> 
>   - Add a charcount field to our new font descriptor, `struct font_desc`.
>     (Reviewed by Daniel)
>   - Do not use a hard-coded 256 for built-in font charcount in
>     console/sticore.c, use the new charcount field of `struct font_desc`
>     instead. (Reviewed by Daniel)
>   - Similarly, in fbcon.c, avoid using the magic negative-indexing macro,
>     FNTCHARCNT(). Set `vc->vc_font.charcount` properly and always use that
>     instead.
> 
> Daniel, hopefully [5/5] removes FNTCHARCNT() for ever, but I have not
> tested it sufficiently yet. I remember you mentioned elsewhere that
> "fbtest.c" is insufficient for framebuffer testing, then how should we
> test it? The first 4 patches should be fine.
> 
> Please reference commit messages for more information. Thank you!
> 
> [1] v2 links:
> 
> 2/5: https://lore.kernel.org/lkml/c5563eeea36aae7bd72ea2e985bc610d585ece40.1604306433.git.yepeilin.cs@gmail.com/
> 3/5: https://lore.kernel.org/lkml/20201028060533.1206307-1-yepeilin.cs@gmail.com/
> 4/5: https://lore.kernel.org/lkml/c38042bbf5c9777c84900d56c09f3c156b32af48.1603788512.git.yepeilin.cs@gmail.com/
> 5/5: https://lore.kernel.org/lkml/20201028155139.1220549-1-yepeilin.cs@gmail.com/
> 
> Peilin Ye (5):
>   console: Delete unused con_font_copy() callback implementations
>   console: Delete dummy con_font_set() and con_font_default() callback implementations
>   Fonts: Add charcount field to font_desc
>   parisc/sticore: Avoid hard-coding built-in font charcount
>   fbcon: Avoid using FNTCHARCNT() and hard-coded built-in font charcount

Patches all look good to me, if Greg is ok with me applying the entire
pile to drm-misc-next I'll do that next week.

Thanks, Daniel

> 
>  drivers/usb/misc/sisusbvga/sisusb_con.c | 21 --------
>  drivers/video/console/dummycon.c        | 20 --------
>  drivers/video/console/sticore.c         |  8 +--
>  drivers/video/fbdev/core/fbcon.c        | 68 ++++++++-----------------
>  drivers/video/fbdev/core/fbcon_rotate.c |  3 +-
>  drivers/video/fbdev/core/tileblit.c     |  4 +-
>  include/linux/console.h                 |  1 -
>  include/linux/font.h                    |  1 +
>  include/uapi/linux/kd.h                 |  2 +-
>  lib/fonts/font_10x18.c                  |  1 +
>  lib/fonts/font_6x10.c                   |  1 +
>  lib/fonts/font_6x11.c                   |  1 +
>  lib/fonts/font_6x8.c                    |  1 +
>  lib/fonts/font_7x14.c                   |  1 +
>  lib/fonts/font_8x16.c                   |  1 +
>  lib/fonts/font_8x8.c                    |  1 +
>  lib/fonts/font_acorn_8x8.c              |  1 +
>  lib/fonts/font_mini_4x6.c               |  1 +
>  lib/fonts/font_pearl_8x8.c              |  1 +
>  lib/fonts/font_sun12x22.c               |  1 +
>  lib/fonts/font_sun8x16.c                |  1 +
>  lib/fonts/font_ter16x32.c               |  1 +
>  22 files changed, 42 insertions(+), 99 deletions(-)
> 
> -- 
> 2.25.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch