linux-kernel - Re: [PATCH v3 8/9] drm/panel: ili9882t: Don't use a table for initting panels

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Date: Mon, 6 May 2024 08:19:15 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Douglas Anderson <dianders@...omium.org>
Cc: dri-devel@...ts.freedesktop.org, Jani Nikula <jani.nikula@...ux.intel.com>, 
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
	Cong Yang <yangcong5@...qin.corp-partner.google.com>, Hsin-Yi Wang <hsinyi@...gle.com>, 
	Brian Norris <briannorris@...omium.org>, Sam Ravnborg <sam@...nborg.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Javier Martinez Canillas <javierm@...hat.com>, 
	Joel Selvaraj <jo@...amily.in>, lvzhaoxiong@...qin.corp-partner.google.com, 
	Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...il.com>, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 8/9] drm/panel: ili9882t: Don't use a table for
 initting panels

On Wed, May 1, 2024 at 5:43 PM Douglas Anderson <dianders@...omium.org> wrote:

> Consensus on the mailing lists is that panels shouldn't use a table of
> init commands but should instead use init functions. With the recently
> introduced mipi_dsi_dcs_write_seq_multi() this is not only clean/easy
> but also saves space. Measuring before/after this change:
>
> $ scripts/bloat-o-meter \
>   .../before/panel-ilitek-ili9882t.ko \
>   .../after/panel-ilitek-ili9882t.ko
> add/remove: 3/2 grow/shrink: 0/2 up/down: 6834/-8177 (-1343)
> Function                                     old     new   delta
> starry_ili9882t_init                           -    6152   +6152
> starry_ili9882t_init.d                         -     678    +678
> ili9882t_disable.d                             -       4      +4
> ili9882t_disable                             260     228     -32
> ili9882t_prepare                             540     396    -144
> .compoundliteral                             681       -    -681
> starry_ili9882t_init_cmd                    7320       -   -7320
> Total: Before=11928, After=10585, chg -11.26%
>
> Let's do the conversion.
>
> Since we're touching all the tables, let's also convert hex numbers to
> lower case as per kernel conventions.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Thanks for doing this Doug, everything is starting to look much
better after this series, and I hope we can keep Chromium display
drivers looking this good going forward.

Yours,
Linus Walleij