linux-kernel - Re: [PATCH 8/8] drm/panel: himax-hx83102: use wrapped MIPI DCS functions

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Date: Mon, 20 May 2024 01:28:11 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Douglas Anderson <dianders@...omium.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.org>, 
	Linus Walleij <linus.walleij@...aro.org>, Daniel Vetter <daniel@...ll.ch>, 
	David Airlie <airlied@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/8] drm/panel: himax-hx83102: use wrapped MIPI DCS
 functions

On Fri, May 17, 2024 at 02:36:43PM -0700, Douglas Anderson wrote:
> Take advantage of some of the new wrapped routines introduced by
> commit f79d6d28d8fe ("drm/mipi-dsi: wrap more functions for streamline
> handling") to simplify the himax-hx83102 driver a bit more. This gets
> rid of some extra error prints (since the _multi functions all print
> errors for you) and simplifies the code a bit.
> 
> One thing here that isn't just refactoring is that in a few places we
> now check with errors with "if (err)" instead of "if (err < 0)". All
> errors are expected to be negative so this is not expected to have any
> impact. The _multi code internally considers anything non-zero to be
> an error so this just makes things consistent.
> 
> It can also be noted that hx83102_prepare() has a mix of things that
> can take advantage of _multi calls and things that can't. The cleanest
> seemed to be to use the multi_ctx still but consistently use the
> "accum_err" variable for error returns, though that's definitely a
> style decision with pros and cons.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
>  drivers/gpu/drm/panel/panel-himax-hx83102.c | 92 +++++++--------------
>  1 file changed, 28 insertions(+), 64 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry