linux-kernel - Re: [PATCH v1 1/2] drm/panel: jd9365da: Move the sending location of the 11/29 command

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Message-ID: <gq5fcttutomphgfrwrtloqzczia3uc5qpont3lrowocan2xjc5@ubfabhsh3mfl>
Date: Sat, 27 Jul 2024 19:59:29 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Zhaoxiong Lv <lvzhaoxiong@...qin.corp-partner.google.com>
Cc: neil.armstrong@...aro.org, quic_jesszhan@...cinc.com, 
	maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de, dianders@...omium.org, 
	hsinyi@...gle.com, airlied@...il.com, daniel@...ll.ch, jagan@...eble.ai, 
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] drm/panel: jd9365da: Move the sending location of
 the 11/29 command

On Thu, Jul 25, 2024 at 04:32:44PM GMT, Zhaoxiong Lv wrote:
> Move the 11/29 command from enable() to init() function
> 
> As mentioned in the patch:
> https://lore.kernel.org/all/20240624141926.5250-2-lvzhaoxiong@huaqin.corp-partner.google.com/
> 
> Our DSI host has different modes in prepare() and enable()
> functions. prepare() is in LP mode and enable() is in HS mode.
> Since the 11/29 command must also be sent in LP mode,
> so we also move 11/29 command to the init() function.
> 
> After moving the 11/29 command to the init() function,
> we no longer need additional delay judgment, so we delete
> variables "exit_sleep_to_display_on_delay_ms" and
> "display_on_delay_ms".

Won't this result in a garbage being displayed on the panel during
startup?

> 
> Signed-off-by: Zhaoxiong Lv <lvzhaoxiong@...qin.corp-partner.google.com>
> ---
>  .../gpu/drm/panel/panel-jadard-jd9365da-h3.c  | 59 ++++++++++---------
>  1 file changed, 32 insertions(+), 27 deletions(-)