From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [PATCH V7 2/2] drm/panel: Add Sitronix ST7701 panel driver
Date: Sat, 12 Jan 2019 17:53:31 +0100
Message-ID: <20190112165331.GA30019@ravnborg.org>
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To: Jagan Teki <jagan@amarulasolutions.com>
Cc: David Airlie <airlied@linux.ie>, Sean Paul <sean@poorly.run>, linux-kernel <linux-kernel@vger.kernel.org>, dri-devel <dri-devel@lists.freedesktop.org>, Thierry Reding <thierry.reding@gmail.com>, Michael Trimarchi <michael@amarulasolutions.com>, linux-amarula@amarulasolutions.com
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Hi Jagan.

> When did .unprepare and .disable are actually called? I turn-off the
> backlight by echo 1 > /sys/class/backlight/backlight/bl_power and even
> power of the board I assume the video transmission stop so it would
> ended-up calling these, but I couldn't see prints. does it the same
> time uart dead or something? do you have any inputs on sanity testing
> of typical panels, if yes please share.

Sorry, I do not rememebr the details to help you here.
Maybe module unload and then manipulating the panel in /sys/ would
do the trick.

	Sam