linux-kernel - Re: [PATCH V7 2/2] drm/panel: Add Sitronix ST7701 panel driver

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Date:   Sat, 12 Jan 2019 17:53:31 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     David Airlie <airlied@...ux.ie>, Sean Paul <sean@...rly.run>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        linux-amarula@...rulasolutions.com
Subject: Re: [PATCH V7 2/2] drm/panel: Add Sitronix ST7701 panel driver

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