linux-kernel - Re: [PATCHv6 4/4] drm/omap: add support for manually updated displays

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Date:   Wed, 22 May 2019 20:21:52 +0200
From:   Pavel Machek <pavel@....cz>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Sebastian Reichel <sre@...nel.org>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        "H. Nikolaus Schaller" <hns@...delico.com>,
        dri-devel@...ts.freedesktop.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCHv6 4/4] drm/omap: add support for manually updated displays

On Wed 2019-04-03 17:11:09, Tony Lindgren wrote:
> * Sebastian Reichel <sebastian.reichel@...labora.com> [190403 20:14]:
> > This adds the required infrastructure for manually updated displays,
> > such as DSI command mode panels. While those panels often support
> > partial updates we currently always do a full refresh.
> > 
> > The display will be refreshed when something calls the dirty callback,
> > such as libdrm's drmModeDirtyFB(). This is currently being done at least
> > by the kernel console and Xorg (with modesetting driver) in their
> > default configuration. Weston does not implement this and the fbdev
> > backend does not work (display will not update). Weston's DRM backend
> > uses double buffering and the page flip will also trigger a display
> > refresh.
> 
> I've tested this with Linux next and the latest lm3532
> patches and it works fine as long as we leave out the
> backlight = <&lcd_backlight> entry from dts like I
> replied in the lm3532 tread. So as far as I'm concerned,
> we're good to go:
> 
> Tested-by: Tony Lindgren <tony@...mide.com>

I've tested this on 5.2-rc1, and it is still neccessary, still needed,
and still not merged.

How can I help? Can the patches simply be picked up for drm tree?

Tested-by: Pavel Machek <pavel@....cz>
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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