From: Philipp Zabel <p.zabel@pengutronix.de>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Thierry Reding <treding@nvidia.com>,
kernel@pengutronix.de, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 3/4] drm: bridge/dw-hdmi: detect initial connector state
Date: Fri, 08 Jan 2016 12:40:22 +0100 [thread overview]
Message-ID: <1452253222.3347.21.camel@pengutronix.de> (raw)
In-Reply-To: <20160108112449.GH19062@n2100.arm.linux.org.uk>
Am Freitag, den 08.01.2016, 11:24 +0000 schrieb Russell King - ARM
Linux:
> On Fri, Jan 08, 2016 at 10:02:06AM +0100, Philipp Zabel wrote:
> > Allow userspace to read the initial connector state via sysfs without
> > having to issue a detect manually. There is no reason to keep the state
> > unknown during initialization.
>
> Can you describe how it can be unknown? I've always seen the state to be
> correctly initialised on iMX6 irrespective of whether a sink is connected
> or not. However, I always have the FB helper and FB console enabled.
I have FB helper and console disabled. Since the kernel doesn't set a
mode automatically, in this case the modes are never requested, and
detect is not called by anyone.
Until userspace issues the detect, either via the DRM API or by writing
"detect" into /sys/class/drm/card0-HDMI-A-1/status, this sysfs file
reads "unknown".
regards
Philipp
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next prev parent reply other threads:[~2016-01-08 11:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-08 9:02 [PATCH 1/4] drm: bridge/dw-hdmi: cache edid data Philipp Zabel
2016-01-08 9:02 ` [PATCH 2/4] drm: bridge/dw-hdmi: remove unused code Philipp Zabel
2016-01-08 9:02 ` [PATCH 3/4] drm: bridge/dw-hdmi: detect initial connector state Philipp Zabel
2016-01-08 11:24 ` Russell King - ARM Linux
2016-01-08 11:40 ` Philipp Zabel [this message]
2016-03-02 16:35 ` Thierry Reding
2016-01-08 9:02 ` [PATCH 4/4] drm: bridge/dw-hdmi: use rx sense for plug detection if hpd is unreliable Philipp Zabel
2016-01-08 11:34 ` Russell King - ARM Linux
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