From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Tore Anderson <tore@fud.no>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [BUG] HDMI 12bpc causing occasional flickering and blanking
Date: Wed, 24 Feb 2016 20:53:30 +0200 [thread overview]
Message-ID: <20160224185330.GF15993@intel.com> (raw)
In-Reply-To: <20160224184835.53d0013a@envy.w5.y.home>
On Wed, Feb 24, 2016 at 06:48:35PM +0100, Tore Anderson wrote:
> Hi Ville,
>
> > Well, just to check the details of your particular cable/dongle,
> > maybe you can post the dmesg with drm.debug=0xe with my branch?
> > Or at least the parts that refer to DP dual mode adaptors.
>
> Here: http://filebin.net/gd91wnltky/dmesg.4.5.0-rc4-g32fa589.txt
>
> I'm assuming the most important parts are:
>
> [drm:intel_hdmi_dp_dual_mode_detect] DP dual mode adaptor (type 1 HDMI) detected (max TMDS clock: 165000 kHz, TMDS OE# control: no)
> [drm:intel_hdmi_compute_config] picking bpc to 8 for HDMI output
>
> For the record, I'd call my adapter a «cable» and not a «dongle». I had
> thought it was completely passive; if there's any active circuitry
> inside it it must be really tiny - it'd have to fit inside the rather
> standard-sized HDMI/DP connectors in the ends.
Yeah, the chips used for this stuff are pretty small. I had one dongle
fry itself a while back, so I pulled it apart and found a PS8121E
chip inside it (with a number of other mostly passive components).
--
Ville Syrjälä
Intel OTC
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prev parent reply other threads:[~2016-02-24 18:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-15 19:17 [BUG] HDMI 12bpc causing occasional flickering and blanking Tore Anderson
2016-02-15 20:26 ` Ville Syrjälä
2016-02-15 22:37 ` Tore Anderson
2016-02-19 19:55 ` Tore Anderson
2016-02-23 14:41 ` Ville Syrjälä
2016-02-23 19:44 ` Tore Anderson
2016-02-24 15:09 ` Ville Syrjälä
2016-02-24 17:48 ` Tore Anderson
2016-02-24 18:53 ` Ville Syrjälä [this message]
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