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From: Imre Deak <imre.deak@intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 1/2] drm/i915: take a power domain ref only when needed during HDMI detect
Date: Thu, 19 Nov 2015 23:01:49 +0200	[thread overview]
Message-ID: <1447966909.7864.13.camel@intel.com> (raw)
In-Reply-To: <20151119205120.GA24442@nuc-i3427.alporthouse.com>

On Thu, 2015-11-19 at 20:51 +0000, Chris Wilson wrote:
> On Thu, Nov 19, 2015 at 08:55:00PM +0200, Imre Deak wrote:
> > Suggested by Ville.
> 
> Do you mind explaining why this is done at the hdmi level and not the
> gmbus level?

To reduce the on/off toggling, since we don't have delayed power-off
implemented for power wells. gmbus_xfer also takes a ref to account for
accesses from the i2c device node. The solution would be to implement
delayed power-off I guess.

--Imre
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  reply	other threads:[~2015-11-19 21:01 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-19 18:55 [PATCH 1/2] drm/i915: take a power domain ref only when needed during HDMI detect Imre Deak
2015-11-19 18:55 ` [PATCH 2/2] drm/i915: take a power domain reference while checking the HDMI live status Imre Deak
2015-11-19 19:08   ` Ville Syrjälä
2015-11-19 19:13     ` Imre Deak
2015-11-19 19:17       ` Ville Syrjälä
2015-11-20  9:54         ` Imre Deak
2015-11-20 10:12           ` Imre Deak
2015-11-20 11:13             ` Jani Nikula
2015-11-24 14:23               ` Imre Deak
2015-11-19 20:51 ` [PATCH 1/2] drm/i915: take a power domain ref only when needed during HDMI detect Chris Wilson
2015-11-19 21:01   ` Imre Deak [this message]
2015-11-19 21:38     ` Chris Wilson
2015-11-19 21:50       ` Imre Deak
2015-11-19 22:24         ` Imre Deak

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