From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org, intel-gfx@lists.freedesktop.org,
rakesh.a.ughreja@intel.com
Subject: Re: [PATCH 2/7] drm/i915: add DisplayPort amp unmute for LPE audio mode
Date: Thu, 2 Feb 2017 12:06:05 +0200 [thread overview]
Message-ID: <20170202100605.GG31595@intel.com> (raw)
In-Reply-To: <s5ho9ykap9x.wl-tiwai@suse.de>
On Thu, Feb 02, 2017 at 10:57:30AM +0100, Takashi Iwai wrote:
> On Tue, 31 Jan 2017 22:36:44 +0100,
> Takashi Iwai wrote:
> >
> > From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> >
> > Enable unmute/mute amp notification. This doesn't seem to affect
> > HDMI support so this is done unconditionally.
> >
> > An earlier version of this patch set a chicken bit at address 0x62F38
> > prior to the mute/unmute but this register doesn't seem to do anything
> > so this phase was removed.
>
> Sorry, this seems like a wrong result. It worked yesterday, but when
> I retested the latest code today, it didn't work any longer.
> Then, after setting the chicken bit, it starts working again.
>
> But now I can't make it broken again. Turn off the monitor, turn off
> the machine, DPMS off, suspend/resume... All still works without
> chicken bit set.
>
> Also, the chicken bit of the register 0x62f38 couldn't be read back.
> The register always returns zero when read.
The docs do say it's write-only actually.
--
Ville Syrjälä
Intel OTC
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next prev parent reply other threads:[~2017-02-02 10:06 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-31 21:36 [PATCH 0/7] DisplayPort audio support on Cherrytrail Takashi Iwai
2017-01-31 21:36 ` [PATCH 1/7] drm/i915: add DP support in LPE audio mode Takashi Iwai
2017-01-31 21:36 ` [PATCH 2/7] drm/i915: add DisplayPort amp unmute for " Takashi Iwai
2017-02-01 14:45 ` Ville Syrjälä
2017-02-01 14:53 ` Takashi Iwai
2017-02-01 15:11 ` Ville Syrjälä
2017-02-01 15:24 ` Takashi Iwai
2017-02-02 9:57 ` Takashi Iwai
2017-02-02 10:06 ` Ville Syrjälä [this message]
2017-02-02 10:13 ` Takashi Iwai
2017-01-31 21:36 ` [PATCH 3/7] drm/i915: Avoid MST pipe handling for LPE audio Takashi Iwai
2017-01-31 21:36 ` [PATCH 4/7] drm/i915: Pass pipe to LPE audio notification Takashi Iwai
2017-01-31 21:36 ` [PATCH 5/7] ALSA: x86: intel_hdmi: add definitions and logic for DP audio Takashi Iwai
2017-01-31 21:36 ` [PATCH 6/7] ALSA: x86: Use config base depending on the pipe Takashi Iwai
2017-01-31 21:36 ` [PATCH 7/7] drm/i915: Pass platform device to LPE audio notifier Takashi Iwai
2017-03-13 8:33 ` [PATCH 0/7] DisplayPort audio support on Cherrytrail Daniel Vetter
2017-03-31 6:29 ` Daniel Vetter
2017-03-31 6:40 ` Takashi Iwai
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