On 9/20/17 5:00 AM, Takashi Iwai wrote:
On Wed, 20 Sep 2017 00:25:05 +0200,
Pierre-Louis Bossart wrote:
From: Sriram Periyasamy <sriramx.periyasamy@xxxxxxxxx>
On recent Intel platforms (Haswell, Broadwell, Skylake, ApolloLake,
KabyLake, ...), the IEC Coding Type (ICT) bitfield in the Digital
Converter Control #3 needs to be set explicitly for HDMI/DisplayPort
High Bit Rate (HBR) audio playback to work. This was not required in
earlier platforms when HBR was first introduced. The ICT bits are
defined in Section 7.3.3.9 of the HDaudio 1.0a specification.
Since the ICT bitfield was not specified for HDAudio 1.0 devices
(before 2009), we only program it on machines more recent than
Haswell.
We tested that this fix is not needed on Baytrail-I (MinnowBoard
Turbot) and believe by extension it also does not apply to Braswell.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98797
Signed-off-by: Sriram Periyasamy <sriramx.periyasamy@xxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@xxxxxxxxx>
---
v2: move digi3 verb in Set section, only set ICT for haswell and newer
Applied now with a slight fix (moving *_SET_* definition to the right
place).
Thanks Takashi. Not sure what happened since I have a clear memory of
doing that change and making a note of it...
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