On Wed, Sep 20, 2017 at 08:12:36AM -0500, Pierre-Louis Bossart wrote: > 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... Hi Takashi, I think this patch should have also gone to stable. We didn't cc. Please suggest whether we should submit it separately for stable. Regards, Subhransu > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel -- _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
