Re: [PATCH 0/3] Tegra194 HW Fixes

[Takashi Iwai]

On Mon, 04 May 2020 10:48:46 +0200,
Sameer Pujar wrote:
> 
> 
> 
> On 5/4/2020 2:05 PM, Sameer Pujar wrote:
> >
> >
> > On 5/4/2020 1:59 PM, Takashi Iwai wrote:
> >> External email: Use caution opening links or attachments
> >>
> >>
> >> On Mon, 04 May 2020 10:16:13 +0200,
> >> Sameer Pujar wrote:
> >>> This series proposes SW workarounds for Tegra194 HDA HW bugs.
> >>> Following are the two issues seen:
> >>> Â 1. GCAP register does not reflect true capability.
> >>> ÂÂÂÂ The actual number of SDO lines is "4", where as it reflects "2".
> >>> Â 2. With 4 SDO line configuration playback fails for,
> >>> ÂÂÂÂ 44.1K/48K, 2-channel, 16-bps audio stream.
> >>>
> >>> After fixing [1], issue [2] is uncovered.
> >>> As per recommendation by Tegra HW team the workarounds are pushed.
> >>>
> >>> Testing done
> >>> ============
> >>> Â * Verify GCAP register after registering HDA sound card
> >>> Â * Verify audio playback for 44.1K/48K, 2-channel, 16-bps.
> >>>
> >>> Sameer Pujar (3):
> >>> ÂÂ ALSA: hda/tegra: correct number of SDO lines for Tegra194
> >>> ÂÂ ALSA: hda: add member to store ratio for stripe control
> >>> ÂÂ ALSA: hda/tegra: workaround playback failure on Tegra194
> >> Through a quick glance, all changes look good.
> >>
> >> Is the device already in market, i.e. it had hit users? If yes, I'm
> >> going to merge for 5.7, otherwise for 5.8.
> >
> > Yes the device is in the market. But has not been reported by end users.
> > During internal resting this has been discovered. I am fine with
> > merging this to 5.8.
> 
> To add, end users currently won't see this problem because things work
> fine with 2-SDO lines. The issue is seen when Tegra194 is allowed to
> utilize its actual capability of 4-SDO lines.

Thanks for the information.  Then I queued all three patches now to
for-next branch destined for 5.8.


Takashi