Messages in this thread | | | Subject | Re: [PATCH 0/3] Tegra194 HW Fixes | From | Sameer Pujar <> | Date | Mon, 4 May 2020 14:18:46 +0530 |
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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: >>> 1. GCAP register does not reflect true capability. >>> The actual number of SDO lines is "4", where as it reflects "2". >>> 2. With 4 SDO line configuration playback fails for, >>> 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 >>> ============ >>> * Verify GCAP register after registering HDA sound card >>> * Verify audio playback for 44.1K/48K, 2-channel, 16-bps. >>> >>> Sameer Pujar (3): >>> ALSA: hda/tegra: correct number of SDO lines for Tegra194 >>> ALSA: hda: add member to store ratio for stripe control >>> 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, > Sameer. >> >> >> thanks, >> >> Takashi >
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