linux-kernel - [PATCH 0/3] Tegra194 HW Fixes

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Date:   Mon, 4 May 2020 13:46:13 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     <perex@...ex.cz>, <tiwai@...e.com>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <linux-tegra@...r.kernel.org>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <sharadg@...dia.com>,
        <mkumard@...dia.com>, <viswanathl@...dia.com>,
        <rlokhande@...dia.com>, <dramesh@...dia.com>,
        <atalambedu@...dia.com>, Sameer Pujar <spujar@...dia.com>
Subject: [PATCH 0/3] Tegra194 HW Fixes

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

 include/sound/hdaudio.h     |  3 +++
 sound/hda/hdac_controller.c | 11 ++++++++++
 sound/hda/hdac_stream.c     |  2 +-
 sound/pci/hda/hda_tegra.c   | 50 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 65 insertions(+), 1 deletion(-)

-- 
2.7.4