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From:   Peter Geis <pgwipeout@gmail.com>
To:     Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Peter De Schrijver <pdeschrijver@nvidia.com>,
        Prashant Gaikwad <pgaikwad@nvidia.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Sameer Pujar <spujar@nvidia.com>,
        Mohan Kumar <mkumard@nvidia.com>
Cc:     linux-clk@vger.kernel.org, linux-tegra@vger.kernel.org,
        linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org,
        Peter Geis <pgwipeout@gmail.com>
Subject: [PATCH v2 0/2] fix tegra-hda on tegra30 devices
Date:   Fri,  8 Jan 2021 13:59:11 +0000
Message-Id: <20210108135913.2421585-1-pgwipeout@gmail.com>
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Precedence: bulk

The following patches fix tegra-hda on legacy tegra devices.
Two issues were discovered preventing tegra-hda from functioning:
-The hda clocks on tegra30 were assigned to clk_m and running at too low
of a rate to function.
-The tegra-hda encounters an input/output error when opening a stream.

Since the only mainline device that used tegra-hda until recently was the
t124, it is unknown exactly when this was broken. Fortunately a recent
patch was submitted that fixed the issue only on t194 devices. We can
apply it to the tegra30-hda device to resolve the issue across the board.
Note that downstream devices used the spdif device instead of hda for hdmi
audio. The spdif device lacks a driver on mainline.

-Checkpatch seems to have issues finding [1], but git show has no issue.
[1] commit 60019d8c650d ("ALSA: hda/tegra: workaround playback failure on
Tegra194")

Changelog:

v2:
-Added ack and reviewed-by from Jon
-Updated fix to apply to tegra30-hda vice universally (Thanks Jon)
-Updated commit to include comments from hardware team (Thanks Sameer)
-Cleaned up commit messages

Peter Geis (2):
  clk: tegra30: Add hda clock default rates to clock driver
  ALSA: hda/tegra: fix tegra-hda on tegra30 soc

 drivers/clk/tegra/clk-tegra30.c | 2 ++
 sound/pci/hda/hda_tegra.c       | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

-- 
2.25.1