[PATCH v3 4/6] ASoC: tegra: ahub: Add missing resets

Dmitry Osipenko
2021-01-20T00:35:02Z

AHUB driver misses D_AUDIO and APBIF resets. CPU hangs on trying to
access hardware if resets aren't de-asserted. This problem is currently
masked by the tegra-clk driver which implicitly de-asserts the resets when
the corresponding clocks are enabled. Soon the implicit de-assertion will
be gone from the tegra-clk driver, thus we need to fix the AHUB driver.
Add the missing resets to the driver.

Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30 audio works
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30 boot-tested
Tested-by: Dmitry Osipenko <digetx@gmail.com> # Nexus7 T30 audio works
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # TK1 boot-tested
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
sound/soc/tegra/tegra30_ahub.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/sound/soc/tegra/tegra30_ahub.c b/sound/soc/tegra/tegra30_ahub.c
index 156e3b9d613c..8c32333cc08c 100644
--- a/sound/soc/tegra/tegra30_ahub.c
+++ b/sound/soc/tegra/tegra30_ahub.c
@@ -337,6 +337,8 @@ static const struct {
const char *rst_name;
u32 mod_list_mask;
} configlink_mods[] = {
+ { "d_audio", MOD_LIST_MASK_TEGRA30_OR_LATER },
+ { "apbif", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s0", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s1", MOD_LIST_MASK_TEGRA30_OR_LATER },
{ "i2s2", MOD_LIST_MASK_TEGRA30_OR_LATER },
--
2.29.2