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| author | Mohan Kumar <mkumard@nvidia.com> | 2022-02-16 14:52:36 +0530 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-02-21 11:03:35 +0100 |
| commit | b58d511ded88ebfc14381eb9fe6e66080e8ed10f (patch) | |
| tree | 17091a39468d7d5416a4d28d85f6a38e27c4370a /sound/pci | |
| parent | f43156a9563f9262d7852ab79770f38f1fae7d76 (diff) | |
| download | linux-stable-b58d511ded88ebfc14381eb9fe6e66080e8ed10f.tar.gz linux-stable-b58d511ded88ebfc14381eb9fe6e66080e8ed10f.tar.bz2 linux-stable-b58d511ded88ebfc14381eb9fe6e66080e8ed10f.zip | |
ALSA: hda/tegra: Hardcode GCAP ISS value on T234
The GCAP register on Tegra234 implies no Input Streams(ISS)
supported, but the HW output stream descriptor programming
should start with offset 0x20*4 from base stream descriptor
address. This will be a problem while calculating the offset
for output stream descriptor which will be considering input
stream also. So here output stream starts with offset 0 which
is wrong as HW register for output stream offset starts with 4.
So hardcode the input stream numbers to 4 to avoid the issue
in offset calculation.
Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Link: https://lore.kernel.org/r/20220216092240.26464-3-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_tegra.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 95df52b0505b..2347d0304f93 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -315,6 +315,18 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev) * hardcoded value */ chip->capture_streams = (gcap >> 8) & 0x0f; + + /* The GCAP register on Tegra234 implies no Input Streams(ISS) support, + * but the HW output stream descriptor programming should start with + * offset 0x20*4 from base stream descriptor address. This will be a + * problem while calculating the offset for output stream descriptor + * which will be considering input stream also. So here output stream + * starts with offset 0 which is wrong as HW register for output stream + * offset starts with 4. + */ + if (of_device_is_compatible(np, "nvidia,tegra234-hda")) + chip->capture_streams = 4; + chip->playback_streams = (gcap >> 12) & 0x0f; if (!chip->playback_streams && !chip->capture_streams) { /* gcap didn't give any info, switching to old method */ |