| Message ID | 20241205023344.2232529-1-alexey.klimov@linaro.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | db845c/rb3: add i2s playback support | expand |
On Thu, Dec 05, 2024 at 02:33:41AM +0000, Alexey Klimov wrote: > There are i2s signals provided in low-speed connector on such boards > as required by 96boards spec. Looks like it is possible to actually > playback something via these pins after adding missing parts here > and there. > I tested simple widely available cheap DACs like UDA1334 and PCM5102A > and they works just fine without need for mclk. I guess any DAC that > can handle 48 kHz and 16bit will do. > In theory db845 can work without mezzanine board and this provides > one more use-case to playback sound and not all mezzanines have cosy > audio connectors. I would expect that when something is connected to the DAI there would also be a DT update describing that CODEC and it's parameters.
On Thu, 05 Dec 2024 02:33:41 +0000, Alexey Klimov wrote: > There are i2s signals provided in low-speed connector on such boards > as required by 96boards spec. Looks like it is possible to actually > playback something via these pins after adding missing parts here > and there. > > I tested simple widely available cheap DACs like UDA1334 and PCM5102A > and they works just fine without need for mclk. I guess any DAC that > can handle 48 kHz and 16bit will do. > > [...] Applied to https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next Thanks! [2/3] ASoC: qcom: sdm845: add handling of secondary MI2S clock commit: 8bfb66c75cdace542dabe87841152614fd5b8d91 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark
There are i2s signals provided in low-speed connector on such boards as required by 96boards spec. Looks like it is possible to actually playback something via these pins after adding missing parts here and there. I tested simple widely available cheap DACs like UDA1334 and PCM5102A and they works just fine without need for mclk. I guess any DAC that can handle 48 kHz and 16bit will do. In theory db845 can work without mezzanine board and this provides one more use-case to playback sound and not all mezzanines have cosy audio connectors. After staring at https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210621074152.306362-1-judyhsiao@chromium.org/ I suspect that this might not gonna fly since it requires dummy codec. Or maybe specific half-dummy qcom codec for such use-case is required to verify hw parameters. Couldn't say. Alexey Klimov (3): ASoC: qcom: common: set codecless link to be a backend ASoC: qcom: sdm845: add handling of secondary MI2S clock arm64: dts: qcom: sdm845-db845c: add i2s playback support via LS1 connector arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 43 +++++++++++++++++++++- sound/soc/qcom/common.c | 4 ++ sound/soc/qcom/sdm845.c | 5 ++- 3 files changed, 48 insertions(+), 4 deletions(-)