include/sound/soc-dai.h | 3 +++ sound/soc/soc-dai.c | 27 +++++++++++++++++++-------- sound/soc/soc-dapm.c | 12 ++++++++++++ 3 files changed, 34 insertions(+), 8 deletions(-)
Hello, the DRM subsystem has recently gained a HDMI audio codec framework [0]. This is already queued for Linux 6.14. I want to implement a HDMI controller driver for the Amlogic Meson8/8b/8m2 SoCs using the DRM HDMI audio codec framework. Internally the DRM HDMI audio codec framework relies on hdmi-codec's .prepare callback to be called. This unfortunately is not happening on Amlogic Meson8/8b/8m2 platforms [1]. Jerome suggested that this may be because of the codec-to-codec link on our Amlogic AIU audio driver [2]. He encouraged me to send this series to allow hdmi-codec's .prepare() callback to be called - even on platforms that connect it via a codec-to-codec link. The reason why this series is marked as RFC is that I'm not familiar with the ASoC subsystem and lot of the functionality and terminology is new to me. Also I Cc'ed Sylwester Nawrocki (Samsung maintainer) as codec-to-codec links seem to be most heavily used on Samsung and Amlogic platforms. Changes since v1 at [3]: - updated patch #2 to also prepare the source side of the link for consistency reasons (as suggested by Jerome and Mark) [0] https://lore.kernel.org/dri-devel/20241224-drm-bridge-hdmi-connector-v10-0-dc89577cd438@linaro.org/ [1] https://lore.kernel.org/linux-amlogic/CAFBinCDdiJ3UNVUcShjq=7U2=oUwT3ciYdKSuZ5TdcrikxFBpg@mail.gmail.com/ [2] https://lore.kernel.org/linux-amlogic/1ja5c4b4rt.fsf@starbuckisacylon.baylibre.com/ [3] https://lore.kernel.org/linux-sound/20250106141316.375984-1-martin.blumenstingl@googlemail.com/ Martin Blumenstingl (2): ASoC: soc-dai: add snd_soc_dai_prepare() and use it internally ASoC: dapm: add support for preparing streams include/sound/soc-dai.h | 3 +++ sound/soc/soc-dai.c | 27 +++++++++++++++++++-------- sound/soc/soc-dapm.c | 12 ++++++++++++ 3 files changed, 34 insertions(+), 8 deletions(-) -- 2.47.1
On Fri 10 Jan 2025 at 22:07, Martin Blumenstingl <martin.blumenstingl@googlemail.com> wrote: > Hello, > > the DRM subsystem has recently gained a HDMI audio codec framework [0]. > This is already queued for Linux 6.14. > > I want to implement a HDMI controller driver for the Amlogic > Meson8/8b/8m2 SoCs using the DRM HDMI audio codec framework. Internally > the DRM HDMI audio codec framework relies on hdmi-codec's .prepare > callback to be called. This unfortunately is not happening on Amlogic > Meson8/8b/8m2 platforms [1]. > > Jerome suggested that this may be because of the codec-to-codec link on > our Amlogic AIU audio driver [2]. He encouraged me to send this series > to allow hdmi-codec's .prepare() callback to be called - even on > platforms that connect it via a codec-to-codec link. > > The reason why this series is marked as RFC is that I'm not familiar > with the ASoC subsystem and lot of the functionality and terminology > is new to me. > > Also I Cc'ed Sylwester Nawrocki (Samsung maintainer) as codec-to-codec > links seem to be most heavily used on Samsung and Amlogic platforms. > > Changes since v1 at [3]: > - updated patch #2 to also prepare the source side of the link for > consistency reasons (as suggested by Jerome and Mark) > > > [0] https://lore.kernel.org/dri-devel/20241224-drm-bridge-hdmi-connector-v10-0-dc89577cd438@linaro.org/ > [1] https://lore.kernel.org/linux-amlogic/CAFBinCDdiJ3UNVUcShjq=7U2=oUwT3ciYdKSuZ5TdcrikxFBpg@mail.gmail.com/ > [2] https://lore.kernel.org/linux-amlogic/1ja5c4b4rt.fsf@starbuckisacylon.baylibre.com/ > [3] https://lore.kernel.org/linux-sound/20250106141316.375984-1-martin.blumenstingl@googlemail.com/ > > > Martin Blumenstingl (2): > ASoC: soc-dai: add snd_soc_dai_prepare() and use it internally > ASoC: dapm: add support for preparing streams Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Not sure the RFC tag was necessary, this could go in as it is I suppose. Thanks Martin ! > > include/sound/soc-dai.h | 3 +++ > sound/soc/soc-dai.c | 27 +++++++++++++++++++-------- > sound/soc/soc-dapm.c | 12 ++++++++++++ > 3 files changed, 34 insertions(+), 8 deletions(-) -- Jerome
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