On Sat, Mar 29, 2025 at 08:14:33PM +0100, Martin Blumenstingl wrote:
> Commit 2fef64eec23a ("ASoC: hdmi-codec: Add a prepare hook") added a
> prepare implementation. Back then the new callback was only integrated
> with hdmi_codec_i2s_dai_ops (which is used by the I2S input code-path).
> It was not added to hdmi_codec_spdif_dai_ops (which is used by the SPDIF
> input code-path).
>
> With commit baf616647fe6 ("drm/connector: implement generic HDMI audio
> helpers") the DRM subsystem has gained a helper framework which can be
> used by HDMI controller drivers. HDMI controller drivers are often
> tightly coupled with the hdmi-codec because of the so-called HDMI audio
> infoframe (which is often managed by the display controller).
>
> To allow the new DRM HDMI audio framework to work with the hdmi-codec
> driver for SPDIF inputs we also need to hook up the prepare callback to
> hdmi_codec_spdif_dai_ops. Just hooking into the hw_params callback would
> not be enough as hw_params (is called too early and) doesn't have access
> to the HDMI audio infoframe contents.
>
> Suggested-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
> Signed-off-by: Martin Blumenstingl <martin.blumensti...@googlemail.com>
> ---
> Changes since v1 at [0]:
> - re-sending since there was no feedback
Almost forgot:
Reviewed-by: Dmitry Baryshkov <dmitry.barysh...@oss.qualcomm.com>
--
With best wishes
Dmitry
