On Fri, Jul 5, 2013 at 2:12 PM, Mark Brown <broonie@xxxxxxxxxx> wrote: > On Wed, Jun 19, 2013 at 01:48:15PM +0900, Inki Dae wrote: > >> > Related to HDMI sound support in Alsa, I have posted a working RFC >> > "exynos-hdmi to CDF complaint display driver". It registers a separate >> > sound card by registering hdmi audio codec dai and cpu-dai, as you >> > mentioned. But there is a problem with this approach that I2S being the >> > single cpu dai for HDMI and Speaker sound card, only one card can >> > support playback at a time. > >> > I would like to work on this to provide a more refined solution. > >> Thanks. However, I think it's not good to use the CDF framework to interface >> between ALSA SoC DAI driver and DRM HDMI driver. The purpose of the CDF >> framework is to provide common interfaces to display bus drivers to Linux >> framebuffer and DRM KMS based display controller drivers as long as I know. >> So my opinion is to implement ALSA Soc DAI driver-it seems like possible to >> use as is-based on a new common framework that the other can also use it. > > You guys really want to be discussing this on the ALSA list and CCing > the ASoC maintainers... I do note that OMAP and SH both have HDMI > support in mainline, whatever they're doing seems like a good place to > start. I don't know about SH, but at least OMAP (and I've seen same on MSM non-upstream driver, and I guess it is the same elsewhere), there end up being some calls from audio driver to functions exported by the display driver. I guess there is probably some better way to do it compared to how the existing drivers work. BR, -R > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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