Hi Rusell, On 04/27/2012 08:28 AM, Russell King - ARM Linux wrote:
When building ALSA as modules: drivers/built-in.o: In function `omapdss_hdmihw_remove': omap_hwspinlock.c:(.text+0x23da8): undefined reference to `snd_soc_unregister_codec' drivers/built-in.o: In function `omapdss_hdmihw_probe': omap_hwspinlock.c:(.text+0x24248): undefined reference to `snd_soc_register_codec' (the filename is inaccurate). This happens because drivers/video/omap2/dss/hdmi.c is built-in and uses ASoC services, but ASoC and ALSA are modular.
As you mention, this happens because the ASoC HDMI codec is embeeded in the DSS driver. There is a set of patches currently under discussion to decouple the ASoC HDMI codec from DSS[1]. This will fix the issue.
BR, [1]http://www.spinics.net/lists/linux-omap/msg67307.html Ricardo
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