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authorMengdong Lin <mengdong.lin@linux.intel.com>2015-11-18 02:34:11 -0500
committerMark Brown <broonie@kernel.org>2015-11-18 18:32:24 +0000
commit1a497983a5ae62b4970187183fb3b40e68515a24 (patch)
treeab6d4b9390827fe12d234c8c6005138ed20732f5 /include/sound/soc.h
parent5015920a1732cabd1178cfe342f09ee3488a1791 (diff)
ASoC: Change the PCM runtime array to a list
Currently the number of DAI links is statically defined by the machine driver at build time using an array. This makes it difficult to shrink/ grow the number of DAI links at runtime in order to reflect any changes in topology. We can change the DAI link array in the core to a list so that PCMs and FE DAI links can be added and deleted at runtime to reflect changes in use case and DSP topology. The machine driver can still register DAI links as an array. As the 1st step, this patch change the PCM runtime array to a list. A new PCM runtime is added to the list when a DAI link is bound successfully. Later patches will further implement the DAI link list. More: - define snd_soc_new/free_pcm_runtime() to create/free a runtime. - define soc_add_pcm_runtime() to add a runtime to the rtd list. - define soc_remove_pcm_runtimes() to clean up the runtime list. - traverse the rtd list to probe the link components and dais. - Add a field "num" to PCM runtime struct, used to specify the device number when creating the pcm device, and for a soc card to access its dai_props array. - The following 3rd party machine/platform drivers iterate the rtd list to check the runtimes: sound/soc/intel/atom/sst-mfld-platform-pcm.c sound/soc/intel/boards/cht_bsw_rt5645.c sound/soc/intel/boards/cht_bsw_rt5672.c sound/soc/intel/boards/cht_bsw_max98090_ti.c Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound/soc.h')
-rw-r--r--include/sound/soc.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index a8b4b9c8b1d2..232b30d3fa68 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1106,7 +1106,7 @@ struct snd_soc_card {
/* CPU <--> Codec DAI links */
struct snd_soc_dai_link *dai_link;
int num_links;
- struct snd_soc_pcm_runtime *rtd;
+ struct list_head rtd_list;
int num_rtd;
/* optional codec specific configuration */
@@ -1201,6 +1201,9 @@ struct snd_soc_pcm_runtime {
struct dentry *debugfs_dpcm_root;
struct dentry *debugfs_dpcm_state;
#endif
+
+ unsigned int num; /* 0-based and monotonic increasing */
+ struct list_head list; /* rtd list of the soc card */
};
/* mixer control */