On 23.03.2021 14:15, Jaroslav Kysela wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > Dne 23. 03. 21 v 12:43 Codrin Ciubotariu napsal(a): > >> To achieve this, the first thing needed is to detect whether a HW >> constraint rule is enforced by a FE or a BE DAI. This means that >> snd_pcm_hw_rule_add() needs to be able to differentiate between the two >> type of DAIs. For this, the runtime pointer to struct snd_pcm_runtime is >> replaced with a pointer to struct snd_pcm_substream, to be able to reach >> substream->pcm->internal to differentiate between FE and BE DAIs. > > Think about other not-so-invasive solution. What about to use > 'runtime->private_data' (struct snd_soc_pcm_runtime *) to determine FE / BE? > I think struct snd_soc_pcm_runtime * is placed in substream->private_data, while runtime->private_data is used more by the platform drivers. runtime->trigger_master could be an idea, but it looks like it's initialized just before the trigger callback is called, way after the constraint rules are added and I am not sure it can be initialized earlier... Best regards, Codrin
