In order to set up a pipeline with IPC4, the total memory usage for the
pipeline needs to be calculated based on the list of connected widgets.
Add a new ipc_prepare() op to struct sof_ipc_tplg_widget_ops that will be
used to calculate the memory usage for each widget in the pipelines
associated with a PCM and prepare the widget for getting set up in the
DSP. The prepare step will be used to allocate memory for the IPC
payload, assign instance ID and update the config data for the widget
based on the runtime PCM params. Once prepared, the setup step is used
to send the IPC to create the widget in the DSP.

Add an ipc_unprepare() op to unprepare the widget i.e free the memory
allocated during prepare, free the instance ID etc. This should be
invoked after the widget is freed.

A new flag "prepared" is added to struct snd_sof_widget to track the
prepared status of widgets.

Also, IPC4 requires the platform_params and the runtime PCM params in
order to prepare a widget for set up. So modify the signature of
sof_pcm_setup_connected_widgets() and sof_widget_list_setup() to accept
these as arguments.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220426171743.171061-12-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>