Hi Bhaumik,
On 1/14/21 11:16 AM, Bhaumik Bhatt wrote:
During full boot chain firmware download, the PM state worker
downloads the AMSS image after waiting for the SBL execution
environment change in PBL mode itself. Since getting rid of the
firmware load worker thread, this design needs to change and MHI
Can we reword this as current driver does not have firmware load worker
thread. Basically change is to avoid blocking st worker thread with a
timeout to get SBL EE before starting AMSS image download. Instead
trigger AMSS image download directly from the st worker thread when
DEV_ST_TRANSITION_SBL is queued.
host must download the AMSS image from the SBL mode of PM state
worker thread instead. Since the full boot chain firmware
download is associated with a synchronous power up and has MHI
host waiting for a transition to mission mode with a timeout, we
can skip creating any devices (or probing any client drivers) in
SBL mode transition and proceed directly with the AMSS image
download.
This means that if MHI host driver is not responsible for the
AMSS image download or the controller plans to have client
drivers opening any SBL channels, for example, to download images
or monitor debug logs for memory allocations or power management,
the device can be powered up asynchronously.
[..]
Thanks,
Hemant
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