Viswanath L 77a7ea2c88 nvadsp: Skip ACAST setting if already set ...

It may be useful at times to boot ADSP via backdoor, even
while system boots via front door. MB2 sets the ACAST in
front door, so ACAST setting from nvadsp driver is skipped
if that region is already enabled.

Above scheme will work for ADSP backdoor boot via SMMU
mapped memory, but not for physical memory, as the underlying
carveout memory is different between frontdoor and backdoor.

Bug 200745826

Change-Id: I718da97e3f06eb86b3e40efab91275f2d5958dd4
Signed-off-by: Viswanath L <viswanathl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2675786
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Dara Ramesh <dramesh@nvidia.com>
GVS: Gerrit_Virtual_Submit

2023-06-20 15:13:15 +00:00

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