[QNN-EP] Disable DSPQ polling when needed

[quic-calvnguy]

Description

Create new class to handle HTP power config updates
Only update if there are changes to power config settings
On dynamic htp perf mode updates, disable DSPQ polling if perf mode is not burst

Motivation and Context

Currently, if a session has set the performance mode to burst then changed the performance mode to anything else, DSPQ polling will be enabled and never disabled. This change is to allow disabling of DSPQ polling when the performance mode is not burst, even on updates.

[quic-calvnguy]

This PR is based on another PR:
#26457

The reason for this is that PR 26457 removes per-thread HTP power config ids and creates these ids on a per-session basis. Implementing this PR's changes without PR 26457's changes would require unnecessary work that would otherwise be removed by PR 26457 anyway.

[yuslepukhin]

if (rt != Status::OK())

nit: IsOK().

[yuslepukhin]

This is missing negation. !rt.IsOK()

[Copilot]

Pull request overview

This PR introduces a new HtpPowerConfigManager class to handle HTP power configuration updates more efficiently and fixes an issue where DSPQ polling remained enabled after switching from burst mode to other performance modes. The key improvement is that power configs are only updated when values actually change, and RPC polling is properly disabled (set to 0) when performance mode is not burst.

Key changes:

• Created HtpPowerConfigManager class to track and stage power configuration changes before applying them
• Modified power config logic to explicitly disable DSPQ polling (rpc_polling_time=0) when performance mode is not burst
• Separated kHtpSustainedHighPerformance from kHtpBurst with different voltage corner settings

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
qnn_htp_power_config_manager.h	New header defining the HtpPowerConfigManager class that stages and applies power config changes
qnn_htp_power_config_manager.cc	Implementation of HtpPowerConfigManager with logic to track last-set values and only update changed configs
qnn_backend_manager.h	Updated to use the new HtpPowerConfigManager and consolidated SetHtpPowerConfigs method
qnn_backend_manager.cc	Refactored to use HtpPowerConfigManager, removing old SetHtpPowerConfig and SetRpcPowerConfigs methods
qnn_execution_provider.h	Added SetHtpPowerConfigs declaration and changed GetPerThreadHtpPowerConfigs signature to return bool
qnn_execution_provider.cc	Updated logic to set rpc_polling_time based on performance mode (9999 for burst, 0 otherwise)
qnn_def.h	Updated PerThreadHtpPowerConfigs struct to use separate optionals for RPC configs and added new constants

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[edgchen1]

/azp run Linux QNN CI Pipeline,Win_TRT_Minimal_CUDA_Test_CI,Windows ARM64 QNN CI Pipeline,Windows GPU Doc Gen CI Pipeline

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[yuslepukhin]

🕐