From: Pierre Gondois <[email protected]> v1: - https://edk2.groups.io/g/devel/message/104127 v2: - https://edk2.groups.io/g/devel/message/110048 - Rebase patches on latest version. - Correct frequency values which were advertised in KHz when CPPC spec require them to be in MHz. v3: - https://edk2.groups.io/g/devel/message/111579 - Rebase on latest master - Use ACPI 6.5 definitions instead of 6.4 previously - Renamed ArmScmiInfoLib to DynamicTablesScmiInfoLib v4: - https://edk2.groups.io/g/devel/message/112378 - Removed Change-id left in commit messages. v5: [PATCH v4 3/3] Platform/ARM: Juno: Generate _CPC objects for JunoR2 - Removed unnecessary _CPC initialization - Moved PopulateCpcInfo() to InitializePlatformRepository() - Moved Juno revision check to InitializePlatformRepository() Added new patch - 'Platform/ARM: Juno: Use PcdDevelopmentPlatformRelaxations for _CPC'
A recent patchset [1] allows the generation of _PSD/_CPC ACPI objects by querying the relevant information through the SCMI protocol. - The _PSD object describes to which performance domain a CPU belongs. CPUs in the same performance domain have the same frequency. - The _CPC object describes an interface to control the performance level of a CPU (i.e. its frequency). Demonstrate the _PSD/_CPC generation functionality on Juno-r2 platforms. In order to work, the SCP must describe performance levels on a unified scale (i.e. not as frequencies). The following performance level values where used for testing: - little CPUs OPPs: [181, 322, 383] * 1000 - big CPUs OPPs: [512, 833, 1024] * 1024 The SCP should also: - have fast channel enabled - set the `approximate_level` feature to allow performance level requests in between OPP leveles. [1] https://edk2.groups.io/g/devel/message/114410 Pierre Gondois (4): Platform/ARM: Juno: Fix typo Platform/ARM: Juno: Generate _PSD objects Platform/ARM: Juno: Generate _CPC objects for JunoR2 Platform/ARM: Juno: Use Pcd for _CPC generation Platform/ARM/JunoPkg/ArmJuno.dsc | 5 + .../ConfigurationManager.c | 351 +++++++++++++++++- .../ConfigurationManager.h | 31 +- .../ConfigurationManagerDxe.inf | 3 + 4 files changed, 377 insertions(+), 13 deletions(-) -- 2.25.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#114422): https://edk2.groups.io/g/devel/message/114422 Mute This Topic: https://groups.io/mt/103955616/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
