kernel/drivers/platform/x86/intel/pmc/mtl.c, branch linux-6.9.y

Merge tag 'platform-drivers-x86-v6.7-6' into pdx86/for-next

2024-01-02T12:13:01Z

Merge the 'platform-drivers-x86-v6.7-6' fixes into pdx86/for-next so that the "Intel PMC GBE LTR regression" fixes can also be applied to the new Arrow Lake and Lunar Lake platform support code in pdx86/for-next .

platform/x86/intel/pmc: Move GBE LTR ignore to suspend callback

2023-12-29T13:31:22Z

Commit 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()") caused a network performance regression due to the GBE LTR ignore that it added at probe. This was needed in order to allow the SoC to enter the deepest Package C state. To fix the regression and at least support PC10 during suspend, move the LTR ignore from probe to the suspend callback, and enable it again on resume. This solution will allow PC10 during suspend but restrict Package C entry at runtime to no deeper than PC8/9 while a network cable it attach to the PCH LAN. Fixes: 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()") Signed-off-by: "David E. Box" Link: https://lore.kernel.org/r/20231223032548.1680738-6-david.e.box@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86/intel/pmc: Allow reenabling LTRs

2023-12-29T13:31:15Z

Commit 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()") caused a network performance regression due to the GBE LTR ignore that it added during probe. The fix will move the ignore to occur at suspend-time (so as to not affect suspend power). This will require the ability to enable the LTR again on resume. Modify pmc_core_send_ltr_ignore() to allow enabling an LTR. Fixes: 804951203aa5 ("platform/x86:intel/pmc: Combine core_init() and core_configure()") Signed-off-by: "David E. Box" Link: https://lore.kernel.org/r/20231223032548.1680738-5-david.e.box@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen

platform/x86/intel/pmc: Add ssram_init flag in PMC discovery in Meteor Lake

2023-12-19T15:48:27Z

If PMC discovery using pmc_core_ssram_init() was unsuccessful for the Meteor Lake platform, the legacy enumeration method is used. In this case pci device struct for the PMC SSRAM is not available and pmc_core_ssram_get_lpm_reqs() will not work. Add ssram_init flag to indicate if the PMC SSRAM initialization was successful or not. Call pmc_core_ssram_get_lpm_reqs() only if the ssram_init flag is set to true. Signed-off-by: Rajvi Jingar Link: https://lore.kernel.org/r/20231219042216.2592029-6-rajvi.jingar@linux.intel.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede

platform/x86/intel/pmc: Move common code to core.c

2023-12-19T15:48:24Z

Functions like mtl_set_device_d3() and mtl_punit_pmt_init() were added for Meteor Lake. To be able to use them in Arrow Lake and future platforms, move them to core.c. Also, to support different guids, add guid argument in pmc_core_punit_pmt_init() and to support different PCI function numbers, add func arg in pmc_core_ssram_init(). Signed-off-by: Rajvi Jingar Link: https://lore.kernel.org/r/20231219042216.2592029-5-rajvi.jingar@linux.intel.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede

platform/x86/intel/pmc: Fix in mtl_punit_pmt_init()

2023-12-19T15:48:05Z

pci_get_domain_bus_and_slot() increases the reference count on the pci device that is used to register the endpoint. In case of failure in registration, decrease reference count using pci_dev_put(pcidev) before returning. Fixes: 6e7964855381 ("platform/x86/intel/pmc: Show Die C6 counter on Meteor Lake") Signed-off-by: Rajvi Jingar Signed-off-by: David E. Box Link: https://lore.kernel.org/r/20231219042216.2592029-1-rajvi.jingar@linux.intel.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede

platform/x86/intel/pmc: Show Die C6 counter on Meteor Lake

2023-12-04T13:53:43Z

Expose the Die C6 counter on Meteor Lake. Signed-off-by: David E. Box Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20231129222132.2331261-21-david.e.box@linux.intel.com Signed-off-by: Hans de Goede

platform/x86/intel/pmc: Read low power mode requirements for MTL-M and MTL-P

2023-12-04T13:53:43Z

Add support to read the low power mode requirements for Meteor Lake M and Meteor Lake P. Signed-off-by: Xi Pardee Signed-off-by: David E. Box Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20231129222132.2331261-19-david.e.box@linux.intel.com Signed-off-by: Hans de Goede

platform/x86/intel/pmc/mtl: Use return value from pmc_core_ssram_init()

2023-12-04T13:53:43Z

Instead of checking for a NULL regbase, use the return value from pmc_core_ssram_init() to check if PMC discovery was successful. If not, use the legacy enumeration method (which only works for the primary PMC). Signed-off-by: David E. Box Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20231129222132.2331261-15-david.e.box@linux.intel.com Signed-off-by: Hans de Goede

platform/x86:intel/pmc: Call pmc_get_low_power_modes from platform init

2023-12-04T13:53:43Z

In order to setup a table of low power mode requirements for Meteor Lake, pmc_core_get_low_power_modes() will need to be run from platform init code so that the enabled modes are known, allowing the use of the pmc_for_each_mode helper. Make the function global and call it from the platform init code. Signed-off-by: Xi Pardee Signed-off-by: David E. Box Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20231129222132.2331261-12-david.e.box@linux.intel.com Signed-off-by: Hans de Goede