From dd882f3812c5fe2fa3f709ed5e61938e723ba51d Mon Sep 17 00:00:00 2001 From: Felix Held Date: Wed, 12 May 2021 01:23:50 +0200 Subject: soc/amd/cezanne/root_complex: generate DPTC ACPI method This adds support for convertible devices to support different maximum power and thermal configurations. The dynamic power and thermal configuration (DPTC) via ACPI ALIB calls allows to change the parameters during runtime. This code contains the assumption that \_SB.PCI0.LPCB.EC0.TBMD exists when ACPI code calls the DPTC method. At the moment only chromeec declares EC0.TBMD, but it's also the only code that calls the DPTC method. The definition of DPTC_INPUTS isn't moved to the common code directory, since it's currently unsure if we might need to configure more than those 4 parameters for Cezanne. Signed-off-by: Felix Held Change-Id: Ibdfc056cb325a32d87505dd93e01c9af81dfd6c5 Reviewed-on: https://review.coreboot.org/c/coreboot/+/54074 Tested-by: build bot (Jenkins) Reviewed-by: Raul Rangel --- src/soc/amd/cezanne/Kconfig | 1 + src/soc/amd/cezanne/root_complex.c | 75 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) (limited to 'src/soc/amd') diff --git a/src/soc/amd/cezanne/Kconfig b/src/soc/amd/cezanne/Kconfig index 327ec124d2..2cedf8c2d0 100644 --- a/src/soc/amd/cezanne/Kconfig +++ b/src/soc/amd/cezanne/Kconfig @@ -38,6 +38,7 @@ config SOC_SPECIFIC_OPTIONS select SOC_AMD_COMMON_BLOCK_ACP select SOC_AMD_COMMON_BLOCK_ACPI select SOC_AMD_COMMON_BLOCK_ACPIMMIO + select SOC_AMD_COMMON_BLOCK_ACPI_ALIB select SOC_AMD_COMMON_BLOCK_ACPI_GPIO select SOC_AMD_COMMON_BLOCK_AOAC select SOC_AMD_COMMON_BLOCK_APOB diff --git a/src/soc/amd/cezanne/root_complex.c b/src/soc/amd/cezanne/root_complex.c index 5d021baa5b..3ed137ce19 100644 --- a/src/soc/amd/cezanne/root_complex.c +++ b/src/soc/amd/cezanne/root_complex.c @@ -1,6 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include #include +#include #include #include #include @@ -13,6 +15,37 @@ #include #include #include +#include "chip.h" + +#define DPTC_TOTAL_UPDATE_PARAMS 4 + +struct dptc_input { + uint16_t size; + struct alib_dptc_param params[DPTC_TOTAL_UPDATE_PARAMS]; +} __packed; + +#define DPTC_INPUTS(_thermctllmit, _sustained, _fast, _slow) \ + { \ + .size = sizeof(struct dptc_input), \ + .params = { \ + { \ + .id = ALIB_DPTC_THERMAL_CONTROL_LIMIT_ID, \ + .value = _thermctllmit, \ + }, \ + { \ + .id = ALIB_DPTC_SUSTAINED_POWER_LIMIT_ID, \ + .value = _sustained, \ + }, \ + { \ + .id = ALIB_DPTC_FAST_PPT_LIMIT_ID, \ + .value = _fast, \ + }, \ + { \ + .id = ALIB_DPTC_SLOW_PPT_LIMIT_ID, \ + .value = _slow, \ + }, \ + }, \ + } /* * @@ -146,9 +179,51 @@ static void root_complex_init(struct device *dev) setup_ioapic((u8 *)GNB_IO_APIC_ADDR, GNB_IOAPIC_ID); } +static void acipgen_dptci(void) +{ + const struct soc_amd_cezanne_config *config = config_of_soc(); + + if (!config->dptc_enable) + return; + + struct dptc_input default_input = DPTC_INPUTS(config->thermctl_limit_degreeC, + config->sustained_power_limit_mW, + config->fast_ppt_limit_mW, + config->slow_ppt_limit_mW); + struct dptc_input tablet_mode_input = DPTC_INPUTS( + config->thermctl_limit_tablet_mode_degreeC, + config->sustained_power_limit_tablet_mode_mW, + config->fast_ppt_limit_tablet_mode_mW, + config->slow_ppt_limit_tablet_mode_mW); + /* Scope (\_SB) */ + acpigen_write_scope("\\_SB"); + + /* Method(DPTC, 0, Serialized) */ + acpigen_write_method_serialized("DPTC", 0); + + /* TODO: The code assumes that if DPTC gets called the following object exists */ + /* If (LEqual ("\_SB.PCI0.LPCB.EC0.TBMD", 1)) */ + acpigen_write_if_lequal_namestr_int("\\_SB.PCI0.LPCB.EC0.TBMD", 1); + + acpigen_dptc_call_alib("TABB", (uint8_t *)(void *)&tablet_mode_input, + sizeof(tablet_mode_input)); + + /* Else */ + acpigen_write_else(); + + acpigen_dptc_call_alib("DEFB", (uint8_t *)(void *)&default_input, + sizeof(default_input)); + + acpigen_pop_len(); /* Else */ + + acpigen_pop_len(); /* Method DPTC */ + acpigen_pop_len(); /* Scope \_SB */ +} + static void root_complex_fill_ssdt(const struct device *device) { acpi_fill_root_complex_tom(device); + acipgen_dptci(); } static const char *gnb_acpi_name(const struct device *dev) -- cgit v1.2.3