diff options
Diffstat (limited to 'config/coreboot/next/patches/0013-soc-intel-pmc-Hardcoded-poweroff-after-power-fail.patch')
| -rw-r--r-- | config/coreboot/next/patches/0013-soc-intel-pmc-Hardcoded-poweroff-after-power-fail.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/config/coreboot/next/patches/0013-soc-intel-pmc-Hardcoded-poweroff-after-power-fail.patch b/config/coreboot/next/patches/0013-soc-intel-pmc-Hardcoded-poweroff-after-power-fail.patch new file mode 100644 index 00000000..6ea65c8d --- /dev/null +++ b/config/coreboot/next/patches/0013-soc-intel-pmc-Hardcoded-poweroff-after-power-fail.patch @@ -0,0 +1,82 @@ +From aa13bb380d8286373089de291b62c6070df20573 Mon Sep 17 00:00:00 2001 +From: Leah Rowe <info@minifree.org> +Date: Tue, 31 Dec 2024 01:40:42 +0000 +Subject: [PATCH 1/1] soc/intel/pmc: Hardcoded poweroff after power fail + +Coreboot can set the power state for power on after previous +power failure, based on the option table. On the ThinkPad T480, +we have no nvram and, due to coreboot's design, we therefore +have no option table, so the default setting is enabled. + +In my testing, this seems to be that the system will turn on +after a power failure. If your ThinkPad was previously in a state +where it wouldn't turn on when plugging in the power, it'd be fine. + +If your battery ran out later on, this would be triggered and +your ThinkPad would permanently turn on, when plugging in a charger, +and there is currently no way to configure this behaviour. + +We currently only use the common SoC PMC code on the ThinkPad +T480, T480s and the Dell OptiPlex 3050 Micro, at the time of +this patch, and it is desirable that the system be set to power +off after power fail anyway. + +In some cases, you might want the opposite, for example if you're +running a server. This will be documented on the website, for that +reason. + +Signed-off-by: Leah Rowe <info@minifree.org> +--- + src/soc/intel/common/block/pmc/pmclib.c | 36 +++---------------------- + 1 file changed, 4 insertions(+), 32 deletions(-) + +diff --git a/src/soc/intel/common/block/pmc/pmclib.c b/src/soc/intel/common/block/pmc/pmclib.c +index c51a960854..a836932fe5 100644 +--- a/src/soc/intel/common/block/pmc/pmclib.c ++++ b/src/soc/intel/common/block/pmc/pmclib.c +@@ -760,38 +760,10 @@ void pmc_clear_pmcon_sts(void) + + void pmc_set_power_failure_state(const bool target_on) + { +- const unsigned int state = get_uint_option("power_on_after_fail", +- CONFIG_MAINBOARD_POWER_FAILURE_STATE); +- +- /* +- * On the shutdown path (target_on == false), we only need to +- * update the register for MAINBOARD_POWER_STATE_PREVIOUS. For +- * all other cases, we don't write the register to avoid clob- +- * bering the value set on the boot path. This is necessary, +- * for instance, when we can't access the option backend in SMM. +- */ +- +- switch (state) { +- case MAINBOARD_POWER_STATE_OFF: +- if (!target_on) +- break; +- printk(BIOS_INFO, "Set power off after power failure.\n"); +- pmc_soc_set_afterg3_en(false); +- break; +- case MAINBOARD_POWER_STATE_ON: +- if (!target_on) +- break; +- printk(BIOS_INFO, "Set power on after power failure.\n"); +- pmc_soc_set_afterg3_en(true); +- break; +- case MAINBOARD_POWER_STATE_PREVIOUS: +- printk(BIOS_INFO, "Keep power state after power failure.\n"); +- pmc_soc_set_afterg3_en(target_on); +- break; +- default: +- printk(BIOS_WARNING, "Unknown power-failure state: %d\n", state); +- break; +- } ++ if (!target_on) ++ return; ++ printk(BIOS_INFO, "Set power off after power failure.\n"); ++ pmc_soc_set_afterg3_en(false); + } + + /* This function returns the highest assertion duration of the SLP_Sx assertion widths */ +-- +2.39.5 + |