From 57a3487eefa598bdcc15df6dd3991b7ea843fb53 Mon Sep 17 00:00:00 2001 From: Mark Pearson Date: Mon, 27 Jun 2022 14:14:49 -0400 Subject: [PATCH] platform/x86: thinkpad_acpi: do not use PSC mode on Intel platforms PSC platform profile mode is only supported on Linux for AMD platforms. Some older Intel platforms (e.g T490) are advertising it's capability as Windows uses it - but on Linux we should only be using MMC profile for Intel systems. Add a check to prevent it being enabled incorrectly. Signed-off-by: Mark Pearson Link: https://lore.kernel.org/r/20220627181449.3537-1-markpearson@lenovo.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede --- drivers/platform/x86/thinkpad_acpi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 17d503e..09047ca 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -10565,6 +10565,11 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm) dytc_mmc_get_available = true; } } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */ + /* Support for this only works on AMD platforms */ + if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) { + dbg_printk(TPACPI_DBG_INIT, "PSC not support on Intel platforms\n"); + return -ENODEV; + } pr_debug("PSC is supported\n"); } else { dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n"); -- 2.7.4