From: Mark Pearson markpearson@lenovo.com
[ Upstream commit bce6243f767f7da88aa4674d5d678f9f156eaba9 ]
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 markpearson@lenovo.com Link: https://lore.kernel.org/r/20220627181449.3537-1-markpearson@lenovo.com Reviewed-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/thinkpad_acpi.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -10541,6 +10541,11 @@ static int tpacpi_dytc_profile_init(stru 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");