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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 <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>
This commit is contained in:
Mark Pearson 2022-06-27 14:14:49 -04:00 committed by Hans de Goede
parent 42504af775
commit bce6243f76
1 changed files with 5 additions and 0 deletions
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5
drivers/platform/x86/thinkpad_acpi.c
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@ -10541,6 +10541,11 @@ 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");