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platform/x86: thinkpad_acpi: do not use PSC mode on Intel platforms

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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
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

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; dytc_mmc_get_available = true;
} }
} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */ } 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"); pr_debug("PSC is supported\n");
} else { } else {
dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n"); dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n");