platform/x86: thinkpad_acpi: Fix platform profiles on T490

commit 0c0cd3e25a5b64b541dd83ba6e032475a9d77432 upstream.

I had incorrectly thought that PSC profiles were not usable on Intel
platforms so had blocked them in the driver initialistion. This broke
platform profiles on the T490.

After discussion with the FW team PSC does work on Intel platforms and
should be allowed.

Note - it's possible this may impact other platforms where it is advertised
but special driver support that only Windows has is needed. But if it does
then they will need fixing via quirks. Please report any issues to me so I
can get them addressed - but I haven't found any problems in testing...yet

Fixes: bce6243f767f ("platform/x86: thinkpad_acpi: do not use PSC mode on Intel platforms")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2177962
Cc: stable@vger.kernel.org
Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://lore.kernel.org/r/20230505132523.214338-1-mpearson-lenovo@squebb.ca
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d1ec31086e9bad33759c76dab42454e0fefe90f9..3462de739f53b5319a4032f0cc793746918a4147 100644 (file)
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10597,11 +10597,6 @@ 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");