platform/x86: thinkpad_acpi: Fix profile modes on Intel platforms

My last commit to fix profile mode displays on AMD platforms caused
an issue on Intel platforms - sorry!

In it I was reading the current functional mode (MMC, PSC, AMT) from
the BIOS but didn't account for the fact that on some of our Intel
platforms I use a different API which returns just the profile and not
the functional mode.

This commit fixes it so that on Intel platforms it knows the functional
mode is always MMC.

I also fixed a potential problem that a platform may try to set the mode
for both MMC and PSC - which was incorrect.

Tested on X1 Carbon 9 (Intel) and Z13 (AMD).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=216963
Fixes: fde5f74 ("platform/x86: thinkpad_acpi: Fix profile mode display in AMT mode")
Cc: [email protected]
Reviewed-by: Mario Limonciello <[email protected]>
Signed-off-by: Mark Pearson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Hans de Goede <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>

Author: mrhpearson

drivers/platform/x86/thinkpad_acpi.c

@@ -10496,8 +10496,7 @@ static int dytc_profile_set(struct platform_profile_handler *pprof,
 			if (err)
 				goto unlock;
 		}
-	}
-	if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
+	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
 		err = dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode, 1), &output);
 		if (err)
 			goto unlock;
@@ -10525,14 +10524,16 @@ static void dytc_profile_refresh(void)
 			err = dytc_command(DYTC_CMD_MMC_GET, &output);
 		else
 			err = dytc_cql_command(DYTC_CMD_GET, &output);
-	} else if (dytc_capabilities & BIT(DYTC_FC_PSC))
+		funcmode = DYTC_FUNCTION_MMC;
+	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
 		err = dytc_command(DYTC_CMD_GET, &output);
-
+		/* Check if we are PSC mode, or have AMT enabled */
+		funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
+	}
 	mutex_unlock(&dytc_mutex);
 	if (err)
 		return;
 
-	funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
 	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
 	convert_dytc_to_profile(funcmode, perfmode, &profile);
 	if (profile != dytc_current_profile) {