platform/x86: acer-wmi: use an ACPI bitmap to set the platform profile choices

Currently the choices for the platform profile are hardcoded. There is
an ACPI bitmap accessible via WMI that specifies the supported profiles,
use this bitmap to dynamically set the choices for the platform profile.

Link: https://lore.kernel.org/platform-driver-x86/[email protected]/
Signed-off-by: Hridesh MG <[email protected]>
Reviewed-by: Kurt Borja <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Ilpo Järvinen <[email protected]>

Author: hrideshmg

drivers/platform/x86/acer-wmi.c

@@ -33,6 +33,7 @@
 #include <linux/units.h>
 #include <linux/unaligned.h>
 #include <linux/bitfield.h>
+#include <linux/bitmap.h>
 
 MODULE_AUTHOR("Carlos Corbacho");
 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
@@ -127,6 +128,7 @@ enum acer_wmi_predator_v4_oc {
 enum acer_wmi_gaming_misc_setting {
 	ACER_WMID_MISC_SETTING_OC_1			= 0x0005,
 	ACER_WMID_MISC_SETTING_OC_2			= 0x0007,
+	ACER_WMID_MISC_SETTING_SUPPORTED_PROFILES	= 0x000A,
 	ACER_WMID_MISC_SETTING_PLATFORM_PROFILE		= 0x000B,
 };
 
@@ -782,6 +784,9 @@ static bool platform_profile_support;
  */
 static int last_non_turbo_profile;
 
+/* The most performant supported profile */
+static int acer_predator_v4_max_perf;
+
 enum acer_predator_v4_thermal_profile {
 	ACER_PREDATOR_V4_THERMAL_PROFILE_QUIET		= 0x00,
 	ACER_PREDATOR_V4_THERMAL_PROFILE_BALANCED	= 0x01,
@@ -1999,7 +2004,7 @@ acer_predator_v4_platform_profile_set(struct platform_profile_handler *pprof,
 	if (err)
 		return err;
 
-	if (tp != ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO)
+	if (tp != acer_predator_v4_max_perf)
 		last_non_turbo_profile = tp;
 
 	return 0;
@@ -2008,6 +2013,7 @@ acer_predator_v4_platform_profile_set(struct platform_profile_handler *pprof,
 static int acer_platform_profile_setup(struct platform_device *device)
 {
 	if (quirks->predator_v4) {
+		unsigned long supported_profiles;
 		int err;
 
 		platform_profile_handler.name = "acer-wmi";
@@ -2017,16 +2023,46 @@ static int acer_platform_profile_setup(struct platform_device *device)
 		platform_profile_handler.profile_set =
 			acer_predator_v4_platform_profile_set;
 
-		set_bit(PLATFORM_PROFILE_PERFORMANCE,
-			platform_profile_handler.choices);
-		set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE,
-			platform_profile_handler.choices);
-		set_bit(PLATFORM_PROFILE_BALANCED,
-			platform_profile_handler.choices);
-		set_bit(PLATFORM_PROFILE_QUIET,
-			platform_profile_handler.choices);
-		set_bit(PLATFORM_PROFILE_LOW_POWER,
-			platform_profile_handler.choices);
+		err = WMID_gaming_get_misc_setting(ACER_WMID_MISC_SETTING_SUPPORTED_PROFILES,
+						   (u8 *)&supported_profiles);
+		if (err)
+			return err;
+
+		/* Iterate through supported profiles in order of increasing performance */
+		if (test_bit(ACER_PREDATOR_V4_THERMAL_PROFILE_ECO, &supported_profiles)) {
+			set_bit(PLATFORM_PROFILE_LOW_POWER,
+				platform_profile_handler.choices);
+			acer_predator_v4_max_perf =
+				ACER_PREDATOR_V4_THERMAL_PROFILE_ECO;
+		}
+
+		if (test_bit(ACER_PREDATOR_V4_THERMAL_PROFILE_QUIET, &supported_profiles)) {
+			set_bit(PLATFORM_PROFILE_QUIET,
+				platform_profile_handler.choices);
+			acer_predator_v4_max_perf =
+				ACER_PREDATOR_V4_THERMAL_PROFILE_QUIET;
+		}
+
+		if (test_bit(ACER_PREDATOR_V4_THERMAL_PROFILE_BALANCED, &supported_profiles)) {
+			set_bit(PLATFORM_PROFILE_BALANCED,
+				platform_profile_handler.choices);
+			acer_predator_v4_max_perf =
+				ACER_PREDATOR_V4_THERMAL_PROFILE_BALANCED;
+		}
+
+		if (test_bit(ACER_PREDATOR_V4_THERMAL_PROFILE_PERFORMANCE, &supported_profiles)) {
+			set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE,
+				platform_profile_handler.choices);
+			acer_predator_v4_max_perf =
+				ACER_PREDATOR_V4_THERMAL_PROFILE_PERFORMANCE;
+		}
+
+		if (test_bit(ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO, &supported_profiles)) {
+			set_bit(PLATFORM_PROFILE_PERFORMANCE,
+				platform_profile_handler.choices);
+			acer_predator_v4_max_perf =
+				ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO;
+		}
 
 		err = platform_profile_register(&platform_profile_handler);
 		if (err)
@@ -2044,7 +2080,8 @@ static int acer_platform_profile_setup(struct platform_device *device)
 static int acer_thermal_profile_change(void)
 {
 	/*
-	 * This mode key will either cycle through each mode or toggle the turbo profile.
+	 * This mode key will either cycle through each mode or toggle the
+	 * most performant profile.
 	 */
 	if (quirks->predator_v4) {
 		u8 current_tp;
@@ -2058,18 +2095,18 @@ static int acer_thermal_profile_change(void)
 			if (err)
 				return err;
 
-			if (current_tp == ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO)
+			if (current_tp == acer_predator_v4_max_perf)
 				tp = last_non_turbo_profile;
 			else
-				tp = ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO;
+				tp = acer_predator_v4_max_perf;
 
 			err = WMID_gaming_set_misc_setting(
 				ACER_WMID_MISC_SETTING_PLATFORM_PROFILE, tp);
 			if (err)
 				return err;
 
 			/* Store last profile for toggle */
-			if (current_tp != ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO)
+			if (current_tp != acer_predator_v4_max_perf)
 				last_non_turbo_profile = current_tp;
 
 			platform_profile_notify(&platform_profile_handler);