WMAX_METHOD_THERMAL_INFORMATION has a *system description* operation
that outputs a buffer with the following structure:
out[0] -> Number of fans
out[1] -> Number of sensors
out[2] -> 0x00
out[3] -> Number of thermal modes
This is now used by create_thermal_profile to retrieve available thermal
codes instead of brute-forcing every ID.
Tested on an Alienware x15 R1. Verified by checking ACPI tables of
supported models.
Signed-off-by: Kurt Borja <kuurtb@xxxxxxxxx>
---
drivers/platform/x86/dell/alienware-wmi.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
index 36d182f217e2..77465ed9b449 100644
--- a/drivers/platform/x86/dell/alienware-wmi.c
+++ b/drivers/platform/x86/dell/alienware-wmi.c
@@ -68,6 +68,7 @@ enum WMAX_CONTROL_STATES {
};
enum WMAX_THERMAL_INFORMATION_OPERATIONS {
+ WMAX_OPERATION_SYS_DESCRIPTION = 0x02,
WMAX_OPERATION_LIST_IDS = 0x03,
WMAX_OPERATION_CURRENT_PROFILE = 0x0B,
};
@@ -1110,13 +1111,22 @@ static int thermal_profile_set(struct platform_profile_handler *pprof,
static int create_thermal_profile(void)
{
u32 out_data;
+ u8 sys_desc[4];
+ u32 first_mode;
enum wmax_thermal_mode mode;
enum platform_profile_option profile;
int ret;
- for (u8 i = 0x2; i <= 0xD; i++) {
+ ret = wmax_thermal_information(WMAX_OPERATION_SYS_DESCRIPTION,
+ 0, (u32 *) &sys_desc);
+ if (ret < 0)
+ return ret;
+
+ first_mode = sys_desc[0] + sys_desc[1];
+
+ for (u32 i = 0; i < sys_desc[3]; i++) {
ret = wmax_thermal_information(WMAX_OPERATION_LIST_IDS,
- i, &out_data);
+ i + first_mode, &out_data);
if (ret == -EIO)
return ret;
--
2.47.0
