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alienware-wmi: create_thermal_profile() no longer brute-forces IDs

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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@gmail.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20241111183623.14691-1-kuurtb@gmail.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Kurt Borja 2024-11-11 15:36:23 -03:00 committed by Ilpo Järvinen
parent 01bd181d21
commit bfcda5cbcd
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 12 additions and 2 deletions
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14
drivers/platform/x86/dell/alienware-wmi.c
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@ -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;