Lenovo AMD based platforms have been offering platform_profiles but they
are not working correctly. This is because the mode we are using on the
Intel platforms (MMC) is not available on the AMD platforms.
This commit adds checking of the functional capabilities returned by the
BIOS to confirm if MMC is supported or not. Profiles will not be
available if the platform is not MMC capable.
I'm investigating and working on an alternative for AMD platforms but
that is still work-in-progress.
Signed-off-by: Mark Pearson <markpearson@xxxxxxxxxx>
---
drivers/platform/x86/thinkpad_acpi.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 9c632df734bb..42a04e44135b 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10026,6 +10026,9 @@ static struct ibm_struct proxsensor_driver_data = {
#define DYTC_CMD_MMC_GET 8 /* To get current MMC function and mode */
#define DYTC_CMD_RESET 0x1ff /* To reset back to default */
+#define DYTC_CMD_FUNC_CAP 3 /* To get DYTC capabilities */
+#define DYTC_FC_MMC 27 /* MMC Mode supported */
+
#define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
#define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
@@ -10253,6 +10256,16 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
if (dytc_version >= 5) {
dbg_printk(TPACPI_DBG_INIT,
"DYTC version %d: thermal mode available\n", dytc_version);
+
+ /* Check what capabilities are supported. Currently MMC is needed */
+ err = dytc_command(DYTC_CMD_FUNC_CAP, &output);
+ if (err)
+ return err;
+ if (!test_bit(DYTC_FC_MMC, (void *)&output)) {
+ dbg_printk(TPACPI_DBG_INIT, " DYTC MMC mode not supported\n");
+ return 0;
+ }
+
/*
* Check if MMC_GET functionality available
* Version > 6 and return success from MMC_GET command
--
2.34.1
