[PATCH 2/2] platform/x86: thinkpad_acpi: Add profile force ability

[Mark Pearson]

There has been a lot of confusion around which platform profiles are
supported on various platforms and it would be useful to have a debug
method to be able to override the profile mode that is selected.

I don't expect this to be used in anything other than debugging in
conjunction with Lenovo engineers - but it does give a way to get a
system working whilst we wait for either FW fixes, or a driver fix
to land upstream, if something is wonky in the mode detection logic

Signed-off-by: Mark Pearson <mpearson-lenovo@xxxxxxxxx>
---
 drivers/platform/x86/thinkpad_acpi.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d84a4c7e3c35..2bbb10ac8066 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -10310,6 +10310,7 @@ static atomic_t dytc_ignore_event = ATOMIC_INIT(0);
 static DEFINE_MUTEX(dytc_mutex);
 static int dytc_capabilities;
 static bool dytc_mmc_get_available;
+static int profile_force;
 
 static int convert_dytc_to_profile(int funcmode, int dytcmode,
 		enum platform_profile_option *profile)
@@ -10572,6 +10573,21 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
 	if (err)
 		return err;
 
+	/* Check if user wants to override the profile selection */
+	if (profile_force) {
+		switch (profile_force) {
+		case -1:
+			dytc_capabilities = 0;
+			break;
+		case 1:
+			dytc_capabilities = BIT(DYTC_FC_MMC);
+			break;
+		case 2:
+			dytc_capabilities = BIT(DYTC_FC_PSC);
+			break;
+		}
+		pr_debug("Profile selection forced: 0x%x\n", dytc_capabilities);
+	}
 	if (dytc_capabilities & BIT(DYTC_FC_MMC)) { /* MMC MODE */
 		pr_debug("MMC is supported\n");
 		/*
@@ -11633,6 +11649,9 @@ MODULE_PARM_DESC(uwb_state,
 		 "Initial state of the emulated UWB switch");
 #endif
 
+module_param(profile_force, int, 0444);
+MODULE_PARM_DESC(profile_force, "Force profile mode. -1=off, 1=MMC, 2=PSC");
+
 static void thinkpad_acpi_module_exit(void)
 {
 	struct ibm_struct *ibm, *itmp;
-- 
2.40.0