[PATCH v3] platform/x86: ideapad-laptop: switch platform profiles using thermal management key

[Gergo Koteles <soyer@irl.hu>]

Ideapad laptops have thermal management or performance mode switch key
(Fn + Q). They report KEY_PROG4.

If supported, cycle platform profiles instead.

Tested on Yoga7 14ARB7.

Signed-off-by: Gergo Koteles <soyer@irl.hu>
---
Changes in v3:
 - add dytc_profile_cycle function
Changes in v2:
 - only switch platform profiles if supported, otherwise keep the 
   behavior.

[2]: https://lore.kernel.org/all/797884d8cab030d3a2b656dba67f3c423cc58be7.1712174794.git.soyer@irl.hu/
[1]: https://lore.kernel.org/all/85254ce8e87570c05e7f04d6507701bef954ed75.1712149429.git.soyer@irl.hu/
---
 drivers/platform/x86/ideapad-laptop.c | 31 +++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index 901849810ce2..c7ea3ed14aba 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -858,6 +858,30 @@ static void dytc_profile_refresh(struct ideapad_private *priv)
 	}
 }
 
+static void dytc_profile_cycle(struct ideapad_private *priv)
+{
+	switch (priv->dytc->current_profile) {
+	case PLATFORM_PROFILE_LOW_POWER:
+		dytc_profile_set(&priv->dytc->pprof,
+				 PLATFORM_PROFILE_BALANCED);
+		break;
+	case PLATFORM_PROFILE_BALANCED:
+		dytc_profile_set(&priv->dytc->pprof,
+				 PLATFORM_PROFILE_PERFORMANCE);
+		break;
+	case PLATFORM_PROFILE_PERFORMANCE:
+		dytc_profile_set(&priv->dytc->pprof,
+				 PLATFORM_PROFILE_LOW_POWER);
+		break;
+	default:
+		dev_warn(&priv->platform_device->dev,
+			 "Unexpected platform profile %d",
+			 priv->dytc->current_profile);
+	}
+	/* Notify user space the profile changed */
+	platform_profile_notify();
+}
+
 static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
 	{
 		/* Ideapad 5 Pro 16ACH6 */
@@ -1181,8 +1205,11 @@ static void ideapad_check_special_buttons(struct ideapad_private *priv)
 		switch (bit) {
 		case 6:	/* Z570 */
 		case 0:	/* Z580 */
-			/* Thermal Management button */
-			ideapad_input_report(priv, 65);
+			/* Thermal Management / Performance Mode button */
+			if (priv->dytc)
+				dytc_profile_cycle(priv);
+			else
+				ideapad_input_report(priv, 65);
 			break;
 		case 1:
 			/* OneKey Theater button */

base-commit: 39cd87c4eb2b893354f3b850f916353f2658ae6f
-- 
2.44.0