linux-kernel - [PATCH] platform/x86: intel-vbtn: Report switch events when event wakes device

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Message-Id: <20190516215615.261258-1-mathewk@chromium.org>
Date:   Thu, 16 May 2019 15:56:15 -0600
From:   Mathew King <mathewk@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Mathew King <mathewk@...omium.org>,
        AceLan Kao <acelan.kao@...onical.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH] platform/x86: intel-vbtn: Report switch events when event wakes device

When a switch event, such as tablet mode/laptop mode or docked/undocked,
wakes a device make sure that the value of the swich is reported.
Without when a device is put in tablet mode from laptop mode when it is
suspended or vice versa the device will wake up but mode will be
incorrect.

Tested by suspending a device in laptop mode and putting it in tablet
mode, the device resumes and is in tablet mode. When suspending the
device in tablet mode and putting it in laptop mode the device resumes
and is in laptop mode.

Signed-off-by: Mathew King <mathewk@...omium.org>
---
 drivers/platform/x86/intel-vbtn.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
index 06cd7e818ed5..990cc8c20872 100644
--- a/drivers/platform/x86/intel-vbtn.c
+++ b/drivers/platform/x86/intel-vbtn.c
@@ -76,12 +76,15 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
 	struct platform_device *device = context;
 	struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
 	unsigned int val = !(event & 1); /* Even=press, Odd=release */
-	const struct key_entry *ke_rel;
+	const struct key_entry *ke, *ke_rel;
 	bool autorelease;
 
 	if (priv->wakeup_mode) {
-		if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) {
+		ke = sparse_keymap_entry_from_scancode(priv->input_dev, event);
+		if (ke) {
 			pm_wakeup_hard_event(&device->dev);
+			if (ke->type == KE_SW)
+				sparse_keymap_report_event(priv->input_dev, event, val, 0);
 			return;
 		}
 		goto out_unknown;
-- 
2.21.0.1020.gf2820cf01a-goog