linux-kernel - [PATCH] Hid: Intel-thc-hid: Intel-quicki2c: Enhance driver re-install flow

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Message-Id: <20250806002332.1487447-1-even.xu@intel.com>
Date: Wed,  6 Aug 2025 08:23:32 +0800
From: Even Xu <even.xu@...el.com>
To: jikos@...nel.org,
	bentiss@...nel.org
Cc: srinivas.pandruvada@...ux.intel.com,
	linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Even Xu <even.xu@...el.com>,
	Rui Zhang <rui1.zhang@...el.com>
Subject: [PATCH] Hid: Intel-thc-hid: Intel-quicki2c: Enhance driver re-install flow

After driver module is removed and during re-install stage, if there
is continueous user touching on the screen, it is a risk impacting
THC hardware initialization which causes driver installation failure.

This patch enhances this flow by quiescing the external touch
interrupt after driver is removed which keeps THC hardware
ignore external interrupt during this remove and re-install stage.

Signed-off-by: Even Xu <even.xu@...el.com>
Tested-by: Rui Zhang <rui1.zhang@...el.com>
Fixes: 66b59bfce6d9 ("HID: intel-thc-hid: intel-quicki2c: Complete THC QuickI2C driver")
---
 drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c b/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
index e944a6ccb776..854926b3cfd4 100644
--- a/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
+++ b/drivers/hid/intel-thc-hid/intel-quicki2c/pci-quicki2c.c
@@ -419,6 +419,7 @@ static struct quicki2c_device *quicki2c_dev_init(struct pci_dev *pdev, void __io
  */
 static void quicki2c_dev_deinit(struct quicki2c_device *qcdev)
 {
+	thc_interrupt_quiesce(qcdev->thc_hw, true);
 	thc_interrupt_enable(qcdev->thc_hw, false);
 	thc_ltr_unconfig(qcdev->thc_hw);
 	thc_wot_unconfig(qcdev->thc_hw);
-- 
2.40.1