[PATCH v1 4/4] HID: Intel-thc-hid: Intel-quicki2c: Add output report support

[Even Xu <even.xu@intel.com>]

Add support for HID output reports in the intel-quicki2c driver by
implementing the output_report callback in the HID low-level driver
interface.

This enables proper communication with HID devices that require
output report functionality, such as setting device configuration or
updating device firmware.

Tested-by: Rui Zhang <rui1.zhang@intel.com>
Signed-off-by: Even Xu <even.xu@intel.com>
---
 .../intel-quicki2c/quicki2c-hid.c             |  8 ++++++++
 .../intel-quicki2c/quicki2c-protocol.c        | 19 +++++++++++++++++++
 .../intel-quicki2c/quicki2c-protocol.h        |  1 +
 3 files changed, 28 insertions(+)

diff --git a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-hid.c b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-hid.c
index 5c3ec95bb3fd..580a760b3ffc 100644
--- a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-hid.c
+++ b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-hid.c
@@ -83,6 +83,13 @@ static int quicki2c_hid_power(struct hid_device *hid, int lvl)
 	return 0;
 }
 
+static int quicki2c_hid_output_report(struct hid_device *hid, u8 *buf, size_t count)
+{
+	struct quicki2c_device *qcdev = hid->driver_data;
+
+	return quicki2c_output_report(qcdev, buf, count);
+}
+
 static struct hid_ll_driver quicki2c_hid_ll_driver = {
 	.parse = quicki2c_hid_parse,
 	.start = quicki2c_hid_start,
@@ -91,6 +98,7 @@ static struct hid_ll_driver quicki2c_hid_ll_driver = {
 	.close = quicki2c_hid_close,
 	.power = quicki2c_hid_power,
 	.raw_request = quicki2c_hid_raw_request,
+	.output_report = quicki2c_hid_output_report,
 };
 
 /**
diff --git a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.c b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.c
index a287d9ee09c3..4030337dd6f5 100644
--- a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.c
+++ b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.c
@@ -195,6 +195,25 @@ int quicki2c_set_report(struct quicki2c_device *qcdev, u8 report_type,
 	return buf_len;
 }
 
+int quicki2c_output_report(struct quicki2c_device *qcdev, void *buf, size_t buf_len)
+{
+	size_t len;
+	int ret;
+
+	len = quicki2c_init_write_buf(qcdev, 0, 0, false, buf, buf_len,
+				      qcdev->report_buf, qcdev->report_len);
+	if (!len)
+		return -EINVAL;
+
+	ret = thc_dma_write(qcdev->thc_hw, qcdev->report_buf, len);
+	if (ret) {
+		dev_err(qcdev->dev, "Output Report failed, ret %d\n", ret);
+		return ret;
+	}
+
+	return buf_len;
+}
+
 #define HIDI2C_RESET_TIMEOUT		5
 
 int quicki2c_reset(struct quicki2c_device *qcdev)
diff --git a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.h b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.h
index db70e08c8b1c..6642cefb8a67 100644
--- a/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.h
+++ b/drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-protocol.h
@@ -13,6 +13,7 @@ int quicki2c_get_report(struct quicki2c_device *qcdev, u8 report_type,
 			unsigned int reportnum, void *buf, size_t buf_len);
 int quicki2c_set_report(struct quicki2c_device *qcdev, u8 report_type,
 			unsigned int reportnum, void *buf, size_t buf_len);
+int quicki2c_output_report(struct quicki2c_device *qcdev, void *buf, size_t buf_len);
 int quicki2c_get_device_descriptor(struct quicki2c_device *qcdev);
 int quicki2c_get_report_descriptor(struct quicki2c_device *qcdev);
 int quicki2c_reset(struct quicki2c_device *qcdev);
-- 
2.40.1