On Fri, Nov 30, 2018 at 7:18 PM Benjamin Tissoires
[off-list ref] wrote:

On Fri, Nov 30, 2018 at 7:46 AM Chris Chiu [off-list ref] wrote:

quoted

The ASUS laptops start to support the airplane mode radio management
to replace the original machanism of airplane mode toggle hotkey.
On the ASUS P5440FF, it presents as a HID device connecting via
I2C, name i2c-AMPD0001. When pressing hotkey, the Embedded Controller
send hid report up via I2C and switch the airplane mode indicator
LED based on the status.

However, it's not working because it fails to be identified as a
hidinput device. It fails in hidinput_connect() due to the macro
IS_INPUT_APPLICATION doesn't identify HID_GD_WIRELESS_RADIO_CTLS
as a legit application code.

It's easy to add the HID I2C vendor and product id to the quirk
list and apply HID_QUIRK_HIDINPUT_FORCE to make it work. But it
can be more generic to support such kind of application on PC.

Sounds good, but while you are at it, can you please:
- fix the kbuild warning
- rewrite the whole line to use macros,
- make the macro prettier by inserting new lines were required
- and define the missing macro:
  0x000d0006 -> HID_DG_WHITEBOARD

Maybe we should keep the ranges definitions with raw values and put a
comment on the side with the names.

Cheers,
Benjamin

Hi Bejamin,
    Thanks for your comment, I've submitted other patches which may
fulfill your suggestion.
https://lore.kernel.org/patchwork/patch/1020373/
https://lore.kernel.org/patchwork/patch/1020374/

     Please help me review and correct me if there's any modification
required. Thanks & Regards.

Chris

quoted

Signed-off-by: Chris Chiu <redacted>
---
 include/linux/hid.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/hid.h b/include/linux/hid.h
index d44a78362942..f4805f605fed 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h

@@ -836,7 +836,7 @@ static inline bool hid_is_using_ll_driver(struct hid_device *hdev,

 /* Applications from HID Usage Tables 4/8/99 Version 1.1 */
 /* We ignore a few input applications that are not widely used */
-#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
+#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || || (a == 0x0001000c) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))

 /* HID core API */

--

2.11.0