Hi Hans,

On Wed, Apr 24, 2024, at 8:28 AM, Hans de Goede wrote:
> From: Mark Pearson <mpearson-len...@squebb.ca>
>
> Lenovo trackpoints are adding the ability to generate a doubletap event.
> This handles the doubletap event and sends the KEY_PROG4 event to
> userspace. Despite the driver itself not using KEY_PROG1 - KEY_PROG3 this
> still uses KEY_PROG4 because of some keys being remapped to KEY_PROG1 -
> KEY_PROG3 by default by the upstream udev hwdb containing:
>
> evdev:name:ThinkPad Extra Buttons:dmi:bvn*:bvr*:bd*:svnLENOVO*:pn*:*
>  ...
>  KEYBOARD_KEY_17=prog1
>  KEYBOARD_KEY_1a=f20       # Microphone mute button
>  KEYBOARD_KEY_45=bookmarks
>  KEYBOARD_KEY_46=prog2     # Fn + PrtSc, on Windows: Snipping tool
>  KEYBOARD_KEY_4a=prog3     # Fn + Right shift, on Windows: No idea
>
> Signed-off-by: Mark Pearson <mpearson-len...@squebb.ca>
> Signed-off-by: Vishnu Sankar <vishnu...@gmail.com>
> Link: 
> https://lore.kernel.org/r/20240417173124.9953-2-mpearson-len...@squebb.ca
> [hdego...@redhat.com: Adjust for switch to sparse-keymap keymaps]
> Tested-by: Mark Pearson <mpearson-len...@squebb.ca>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
> ---
>  drivers/platform/x86/thinkpad_acpi.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/drivers/platform/x86/thinkpad_acpi.c 
> b/drivers/platform/x86/thinkpad_acpi.c
> index a53b00fecf1a..b6d6466215e1 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -248,6 +248,9 @@ enum tpacpi_hkey_event_t {
> 
>       /* Misc */
>       TP_HKEY_EV_RFKILL_CHANGED       = 0x7000, /* rfkill switch changed */
> +
> +     /* Misc2 */
> +     TP_HKEY_EV_TRACK_DOUBLETAP      = 0x8036, /* trackpoint doubletap */
>  };
> 
>  
> /****************************************************************************
> @@ -3268,6 +3271,7 @@ static const struct key_entry keymap_lenovo[] 
> __initconst = {
>        * after switching to sparse keymap support. The mappings above use 
> translated
>        * scancodes to preserve uAPI compatibility, see 
> tpacpi_input_send_key().
>        */
> +     { KE_KEY, TP_HKEY_EV_TRACK_DOUBLETAP /* 0x8036 */, { KEY_PROG4 } },
>       { KE_END }
>  };
> 
> @@ -3817,6 +3821,17 @@ static bool hotkey_notify_6xxx(const u32 hkey, 
> bool *send_acpi_ev)
>       return true;
>  }
> 
> +static bool hotkey_notify_8xxx(const u32 hkey, bool *send_acpi_ev)
> +{
> +     switch (hkey) {
> +     case TP_HKEY_EV_TRACK_DOUBLETAP:
> +             tpacpi_input_send_key(hkey, send_acpi_ev);
> +             return true;
> +     default:
> +             return false;
> +     }
> +}
> +
>  static void hotkey_notify(struct ibm_struct *ibm, u32 event)
>  {
>       u32 hkey;
> @@ -3893,6 +3908,10 @@ static void hotkey_notify(struct ibm_struct 
> *ibm, u32 event)
>                               known_ev = true;
>                       }
>                       break;
> +             case 8:
> +                     /* 0x8000-0x8FFF: misc2 */
> +                     known_ev = hotkey_notify_8xxx(hkey, &send_acpi_ev);
> +                     break;
>               }
>               if (!known_ev) {
>                       pr_notice("unhandled HKEY event 0x%04x\n", hkey);
> -- 
> 2.44.0

Instead of needing hotkey_notify_8xxx, now we are using the sparse_keymap can 
we just use hotkey_notify_hotkey for case 8? No need to check what the hkey is 
either.

Note - the future patch for the FN+G key (patch 24/24) will also need modifying 
as we'll need to move the check if the doubletap has been disabled for the 
doubletap hkey, but it's two lines so still seems cleaner overall.

I prototyped it on my system, and it worked.

Mark


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