Re: [PATCH V3] support Thinkpad X1 Carbon 2nd generation's adaptive keyboard

[Shuduo Sang <shuduo.sang@canonical.com>]

On 03/05/2014 01:54 PM, SeongJae Park wrote:
> Hello,
> This is just a trivial comment.
> 
> 
> On Tue, Mar 4, 2014 at 8:13 PM, Shuduo Sang <shuduo.sang@canonical.com> wrote:
>>
>>
>> Submit patch V3 to support Adaptive Keyboard on Thinkpad X1 Carbon 2nd
>> generation according to Tobias's comments.
>>
>> Thanks,
>> Shuduo
>>
>> From 2b8175e69deee661d97d371b2422a9c192fefd52 Mon Sep 17 00:00:00 2001
>> From: Shuduo Sang <sangshuduo@gmail.com>
>> Date: Mon, 3 Mar 2014 14:29:32 +0800
>> Subject: [PATCH] support thinkpad X1 Carbon's adaptive keyboard
>>
>> Thinkpad X1 Carbon's adaptive keyboard has five modes including Home
>> mode, Web browser mode, Web conference mode, Function mode and Lay-flat
>> mode. We support Home mode and Function mode currently.
>>
>> Signed-off-by: Bruce Ma <bruce.ma@canonical.com>
>> Signed-off-by: Shuduo Sang <shuduo.sang@canonical.com>
>> ---
>>  drivers/platform/x86/thinkpad_acpi.c | 102
>> +++++++++++++++++++++++++++++++++++
>>  1 file changed, 102 insertions(+)
>>
>> diff --git a/drivers/platform/x86/thinkpad_acpi.c
>> b/drivers/platform/x86/thinkpad_acpi.c
>> index defb6af..6664dcd 100644
>> --- a/drivers/platform/x86/thinkpad_acpi.c
>> +++ b/drivers/platform/x86/thinkpad_acpi.c
>> @@ -3437,6 +3437,106 @@ err_exit:
>>         return (res < 0)? res : 1;
>>  }
>>
>> +/* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser
>> + * mode, Web conference mode, Function mode and Lay-flat mode.
>> + * We support Home mode and Function mode currently.
>> + *
>> + * Will consider support rest of modes in future.
>> + *
>> + */
>> +enum ADAPTIVE_KEY_MODE {
>> +       HOME_MODE,
>> +       WEB_BROWSER_MODE,
>> +       WEB_CONFERENCE_MODE,
>> +       FUNCTION_MODE,
>> +       LAYFLAT_MODE
>> +};
>> +
>> +int adaptive_keyboard_modes[] = {
>> +       HOME_MODE,
>> +/*     WEB_BROWSER_MODE = 2,
>> +       WEB_CONFERENCE_MODE = 3, */
>> +       FUNCTION_MODE
>> +};
>> +
>> +#define DFR_CHANGE_ROW                 0x101
>> +#define DFR_SHOW_QUICKVIEW_ROW         0x102
>> +
>> +/* press Fn key a while second, it will switch to Function Mode. Then
>> + * release Fn key, previous mode be restored.
>> + */
>> +static bool adaptive_keyboard_mode_is_saved;
>> +static int adaptive_keyboard_prev_mode;
>> +
>> +static int adaptive_keyboard_get_next_mode(int mode)
>> +{
>> +       int i;
>> +       size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1;
>> +
>> +       for (i = 0; i <= max_mode; i++) {
>> +               if (adaptive_keyboard_modes[i] == mode)
>> +                       break;
>> +       }
>> +
>> +       if (i >= max_mode)
>> +               i = 0;
>> +       else
>> +               i++;
>> +
>> +       return adaptive_keyboard_modes[i];
>> +}
>> +
>> +static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
>> +{
>> +       u32 current_mode = 0;
>> +       int new_mode = 0;
>> +
>> +       switch (scancode) {
>> +       case DFR_CHANGE_ROW:
>> +               if (adaptive_keyboard_mode_is_saved) {
>> +                       new_mode = adaptive_keyboard_prev_mode;
>> +                       adaptive_keyboard_mode_is_saved = false;
>> +               } else {
>> +                       if (!acpi_evalf(
>> +                                       hkey_handle, &current_mode,
>> +                                       "GTRW", "dd", 0)) {
>> +                               pr_err("Cannot read adaptive keyboard mode\n");
>> +                               return false;
>> +                       } else {
>> +                               new_mode = adaptive_keyboard_get_next_mode(
>> +                                               current_mode);
>> +                       }
>> +               }
>> +
>> +               if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) {
>> +                       pr_err("Cannot set adaptive keyboard mode\n");
>> +                       return false;
>> +               }
>> +
>> +               return true;
> 
> Isn't the blank line above return statement unnecessary?
> 

Doesn't it look clearly? :)

>> +
>> +       case DFR_SHOW_QUICKVIEW_ROW:
>> +               if (!acpi_evalf(hkey_handle,
>> +                               &adaptive_keyboard_prev_mode,
>> +                               "GTRW", "dd", 0)) {
>> +                       pr_err("Cannot read adaptive keyboard mode\n");
>> +                       return false;
>> +               } else {
>> +                       adaptive_keyboard_mode_is_saved = true;
>> +
>> +                       if (!acpi_evalf(hkey_handle,
>> +                                       NULL, "STRW", "vd", FUNCTION_MODE)) {
>> +                               pr_err("Cannot set adaptive keyboard mode\n");
>> +                               return false;
>> +                       }
>> +               }
>> +               return true;
>> +
>> +       default:
>> +               return false;
>> +       }
>> +}
>> +
>>  static bool hotkey_notify_hotkey(const u32 hkey,
>>                                  bool *send_acpi_ev,
>>                                  bool *ignore_acpi_ev)
>> @@ -3456,6 +3556,8 @@ static bool hotkey_notify_hotkey(const u32 hkey,
>>                         *ignore_acpi_ev = true;
>>                 }
>>                 return true;
>> +       } else {
>> +               return adaptive_keyboard_hotkey_notify_hotkey(scancode);
>>         }
>>         return false;
>>  }
>> --
>> 1.9.0
>>
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