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Date: Wed, 5 Mar 2014 16:06:15 +0900
From: SeongJae Park <sj38.park@...il.com>
To: Shuduo Sang <shuduo.sang@...onical.com>
Cc: Tobias Klauser <tklauser@...tanz.ch>, bjorn@...k.no,
ibm-acpi-devel@...ts.sourceforge.net, linux-acpi@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
ibm-acpi@....eng.br, matthew.garrett@...ula.net,
platform-driver-x86@...r.kernel.org,
Bruce Ma <bruce.ma@...onical.com>
Subject: Re: [PATCH V3] support Thinkpad X1 Carbon 2nd generation's adaptive keyboard
On Wed, Mar 5, 2014 at 3:35 PM, Shuduo Sang <shuduo.sang@...onical.com> wrote:
>
>
> 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@...onical.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@...il.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@...onical.com>
>>> Signed-off-by: Shuduo Sang <shuduo.sang@...onical.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, ¤t_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? :)
Well, I thought it might be unintended blank line because
the return statement in below case doesn't have blank line.
Anyway, I agree if it was your intention.
>
>>> +
>>> + 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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