2012/12/11 Anisse Astier <[email protected]>:
> On Fri, 7 Dec 2012 15:49:21 +0200, Maxim Mikityanskiy <[email protected]>
> wrote :
>
>> Introduced quirk_last_pressed variable that would indicate if
>> last_pressed is used or not. Made it work even if scancode sequence is
>> sparse.
>>
>> Signed-off-by: Maxim Mikityanskiy <[email protected]>
>> ---
>> drivers/platform/x86/msi-wmi.c | 43
>> ++++++++++++++++++++++--------------------
>> 1 file changed, 23 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
>> index 3a60619..273f647 100644
>> --- a/drivers/platform/x86/msi-wmi.c
>> +++ b/drivers/platform/x86/msi-wmi.c
>> @@ -43,8 +43,7 @@ MODULE_ALIAS("wmi:" MSIWMI_BIOS_GUID);
>> MODULE_ALIAS("wmi:" MSIWMI_EVENT_GUID);
>>
>> enum msi_scancodes {
>> - MSI_SCANCODE_BASE = 0xD0,
>> - MSI_KEY_BRIGHTNESSUP = MSI_SCANCODE_BASE,
>> + MSI_KEY_BRIGHTNESSUP = 0xD0,
>> MSI_KEY_BRIGHTNESSDOWN,
>> MSI_KEY_VOLUMEUP,
>> MSI_KEY_VOLUMEDOWN,
>> @@ -59,6 +58,7 @@ static struct key_entry msi_wmi_keymap[] = {
>> { KE_END, 0 }
>> };
>> static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
>> +static bool quirk_last_pressed;
>>
>> static const char *event_wmi_guid;
>>
>> @@ -169,11 +169,15 @@ static void msi_wmi_notify(u32 value, void *context)
>> pr_debug("Eventcode: 0x%x\n", eventcode);
>> key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
>> eventcode);
>> - if (key) {
>> + if (!key) {
>> + pr_info("Unknown key pressed - %x\n", eventcode);
>> + goto msi_wmi_notify_exit;
>> + }
>> + if (quirk_last_pressed) {
>> + size_t key_index = key - msi_wmi_keymap;
> Do you mean key->code - MSI_SCANCODE_BASE ? I'm not sure I understand the
> intent here otherwise.
msi_wmi_keymap is array of 'struct key_entry', i.e. pointer to array's
first item. key is a pointer to some array's item. So 'key -
msi_wmi_keymap' is a difference between pointers, i.e. index of key in
msi_wmi_keymap.
I do pointer arithmetic here because in patch 12 I add some new
scancodes, and holes appear in scancode sequence, so we can't just use
'key->code - MSI_SCANCODE_BASE' to get item index in array.
>
>> ktime_t diff;
>> cur = ktime_get_real();
>> - diff = ktime_sub(cur, last_pressed[key->code -
>> - MSI_SCANCODE_BASE]);
>> + diff = ktime_sub(cur, last_pressed[key_index]);
>> /* Ignore event if the same event happened in a 50 ms
>> timeframe -> Key press may result in 10-20 GPEs */
>> if (ktime_to_us(diff) < 1000 * 50) {
>> @@ -182,21 +186,19 @@ static void msi_wmi_notify(u32 value, void *context)
>> key->code, ktime_to_us(diff));
>> goto msi_wmi_notify_exit;
>> }
>> - last_pressed[key->code - MSI_SCANCODE_BASE] = cur;
>> -
>> - if (key->type == KE_KEY &&
>> - /* Brightness is served via acpi video driver */
>> - (backlight ||
>> - (key->code != MSI_KEY_BRIGHTNESSUP &&
>> - key->code != MSI_KEY_BRIGHTNESSDOWN))) {
>> - pr_debug("Send key: 0x%X - "
>> - "Input layer keycode: %d\n",
>> - key->code, key->keycode);
>> - sparse_keymap_report_entry(msi_wmi_input_dev,
>> - key, 1, true);
>> - }
>> - } else
>> - pr_info("Unknown key pressed - %x\n", eventcode);
>> + last_pressed[key_index] = cur;
>> + }
>> +
>> + if (key->type == KE_KEY &&
>> + /* Brightness is served via acpi video driver */
>> + (backlight ||
>> + (key->code != MSI_KEY_BRIGHTNESSUP &&
>> + key->code != MSI_KEY_BRIGHTNESSDOWN))) {
>> + pr_debug("Send key: 0x%X - Input layer keycode: %d\n",
>> + key->code, key->keycode);
>> + sparse_keymap_report_entry(msi_wmi_input_dev, key, 1,
>> + true);
>> + }
>> } else
>> pr_info("Unknown event received\n");
>>
>> @@ -281,6 +283,7 @@ static int __init msi_wmi_init(void)
>>
>> pr_debug("Event handler installed\n");
>> event_wmi_guid = MSIWMI_EVENT_GUID;
>> + quirk_last_pressed = true;
>> }
>>
>> if (wmi_has_guid(MSIWMI_BIOS_GUID) && !acpi_video_backlight_support())
>> {
--
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