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thinkpad-acpi: fix brightness hotkey poll handling 

Handle multiple brightness hotkey presses between two polling cycles.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
This commit is contained in:
Henrique de Moraes Holschuh 2010-05-16 19:45:36 -03:00
parent 77775838bb
commit 2899902281
1 changed files with 24 additions and 12 deletions
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36
drivers/platform/x86/thinkpad_acpi.c
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@ -2340,6 +2340,21 @@ static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
}
}
void issue_brightnesschange(const unsigned int oldbrt,
const unsigned int newbrt)
{
unsigned int i = oldbrt;
while (i > newbrt) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
i--;
}
while (i < newbrt) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
i++;
}
}
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
@ -2394,19 +2409,16 @@ static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
}
/* handle brightness */
if (oldn->brightness_toggle != newn->brightness_toggle) {
if (oldn->brightness_level < newn->brightness_level) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
} else if (oldn->brightness_level > newn->brightness_level) {
if (oldn->brightness_level != newn->brightness_level) {
issue_brightnesschange(oldn->brightness_level,
newn->brightness_level);
} else if (oldn->brightness_toggle != newn->brightness_toggle) {
/* repeated key presses that didn't change state */
if (newn->brightness_level == 0)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
} else {
/* repeated key presses that didn't change state */
if (newn->brightness_level != 0) {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
} else {
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
}
}
else if (newn->brightness_level >= bright_maxlvl
&& !tp_features.bright_unkfw)
TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
}
#undef TPACPI_COMPARE_KEY