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Commit 28999022 authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh
Browse files

thinkpad-acpi: fix brightness hotkey poll handling 



Handle multiple brightness hotkey presses between two polling cycles.

Signed-off-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
parent 77775838

drivers/platform/x86/thinkpad_acpi.c

+24 −12
Original line number Diff line number Diff line
@@ -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) {

			TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);

		} else {

	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_FNHOME);

			} else {

		if (newn->brightness_level == 0)

			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