[ALSA] maestro3: HP OmniBook HW volume button magic (091bf4dc) · Commits · 戴 / test

Maestro3 driver Some HP OmniBook laptops (500 and 6000 at least) require some GPIO magic before the HW volume buttons work. This patch makes them work mostly. Something is still missing to make them work perfectly. However I have been unable to figure out what exactly. Signed-off-by:

Ville Syrjala <syrjala@sci.fi> Signed-off-by:

Takashi Iwai <tiwai@suse.de>

sound/pci/maestro3.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -2392,6 +2392,18 @@ snd_m3_chip_init(m3_t *chip)
		DISABLE_LEGACY);
		pci_write_config_word(pcidev, PCI_LEGACY_AUDIO_CTRL, w);

		/*
		* Volume buttons on some HP OmniBook laptops (500 and 6000 at least)
		* don't work correctly. This makes them work for the most part.
		* Volume up and down buttons on the laptop side work perfectly.
		* Fn+cursor_up (volme up) works, Fn+cursor_down (volume down) doesn't,
		* Fn+F8 (mute) works acts as volume up.
		*/
		outw(~(GPI_VOL_DOWN\|GPI_VOL_UP), io + GPIO_MASK);
		outw(inw(io + GPIO_DIRECTION) & ~(GPI_VOL_DOWN\|GPI_VOL_UP), io + GPIO_DIRECTION);
		outw((GPI_VOL_DOWN\|GPI_VOL_UP), io + GPIO_DATA);
		outw(0xffff, io + GPIO_MASK);

		pci_read_config_dword(pcidev, PCI_ALLEGRO_CONFIG, &n);
		n &= ~HV_BUTTON_FROM_GD;
		n \|= HV_CTRL_ENABLE \| REDUCED_DEBOUNCE;

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