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Commit 362bc24d authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Takashi Iwai
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sound: oxygen: fix for PI7C9X110 compatibility 



If the card is used with a Pericom PI7C9X110 PCI-E/PCI bridge,
reconfigure the latter's PCI buffering to fix an unknown problem.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 87b61902

sound/pci/oxygen/oxygen_lib.c

+23 −0
Original line number Diff line number Diff line
@@ -307,6 +307,28 @@ static void oxygen_restore_eeprom(struct oxygen *chip, 
	}

}



static void pci_bridge_magic(void)

{

	struct pci_dev *pci = NULL;

	u32 tmp;



	for (;;) {

		/* If there is any Pericom PI7C9X110 PCI-E/PCI bridge ... */

		pci = pci_get_device(0x12d8, 0xe110, pci);

		if (!pci)

			break;

		/*

		 * ... configure its secondary internal arbiter to park to

		 * the secondary port, instead of to the last master.

		 */

		if (!pci_read_config_dword(pci, 0x40, &tmp)) {

			tmp |= 1;

			pci_write_config_dword(pci, 0x40, tmp);

		}

		/* Why?  Try asking C-Media. */

	}

}



static void oxygen_init(struct oxygen *chip)

{

	unsigned int i;
@@ -585,6 +607,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id, 
	snd_card_set_dev(card, &pci->dev);

	card->private_free = oxygen_card_free;



	pci_bridge_magic();

	oxygen_init(chip);

	chip->model.init(chip);