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Commit 8263c65f authored by Bastiaan Jacques's avatar Bastiaan Jacques Committed by Jaroslav Kysela
Browse files

[ALSA] via82xx: add support for VIA VT8251 (AC'97) 



Add support for VIA VT8251 AC'97. Includes a workaround which ensures sound
won't stop playing after one second of playback.

Signed-off-by: default avatarBastiaan Jacques <b.jacques@planet.nl>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 5732e7a2

sound/pci/via82xx.c

+12 −2
Original line number Diff line number Diff line
@@ -123,6 +123,7 @@ module_param(enable, bool, 0444); 
#define VIA_REV_8233A		0x40	/* 1 rec, 1 multi-pb, spdf */

#define VIA_REV_8235		0x50	/* 2 rec, 4 pb, 1 multi-pb, spdif */

#define VIA_REV_8237		0x60

#define VIA_REV_8251		0x70



/*

 *  Direct registers
@@ -863,9 +864,16 @@ static snd_pcm_uframes_t snd_via8233_pcm_pointer(struct snd_pcm_substream *subst 
		status = inb(VIADEV_REG(viadev, OFFSET_STATUS));



	if (!(status & VIA_REG_STAT_ACTIVE)) {

		/* An apparent bug in the 8251 is worked around by sending

		 * a REG_CTRL_START. */

		if (chip->revision == VIA_REV_8251)

			snd_via82xx_pcm_trigger(substream,

						SNDRV_PCM_TRIGGER_START);

		else {

			res = 0;

			goto unlock;

		}

	}

	if (count & 0xffffff) {

		idx = count >> 24;

		if (idx >= viadev->tbl_entries) {
@@ -2313,6 +2321,7 @@ static struct via823x_info via823x_cards[] __devinitdata = { 
	{ VIA_REV_8233A, "VIA 8233A", TYPE_VIA8233A },

	{ VIA_REV_8235, "VIA 8235", TYPE_VIA8233 },

	{ VIA_REV_8237, "VIA 8237", TYPE_VIA8233 },

	{ VIA_REV_8251, "VIA 8251", TYPE_VIA8233 },

};



/*
@@ -2342,6 +2351,7 @@ static int __devinit check_dxs_list(struct pci_dev *pci) 
		{ .subvendor = 0x1043, .subdevice = 0x810d, .action = VIA_DXS_SRC }, /* ASUS */

		{ .subvendor = 0x1043, .subdevice = 0x812a, .action = VIA_DXS_SRC    }, /* ASUS A8V Deluxe */ 

		{ .subvendor = 0x1043, .subdevice = 0x8174, .action = VIA_DXS_SRC    }, /* ASUS */

		{ .subvendor = 0x1043, .subdevice = 0x81b9, .action = VIA_DXS_SRC    }, /* ASUS A8V-MX */

		{ .subvendor = 0x1071, .subdevice = 0x8375, .action = VIA_DXS_NO_VRA }, /* Vobis/Yakumo/Mitac notebook */

		{ .subvendor = 0x1071, .subdevice = 0x8399, .action = VIA_DXS_NO_VRA }, /* Umax AB 595T (VIA K8N800A - VT8237) */

		{ .subvendor = 0x10cf, .subdevice = 0x118e, .action = VIA_DXS_ENABLE }, /* FSC laptop */