From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ondrej Zary Subject: [PATCH] snd-maestro3: Fix Allegro mute until master volume/mute is touched Date: Sun, 1 Nov 2015 20:53:14 +0100 Message-ID: <1446407594-2382-1-git-send-email-linux@rainbow-software.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from gsystem.sk (ns.gsystem.sk [62.176.172.50]) by alsa0.perex.cz (Postfix) with ESMTP id 1BBB9260513 for ; Sun, 1 Nov 2015 20:53:26 +0100 (CET) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: Takashi Iwai , Kernel development list List-Id: alsa-devel@alsa-project.org ESS Allegro (marked ES1989S), [125d:1988] (rev 10) is mute after loading snd-maestro3 and running alsactl restore. Touching master volume or mute makes it work. Looks like a bug in the AC'97 codec integrated into the chip. Write AC97_MASTER register twice to work-around the problem. Signed-off-by: Ondrej Zary --- sound/pci/maestro3.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c index 965d5c6..17ae926 100644 --- a/sound/pci/maestro3.c +++ b/sound/pci/maestro3.c @@ -1929,6 +1929,16 @@ snd_m3_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) return; snd_m3_outw(chip, val, CODEC_DATA); snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND); + /* + * Workaround for buggy ES1988 integrated AC'97 codec. It remains silent + * until the MASTER volume or mute is touched (alsactl restore does not + * work). + */ + if (ac97->id == 0x45838308 && reg == AC97_MASTER) { + snd_m3_ac97_wait(chip); + snd_m3_outw(chip, val, CODEC_DATA); + snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND); + } } -- Ondrej Zary