linux-kernel - [PATCH] wss_lib: Fix resume on Yamaha OPL3-SAx

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Message-Id: <201207160830.18826.linux@rainbow-software.org>
Date:	Mon, 16 Jul 2012 08:30:18 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Jaroslav Kysela <perex@...ex.cz>
Cc:	alsa-devel@...a-project.org,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: [PATCH] wss_lib: Fix resume on Yamaha OPL3-SAx

Yamaha OPL3-SAx chips don't resume properly when playback is running -
garbage is played after resume. Restoring the CS4231_PLAYBK_FORMAT register
last fixes the problem.

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

--- a/sound/isa/wss/wss_lib.c
+++ b/sound/isa/wss/wss_lib.c
@@ -1656,6 +1656,10 @@ static void snd_wss_resume(struct snd_wss *chip)
 			break;
 		}
 	}
+	/* Yamaha needs this to resume properly */
+	if (chip->hardware == WSS_HW_OPL3SA2)
+		snd_wss_out(chip, CS4231_PLAYBK_FORMAT,
+			    chip->image[CS4231_PLAYBK_FORMAT]);
 	spin_unlock_irqrestore(&chip->reg_lock, flags);
 #if 1
 	snd_wss_mce_down(chip);

-- 
Ondrej Zary
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