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AC97: Highest codec powerdown bits should be write only, fixes #4393

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RichardG867
2024-07-18 17:55:57 -03:00
parent 7a402649cd
commit f266272c60
1 changed files with 2 additions and 2 deletions
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4
src/sound/snd_ac97_codec.c
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@@ -316,7 +316,7 @@ line_gain:
val = (val & i) | (prev & ~i);
/* Update status bits to reflect powerdowns. */
val = (val & ~0x000f) | (~(val >> 8) & 0x000f);
val = (val & ~0x300f) | (~(val >> 8) & 0x000f); /* also clear write-only PR4 and PR5 */
if (val & 0x0800) /* PR3 clears both ANL and REF */
val &= ~0x0004;
break;
@@ -527,7 +527,7 @@ ac97_codec_getattn(void *priv, uint8_t reg, int *l, int *r)
/* Apply full mute and powerdowns. */
int full_mute = (reg < 0x36);
if ((full_mute && (val & AC97_MUTE)) || /* full mute */
(dev->regs[0x26 >> 1] & 0x3e00) || /* DAC powerdown */
(dev->regs[0x26 >> 1] & 0x0e00) || /* DAC powerdown */
((reg == 0x38) && (dev->regs[0x2a >> 1] & AC97_PRJ))) { /* surround DAC powerdown */
*l = 0;
*r = 0;