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ALSA: hda - add sanity check to force the separate stream tags

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It seems that newer Intel chipsets have more than 15 I/O streams (total).
This patch forces the separate stream tags, when this hardware is detected
to avoid SDxCTL.STRM field overflow and an unexpected behaviour.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jaroslav Kysela 2017-02-15 17:09:43 +01:00 committed by Takashi Iwai
parent e7480b34ad
commit df56c3dbae
1 changed files with 8 additions and 0 deletions
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8
sound/pci/hda/hda_intel.c
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@ -1778,6 +1778,14 @@ static int azx_first_init(struct azx *chip)
chip->playback_index_offset = chip->capture_streams;
chip->num_streams = chip->playback_streams + chip->capture_streams;
/* sanity check for the SDxCTL.STRM field overflow */
if (chip->num_streams > 15 &&
(chip->driver_caps & AZX_DCAPS_SEPARATE_STREAM_TAG) == 0) {
dev_warn(chip->card->dev, "number of I/O streams is %d, "
"forcing separate stream tags", chip->num_streams);
chip->driver_caps |= AZX_DCAPS_SEPARATE_STREAM_TAG;
}
/* initialize streams */
err = azx_init_streams(chip);
if (err < 0)