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* reading CORB_READ_POS_RESET as zero fails on some chips (ie nForce).

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28849 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Jérôme Duval
2009-01-06 19:25:34 +00:00
parent 9c566bdabf
commit 74010f9911
1 changed files with 3 additions and 5 deletions
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src/add-ons/kernel/drivers/audio/hda/hda_controller.cpp
+3 -5
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@@ -354,13 +354,11 @@ init_corb_rirb_pos(hda_controller* controller)
controller->stream_positions = (uint32*) controller->stream_positions = (uint32*)
((uint8*)controller->corb + posOffset); ((uint8*)controller->corb + posOffset);
controller->Write16(HDAC_CORB_WRITE_POS, 0);
/* Reset CORB read pointer */ /* Reset CORB read pointer */
/* NOTE: See HDA011 for corrected procedure! */
controller->Write16(HDAC_CORB_READ_POS, CORB_READ_POS_RESET); controller->Write16(HDAC_CORB_READ_POS, CORB_READ_POS_RESET);
do { /* Reading CORB_READ_POS_RESET as zero fails on some chips.
spin(10); We reset the bit here. */
} while ((controller->Read16(HDAC_CORB_READ_POS)
& CORB_READ_POS_RESET) == 0);
controller->Write16(HDAC_CORB_READ_POS, 0); controller->Write16(HDAC_CORB_READ_POS, 0);
/* Reset RIRB write pointer */ /* Reset RIRB write pointer */