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dm: passthru: enable NHLT table for audio passthru

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CAVS audio driver depends on the NHLT table to get topology info.
Enable NHLT table in DM for audio passthrough.
Also increase the size reserved for NHLT in ACPI table from 2048B to 2560B.

Tracked-On: #1284
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Reviewed-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>
This commit is contained in:
Binbin Wu
2018-09-18 11:56:57 +08:00
committed by lijinxia
parent 33acca5d86
commit 53731905d7
2 changed files with 13 additions and 6 deletions
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11
devicemodel/hw/pci/passthrough.c
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@@ -72,11 +72,14 @@
#define PCI_BDF_GPU 0x00000010 /* 00:02.0 */
/* Some audio driver get topology data from ACPI NHLT table, thus need copy host
* NHLT to guest. Default audio driver doesn't require this, so make it off by
* default to avoid unexpected failure.
/* Some audio drivers get topology data from ACPI NHLT table.
* For such drivers, we need to copy the host NHLT table to make it
* available to the Guest OS. Most audio drivers don't need this by
* default, when that's the case setting this macro to 0 will avoid
* unexpected failures.
* The cAVS audio needs this however, so we enable this feature.
*/
#define AUDIO_NHLT_HACK 0
#define AUDIO_NHLT_HACK 1
static int iofd = -1;
static int memfd = -1;