diff options
Diffstat (limited to 'sound/soc/intel/catpt/device.c')
| -rw-r--r-- | sound/soc/intel/catpt/device.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sound/soc/intel/catpt/device.c b/sound/soc/intel/catpt/device.c index 0638aecba40d..0b3f20e384c7 100644 --- a/sound/soc/intel/catpt/device.c +++ b/sound/soc/intel/catpt/device.c @@ -281,7 +281,15 @@ static int catpt_acpi_probe(struct platform_device *pdev) if (IS_ERR(cdev->pci_ba)) return PTR_ERR(cdev->pci_ba); - /* alloc buffer for storing DRAM context during dx transitions */ + /* + * As per design HOST is responsible for preserving firmware's runtime + * context during D0 -> D3 -> D0 transitions. Addresses used for DMA + * to/from HOST memory shall be outside the reserved range of 0xFFFxxxxx. + */ + ret = dma_coerce_mask_and_coherent(cdev->dev, DMA_BIT_MASK(31)); + if (ret) + return ret; + cdev->dxbuf_vaddr = dmam_alloc_coherent(dev, catpt_dram_size(cdev), &cdev->dxbuf_paddr, GFP_KERNEL); if (!cdev->dxbuf_vaddr) |