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dmaengine: acpi: Set up DMA mask based on CSRT

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CSRT has an information about address width, which is supported by
the certain DMA controller.

Use information from CSRT to set up DMA mask for shared controller.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Andy Shevchenko 2019-08-20 16:15:37 +03:00 committed by Vinod Koul
parent d071fd294f
commit a6bc332373
1 changed files with 7 additions and 0 deletions
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7
drivers/dma/acpi-dma.c
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@ -10,6 +10,7 @@
*/
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/kernel.h>
@ -82,6 +83,12 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
if (si->base_request_line == 0 && si->num_handshake_signals == 0)
return 0;
/* Set up DMA mask based on value from CSRT */
ret = dma_coerce_mask_and_coherent(&adev->dev,
DMA_BIT_MASK(si->dma_address_width));
if (ret)
return 0;
adma->base_request_line = si->base_request_line;
adma->end_request_line = si->base_request_line +
si->num_handshake_signals - 1;