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ASoC: mediatek: mt8195: support reserved memory assignment 

For security purpose, restrict the memory assess region of AFE memif.
The specified memory region should be assigned from DTS.

Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Link: https://lore.kernel.org/r/20211130053905.28470-2-trevor.wu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Trevor Wu 2021-11-30 13:39:04 +08:00 committed by Mark Brown
parent 0695ad92fe
commit 4d408ea028
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GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 0 deletions
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7
sound/soc/mediatek/mt8195/mt8195-afe-pcm.c
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@ -14,6 +14,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/pm_runtime.h>
#include "mt8195-afe-common.h"
#include "mt8195-afe-clk.h"
@ -3061,6 +3062,12 @@ static int mt8195_afe_pcm_dev_probe(struct platform_device *pdev)
int i, irq_id, ret;
struct snd_soc_component *component;
ret = of_reserved_mem_device_init(dev);
if (ret) {
dev_err(dev, "failed to assign memory region: %d\n", ret);
return ret;
}
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(33));
if (ret)
return ret;