From 4d408ea0282c374a304ce402866cb7b8a56c6b05 Mon Sep 17 00:00:00 2001 From: Trevor Wu Date: Tue, 30 Nov 2021 13:39:04 +0800 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/20211130053905.28470-2-trevor.wu@mediatek.com Signed-off-by: Mark Brown --- sound/soc/mediatek/mt8195/mt8195-afe-pcm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c index 2bb05a8..8a6db24 100644 --- a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c +++ b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #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; -- 2.7.4