diff options
| author | Trevor Wu <trevor.wu@mediatek.com> | 2021-11-30 13:39:04 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-12-06 13:49:16 +0000 |
| commit | 4d408ea0282c374a304ce402866cb7b8a56c6b05 (patch) | |
| tree | 3392c06cbb0466fbc29014e702dbae1d2bb5dce6 /sound/soc/mediatek | |
| parent | 0695ad92fe1a0bb7697eb92c6a145a73c5ab0e24 (diff) | |
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>
Diffstat (limited to 'sound/soc/mediatek')
| -rw-r--r-- | sound/soc/mediatek/mt8195/mt8195-afe-pcm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c index 2bb05a828e8d..8a6db24116e3 100644 --- a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c +++ b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c @@ -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; |