[PATCH] ASoC: mediatek: Enable 33bit memory address to support 4GB DRAM
From: Takashi Iwai <hidden>
Date: 2016-01-11 09:02:27
Also in:
alsa-devel, linux-mediatek, lkml
On Mon, 11 Jan 2016 09:00:50 +0100, PC Liao wrote:
quoted hunk ↗ jump to hunk
@@ -603,7 +606,10 @@ static int mtk_afe_dais_hw_params(struct snd_pcm_substream *substream, if (ret < 0) return ret; - memif->phys_buf_addr = substream->runtime->dma_addr; + if (sizeof(dma_addr_t) > 4) + msb_at_bit33 = (substream->runtime->dma_addr & 0x100000000) ? 1 : 0;
Better to put a proper suffix for the constant over 32bit. Or use upper_32_bits(). Then sizeof() check can be omitted, as the compiler should be smart enough to know it beforehand. Takashi