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Merge pull request #517 from mmaka1/hda-size-fixed 

dma: hda: Free size computation fixed
This commit is contained in:
Liam Girdwood 2018-10-29 16:50:22 +00:00 committed by GitHub
parent e10126306a d7a6b50457
commit 04b1ce4883
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 2 deletions
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4
src/drivers/intel/cavs/hda-dma.c
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@ -162,11 +162,11 @@ static inline uint32_t hda_dma_get_data_size(struct dma *dma, uint32_t chan)
const uint32_t rp = host_dma_reg_read(dma, chan, DGBRP); const uint32_t rp = host_dma_reg_read(dma, chan, DGBRP);
const uint32_t wp = host_dma_reg_read(dma, chan, DGBWP); const uint32_t wp = host_dma_reg_read(dma, chan, DGBWP);
uint32_t ds; int32_t ds;
if (!(cs & DGCS_BNE)) if (!(cs & DGCS_BNE))
return 0; /* buffer is empty */ return 0; /* buffer is empty */
ds = wp - rp; ds = (int32_t)wp - (int32_t)rp;
if (ds <= 0) if (ds <= 0)
ds += bs; ds += bs;