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Merge branch 'topic/stm' into for-linus

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This commit is contained in:
Vinod Koul 2018-10-24 09:16:33 +01:00
commit 71f021cf6d
1 changed files with 6 additions and 14 deletions
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20
drivers/dma/stm32-dma.c
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@ -308,20 +308,12 @@ static bool stm32_dma_fifo_threshold_is_allowed(u32 burst, u32 threshold,
static bool stm32_dma_is_burst_possible(u32 buf_len, u32 threshold) static bool stm32_dma_is_burst_possible(u32 buf_len, u32 threshold)
{ {
switch (threshold) { /*
case STM32_DMA_FIFO_THRESHOLD_FULL: * Buffer or period length has to be aligned on FIFO depth.
if (buf_len >= STM32_DMA_MAX_BURST) * Otherwise bytes may be stuck within FIFO at buffer or period
return true; * length.
else */
return false; return ((buf_len % ((threshold + 1) * 4)) == 0);
case STM32_DMA_FIFO_THRESHOLD_HALFFULL:
if (buf_len >= STM32_DMA_MAX_BURST / 2)
return true;
else
return false;
default:
return false;
}
} }
static u32 stm32_dma_get_best_burst(u32 buf_len, u32 max_burst, u32 threshold, static u32 stm32_dma_get_best_burst(u32 buf_len, u32 max_burst, u32 threshold,