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pch_dma: Fix DMA setting issue
Currently, Direct-Start mode(*) is enabled. Our IOH's devices must not use this mode. This causes unexpected behavior. This patch deletes Direct-Start setting. (*) This mode is used in order for CPU to generate the DMA request. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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1 changed files with 0 additions and 7 deletions
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@ -254,9 +254,6 @@ static bool pdc_is_idle(struct pch_dma_chan *pd_chan)
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static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc)
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{
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struct pch_dma *pd = to_pd(pd_chan->chan.device);
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u32 val;
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if (!pdc_is_idle(pd_chan)) {
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dev_err(chan2dev(&pd_chan->chan),
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"BUG: Attempt to start non-idle channel\n");
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@ -282,10 +279,6 @@ static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc)
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channel_writel(pd_chan, NEXT, desc->txd.phys);
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pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG);
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}
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val = dma_readl(pd, CTL2);
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val |= 1 << (DMA_CTL2_START_SHIFT_BITS + pd_chan->chan.chan_id);
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dma_writel(pd, CTL2, val);
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}
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static void pdc_chain_complete(struct pch_dma_chan *pd_chan,
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