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| author | Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> | 2011-05-09 16:09:37 +0900 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2011-05-09 17:12:23 +0530 |
| commit | 60092d0bde4c8741198da4a69b693d3709385bf1 (patch) | |
| tree | 0f15316b472b4ab1abbe4e425ae049d208a10d9f /drivers/dma | |
| parent | 08645fdc7bab4564f7dfd07525da8a1761f8f106 (diff) | |
| download | kernel_samsung_smdk4412-60092d0bde4c8741198da4a69b693d3709385bf1.zip kernel_samsung_smdk4412-60092d0bde4c8741198da4a69b693d3709385bf1.tar.gz kernel_samsung_smdk4412-60092d0bde4c8741198da4a69b693d3709385bf1.tar.bz2 | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/pch_dma.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c index afd6fba0..4e46672 100644 --- a/drivers/dma/pch_dma.c +++ b/drivers/dma/pch_dma.c @@ -254,9 +254,6 @@ static bool pdc_is_idle(struct pch_dma_chan *pd_chan) static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc) { - struct pch_dma *pd = to_pd(pd_chan->chan.device); - u32 val; - if (!pdc_is_idle(pd_chan)) { dev_err(chan2dev(&pd_chan->chan), "BUG: Attempt to start non-idle channel\n"); @@ -282,10 +279,6 @@ static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc) channel_writel(pd_chan, NEXT, desc->txd.phys); pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG); } - - val = dma_readl(pd, CTL2); - val |= 1 << (DMA_CTL2_START_SHIFT_BITS + pd_chan->chan.chan_id); - dma_writel(pd, CTL2, val); } static void pdc_chain_complete(struct pch_dma_chan *pd_chan, |