Allow the transfer size to vary in each DMA request, rather than assuming all requests to be the same size as the first request made.
Signed-off-by: Laxman Dewangan <[email protected]> --- arch/arm/mach-tegra/dma.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c index abea4f6..81a7459 100644 --- a/arch/arm/mach-tegra/dma.c +++ b/arch/arm/mach-tegra/dma.c @@ -423,6 +423,7 @@ static void tegra_dma_update_hw_partial(struct tegra_dma_channel *ch, { u32 apb_ptr; u32 ahb_ptr; + u32 csr; if (req->to_memory) { apb_ptr = req->source_addr; @@ -434,6 +435,15 @@ static void tegra_dma_update_hw_partial(struct tegra_dma_channel *ch, writel(apb_ptr, ch->addr + APB_DMA_CHAN_APB_PTR); writel(ahb_ptr, ch->addr + APB_DMA_CHAN_AHB_PTR); + if (ch->mode & TEGRA_DMA_MODE_CONTINOUS) + ch->req_transfer_count = (req->size >> 3) - 1; + else + ch->req_transfer_count = (req->size >> 2) - 1; + csr = readl(ch->addr + APB_DMA_CHAN_CSR); + csr &= ~CSR_WCOUNT_MASK; + csr |= ch->req_transfer_count << CSR_WCOUNT_SHIFT; + writel(csr, ch->addr + APB_DMA_CHAN_CSR); + req->status = TEGRA_DMA_REQ_INFLIGHT; return; } -- 1.7.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
