The register DMA4_CDAC needs to be initialized to zero before starting DMA transfer. Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Cc: Govindraj R <govindraj.raja@xxxxxx> Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> Reported-by:S, Venkatraman <svenkatr@xxxxxx> Signed-off-by: Manjunatha GK <manjugk@xxxxxx> --- It was aligned to reset CDAC to zero in omap_start_dma(int lch) instead of creating new API for accessing CDAC register. Discussion thread is at: http://patchwork.kernel.org/patch/83176/ http://patchwork.kernel.org/patch/82948/ arch/arm/plat-omap/dma.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 2ab224c..96741d4 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -936,6 +936,14 @@ void omap_start_dma(int lch) { u32 l; + /* CPC/CDAC register needs to be initialized to zero + * before starting dma transfer. + */ + if (cpu_is_omap15xx()) + dma_write(0, CPC(lch)); + else + dma_write(0, CDAC(lch)); + if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) { int next_lch, cur_lch; char dma_chan_link_map[OMAP_DMA4_LOGICAL_DMA_CH_COUNT]; -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
