diff options
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index ec7eddf9e52..420cef370b3 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -996,11 +996,17 @@ void omap_start_dma(int lch) l = dma_read(CCR(lch)); /* - * Errata: On ES2.0 BUFFERING disable must be set. - * This will always fail on ES1.0 + * Errata: Inter Frame DMA buffering issue (All OMAP2420 and + * OMAP2430ES1.0): DMA will wrongly buffer elements if packing and + * bursting is enabled. This might result in data gets stalled in + * FIFO at the end of the block. + * Workaround: DMA channels must have BUFFERING_DISABLED bit set to + * guarantee no data will stay in the DMA FIFO in case inter frame + * buffering occurs. */ - if (cpu_is_omap24xx()) - l |= OMAP_DMA_CCR_EN; + if (cpu_is_omap2420() || + (cpu_is_omap2430() && (omap_type() == OMAP2430_REV_ES1_0))) + l |= OMAP_DMA_CCR_BUFFERING_DISABLE; l |= OMAP_DMA_CCR_EN; dma_write(l, CCR(lch)); |