[U-Boot] [PATCH] i.MX28: Enable SD DMA only if DCache enabled

[Fabio Estevam]

On Wed, Apr 4, 2012 at 6:51 PM, Marek Vasut <marex at denx.de> wrote:

> +/* Enable DMA transfers only if DCache is on. */
> +#ifndef CONFIG_SYS_DCACHE_OFF
> +#define CONFIG_MXS_MMC_DMA
> +#endif

Your patch makes sense, but I would prefer not to couple
CONFIG_MXS_MMC_DMA with DCACHE support.

Someone may want to enable cache, but still uses MMC driver in PIO mode.

IMHO CONFIG_MXS_MMC_DMA could be defined in configs/board.h when needed.

Yesterday I was running MMC DMA without DCACHE support and it did work
(after the mxs_dma_init changes).