Hi Simon,
On Fri, Jun 20, 2014 at 8:59 AM, Simon Glass sjg@google.com wrote:
On 17 June 2014 03:06, Ajay Kumar ajaykumar.rs@samsung.com wrote:
On Exynos5420 and newer versions, the FIMD sysmmus are in "on state" by default. We have to disable them in order to make FIMD DMA work. This patch adds the required framework to exynos_fimd driver, and disables FIMD sysmmu on Exynos5420.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com
Acked-by: Simon Glass sjg@chromium.org Tested-by: Simon Glass sjg@chromium.org
(I assume this is the same device tree binding as Linux?)
Actually, No! Kernel has a generic binding named "samsung,sysmmu-v3.3", and it is common for all sysmmu nodes. There is a seperate IOMMU driver to handle the same. We can port the device probing part from kernel to u-boot, but we would need to add seperate driver(since the name is generic) to handle the same. That driver, even though being generic, will be used only by FIMD sysmmus(that too, just to turn them off).
Ajay
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