On Thu, Jan 14, 2016 at 05:14:47PM -0800, Stefan Agner wrote: > On a slightly other topic, I question whether REGCACHE_RBTREE is the > right cache type for the DCU DRM driver. The driver has uses a regmap > area of 1144 32-bit registers, the most space is used by the layer > configuration registers which are 0x40 apart and 0x0-0x20 for each layer > are actually used (hence somewhat above 50%). > Would FLAT be the better cache type? Yes, and if it's a MMIO device the performance of a flat cache is more in line with the device performance.
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