Rather than using the streaming API, use the coherent allocator to provide this memory, thereby eliminating cache flushing of it each time we map and unmap it. This results in a 7.5% increase in transfer speed with a UHS-1 card operating in 3.3v mode at a clock of 49.5MHz. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Markus Pargmann <mpa@pengutronix.de> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net> |
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Makefile |