dmaengine: hdmac: Add memset capabilities

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Just like for the XDMAC, the SoCs that embed the HDMAC don't have any kind
of GPU, and need to accelerate a few framebuffer-related operations through
their DMA controller.

However, unlike the XDMAC, the HDMAC doesn't have the memset capability
built-in. That can be easily emulated though, by doing a transfer with a
fixed address on the variable that holds the value we want to set.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Maxime Ripard 2015-08-24 11:21:15 +02:00 • committed by Vinod Koul

parent 8a4ce226b9

commit 4d112426c3

2 changed files with 124 additions and 3 deletions

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121

drivers/dma/at_hdmac.c

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6

drivers/dma/at_hdmac_regs.h

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