dmaengine: bcm2835: add slave_sg support to bcm2835-dma

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Add slave_sg support to bcm2835-dma using shared allocation
code for bcm2835_desc and DMA-control blocks already used by
dma_cyclic.

Note that bcm2835_dma_callback had to get modified to support
both modes of operation (cyclic and non-cyclic).

Tested using:
* Hifiberry I2S card (using cyclic DMA)
* fb_st7735r SPI-framebuffer (using slave_sg DMA via spi-bcm2835)
playing BigBuckBunny for audio and video.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

...

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Martin Sperl 2016-03-16 12:25:01 -07:00 • committed by Vinod Koul

parent 4087412258

commit 388cc7a281

1 changed files with 108 additions and 5 deletions

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drivers/dma/bcm2835-dma.c

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