kernel.git/drivers/dma/dw/core.c, branch linux-4.0.y

dmaengine: dw: don't handle interrupt when dmaengine is not used

2015-03-05T08:37:48Z

When dma controller is not used by any user and set off, we should disble interrupt handler, at least the interrupt reset part, for some subsystem, e.g. ADSP, may use the dma in its own logic, here reset the interrupt may make this subsystem work abnormally. Signed-off-by: Jie Yang Signed-off-by: Vinod Koul

Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

2015-02-18T16:49:20Z

Pull dmaengine updates from Vinod Koul: "This update brings: - the big cleanup up by Maxime for device control and slave capabilities. This makes the API much cleaner. - new IMG MDC driver by Andrew - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with bunch of fixes on rcar drivers - odd fixes and updates spread over driver" * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits) dmaengine: pl330: add DMA_PAUSE feature dmaengine: pl330: improve pl330_tx_status() function dmaengine: rcar-dmac: Disable channel 0 when using IOMMU dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR dmaengine: rcar-dmac: Fix spinlock issues in interrupt dmaenegine: edma: fix sparse warnings dmaengine: rcar-dmac: Fix uninitialized variable usage dmaengine: shdmac: extend PM methods dmaengine: shdmac: use SET_RUNTIME_PM_OPS() dmaengine: pl330: fix bug that cause start the same descs in cyclic dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers dmaengine: at_xdmac: simplify channel configuration stuff dmaengine: at_xdmac: introduce save_cc field dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel ioat: fail self-test if wait_for_completion times out dmaengine: dw: define DW_DMA_MAX_NR_MASTERS dmaengine: dw: amend description of dma_dev field dmatest: move src_off, dst_off, len inside loop ...

dmaengine: dw: define DW_DMA_MAX_NR_MASTERS

2015-02-05T06:39:44Z

Instead of using magic number in the code the patch provides DW_DMA_MAX_NR_MASTERS constant. While here, restrict the reading of data width array by amount of the actual number of AHB masters. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: dw: provide DMA capabilities

2015-01-13T18:16:00Z

The new DMAEngine requirement is to provide what the DMA controller can do, such as directions, bus widths, and residue granularity. The patch sets those properties for the DesignWare DMA controller driver. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: dw: balance PM runtime calls

2015-01-13T17:37:58Z

In case of PCI driver we will get a warning: dw_dmac_pci 0000:00:18.0: Unbalanced pm_runtime_enable! dw_dmac_pci 0000:00:18.0: DesignWare DMA Controller, 8 channels This happens due to pm_runtime_enable() call from the driver when PM runtime is enabled by core. This patch moves that call to the platform driver where it might make sense. Fixes: bb32baf76e56 (dmaengine: dw: enable runtime PM) Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: dw: Split device_control

2014-12-22T06:58:58Z

Split the device_control callback of the DesignWare DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard Signed-off-by: Vinod Koul

dmaengine: dw: enable runtime PM

2014-11-11T22:44:19Z

On runtime PM aware platforms the DMA have to manage its own power state. This patch enables runtime PM support and applies necessary calls wherever it's needed. Signed-off-by: Andy Shevchenko Acked-by: Vinod Koul Tested-by: Scott Ashcroft Signed-off-by: Rafael J. Wysocki

dmaengine: dw: enable and disable controller when needed

2014-10-15T15:01:05Z

Enable controller automatically whenever first user requires for a channel and disable it when the last user gone. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: dw: always export dw_dma_{en,dis}able

2014-10-15T15:01:04Z

Instead of conditional exporing of dw_dma_suspend() / dw_dma_resume() let's export dw_dma_disable() / dw_dma_enable(). Since dw_dma_shutdown() repeats dw_dma_disable() we may safely remove it at all. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul

dmaengine: dw: introduce dw_dma_on() helper

2014-10-15T15:01:04Z

As an opposite to dw_dma_off() let's introduce dw_dma_on() helper. It will be useful later as well. Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul