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| author | Vinod Koul <vkoul@kernel.org> | 2018-08-17 14:29:01 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-08-17 14:29:01 +0200 |
| commit | 4d44248239510de89d48f22a4f52bd6f2883ad2f (patch) | |
| tree | 6c5f40b30a1720a297a7e80b5f42cc0464572991 /drivers/dma | |
| parent | Merge branch 'topic/ste' into for-linus (diff) | |
| parent | dmaengine: xilinx_dma: Enable VDMA S2MM vertical flip support (diff) | |
| download | linux-4d44248239510de89d48f22a4f52bd6f2883ad2f.tar.xz linux-4d44248239510de89d48f22a4f52bd6f2883ad2f.zip | |
Merge branch 'topic/xilinx' into for-linus
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/xilinx/xilinx_dma.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index 27b523530c4a..c12442312595 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -115,6 +115,9 @@ #define XILINX_VDMA_REG_START_ADDRESS(n) (0x000c + 4 * (n)) #define XILINX_VDMA_REG_START_ADDRESS_64(n) (0x000c + 8 * (n)) +#define XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP 0x00ec +#define XILINX_VDMA_ENABLE_VERTICAL_FLIP BIT(0) + /* HW specific definitions */ #define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x20 @@ -340,6 +343,7 @@ struct xilinx_dma_tx_descriptor { * @start_transfer: Differentiate b/w DMA IP's transfer * @stop_transfer: Differentiate b/w DMA IP's quiesce * @tdest: TDEST value for mcdma + * @has_vflip: S2MM vertical flip */ struct xilinx_dma_chan { struct xilinx_dma_device *xdev; @@ -376,6 +380,7 @@ struct xilinx_dma_chan { void (*start_transfer)(struct xilinx_dma_chan *chan); int (*stop_transfer)(struct xilinx_dma_chan *chan); u16 tdest; + bool has_vflip; }; /** @@ -1092,6 +1097,14 @@ static void xilinx_vdma_start_transfer(struct xilinx_dma_chan *chan) desc->async_tx.phys); /* Configure the hardware using info in the config structure */ + if (chan->has_vflip) { + reg = dma_read(chan, XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP); + reg &= ~XILINX_VDMA_ENABLE_VERTICAL_FLIP; + reg |= config->vflip_en; + dma_write(chan, XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP, + reg); + } + reg = dma_ctrl_read(chan, XILINX_DMA_REG_DMACR); if (config->frm_cnt_en) @@ -2105,6 +2118,8 @@ int xilinx_vdma_channel_set_config(struct dma_chan *dchan, } chan->config.frm_cnt_en = cfg->frm_cnt_en; + chan->config.vflip_en = cfg->vflip_en; + if (cfg->park) chan->config.park_frm = cfg->park_frm; else @@ -2428,6 +2443,13 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev, chan->direction = DMA_DEV_TO_MEM; chan->id = chan_id; chan->tdest = chan_id - xdev->nr_channels; + chan->has_vflip = of_property_read_bool(node, + "xlnx,enable-vert-flip"); + if (chan->has_vflip) { + chan->config.vflip_en = dma_read(chan, + XILINX_VDMA_REG_ENABLE_VERTICAL_FLIP) & + XILINX_VDMA_ENABLE_VERTICAL_FLIP; + } chan->ctrl_offset = XILINX_DMA_S2MM_CTRL_OFFSET; if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) { |