After commit ecc19d17868be9c9f8f00ed928791533c420f3e0 ("dmaengine: Add
a warning for drivers not using the generic slave caps retrieval"),
the Tegra APB DMA driver causes this warning during boot:
WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830
dma_async_device_register+0x294/0x538()
this driver doesn't support generic slave capabilities reporting
Fix by setting the appropriate reporting structure fields that are
passed to dma_async_device_register().
Signed-off-by: Paul Walmsley <p...@pwsan.com>
Cc: Paul Walmsley <pwalms...@nvidia.com>
Cc: Laxman Dewangan <ldewan...@nvidia.com>
Cc: Vinod Koul <vinod.k...@intel.com>
Cc: Dan Williams <dan.j.willi...@intel.com>
Cc: Stephen Warren <swar...@wwwdotorg.org>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: Maxime Ripard <maxime.rip...@free-electrons.com>
Cc: Alexandre Courbot <gnu...@gmail.com>
---
Applies on next-20150105. Boot-tested on Tegra132 Norrin FFD
(with a few unrelated patches not yet in mainline to get the board to
boot)
drivers/dma/tegra20-apb-dma.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 5695fb8..eaf585e 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -1425,6 +1425,21 @@ static int tegra_dma_probe(struct platform_device *pdev)
tegra_dma_free_chan_resources;
tdma->dma_dev.device_prep_slave_sg = tegra_dma_prep_slave_sg;
tdma->dma_dev.device_prep_dma_cyclic = tegra_dma_prep_dma_cyclic;
+ tdma->dma_dev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+ tdma->dma_dev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+ tdma->dma_dev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ /*
+ * XXX The hardware appears to support
+ * DMA_RESIDUE_GRANULARITY_BURST-level reporting, but it's
+ * only used by this driver during tegra_dma_terminate_all()
+ */
+ tdma->dma_dev.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
tdma->dma_dev.device_config = tegra_dma_slave_config;
tdma->dma_dev.device_terminate_all = tegra_dma_terminate_all;
tdma->dma_dev.device_tx_status = tegra_dma_tx_status;
--
2.0.0.GIT
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