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Kirill Smelkov
linux
Commits
7fc3b3f9
Commit
7fc3b3f9
authored
Dec 14, 2016
by
Vinod Koul
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Merge branch 'topic/doc' into for-linus
parents
2ef7ff03
397dadf5
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Documentation/dmaengine/client.txt
Documentation/dmaengine/client.txt
+8
-8
Documentation/dmaengine/dmatest.txt
Documentation/dmaengine/dmatest.txt
+5
-5
Documentation/dmaengine/provider.txt
Documentation/dmaengine/provider.txt
+1
-1
Documentation/dmaengine/pxa_dma.txt
Documentation/dmaengine/pxa_dma.txt
+1
-1
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Documentation/dmaengine/client.txt
View file @
7fc3b3f9
Documentation/dmaengine/dmatest.txt
View file @
7fc3b3f9
Documentation/dmaengine/provider.txt
View file @
7fc3b3f9
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@@ -384,7 +384,7 @@ where to put them)
- The descriptor should be prepared for reuse by invoking
dmaengine_desc_set_reuse() which will set DMA_CTRL_REUSE.
- dmaengine_desc_set_reuse() will succeed only when channel support
reusable descriptor as exhibited by capablities
reusable descriptor as exhibited by capab
i
lities
- As a consequence, if a device driver wants to skip the dma_map_sg() and
dma_unmap_sg() in between 2 transfers, because the DMA'd data wasn't used,
it can resubmit the transfer right after its completion.
...
...
Documentation/dmaengine/pxa_dma.txt
View file @
7fc3b3f9
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@@ -29,7 +29,7 @@ Constraints
d) Bandwidth guarantee
The PXA architecture has 4 levels of DMAs priorities : high, normal, low.
The high prorities get twice as much bandwidth as the normal, which get twice
The high pr
i
orities get twice as much bandwidth as the normal, which get twice
as much as the low priorities.
A driver should be able to request a priority, especially the real-time
ones such as pxa_camera with (big) throughputs.
...
...
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