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author | Amaury Pouly <amaury.pouly@gmail.com> | 2013-08-20 18:28:40 +0200 |
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committer | Amaury Pouly <amaury.pouly@gmail.com> | 2013-08-21 20:18:36 +0200 |
commit | 6d7734649dc2302f565098becddab0412f8e589e (patch) | |
tree | e0bb0fc978556e63bbcfaeccd0d7964d356ed48e /firmware/target/arm | |
parent | 8d2e4f9b7d33f2d086d6e6a555739ffe0f51ca9c (diff) | |
download | rockbox-6d7734649dc2302f565098becddab0412f8e589e.tar.gz rockbox-6d7734649dc2302f565098becddab0412f8e589e.zip |
imx233: increase max dma transfer size
The old max dma transfer size was set to 2^15 because allowing
values up to 2^16 would result in overflow of the transfer count
in many places. This was a problem with the old register headers
because the macros didn't make sure the result is contained in
the bitmask of the field. The new macro do so 2^16 will actually
end up being 0 which means 2^16 for the hardware. This is kind of
hacky but it works and I prefer that this stays a power of two
because setting it to 2^16-1 would be extremely weird.
Change-Id: I9ce5661c477a79ab52efd5c573948e2353117804
Diffstat (limited to 'firmware/target/arm')
-rw-r--r-- | firmware/target/arm/imx233/dma-imx233.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/firmware/target/arm/imx233/dma-imx233.h b/firmware/target/arm/imx233/dma-imx233.h index a64b8a64d1..5caff740a8 100644 --- a/firmware/target/arm/imx233/dma-imx233.h +++ b/firmware/target/arm/imx233/dma-imx233.h | |||
@@ -142,7 +142,7 @@ struct imx233_dma_info_t | |||
142 | 142 | ||
143 | /* A single descriptor cannot transfer more than 2^16 bytes but because of the | 143 | /* A single descriptor cannot transfer more than 2^16 bytes but because of the |
144 | * weird 0=64KiB, it's safer to restrict to 2^15 */ | 144 | * weird 0=64KiB, it's safer to restrict to 2^15 */ |
145 | #define IMX233_MAX_SINGLE_DMA_XFER_SIZE (1 << 15) | 145 | #define IMX233_MAX_SINGLE_DMA_XFER_SIZE (1 << 16) |
146 | 146 | ||
147 | void imx233_dma_init(void); | 147 | void imx233_dma_init(void); |
148 | void imx233_dma_reset_channel(unsigned chan); | 148 | void imx233_dma_reset_channel(unsigned chan); |