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authorMaxime Ripard <maxime.ripard@free-electrons.com>2015-08-24 12:21:15 +0300
committerVinod Koul <vinod.koul@intel.com>2015-08-26 05:20:21 +0300
commit4d112426c3446d94b9bc56396075524b06913b1c (patch)
treea33a099e243ee40e9b3fe7168294b5b56770d8b1 /drivers/dma/at_hdmac_regs.h
parent8a4ce226b9061fe3ab04f6db34d4b2ae645b9f65 (diff)
downloadlinux-4d112426c3446d94b9bc56396075524b06913b1c.tar.xz
dmaengine: hdmac: Add memset capabilities
Just like for the XDMAC, the SoCs that embed the HDMAC don't have any kind of GPU, and need to accelerate a few framebuffer-related operations through their DMA controller. However, unlike the XDMAC, the HDMAC doesn't have the memset capability built-in. That can be easily emulated though, by doing a transfer with a fixed address on the variable that holds the value we want to set. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/at_hdmac_regs.h')
-rw-r--r--drivers/dma/at_hdmac_regs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h
index bc8d5ebedd19..a2283886dd87 100644
--- a/drivers/dma/at_hdmac_regs.h
+++ b/drivers/dma/at_hdmac_regs.h
@@ -201,6 +201,11 @@ struct at_desc {
size_t boundary;
size_t dst_hole;
size_t src_hole;
+
+ /* Memset temporary buffer */
+ bool memset;
+ dma_addr_t memset_paddr;
+ int *memset_vaddr;
};
static inline struct at_desc *
@@ -331,6 +336,7 @@ struct at_dma {
u8 all_chan_mask;
struct dma_pool *dma_desc_pool;
+ struct dma_pool *memset_pool;
/* AT THE END channels table */
struct at_dma_chan chan[0];
};