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author | Eric Miao <eric.miao@marvell.com> | 2008-12-16 11:54:34 +0800 |
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committer | Eric Miao <eric.miao@marvell.com> | 2008-12-29 17:59:16 +0800 |
commit | 77e196752bdd76a0c58ab082658d28c6a90fa40e (patch) | |
tree | 935fbe8b897d8770fff05254c6c91dc0a8058984 /drivers/video/pxafb.h | |
parent | 5bfb4093be6ac7b6c06c8e6461d85241654acc61 (diff) | |
download | linux-3.10-77e196752bdd76a0c58ab082658d28c6a90fa40e.tar.gz linux-3.10-77e196752bdd76a0c58ab082658d28c6a90fa40e.tar.bz2 linux-3.10-77e196752bdd76a0c58ab082658d28c6a90fa40e.zip |
[ARM] pxafb: allow video memory size to be configurable
The amount of video memory size is decided according to the following
order:
1. <xres> x <yres> x <bits_per_pixel> by default, which is the backward
compatible way
2. size specified in platform data
3. size specified in module parameter 'options' string or specified in
kernel boot command line (see updated Documentation/fb/pxafb.txt)
And now since the memory is allocated from system memory, the pxafb_mmap
can be removed and the default fb_mmap() should be working all right.
Also, since we now have introduced the 'struct pxafb_dma_buff' for DMA
descriptors and palettes, the allocation can be separated cleanly.
NOTE: the LCD DMA actually supports chained transfer (i.e. page-based
transfers), to simplify the logic and keep the performance (with less
TLB misses when accessing from memory mapped user space), the memory
is allocated by alloc_pages_*() to ensures it's physical contiguous.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Eric Miao <ycmiao@ycmiao-hp520.(none)>
Diffstat (limited to 'drivers/video/pxafb.h')
-rw-r--r-- | drivers/video/pxafb.h | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h index d8eb93fa03a..0981938682e 100644 --- a/drivers/video/pxafb.h +++ b/drivers/video/pxafb.h @@ -69,24 +69,15 @@ struct pxafb_info { void __iomem *mmio_base; struct pxafb_dma_buff *dma_buff; + size_t dma_buff_size; dma_addr_t dma_buff_phys; dma_addr_t fdadr[DMA_MAX]; - /* - * These are the addresses we mapped - * the framebuffer memory region to. - */ - /* raw memory addresses */ - dma_addr_t map_dma; /* physical */ - u_char * map_cpu; /* virtual */ - u_int map_size; - - /* addresses of pieces placed in raw buffer */ - u_char * screen_cpu; /* virtual address of frame buffer */ - dma_addr_t screen_dma; /* physical address of frame buffer */ + void __iomem *video_mem; /* virtual address of frame buffer */ + unsigned long video_mem_phys; /* physical address of frame buffer */ + size_t video_mem_size; /* size of the frame buffer */ u16 * palette_cpu; /* virtual address of palette memory */ u_int palette_size; - ssize_t video_offset; u_int lccr0; u_int lccr3; |