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authorEric Miao <eric.miao@marvell.com>2008-12-16 11:54:34 +0800
committerEric Miao <eric.miao@marvell.com>2008-12-29 17:59:16 +0800
commit77e196752bdd76a0c58ab082658d28c6a90fa40e (patch)
tree935fbe8b897d8770fff05254c6c91dc0a8058984 /drivers/video/pxafb.h
parent5bfb4093be6ac7b6c06c8e6461d85241654acc61 (diff)
downloadlinux-linaro-stable-77e196752bdd76a0c58ab082658d28c6a90fa40e.tar.gz
[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.h17
1 files changed, 4 insertions, 13 deletions
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index d8eb93fa03a3..0981938682ef 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;