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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 /arch/arm/mach-pxa
parent5bfb4093be6ac7b6c06c8e6461d85241654acc61 (diff)
[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 'arch/arm/mach-pxa')
-rw-r--r--arch/arm/mach-pxa/include/mach/pxafb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/pxafb.h b/arch/arm/mach-pxa/include/mach/pxafb.h
index 4201a889ff4..6932720ba04 100644
--- a/arch/arm/mach-pxa/include/mach/pxafb.h
+++ b/arch/arm/mach-pxa/include/mach/pxafb.h
@@ -113,6 +113,7 @@ struct pxafb_mach_info {
unsigned int num_modes;
unsigned int lcd_conn;
+ unsigned long video_mem_size;
u_int fixed_modes:1,
cmap_inverse:1,