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[POWERPC] XilinxFB: Allow fixed framebuffer base address 

Allow a fixed framebuffer address to be assigned to the framebuffer device
instead of allocating the framebuffer from the consistent memory pool.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely 2007-10-11 04:31:56 +10:00 committed by Paul Mackerras
parent b4d6a7268f
commit 287e5d6fcc
2 changed files with 21 additions and 6 deletions
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22
drivers/video/xilinxfb.c
View File

@ -117,6 +117,7 @@ struct xilinxfb_drvdata {
void *fb_virt; /* virt. address of the frame buffer */
dma_addr_t fb_phys; /* phys. address of the frame buffer */
int fb_alloced; /* Flag, was the fb memory alloced? */
u32 reg_ctrl_default;
@ -235,8 +236,15 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
}
/* Allocate the framebuffer memory */
drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(fbsize),
&drvdata->fb_phys, GFP_KERNEL);
if (pdata->fb_phys) {
drvdata->fb_phys = pdata->fb_phys;
drvdata->fb_virt = ioremap(pdata->fb_phys, fbsize);
} else {
drvdata->fb_alloced = 1;
drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(fbsize),
&drvdata->fb_phys, GFP_KERNEL);
}
if (!drvdata->fb_virt) {
dev_err(dev, "Could not allocate frame buffer memory\n");
rc = -ENOMEM;
@ -300,8 +308,9 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
fb_dealloc_cmap(&drvdata->info.cmap);
err_cmap:
dma_free_coherent(dev, PAGE_ALIGN(fbsize), drvdata->fb_virt,
drvdata->fb_phys);
if (drvdata->fb_alloced)
dma_free_coherent(dev, PAGE_ALIGN(fbsize), drvdata->fb_virt,
drvdata->fb_phys);
/* Turn off the display */
xilinx_fb_out_be32(drvdata, REG_CTRL, 0);
@ -330,8 +339,9 @@ static int xilinxfb_release(struct device *dev)
fb_dealloc_cmap(&drvdata->info.cmap);
dma_free_coherent(dev, PAGE_ALIGN(drvdata->info.fix.smem_len),
drvdata->fb_virt, drvdata->fb_phys);
if (drvdata->fb_alloced)
dma_free_coherent(dev, PAGE_ALIGN(drvdata->info.fix.smem_len),
drvdata->fb_virt, drvdata->fb_phys);
/* Turn off the display */
xilinx_fb_out_be32(drvdata, REG_CTRL, 0);

5
include/linux/xilinxfb.h
View File

@ -20,6 +20,11 @@ struct xilinxfb_platform_data {
u32 screen_width_mm;
u32 xres, yres; /* resolution of screen in pixels */
u32 xvirt, yvirt; /* resolution of memory buffer */
/* Physical address of framebuffer memory; If non-zero, driver
* will use provided memory address instead of allocating one from
* the consistent pool. */
u32 fb_phys;
};
#endif /* __XILINXFB_H__ */