aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/xilinxfb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/xilinxfb.c')
-rw-r--r--drivers/video/xilinxfb.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index c6174125f52..6ef99b2d13c 100644
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -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 @@ err_regfb:
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);