diff options
| author |   Grant Likely <grant.likely@secretlab.ca> | 2007-10-11 04:31:56 +1000 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2007-10-12 14:05:17 +1000 |
| commit | 287e5d6fcccfa38b953cebe307e1ddfd32363355 (patch) | |
| tree | f06b288f7f2e5a1eecc093ba977141c9035d3534 /drivers | |
| parent | [POWERPC] XilinxFB: Add support for custom screen resolution (diff) | |
| download | linux-dev-287e5d6fcccfa38b953cebe307e1ddfd32363355.tar.xz linux-dev-287e5d6fcccfa38b953cebe307e1ddfd32363355.zip | |
[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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/xilinxfb.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c index c6174125f52b..6ef99b2d13ca 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); |