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authorGrant Likely <grant.likely@secretlab.ca>2007-10-11 04:31:51 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-12 14:05:17 +1000
commitb4d6a7268fc754eefb196cabc0ccfa2e97022af2 (patch)
tree406af23412b9a984b91804c9ca956c8f3dda0a22 /drivers/video/xilinxfb.c
parent01ba1e9d26fcd29f3ad4f3a5bcf40c0fbc40ee81 (diff)
[POWERPC] XilinxFB: Add support for custom screen resolution
Some custom implementations of the xilinx fb can use resolutions other than 640x480. This patch allows the resolution to be specified in the device tree or the xilinx_platform_data structure. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/video/xilinxfb.c')
-rw-r--r--drivers/video/xilinxfb.c71
1 files changed, 45 insertions, 26 deletions
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index b3b57f4a35a..c6174125f52 100644
--- a/drivers/video/xilinxfb.c
+++ b/drivers/video/xilinxfb.c
@@ -70,12 +70,6 @@
*/
#define BYTES_PER_PIXEL 4
#define BITS_PER_PIXEL (BYTES_PER_PIXEL * 8)
-#define XRES 640
-#define YRES 480
-#define XRES_VIRTUAL 1024
-#define YRES_VIRTUAL YRES
-#define LINE_LENGTH (XRES_VIRTUAL * BYTES_PER_PIXEL)
-#define FB_SIZE (YRES_VIRTUAL * LINE_LENGTH)
#define RED_SHIFT 16
#define GREEN_SHIFT 8
@@ -87,6 +81,10 @@
* Default xilinxfb configuration
*/
static struct xilinxfb_platform_data xilinx_fb_default_pdata = {
+ .xres = 640,
+ .yres = 480,
+ .xvirt = 1024,
+ .yvirt = 480;
};
/*
@@ -96,17 +94,10 @@ static struct fb_fix_screeninfo xilinx_fb_fix = {
.id = "Xilinx",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
- .smem_len = FB_SIZE,
- .line_length = LINE_LENGTH,
.accel = FB_ACCEL_NONE
};
static struct fb_var_screeninfo xilinx_fb_var = {
- .xres = XRES,
- .yres = YRES,
- .xres_virtual = XRES_VIRTUAL,
- .yres_virtual = YRES_VIRTUAL,
-
.bits_per_pixel = BITS_PER_PIXEL,
.red = { RED_SHIFT, 8, 0 },
@@ -217,6 +208,7 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
{
struct xilinxfb_drvdata *drvdata;
int rc;
+ int fbsize = pdata->xvirt * pdata->yvirt * BYTES_PER_PIXEL;
/* Allocate the driver data region */
drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
@@ -243,7 +235,7 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
}
/* Allocate the framebuffer memory */
- drvdata->fb_virt = dma_alloc_coherent(dev, PAGE_ALIGN(FB_SIZE),
+ 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");
@@ -252,7 +244,7 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
}
/* Clear (turn to black) the framebuffer */
- memset_io((void __iomem *)drvdata->fb_virt, 0, FB_SIZE);
+ memset_io((void __iomem *)drvdata->fb_virt, 0, fbsize);
/* Tell the hardware where the frame buffer is */
xilinx_fb_out_be32(drvdata, REG_FB_ADDR, drvdata->fb_phys);
@@ -269,12 +261,18 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
drvdata->info.fbops = &xilinxfb_ops;
drvdata->info.fix = xilinx_fb_fix;
drvdata->info.fix.smem_start = drvdata->fb_phys;
+ drvdata->info.fix.smem_len = fbsize;
+ drvdata->info.fix.line_length = pdata->xvirt * BYTES_PER_PIXEL;
+
drvdata->info.pseudo_palette = drvdata->pseudo_palette;
drvdata->info.flags = FBINFO_DEFAULT;
drvdata->info.var = xilinx_fb_var;
-
- xilinx_fb_var.height = pdata->screen_height_mm;
- xilinx_fb_var.width = pdata->screen_width_mm;
+ drvdata->info.var.height = pdata->screen_height_mm;
+ drvdata->info.var.width = pdata->screen_width_mm;
+ drvdata->info.var.xres = pdata->xres;
+ drvdata->info.var.yres = pdata->yres;
+ drvdata->info.var.xres_virtual = pdata->xvirt;
+ drvdata->info.var.yres_virtual = pdata->yvirt;
/* Allocate a colour map */
rc = fb_alloc_cmap(&drvdata->info.cmap, PALETTE_ENTRIES_NO, 0);
@@ -294,14 +292,15 @@ static int xilinxfb_assign(struct device *dev, unsigned long physaddr,
/* Put a banner in the log (for DEBUG) */
dev_dbg(dev, "regs: phys=%lx, virt=%p\n", physaddr, drvdata->regs);
dev_dbg(dev, "fb: phys=%p, virt=%p, size=%x\n",
- (void*)drvdata->fb_phys, drvdata->fb_virt, FB_SIZE);
+ (void*)drvdata->fb_phys, drvdata->fb_virt, fbsize);
+
return 0; /* success */
err_regfb:
fb_dealloc_cmap(&drvdata->info.cmap);
err_cmap:
- dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
+ 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);
@@ -331,8 +330,8 @@ static int xilinxfb_release(struct device *dev)
fb_dealloc_cmap(&drvdata->info.cmap);
- dma_free_coherent(dev, PAGE_ALIGN(FB_SIZE), drvdata->fb_virt,
- drvdata->fb_phys);
+ 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);
@@ -364,10 +363,18 @@ xilinxfb_platform_probe(struct platform_device *pdev)
}
/* If a pdata structure is provided, then extract the parameters */
- if (pdev->dev.platform_data)
+ pdata = &xilinx_fb_default_pdata;
+ if (pdev->dev.platform_data) {
pdata = pdev->dev.platform_data;
- else
- pdata = &xilinx_fb_default_pdata;
+ if (!pdata->xres)
+ pdata->xres = xilinx_fb_default_pdata.xres;
+ if (!pdata->yres)
+ pdata->yres = xilinx_fb_default_pdata.yres;
+ if (!pdata->xvirt)
+ pdata->xvirt = xilinx_fb_default_pdata.xvirt;
+ if (!pdata->yvirt)
+ pdata->yvirt = xilinx_fb_default_pdata.yvirt;
+ }
return xilinxfb_assign(&pdev->dev, res->start, pdata);
}
@@ -412,12 +419,24 @@ xilinxfb_of_probe(struct of_device *op, const struct of_device_id *match)
return rc;
}
- prop = of_get_property(op->node, "display-number", &size);
+ prop = of_get_property(op->node, "phys-size", &size);
if ((prop) && (size >= sizeof(u32)*2)) {
pdata.screen_width_mm = prop[0];
pdata.screen_height_mm = prop[1];
}
+ prop = of_get_property(op->node, "resolution", &size);
+ if ((prop) && (size >= sizeof(u32)*2)) {
+ pdata.xres = prop[0];
+ pdata.yres = prop[1];
+ }
+
+ prop = of_get_property(op->node, "virtual-resolution", &size);
+ if ((prop) && (size >= sizeof(u32)*2)) {
+ pdata.xvirt = prop[0];
+ pdata.yvirt = prop[1];
+ }
+
if (of_find_property(op->node, "rotate-display", NULL))
pdata.rotate_screen = 1;