Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b4d6a7268fc754eefb196cabc0ccfa2e97022af2
Commit: b4d6a7268fc754eefb196cabc0ccfa2e97022af2
Parent: 01ba1e9d26fcd29f3ad4f3a5bcf40c0fbc40ee81
Author: Grant Likely <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 11 04:31:51 2007 +1000
Committer: Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 14:05:17 2007 +1000
[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 <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
drivers/video/xilinxfb.c | 71 +++++++++++++++++++++++++++++-----------------
include/linux/xilinxfb.h | 6 ++-
2 files changed, 49 insertions(+), 28 deletions(-)
diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c
index b3b57f4..c617412 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;
diff --git a/include/linux/xilinxfb.h b/include/linux/xilinxfb.h
index 9ad984d..199a1ee 100644
--- a/include/linux/xilinxfb.h
+++ b/include/linux/xilinxfb.h
@@ -15,9 +15,11 @@
/* ML300/403 reference design framebuffer driver platform data struct */
struct xilinxfb_platform_data {
- u32 rotate_screen;
- u32 screen_height_mm;
+ u32 rotate_screen; /* Flag to rotate display 180 degrees */
+ u32 screen_height_mm; /* Physical dimentions of screen in mm */
u32 screen_width_mm;
+ u32 xres, yres; /* resolution of screen in pixels */
+ u32 xvirt, yvirt; /* resolution of memory buffer */
};
#endif /* __XILINXFB_H__ */
-
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