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path: root/drivers/video/fbdev/vesafb.c
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Diffstat (limited to 'drivers/video/fbdev/vesafb.c')
-rw-r--r--drivers/video/fbdev/vesafb.c78
1 files changed, 47 insertions, 31 deletions
diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c
index c0edceea0a79..8ab64ae4cad3 100644
--- a/drivers/video/fbdev/vesafb.c
+++ b/drivers/video/fbdev/vesafb.c
@@ -243,6 +243,7 @@ static int vesafb_setup(char *options)
static int vesafb_probe(struct platform_device *dev)
{
+ struct screen_info *si;
struct fb_info *info;
struct vesafb_par *par;
int i, err;
@@ -251,21 +252,33 @@ static int vesafb_probe(struct platform_device *dev)
unsigned int size_total;
char *option = NULL;
+ /*
+ * If we fail probing the device, the kernel might try a different
+ * driver. We get a copy of the attached screen_info, so that we can
+ * modify its values without affecting later drivers.
+ */
+ si = dev_get_platdata(&dev->dev);
+ if (!si)
+ return -ENODEV;
+ si = devm_kmemdup(&dev->dev, si, sizeof(*si), GFP_KERNEL);
+ if (!si)
+ return -ENOMEM;
+
/* ignore error return of fb_get_options */
fb_get_options("vesafb", &option);
vesafb_setup(option);
- if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
+ if (si->orig_video_isVGA != VIDEO_TYPE_VLFB)
return -ENODEV;
- vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
- vesafb_fix.smem_start = screen_info.lfb_base;
- vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
+ vga_compat = (si->capabilities & 2) ? 0 : 1;
+ vesafb_fix.smem_start = si->lfb_base;
+ vesafb_defined.bits_per_pixel = si->lfb_depth;
if (15 == vesafb_defined.bits_per_pixel)
vesafb_defined.bits_per_pixel = 16;
- vesafb_defined.xres = screen_info.lfb_width;
- vesafb_defined.yres = screen_info.lfb_height;
- vesafb_fix.line_length = screen_info.lfb_linelength;
+ vesafb_defined.xres = si->lfb_width;
+ vesafb_defined.yres = si->lfb_height;
+ vesafb_fix.line_length = si->lfb_linelength;
vesafb_fix.visual = (vesafb_defined.bits_per_pixel == 8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
@@ -277,7 +290,7 @@ static int vesafb_probe(struct platform_device *dev)
/* size_total -- all video memory we have. Used for mtrr
* entries, resource allocation and bounds
* checking. */
- size_total = screen_info.lfb_size * 65536;
+ size_total = si->lfb_size * 65536;
if (vram_total)
size_total = vram_total * 1024 * 1024;
if (size_total < size_vmode)
@@ -297,7 +310,7 @@ static int vesafb_probe(struct platform_device *dev)
vesafb_fix.smem_len = size_remap;
#ifndef __i386__
- screen_info.vesapm_seg = 0;
+ si->vesapm_seg = 0;
#endif
if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
@@ -317,23 +330,26 @@ static int vesafb_probe(struct platform_device *dev)
par = info->par;
info->pseudo_palette = par->pseudo_palette;
- par->base = screen_info.lfb_base;
+ par->base = si->lfb_base;
par->size = size_total;
printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
- vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
+ vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel,
+ vesafb_fix.line_length, si->pages);
- if (screen_info.vesapm_seg) {
+ if (si->vesapm_seg) {
printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
- screen_info.vesapm_seg,screen_info.vesapm_off);
+ si->vesapm_seg, si->vesapm_off);
}
- if (screen_info.vesapm_seg < 0xc000)
+ if (si->vesapm_seg < 0xc000)
ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
if (ypan || pmi_setpal) {
+ unsigned long pmi_phys;
unsigned short *pmi_base;
- pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
+ pmi_phys = ((unsigned long)si->vesapm_seg << 4) + si->vesapm_off;
+ pmi_base = (unsigned short *)phys_to_virt(pmi_phys);
pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
@@ -377,14 +393,14 @@ static int vesafb_probe(struct platform_device *dev)
vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
- vesafb_defined.red.offset = screen_info.red_pos;
- vesafb_defined.red.length = screen_info.red_size;
- vesafb_defined.green.offset = screen_info.green_pos;
- vesafb_defined.green.length = screen_info.green_size;
- vesafb_defined.blue.offset = screen_info.blue_pos;
- vesafb_defined.blue.length = screen_info.blue_size;
- vesafb_defined.transp.offset = screen_info.rsvd_pos;
- vesafb_defined.transp.length = screen_info.rsvd_size;
+ vesafb_defined.red.offset = si->red_pos;
+ vesafb_defined.red.length = si->red_size;
+ vesafb_defined.green.offset = si->green_pos;
+ vesafb_defined.green.length = si->green_size;
+ vesafb_defined.blue.offset = si->blue_pos;
+ vesafb_defined.blue.length = si->blue_size;
+ vesafb_defined.transp.offset = si->rsvd_pos;
+ vesafb_defined.transp.length = si->rsvd_size;
if (vesafb_defined.bits_per_pixel <= 8) {
depth = vesafb_defined.green.length;
@@ -399,14 +415,14 @@ static int vesafb_probe(struct platform_device *dev)
(vesafb_defined.bits_per_pixel > 8) ?
"Truecolor" : (vga_compat || pmi_setpal) ?
"Pseudocolor" : "Static Pseudocolor",
- screen_info.rsvd_size,
- screen_info.red_size,
- screen_info.green_size,
- screen_info.blue_size,
- screen_info.rsvd_pos,
- screen_info.red_pos,
- screen_info.green_pos,
- screen_info.blue_pos);
+ si->rsvd_size,
+ si->red_size,
+ si->green_size,
+ si->blue_size,
+ si->rsvd_pos,
+ si->red_pos,
+ si->green_pos,
+ si->blue_pos);
vesafb_fix.ypanstep = ypan ? 1 : 0;
vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;