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Subject[patch 01/40] POWERPC: Fix platinumfb framebuffer

-stable review patch. If anyone has any objections, please let us know.

------------------
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Patch 4c2a54b09ba35a409afc34bd331a57a994921664 in mailine.

Current kernels have a non-working platinumfb due to some resource
management issues. This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/video/platinumfb.c | 48 ++++++++++++++++++++++++---------------------
1 file changed, 26 insertions(+), 22 deletions(-)

--- a/drivers/video/platinumfb.c
+++ b/drivers/video/platinumfb.c
@@ -17,6 +17,8 @@
* more details.
*/

+#undef DEBUG
+
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
@@ -535,33 +537,35 @@ static int __devinit platinumfb_probe(st
volatile __u8 *fbuffer;
int bank0, bank1, bank2, bank3, rc;

- printk(KERN_INFO "platinumfb: Found Apple Platinum video hardware\n");
+ dev_info(&odev->dev, "Found Apple Platinum video hardware\n");

info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
- if (info == NULL)
+ if (info == NULL) {
+ dev_err(&odev->dev, "Failed to allocate fbdev !\n");
return -ENOMEM;
+ }
pinfo = info->par;

if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
- printk(KERN_ERR "platinumfb: Can't get resources\n");
- framebuffer_release(info);
- return -ENXIO;
- }
- if (!request_mem_region(pinfo->rsrc_reg.start,
- pinfo->rsrc_reg.start -
- pinfo->rsrc_reg.end + 1,
- "platinumfb registers")) {
+ dev_err(&odev->dev, "Can't get resources\n");
framebuffer_release(info);
return -ENXIO;
}
+ dev_dbg(&odev->dev, " registers : 0x%llx...0x%llx\n",
+ (unsigned long long)pinfo->rsrc_reg.start,
+ (unsigned long long)pinfo->rsrc_reg.end);
+ dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
+ (unsigned long long)pinfo->rsrc_fb.start,
+ (unsigned long long)pinfo->rsrc_fb.end);
+
+ /* Do not try to request register space, they overlap with the
+ * northbridge and that can fail. Only request framebuffer
+ */
if (!request_mem_region(pinfo->rsrc_fb.start,
- pinfo->rsrc_fb.start
- - pinfo->rsrc_fb.end + 1,
+ pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
"platinumfb framebuffer")) {
- release_mem_region(pinfo->rsrc_reg.start,
- pinfo->rsrc_reg.end -
- pinfo->rsrc_reg.start + 1);
+ printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
framebuffer_release(info);
return -ENXIO;
}
@@ -600,7 +604,8 @@ static int __devinit platinumfb_probe(st
bank2 = fbuffer[0x200000] == 0x56;
bank3 = fbuffer[0x300000] == 0x78;
pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
- printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n", (int) (pinfo->total_vram / 1024 / 1024),
+ printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
+ (unsigned int) (pinfo->total_vram / 1024 / 1024),
bank3, bank2, bank1, bank0);

/*
@@ -644,16 +649,15 @@ static int __devexit platinumfb_remove(s
unregister_framebuffer (info);

/* Unmap frame buffer and registers */
+ iounmap(pinfo->frame_buffer);
+ iounmap(pinfo->platinum_regs);
+ iounmap(pinfo->cmap_regs);
+
release_mem_region(pinfo->rsrc_fb.start,
pinfo->rsrc_fb.end -
pinfo->rsrc_fb.start + 1);
- release_mem_region(pinfo->rsrc_reg.start,
- pinfo->rsrc_reg.end -
- pinfo->rsrc_reg.start + 1);
- iounmap(pinfo->frame_buffer);
- iounmap(pinfo->platinum_regs);
+
release_mem_region(pinfo->cmap_regs_phys, 0x1000);
- iounmap(pinfo->cmap_regs);

framebuffer_release(info);

--
-
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