Re: Linux-2.6.13-rc7

["Antonino A. Daplas" <adaplas@gmail.com>]

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Sebastian Kaergel wrote:
> On Fri, 26 Aug 2005 00:23:40 +0800
> "Antonino A. Daplas" <adaplas@gmail.com> wrote:
> 
>> Sebastian Kaergel wrote:
>>> On Tue, 23 Aug 2005 22:08:13 -0700 (PDT)
>>> Linus Torvalds <torvalds@osdl.org> wrote:
>>>
>>>> Sylvain Meyer:
>>>>   intelfb: Do not ioremap entire graphics aperture
>> Probably this one. If vram is less than stolen size, intelfb
>> will only ioremap the framebuffer memory, excluding the
>> ringbuffer and the cursor memory.
>>
>> Try booting with video=intelfb:accel:0,nohwcursor:0.  If you get
>> a display, try this patch.
>>
>> CC'ed Sylvain.
>>
>> Signed-off-by: Antonino Daplas <adaplas@pol.net>
>> ---
> <patch snipped>
> 
> Hi,
> thanks for your quick reply, but it did not work. the screen remains
> black when booting with video=intelfb:accel:0,{,no}hwcursor:0

Can you try the patch anyway?

If the patch does not fix your problem, can you revert the patches and
see which is the culprit.  I'm attaching those 2 patches.

Tony




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[-- Attachment #2: intelfb-ioremap.diff --]
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drivers/video/intelfb/intelfbdrv.c: needs update
Index: drivers/video/intelfb/intelfbdrv.c
===================================================================
--- 0582536f492dc10e4849053d19fec93ca72e9bfe/drivers/video/intelfb/intelfbdrv.c  (mode:100644)
+++ uncommitted/drivers/video/intelfb/intelfbdrv.c  (mode:100644)
@@ -579,23 +579,6 @@
 		return -ENODEV;
 	}
 
-	/* Map the fb and MMIO regions */
-	dinfo->aperture.virtual = (u8 __iomem *)ioremap_nocache
-		(dinfo->aperture.physical, dinfo->aperture.size);
-	if (!dinfo->aperture.virtual) {
-		ERR_MSG("Cannot remap FB region.\n");
-		cleanup(dinfo);
-		return -ENODEV;
-	}
-	dinfo->mmio_base =
-		(u8 __iomem *)ioremap_nocache(dinfo->mmio_base_phys,
-					       INTEL_REG_SIZE);
-	if (!dinfo->mmio_base) {
-		ERR_MSG("Cannot remap MMIO region.\n");
-		cleanup(dinfo);
-		return -ENODEV;
-	}
-
 	/* Get the chipset info. */
 	dinfo->pci_chipset = pdev->device;
 
@@ -679,6 +662,26 @@
 	}
 
 	/* Allocate memories (which aren't stolen) */
+	/* Map the fb and MMIO regions */
+	/* ioremap only up to the end of used aperture */
+	dinfo->aperture.virtual = (u8 __iomem *)ioremap_nocache
+		(dinfo->aperture.physical, ((offset + dinfo->fb.offset) << 12)
+		 + dinfo->fb.size);
+	if (!dinfo->aperture.virtual) {
+		ERR_MSG("Cannot remap FB region.\n");
+		cleanup(dinfo);
+		return -ENODEV;
+	}
+
+	dinfo->mmio_base =
+		(u8 __iomem *)ioremap_nocache(dinfo->mmio_base_phys,
+					       INTEL_REG_SIZE);
+	if (!dinfo->mmio_base) {
+		ERR_MSG("Cannot remap MMIO region.\n");
+		cleanup(dinfo);
+		return -ENODEV;
+	}
+
 	if (dinfo->accel) {
 		if (!(dinfo->gtt_ring_mem =
 		      agp_allocate_memory(bridge, dinfo->ring.size >> 12,

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diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -643,8 +643,8 @@ fb_pan_display(struct fb_info *info, str
 int
 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 {
-	int err;
-
+	int err, flags = info->flags;
+	
 	if (var->activate & FB_ACTIVATE_INV_MODE) {
 		struct fb_videomode mode1, mode2;
 		int ret = 0;
@@ -697,7 +697,7 @@ fb_set_var(struct fb_info *info, struct 
 			    !list_empty(&info->modelist))
 				err = fb_add_videomode(&mode, &info->modelist);
 
-			if (!err && info->flags & FBINFO_MISC_USEREVENT) {
+			if (!err && flags & FBINFO_MISC_USEREVENT) {
 				struct fb_event event;
 				int evnt = (var->activate & FB_ACTIVATE_ALL) ?
 					FB_EVENT_MODE_CHANGE_ALL :