Re: [HEADS UP] drm merged to -STABLE

[Greg Rivers]

On Wed, 18 Mar 2009, Robert Noland wrote:

On Tue, 2009-03-17 at 18:24 -0500, Greg Rivers wrote:

On Tue, 17 Mar 2009, Robert Noland wrote:

On Tue, 2009-03-17 at 12:20 -0500, Greg Rivers wrote:

On Sat, 10 Jan 2009, Robert Noland wrote:

I just merged drm (Direct Rendering) from HEAD.

       - Support for latest Intel chips
       - Support and fixes for many AMD/ATI chips r500 and below
       - Support AMD/ATI IGP based chips (rs690/rs485)
       - Lots of code cleanups
       - Lots of other fixes and changes since the existing drm
         is 2+ years old

If you are experiencing a "garbled" screen with certain pci/pci-e based
radeons, I have another patch in HEAD that isn't included yet.

I have a workstation with a [Radeon X600 (PCIE)] card.  The X display has
been garbled since these DRM updates went in in January, and remains
garbled with 7.1-STABLE as of yesterday.  As a work-around, I'm running
the up-to-date 7.1-STABLE system (both world and ports) with a
7.1-RELEASE-p2 kernel.  The display is fine with the old kernel and X
works great; I even see dramatically improved performance with the new
Xorg and EXA acceleration.  Your work is much appreciated.

But the garbled display with the recent DRM still plagues me.

[snip]

Could you try the attached patch.

Unfortunately, there is no noticeable difference with this patch.

Also, I'm guessing that this is a PCI based card, right?  Also, it isn't
an integrated model?

Yes, this is a PCIEx16 card in a HP Compaq dc7600 desktop PC, not a
motherboard integrated adapter.

Thanks for your help.  I'm willing to spend some time debugging this;
please let me know if there's more information I can provide or other
tests or patches I can try.

Ok, try this patch... I asked the folks from AMD and they agree that
this shouldn't be needed on an RV370, but we will give it a try... This
is what fixed the garbled display on the IGP chips.

The display is still garbled with this patch too.

I'm curious about why the drm driver calls this card a RV370, while pciconf
and the X server call it a RV380:
        pciconf: "RV380 RADEON X600 Series 265MB"
        X server: "ATI Technologies Inc RV380 [Radeon X600 (PCIE)]"
        drm driver: "ATI Radeon RV370 X600 Pro"

Could it be that the drm driver has the wrong chip set or configuration for
this PCI ID?

--
Greg Rivers
Index: dev/drm/ati_pcigart.c
===================================================================
--- dev/drm/ati_pcigart.c	(revision 189933)
+++ dev/drm/ati_pcigart.c	(working copy)
@@ -83,7 +83,7 @@
 	}
 
 	flags = BUS_DMA_NOWAIT | BUS_DMA_ZERO;
-	if (gart_info->gart_reg_if == DRM_ATI_GART_IGP)
+/*	if (gart_info->gart_reg_if == DRM_ATI_GART_IGP) */
 	    flags |= BUS_DMA_NOCACHE;
 	
 	ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr, flags, &dmah->map);

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