On Don, 2012-02-16 at 01:05 +0000, acrux wrote:
On Thu, 16 Feb 2012 07:28:10 +1100 Benjamin Herrenschmidt benh@kernel.crashing.org wrote:
On Wed, 2012-02-15 at 08:39 +0100, Michel Dänzer wrote:
Btw, to sum up the list of Power Architecture machines with PCIE that aim to be a desktop/workstation: Apple iMac G5 (iSight), Apple PowerMac Quad G5, YDL Powerstation 2x970MP and Acube Sam460ex . And the last two, on present evidence (my attempts), aren't able to boot up if bootkernel has kms enabled.
Which radeon card, kernel log please ?
See http://lists.freedesktop.org/archives/dri-devel/2012-February/018792.html (start of this thread) and http://lists.freedesktop.org/archives/dri-devel/2012-February/018791.html .
Ok, so for the 460EX, I am not surprised things aren't working with KMS & DRI2... the 460 is not cache coherent, and this is not handled by TTM as far as I can tell.
The second case with no firmware is a bit more surprising, looks like something bad happened on the PCI express bus or the kernel tried to access something that the card rejected (target abort or PCIe equivalent most likely), thus triggering a PLB error . That could be investigated a bit more.
AFAICT in both cases the immediate problem is the PLB error on first access to VRAM, indicating some kind of problem with ioremap_wc() or generally PCIe device memory access.
Anyway after nearly ten years, due a lack in resources, i'm sadly going to suspend the CRUX PPC project and my activism pro free software thus i'm unable to follow these debug. I'll hold on to me the only YDL Powerstation then from the next weeks i'll can only follow trying to help in debug [1] on this specific machine.
[1]http://lists.freedesktop.org/archives/dri-devel/2012-January/018575.html
For that one, I'd try adding some more debugging output to radeon_get_bios() to find out which method it ends up using to retrieve the ROM contents, and why it doesn't look like it's an ATOM BIOS.
Does the same card work in an x86 machine?