kernel.git/drivers/gpu/drm/radeon/si.c, branch linux-3.9.y

radeon: Fix system hang issue when using KMS with older cards

2013-06-13T17:49:28Z

commit e49f3959a96dc279860af7e86e6dbcfda50580a5 upstream. The current radeon driver initialization routines, when using KMS, are written so that the IRQ installation routine is called before initializing the WB buffer and the CP rings. With some ASICs, though, the IRQ routine tries to access the GFX_INDEX ring causing a call to RREG32 with the value of -1 in radeon_fence_read. This, in turn causes the system to completely hang with some cards, requiring a hard reset. A call stack that can cause such a hang looks like this (using rv515 ASIC for the example here): * rv515_init (rv515.c) * radeon_irq_kms_init (radeon_irq_kms.c) * drm_irq_install (drm_irq.c) * radeon_driver_irq_preinstall_kms (radeon_irq_kms.c) * rs600_irq_process (rs600.c) * radeon_fence_process - due to SW interrupt (radeon_fence.c) * radeon_fence_read (radeon_fence.c) * hang due to RREG32(-1) The patch moves the IRQ installation to the card startup routine, after the ring has been initialized, but before the IRQ has been set. This fixes the issue, but requires a check to see if the IRQ is already installed, as is the case in the system resume codepath. I have tested the patch on three machines using the rv515, the rv770 and the evergreen ASIC. They worked without issues. This seems to be a known issue and has been reported on several bug tracking sites by various distributions (see links below). Most of reports recommend booting the system with KMS disabled and then enabling KMS by reloading the radeon module. For some reason, this was indeed a usable workaround, however, UMS is now deprecated and disabled by default. Bug reports: https://bugzilla.redhat.com/show_bug.cgi?id=845745 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561789 https://bbs.archlinux.org/viewtopic.php?id=156964 Signed-off-by: Adis Hamzić Signed-off-by: Alex Deucher

drm/radeon: fix typo in cu_per_sh on verde

2013-06-07T19:53:03Z

commit 468ef1a58c9268ac9709350bf95eaf1c22a69f29 upstream. Should be 5 rather than 2. Noticed by sroland and glisse on IRC. Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/radeon: Fix VRAM size calculation for VRAM >= 4GB

2013-05-24T18:36:03Z

commit fc986034540102cd090237bf3f70262e1ae80d9c upstream. Add ULL prefix to avoid overflow. Signed-off-by: Niels Ole Salscheider Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/radeon: fix typo in si_select_se_sh()

2013-05-11T14:18:34Z

commit 79b52d6a7085a3e430c6de450a5847fdbe04159b upstream. Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/radeon/dce6: add missing display reg for tiling setup

2013-05-11T14:18:31Z

commit 7c1c7c18fc752b2a1d07597286467ef186312463 upstream. A new tiling config register for the display blocks was added on DCE6. May fix: https://bugs.freedesktop.org/show_bug.cgi?id=62889 https://bugs.freedesktop.org/show_bug.cgi?id=57919 Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/radeon: fix S/R on VM systems (cayman/TN/SI)

2013-03-15T22:47:16Z

We weren't properly tearing down the VM sub-alloctor on suspend leading to bogus VM PTs on resume. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=60439 Reviewed-by: Christian König Tested-by: Dmitry Cherkasov Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org

drm/radeon: skip MC reset as it's probably not hung

2013-03-07T17:58:58Z

The MC is mostly likely busy (e.g., display requests), not hung so no need to reset it. Doing an MC reset is tricky and not particularly reliable. Fixes hangs in certain cases. Reported-by: Josh Boyer Signed-off-by: Alex Deucher

drm/radeon: switch get_gpu_clock() to a callback (v2)

2013-02-20T13:51:21Z

Cleans up the code for future asics v2: rebase, fix some missing radeon_asic updates Signed-off-by: Alex Deucher

drm/radeon: add a asic callback to get the xclk

2013-02-20T13:51:20Z

This is required to get the reference clock used by the gfx engine for things like timestamps. Fixes support for GL extensions the use timestamps on certain boards. Signed-off-by: Alex Deucher

drm/radeon: add ucode loading support for Oland

2013-02-02T00:34:42Z

Signed-off-by: Alex Deucher