Radeon Verde displayport failure.

[Dave Jones <davej@codemonkey.org.uk>]

I just bought a new radeon (1002:682c), to pair with my shiny new displayport monitor.
It shows a display during through the BIOS POST, and grub, but when the kernel
starts up, it's a coin toss whether or not I get anything.
Sometimes it just goes straight into power saving.

When I do get something on the console, it continues to boot and then X starts up and
puts it into power saving too. Trying to flip back to tty1 doesn't light up the display again.

I'm running On debian stable, with copied-by-hand verde_* firmware files from the linux-firmware git tree.
Here's a log from the 4.0-rc2 kernel.

Any other info I can provide ?

	Dave



[drm] register mmio base: 0xFBE00000
[drm] register mmio size: 262144
radeon 0000:01:00.0: Invalid ROM contents
ATOM BIOS: C755
radeon 0000:01:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used)
radeon 0000:01:00.0: GTT: 1024M 0x0000000080000000 - 0x00000000BFFFFFFF
[drm] Detected VRAM RAM=2048M, BAR=256M
[drm] RAM width 128bits DDR
[TTM] Zone  kernel: Available graphics memory: 16400232 kiB
[TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[TTM] Initializing pool allocator
[TTM] Initializing DMA pool allocator
[drm] radeon: 2048M of VRAM memory ready
[drm] radeon: 1024M of GTT memory ready.
[drm] Loading verde Microcode
[drm] Internal thermal controller with fan control
[drm] probing gen 2 caps for device 8086:2f08 = 77a3103/e
input: HDA ATI HDMI HDMI as /devices/pci0000:00/0000:00:03.0/0000:01:00.1/sound/card0/input4
input: HDA ATI HDMI HDMI as /devices/pci0000:00/0000:00:03.0/0000:01:00.1/sound/card0/input5
[drm] radeon: dpm initialized
[drm] GART: num cpu pages 262144, num gpu pages 262144
[drm] probing gen 2 caps for device 8086:2f08 = 77a3103/e
[drm] PCIE gen 3 link speeds already enabled
[drm] PCIE GART of 1024M enabled (table at 0x0000000000277000).
radeon 0000:01:00.0: WB enabled
radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0xffff880807d0ac00
radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000080000c04 and cpu addr 0xffff880807d0ac04
radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000080000c08 and cpu addr 0xffff880807d0ac08
radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0xffff880807d0ac0c
radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000080000c10 and cpu addr 0xffff880807d0ac10
radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffc90001035a18
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
radeon 0000:01:00.0: radeon: MSI limited to 32-bit
radeon 0000:01:00.0: radeon: using MSI.
[drm] radeon: irq initialized.
[drm] ring test on 0 succeeded in 1 usecs
[drm] ring test on 1 succeeded in 1 usecs
[drm] ring test on 2 succeeded in 1 usecs
[drm] ring test on 3 succeeded in 9 usecs
[drm] ring test on 4 succeeded in 3 usecs
[drm] ring test on 5 succeeded in 2 usecs
[drm] UVD initialized successfully.
[drm] ib test on ring 0 succeeded in 0 usecs
[drm] ib test on ring 1 succeeded in 0 usecs
[drm] ib test on ring 2 succeeded in 0 usecs
[drm] ib test on ring 3 succeeded in 0 usecs
[drm] ib test on ring 4 succeeded in 0 usecs
[drm] ib test on ring 5 succeeded
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]   DP-1
[drm]   HPD4
[drm]   DDC: 0x6540 0x6540 0x6544 0x6544 0x6548 0x6548 0x654c 0x654c
[drm]   Encoders:
[drm]     DFP1: INTERNAL_UNIPHY2
[drm] Connector 1:
[drm]   DP-2
[drm]   HPD5
[drm]   DDC: 0x6530 0x6530 0x6534 0x6534 0x6538 0x6538 0x653c 0x653c
[drm]   Encoders:
[drm]     DFP2: INTERNAL_UNIPHY1
[drm] Connector 2:
[drm]   DP-3
[drm]   HPD1
[drm]   DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
[drm]   Encoders:
[drm]     DFP3: INTERNAL_UNIPHY1
[drm] Connector 3:
[drm]   DP-4
[drm]   HPD2
[drm]   DDC: 0x6580 0x6580 0x6584 0x6584 0x6588 0x6588 0x658c 0x658c
[drm]   Encoders:
[drm]     DFP4: INTERNAL_UNIPHY
[drm:si_dpm_set_power_state [radeon]] *ERROR* si_enable_smc_cac failed
[drm] fb mappable at 0xD047A000
[drm] vram apper at 0xD0000000
[drm] size 3145728
[drm] fb depth is 24
[drm]    pitch is 4096
fbcon: radeondrmfb (fb0) is primary device
[drm:si_dpm_set_power_state [radeon]] *ERROR* si_enable_smc_cac failed
[drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
Console: switching to colour frame buffer device 128x48
radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
radeon 0000:01:00.0: registered panic notifier
[drm] Initialized radeon 2.42.0 20080528 for 0000:01:00.0 on minor 0
[drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed

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