It looks like a bug has crept in to etnaviv between 4.16 and 4.17, which causes etnaviv to misbehave with the GC600 GPU on Dove. I don't think it's a GPU issue, I think it's a DRM issue. I get multiple: [ 596.711482] etnaviv-gpu f1840000.gpu: recover hung GPU! [ 597.732852] etnaviv-gpu f1840000.gpu: GPU failed to reset: FE not idle, 3D not idle, 2D not idle while Xorg is starting up. Ignore the "failed to reset", that just seems to be a property of the GC600, and of course is a subsequent issue after the primary problem. Looking at the devcoredump: 00000004 = 000000fe Idle: FE- DE+ PE+ SH+ PA+ SE+ RA+ TX+ VG- IM- FP- TS- So, all units on the GC600 were idle except for the front end. 00000660 = 00000812 Cmd: [wait DMA: idle Fetch: valid] Req idle Cal idle 00000664 = 102d06d8 Command DMA address 00000668 = 380000c8 FE fetched word 0 0000066c = 0000001f FE fetched word 1 The front end was basically idle at this point, at a WAIT 200 command. Digging through the ring: 00688: 08010e01 00000040 LDST 0x3804=0x00000040 00690: 40000002 102d06a0 LINK 0x102d06a0 00698: 40000002 102d0690 LINK 0x102d0690 006a0: 08010e04 0000001f LDST 0x3810=0x0000001f 006a8: 40000025 102d3000 LINK 0x102d3000 006b0: 08010e03 00000008 LDST 0x380c=0x00000008 Flush PE2D 006b8: 08010e02 00000701 LDST 0x3808=0x00000701 SEM FE -> PE 006c0: 48000000 00000701 STALL FE -> PE 006c8: 08010e01 00000041 LDST 0x3804=0x00000041 006d0: 380000c8(0000001f) WAIT 200 006d8: 40000002 102d06d0 LINK 0x102d06d0 <=========== We've basically come to the end of the currently issued command stream and hit the wait-link loop. Everything else in the devcoredump looks normal. So, I think etnaviv DRM has missed an event signalled from the GPU. This worked fine in 4.16, so seems to be a regression. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
