[Bug 97088] [SKL,APL] GuC (and DMC) firmware goes missing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97088

--- Comment #4 from david.s.gordon at intel.com ---
(In reply to david.s.gordon from comment #3)
> A similar but different occurence
> 
> Command 	/opt/igt/tests/drv_module_reload_basic
> 
> Stdout 	
> 
> Reloading i915.ko with
> unbinding /sys/class/vtconsole/vtcon1/: (M) frame buffer device
> module successfully unloaded
> module successfully loaded again
> Reloading i915.ko with inject_load_failure=1
> unbinding /sys/class/vtconsole/vtcon1/: (M) frame buffer device
> module successfully unloaded
> Reloading i915.ko with inject_load_failure=2
> module successfully unloaded
> Reloading i915.ko with inject_load_failure=3
> module successfully unloaded
> Reloading i915.ko with inject_load_failure=4
> module successfully unloaded
> Reloading i915.ko with
> module successfully unloaded
> module successfully loaded again
> 
> dmesg 	
> 
> [  164.447845] Setting dangerous option enable_psr - tainting kernel
> [  164.482186] i915 0000:00:02.0: Failed to load DMC firmware
> [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling
> runtime power management.
> [  165.476834] i915 0000:00:02.0: Direct firmware load for
> i915/skl_guc_ver6_1.bin failed with error -2
> [  165.476911] [drm:intel_guc_init [i915]] *ERROR* Failed to fetch GuC
> firmware from i915/skl_guc_ver6_1.bin (error -2)
> [  174.256375] Setting dangerous option enable_psr - tainting kernel
> [  174.256378] Setting dangerous option inject_load_failure - tainting kernel
> [  174.584082] Setting dangerous option enable_psr - tainting kernel
> [  174.584085] Setting dangerous option inject_load_failure - tainting kernel
> [  174.948056] Setting dangerous option enable_psr - tainting kernel
> [  174.948058] Setting dangerous option inject_load_failure - tainting kernel
> [  175.286457] Setting dangerous option enable_psr - tainting kernel
> [  175.286460] Setting dangerous option inject_load_failure - tainting kernel
> [  175.638344] Setting dangerous option enable_psr - tainting kernel
> [  175.667779] i915 0000:00:02.0: Failed to load DMC firmware
> [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling
> runtime power management.
> [  176.652812] i915 0000:00:02.0: Direct firmware load for
> i915/skl_guc_ver6_1.bin failed with error -2
> [  176.652889] [drm:intel_guc_init [i915]] *ERROR* Failed to fetch GuC
> firmware from i915/skl_guc_ver6_1.bin (error -2)
> 
> 
> Here both the GuC firmware AND the DMC firmware seem to have gone missing.
> Unless machine (ro-skl3-i5-6260u) just doesn't have them installed?

Actually, that is the problem for this specific case; the firmware isn't
installed on that machine. That hasn't been causing failures because GuC
submission has been disabled :( It also means DMC is not getting tested, which
also goes unnoticed because DMC firmware load failure isn't flagged as an error
:(

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