[Bug 94102] rm:parse_csr_fw [i915]] *ERROR* Unknown stepping info, firmware loading failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94102

--- Comment #3 from achnet8 at gmail.com ---
FYI looks like there may still be issue with i7 6560u

Ubuntu 15.10 w/ 4.5 kernel. The extra J0 and K0 steppings are in the Ubuntu git
source.

dmesg:
[    0.000000] Kernel command line:
BOOT_IMAGE=/boot/vmlinuz-4.5.0-040500-generic
root=UUID=6abf1642-e374-458e-8273-5b5162d58682 ro nvme i915 i915.enable_rc6=0
quiet splash vt.handoff=7
[    1.567984] [drm:parse_csr_fw [i915]] *ERROR* Unknown stepping info,
firmware loading failed
[    1.568002] [drm:csr_load_work_fn [i915]] *ERROR* Failed to load DMC
firmware, disabling rpm
[    1.594551] [drm] Initialized i915 1.6.0 20151218 for 0000:00:02.0 on minor
0
[    3.419529] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    3.979845] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])

cpuinfo:
processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 78
model name    : Intel(R) Core(TM) i7-6560U CPU @ 2.20GHz
stepping    : 3
microcode    : 0x6a
cpu MHz        : 612.046
cache size    : 4096 KB
physical id    : 0
siblings    : 4
core id        : 0
cpu cores    : 2
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 22
wp        : yes

/lib/firmware/i915:
-rw-r--r-- 1 root root   8824 Nov 20 08:04 skl_dmc_ver1_23.bin
-rw-r--r-- 1 root root   8928 Mar 23 21:10 skl_dmc_ver1_26.bin
lrwxrwxrwx 1 root root     38 Mar 24 17:51 skl_dmc_ver1.bin ->
/lib/firmware/i915/skl_dmc_ver1_26.bin
-rw-r--r-- 1 root root 109636 Nov 20 08:18 skl_guc_ver1_1059.bin
-rw-r--r-- 1 root root 128320 Mar 23 20:23 skl_guc_ver4_3.bin
lrwxrwxrwx 1 root root     37 Mar 23 21:38 skl_guc_ver4.bin ->
/lib/firmware/i915/skl_guc_ver4_3.bin
-rw-r--r-- 1 root root 129024 Mar 23 21:11 skl_guc_ver6_1.bin
lrwxrwxrwx 1 root root     37 Mar 23 21:11 skl_guc_ver6.bin ->
/lib/firmware/i915/skl_guc_ver6_1.bin

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