[Intel-gfx] [PATCH v2] drm/i915/chv: Remove DPIO force latency causing interpair skew issue

[Jani Nikula]

On Sat, 11 Apr 2015, shuang.he at intel.com wrote:
> Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
> Task id: 6167
> -------------------------------------Summary-------------------------------------
> Platform          Delta          drm-intel-nightly          Series Applied
> PNV                                  276/276              276/276
> ILK                                  302/302              302/302
> SNB                 -31              313/313              282/313

The patch does not touch SNB code paths, what gives?

BR,
Jani.

> IVB                                  337/337              337/337
> BYT                                  286/286              286/286
> HSW                                  395/395              395/395
> BDW                                  321/321              321/321
> -------------------------------------Detailed-------------------------------------
> Platform  Test                                drm-intel-nightly          Series Applied
>  SNB  igt at kms_flip@bo-too-big-interruptible      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip_event_leak      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@flip-vs-dpms-off-vs-modeset      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@flip-vs-dpms-off-vs-modeset-interruptible      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@nonexisting-fb      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@nonexisting-fb-interruptible      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@single-buffer-flip-vs-dpms-off-vs-modeset      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip@single-buffer-flip-vs-dpms-off-vs-modeset-interruptible      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_flip_tiling@flip-changes-tiling      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_mmio_vs_cs_flip@setcrtc_vs_cs_flip      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_mmio_vs_cs_flip@setplane_vs_cs_flip      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at kms_rotation_crc@primary-rotation      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@cursor      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@cursor-dpms      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@debugfs-forcewake-user      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@dpms-mode-unset-non-lpsp      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@dpms-non-lpsp      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@drm-resources-equal      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@fences      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@fences-dpms      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@gem-execbuf      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@gem-idle      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@gem-mmap-cpu      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@gem-mmap-gtt      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@gem-pread      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@i2c      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@modeset-non-lpsp      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@modeset-non-lpsp-stress-no-wait      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@pci-d3-state      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@reg-read-ioctl      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
>  SNB  igt at pm_rpm@rte      DMESG_WARN(5)PASS(3)      DMESG_WARN(2)
> (dmesg patch applied)drm:intel_dp_start_link_train[i915]]*ERROR*too_many_voltage_retries,give_up at too many voltage .* give up
> drm:intel_dp_complete_link_train[i915]]*ERROR*failed_to_train_DP,aborting at failed to train .* aborting
> Note: You need to pay more attention to line start with '*'
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-- 
Jani Nikula, Intel Open Source Technology Center