[Bug 101307] New: [DP] [HSW] HD chopped playback

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101307

            Bug ID: 101307
           Summary: [DP] [HSW] HD chopped playback
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: victor.jesusx.lopez.carrillo at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 131723
  --> https://bugs.freedesktop.org/attachment.cgi?id=131723&action=edit
Slow Video Failure

System Environment
=======
OS: Linux Ubuntu 17.04 64 bits
Kernel: 4.12.0-rc3-drm-tip-ww2-commit-187376e+
X-Org: 1.19.99.1

Regression?
=======
No

Bug detailed description
=======
Videos have frame rate issues as they seem to get stuck momentarily (specially
with the FLV/SWF formats), the higher the resolution, the heavier the problem

Reproduce Steps
==============
Open a video (streamed or local), from 720p resolution and up

Expected Result
=============
It should play at normal speed.

Actual Result
===========
Plays intermittently at different frame rates with a regular frame drop.

Analysis & Root Cause
===================
Possible and maybe required bottleneck detection within the graphics stack
(even per-output port display sequencing), improper buffer usage.

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