[Bug 97442] [HSW HDMI] Audio with 44.1 khz not working when 1920x1080p screen refreshrate > 30hz

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Aug 22 20:53:12 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=97442

--- Comment #1 from Mark Wilczynski <Mark_Wilczynski at hotmail.com> ---
These lines look suspect to me:

4.7.0 kernel:
[   19.311673] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 148352 1920
2008 2052 2200 1080 1084 1089 1125 0x0 0x5
[   19.311678] [drm:intel_dump_crtc_timings] crtc timings: 148352 1920 2008
2052 2200 1080 1084 1089 1125, type: 0x0 flags: 0x5
[   19.311681] [drm:intel_dump_pipe_config] port clock: 222528

4.1.10 kernel:
[   13.995054] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 148352 1920
2008 2052 2200 1080 1084 1089 1125 0x0 0x5
[   13.995057] [drm:intel_dump_pipe_config] adjusted mode:
[   13.995062] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 148352 1920
2008 2052 2200 1080 1084 1089 1125 0x0 0x5
[   13.995068] [drm:intel_dump_crtc_timings] crtc timings: 148352 1920 2008
2052 2200 1080 1084 1089 1125, type: 0x0 flags: 0x5
[   13.995071] [drm:intel_dump_pipe_config] port clock: 148352

As you can see, the port clock of 222528 is probably wrong on the newer kernel.
 On the older kernel, it matches the pixel clock of 148352 as requested by the
Modeline.  Both logs are when screen was set to 1920x1080p @59.94 refresh. 
Incidentally, I also noticed skipping video frames approximately every 20
seconds when playing back 59.940 fps video files on the 4.7 kernel.  No skipped
video frames on 4.1.10.

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