Bug 107897

Summary: [Gemini Lake] HDMI 2.0 compliance test failed - HF1-23 E-DDC protocol- Read request- Clock stretching
Product: DRI Reporter: JingWu Lin <jingwu.lin>
Component: DRM/IntelAssignee: Clinton Taylor <clinton.a.taylor>
Status: CLOSED NOTOURBUG QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: medium CC: intel-gfx-bugs, lakshminarayana.vudum
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard: Triaged
i915 platform: GLK i915 features: display/HDMI
Bug Depends on:    
Bug Blocks: 107905    
Description Flags
HF1-23 results with latest QD980B firmware none

Description JingWu Lin 2018-09-11 03:31:46 UTC
Created attachment 141517 [details]

GKL fails HDMI 2.0 compliance test HF1-23 E-DDC protocol- Read request- Clock stretching.
Comment 1 JingWu Lin 2018-09-11 03:32:33 UTC
Created attachment 141518 [details]
Comment 2 Lakshmi 2018-09-11 06:31:28 UTC
Please try to reproduce the error using drm-tip (https://cgit.freedesktop.org/drm-tip) and kernel parameters drm.debug=0x1e log_buf_len=4M, and if the problem persists attach the full dmesg from boot.
Comment 3 Clinton Taylor 2018-10-05 17:48:30 UTC
The SOC DDC controller does support clock stretching. My QD980B does not have the required test package to test HF1-23. Can another team reproduce this issue?
Comment 4 Clinton Taylor 2018-10-17 18:05:43 UTC
Created attachment 142073 [details]
HF1-23 results with latest QD980B firmware

Latest version of QD980B firmware has a fix for a known issue with the HF1-23 compliance test. Using FW version 5.01.06_23474_201808100859 results in passing results as seen in attachment.
Comment 5 Clinton Taylor 2018-10-17 18:06:29 UTC
Update QD980B to Version 5.01.06_23474_201808100859 FW or later

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