Bug 97000 - Wrong assumption in the driver about the lowest supported PLL frequency
Summary: Wrong assumption in the driver about the lowest supported PLL frequency
Status: CLOSED INVALID
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: high critical
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-07-20 00:43 UTC by Carlos Marquez
Modified: 2017-03-28 11:12 UTC (History)
3 users (show)

See Also:
i915 platform: BYT
i915 features: display/DSI

Attachments
dmesg output from boot, kernel cmdline with drm.debug=14 (86.72 KB, text/plain)
2016-07-20 00:43 UTC, Carlos Marquez 		no flags Details
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Description Carlos Marquez 2016-07-20 00:43:14 UTC 
Created attachment 125153 [details]
dmesg output from boot, kernel cmdline with drm.debug=14

There seems to be a wrong assumption in the driver about the lowest supported PLL frequency (since the driver rejects a mode that BIOS accepted and enabled).

Build Date: Jul 4, 2016.
Platform: Baytrail with AXP 288 PMIC.
Comment 1 Cooper Chiou 2016-08-02 03:09:56 UTC 
There are some MIPI commands not available error, please check your VBT MIPI command and DTD timing whether correct per TCON spec defined.

[    4.783436] [drm:generic_exec_sequence] MIPI sequence 4 - MIPI_SEQ_DISPLAY_OFF not available
[    4.797146] [drm:generic_exec_sequence] MIPI sequence 5 - MIPI_SEQ_DEASSERT_RESET not available
[    5.417563] [drm:generic_exec_sequence] MIPI sequence 1 - MIPI_SEQ_ASSERT_RESET not available
[    5.547590] [drm:generic_exec_sequence] MIPI sequence 3 - MIPI_SEQ_DISPLAY_ON not available
Comment 2 Cooper Chiou 2017-03-10 02:56:49 UTC 
Hi Carlos,

Did this issue still happen with latest drm driver?
Comment 3 Jani Nikula 2017-03-28 11:12:23 UTC 
Long time with no updates from the reporter, and plenty of fixes have landed in drm-tip branch of https://cgit.freedesktop.org/drm/drm-tip since. Closing, please reopen if the problems persist with drm-tip.

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