This bug was fixed in the package linux-oem-5.10 - 5.10.0-1011.12
---------------
linux-oem-5.10 (5.10.0-1011.12) focal; urgency=medium
* focal/linux-oem-5.10: 5.10.0-1011.12 -proposed tracker (LP:
#1913030)
* Support CML-S CPU + TGP PCH (LP: #1909457)
- Revert "UBUNTU: SAUCE: drm/i915/rkl: new rkl ddc map for different PCH"
- drm/i915/dg1: gmbus pin mapping
- drm/i915/dg1: Don't program PHY_MISC for PHY-C and PHY-D
- drm/i915/dg1: add hpd interrupt handling
- drm/i915/display/ehl: Limit eDP to HBR2
- drm/i915/jsl: Split EHL/JSL platform info and PCI ids
- drm/i915: Add PORT_TCn aliases to enum port
- drm/i915: s/PORT_TC/TC_PORT_/
- drm/i915/rkl: new rkl ddc map for different PCH
- SAUCE: drm/i915/gen9_bc : Add TGP PCH support
* backlight parsing for VBT 234+ (LP: #1912157)
- drm/i915/vbt: Fix backlight parsing for VBT 234+
- drm/i915/vbt: Update the version and expected size of
BDB_GENERAL_DEFINITIONS map
- drm/i915/vbt: Add VRR VBT toggle
* HD Audio Device PCI ID for the Intel Cometlake-R platform (LP: #1912427)
- SAUCE: ALSA: hda: Add Cometlake-R PCI ID
-- Timo Aaltonen <timo.aalto...@canonical.com> Mon, 25 Jan 2021
11:43:18 +0200
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1909457
Title:
Support CML-S CPU + TGP PCH
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux-oem-5.10 source package in Focal:
Fix Released
Status in linux source package in Hirsute:
In Progress
Bug description:
[Impact]
i915 driver gives below warnings that CML-S GPU doesn't work with TGL/RKL
PCH, and the screen is blank.
kernel: i915 0000:00:02.0: drm_WARN_ON(!IS_PLATFORM(dev_priv,
INTEL_TIGERLAKE) && !IS_PLATFORM(dev_priv, INTEL_ROCKETLAKE))
[Fix]
Intel provides us a new patch for this issue
https://patchwork.freedesktop.org/patch/412664/
[Test]
Verified on new Dell platforms.
[Where problems could occur]
The first commit reverts the patch that didn't find its way to upstream.
The second to forth commits are to enable DG1 which applied for solving
conflicts.
The fifth and sixth commit splits code for EHL and JSL.
The seventh and eighth commits rename enums, no function changes.
The ninth commit is newer version of the first reverted commit.
The tenth commit adds CML CPU support on TGP PCH which fixes this issue.
According to the above explanation,
1. the DG1 in newly enabled by commits 2 to 4, no regression could occur,
2. the EHL and JSL commits are pretty simple and straightforward, should be
safe to include,
3. the first commit is equivalence to the ninth commit
4. the tenth commit is pretty simple to add GEN9 into flow control,
so I think there should be no problems could occur from this patchset.
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