APPLIED: [SRU][Jammy:linux-intel-iotg][PATCH v3 0/2] i915: Enable HuC authentication for EHL, ICL, and ADL-S
philip.cox at canonical.com
Tue Aug 16 18:23:07 UTC 2022
On Tue, 2022-08-16 at 10:20 -0400, Philip Cox wrote:
> BugLink: https://bugs.launchpad.net/bugs/1981971
> v2: removed magic number in patch 0002, and clean up commit message
> in commit 0001.
> v3: added version history to cover letter, and to patch commit
> * In the i915 Intel gfx driver, we need to explicitly enable HuC
> * This fixes an issue with the Gstreamer media pipeline.
> * This only applies to the ICL, ADL-S, and EHL platforms.
> * This patch is only for the linux-intel-iotg kernel. We have pulled
> in patches from upstream, so the state of this driver is in
> the upstream 5.15 driver, and the upstream tip-of-tree driver.
> [Test Plan]
> * Intel has tested this patch.
> * I have tested the patch as well.
> * To test, the system is booted, and issuing the command:
> sudo cat /sys/kernel/debug/dri/0/gt/uc/huc_info
> will either return the huc info, or it will display
> "HuC disabled"
> [Where problems could occur]
> * If the installed firmware has been trimmed so that only blobs
> that were in use were retained, when the kernel tried to load
> the HuC blob, it would fail. This scenario should not happen
> unless someone is mucking about with the installed firmware.
> If that is the case, other things will likely start failing
> as well.
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