ACK: [SRU][U/N/OEM-6.8][PATCH 0/1] Fix random HuC/GuC initialization failure of Intel i915 driver

[Tim Gardner]

On 5/7/24 05:32, Chris Chiu wrote:
> BugLink: https://bugs.launchpad.net/bugs/2061049
> 
> [Impact]
> i915 error can sometimes be found in kernel message when booting the machine w/ power unplugged
> kernel: i915 0000:00:02.0: [drm] ERROR GT1: GuC initialization failed -EIO
> kernel: i915 0000:00:02.0: [drm] ERROR GT1: Enabling uc failed (-5)
> kernel: i915 0000:00:02.0: [drm] ERROR GT1: Failed to initialize GPU, declaring it wedged!
> The GPU won't work with this failure
> 
> [Fix]
> Backport the upatream fix for allowing slow HuC loading.
> 
> [Test]
> 1. Unplug the power of the laptop and make sure it's charged by battery
> 2. Cold boot or Warm boot the machine and check the GuC init fail message.
> 3. Go to settings - > about --> graphics to make sure the GPU information is correct every boot.
> 
> [Where problems could occur]
> Simply increase the loading time of HuC still get a working system. Should be low risk of regression.
> 
> John Harrison (1):
>    drm/i915/huc: Allow for very slow HuC loading
> 
>   drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c | 10 ++--
>   drivers/gpu/drm/i915/gt/uc/intel_huc.c    | 64 ++++++++++++++++++++---
>   2 files changed, 63 insertions(+), 11 deletions(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>
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Tim Gardner
Canonical, Inc