[PATCH 0/1][SRU][Noble] Fix amdgpu hangs on DCN 3.5 at bootup

[You-Sheng Yang]

BugLink: https://bugs.launchpad.net/bugs/2066233

[Impact]

Newer VBIOS on DCN 3.5 bumped the version of IntegratedInfo table from 2.2 to
2.3. This version uses same structure. Version 2.3 is missing from the
construct_integrated_info() parser, so it leads to NULL pointer dereference.

```
Call Trace:
<TASK>
? show_regs+0x72/0x90
? __die+0x25/0x80
? page_fault_oops+0x154/0x4c0
? ttm_bo_kmap+0x11d/0x310 [ttm]
? dma_resv_wait_timeout+0x48/0xe0
? do_user_addr_fault+0x30e/0x6e0
? exc_page_fault+0x84/0x1b0
? asm_exc_page_fault+0x27/0x30
? dcn35_clk_mgr_construct+0x183/0x2210 [amdgpu]
? dcn35_clk_mgr_construct+0x15a/0x2210 [amdgpu]
? dcn35_hwseq_create+0x23/0x470 [amdgpu]
```

[Fix]

Fix landed to upstream v6.9-rc7: 9a35d205f466 ("drm/amd/display: Atom
Integrated System Info v2_2 for DCN35")

[Test Case]

AMDGPU should then be initialized successfully without NULL pointer deref dump
at boot.

[Where problems could occur]

No. New hardware revision with same data only.

[Other Info]

While this has been landed to v6.9-rc7, expect every kernel version older than
that with planned support to the new VBIOS update should be fixed. So far
linux/noble and linux-oem-6.8/noble are nominated by chip vendor.

Gabe Teeger (1):
  drm/amd/display: Atom Integrated System Info v2_2 for DCN35

 drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c | 1 +
 1 file changed, 1 insertion(+)

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2.43.0