APPLIED/OEM: Re: [SRU] [linux-oem] [PATCH v2 00/16] Fix out of bound VBT pin on CNP

Timo Aaltonen tjaalton at
Mon Feb 12 13:06:31 UTC 2018

On 31.01.2018 08:09, Kai-Heng Feng wrote:
> BugLink:
> [Impact]
> i915 crashed when probing for VBT pin. No graphics output after that.
> [Test Case]
> Enable Legacy ROM boot option in BIOS. Screen goes blank.
> Cherrypick fixes can solve the issue.
> [Fix]
> Handle out of bounds pin value more appropriately.
> Patches from Jani are most refactoring, but the fix we want depends on
> them.
> Patches from Rogrigo are the fixes we want. These patches are also
> picked base on his suggestion,
> [Regression Potential]
> Low. CNL and CNP are still quite new. These commits are limited to them.
> Jani Nikula (12):
>   drm/i914/bios: amend child device config parameters
>   drm/i915/bios: document BDB versions of child device config fields
>   drm/i915/bios: remove the raw version of child device config
>   drm/i915/bios: add legacy contents to common child device config
>   drm/i915/bios: throw away high level child device union
>   drm/i915/bios: throw away struct old_child_dev_config
>   drm/i915/bios: document child device config dvo_port values a bit
>     better
>   drm/i914/bios: group device type definitions together
>   drm/i915/bios: throw away unused DVO_* macros
>   drm/i915/bios: drop the rest of the p_ prefixes from pointers
>   drm/i915/bios: split up iboost to hdmi and dp bitfields
>   drm/i915/bios: add DP max link rate to VBT child device struct
> Rodrigo Vivi (4):
>   drm/i915/cnl: Don't trust VBT's alternate pin for port D for now.
>   drm/i915/cnl: Map VBT DDC Pin to BSpec DDC Pin.
>   drm/i915/cnp: Ignore VBT request for know invalid DDC pin.
>   drm/i915/cnp: Properly handle VBT ddc pin out of bounds.
>  drivers/gpu/drm/i915/i915_drv.h       |   2 +-
>  drivers/gpu/drm/i915/intel_bios.c     | 226 ++++++++++++++------------
>  drivers/gpu/drm/i915/intel_vbt_defs.h | 295 +++++++++++++++++++---------------
>  3 files changed, 290 insertions(+), 233 deletions(-)

applied to linux-oem, thanks


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