[V3 PATCH 1/2] drivers-gpu-drm-allow-to-load-edid-firmware.patch

Bastien ROUCARIES roucaries.bastien at gmail.com
Thu Mar 15 03:30:36 PDT 2012

On Thu, Mar 15, 2012 at 10:52 AM, Carsten Emde <C.Emde at osadl.org> wrote:
> Broken monitors and/or broken graphic boards may send erroneous or no
> EDID data. This also applies to broken KVM devices that are unable to
> correctly forward the EDID data of the connected monitor but invent
> their own fantasy data.
> This patch allows to specify an EDID data set to be used instead of
> probing the monitor for it. It contains built-in data sets of frequently
> used screen resolutions. In addition, a particular EDID data set may be
> provided in the /lib/firmware directory and loaded via the firmware
> interface. The name is passed to the kernel as module parameter of the
> drm_kms_helper module either when loaded
>  options drm_kms_helper edid_firmware=edid/1280x1024.bin
> or as kernel commandline parameter
>  drm_kms_helper.edid_firmware=edid/1280x1024.bin

Windows allow vendor to override eddid based on 3 bytes manufacturer
and product code.

Seems a reasonnable approach to follow.


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