On 2025-11-26 15:47, Jani Nikula wrote:
On Wed, 26 Nov 2025, Yaroslav <[email protected]> wrote:
On 2025-11-26 15:29, Jani Nikula wrote:
On Wed, 26 Nov 2025, Yaroslav <[email protected]> wrote:
The failure mode is: Someone buys a new shiny laptop with eDP MSO, with
bigger vendor block, and won't get a picture on screen.
I understand that, I'm only confused because this does seem to be as
suitable for backport as this fixed DSC bpp thing is:
Someone buys a VR headset with fixed DSC bpp (Bigscreen Beyond/Bigscreen
Beyond 2/Vive Pro 2), and the system is unable to detect them.
Unless eDP MSO with vendor specific data block extended with unset fixed
DSC bpp value is much more popular in the wild, that is. I have however
failed to discover any devices which have this value present other than
the three mentioned VR headsets.
The difference is between an existing and enabled feature working vs. a
new feature working. eDP MSO is expected to work. Also, IIUC you can
still use the VR headsets albeit with a lower resolution. For eDP MSO
you simply get nothing, and even beginning to debug the issue is
problematic, since that is quite possibly the only display on the
device.
You can use Vive Pro 2 with a lower resolution, but there is no lower
resolution option present for BSB/BSB2, their support is always borked
without this patch, and they are more popular in the linux community.
BR,
Jani.
