[Bug 105331] Dithering doesn't work on HD4600 when using DP

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=105331

Mario Kleiner <mario.kleiner at tuebingen.mpg.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mario.kleiner at tuebingen.mpg
                   |                            |.de

--- Comment #10 from Mario Kleiner <mario.kleiner at tuebingen.mpg.de> ---
I haven't tested this yet, but doesn't this change degrade any DVI or analog
VGA display to 6 bpc/18 bpp if it is connected to DisplayPort via a DP->DVI or
DP->VGA adapter?

That would be pretty disastrous to many medical/scientific vision testing
applications that need at least 8 bpc without dithering, and often have to rely
on specialized DVI/VGA display hardware, given that many machines nowadays only
have DP outputs, but no real DVI or VGA connectors anymore.

A similar problem was fixed in e8fa4270536de2e5e8205fb2b90bb26afc471729
"drm/i915: Only dither on 6bpc panels" just a couple of months ago and i'm
worried this reintroduces the problem for DP?

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the assignee for the bug.