[PATCH 4/4] drm/i915: Detect USB-C specific dongles before reducing M and N

2017-05-18 Thread Jani Nikula
The Analogix 7737 DP to HDMI converter requires reduced M and N values when to operate correctly at HBR2. We tried to reduce the M/N values for all devices in commit 9a86cda07af2 ("drm/i915/dp: reduce link M/N parameters"), but that regressed some other sinks. Detect this IC by its OUI value of

Re: [PATCH 4/4] drm/i915: Detect USB-C specific dongles before reducing M and N

2017-05-18 Thread Daniel Vetter
On Wed, May 17, 2017 at 05:25:16PM +0300, Jani Nikula wrote: > The Analogix 7737 DP to HDMI converter requires reduced M and N values > when to operate correctly at HBR2. Detect this IC by its OUI value of > 0x0022B9 via the DPCD quirk list. Commit message is a bit confusing since this sounds

[PATCH 4/4] drm/i915: Detect USB-C specific dongles before reducing M and N

2017-05-17 Thread Jani Nikula
The Analogix 7737 DP to HDMI converter requires reduced M and N values when to operate correctly at HBR2. Detect this IC by its OUI value of 0x0022B9 via the DPCD quirk list. v2 by Jani: Rebased on the DP quirk database v3 by Jani: Rebased on the reworked DP quirk database Fixes: 9a86cda07af2