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| author | Jani Nikula <jani.nikula@intel.com> | 2017-05-18 14:10:25 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-05-29 13:43:47 +0300 |
| commit | b31e85eda38c58cae986162ae2c462b53b0a2065 (patch) | |
| tree | 5f7c60ad4e74c0d7c53d089b9f712ae6bd8d63f4 /include | |
| parent | 76fa998acd86b6b40d0217e12af39c2406bdcd2b (diff) | |
| download | linux-b31e85eda38c58cae986162ae2c462b53b0a2065.tar.bz2 | |
drm/i915: Detect USB-C specific dongles before reducing M and N
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 0x0022B9 via the DPCD quirk list, and only reduce the M/N
values for that.
v2 by Jani: Rebased on the DP quirk database
v3 by Jani: Rebased on the reworked DP quirk database
v4 by Jani: Improve commit message (Daniel)
Fixes: 9a86cda07af2 ("drm/i915/dp: reduce link M/N parameters")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93578
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100755
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/2d2e30f8f47d3f28c9b74ca2612336a54585c3ec.1495105635.git.jani.nikula@intel.com
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions