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| author | Imre Deak <imre.deak@intel.com> | 2013-07-09 17:05:26 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-09 16:35:50 +0200 |
| commit | d4eead50eb206b875f54f66cc0f6ec7d54122c28 (patch) | |
| tree | f94f8acf87faffa3585bd8920a0f8bd72224d2dc | |
| parent | aaf8a5167291b65e9116cb8736d862965b57c13a (diff) | |
| download | op-kernel-dev-d4eead50eb206b875f54f66cc0f6ec7d54122c28.zip op-kernel-dev-d4eead50eb206b875f54f66cc0f6ec7d54122c28.tar.gz | |
drm/i915: fix lane bandwidth capping for DP 1.2 sinks
DP 1.2 compatible displays may report a 5.4Gbps maximum bandwidth which
the driver will treat as an invalid value and use 1.62Gbps instead. Fix
this by capping to 2.7Gbps for sinks reporting a 5.4Gbps max bw.
Also add a warning for reserved values.
v2:
- allow only bw values explicitly listed in the DP standard (Daniel,
Chris)
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index b739712..26e162b 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -75,7 +75,12 @@ intel_dp_max_link_bw(struct intel_dp *intel_dp) case DP_LINK_BW_1_62: case DP_LINK_BW_2_7: break; + case DP_LINK_BW_5_4: /* 1.2 capable displays may advertise higher bw */ + max_link_bw = DP_LINK_BW_2_7; + break; default: + WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n", + max_link_bw); max_link_bw = DP_LINK_BW_1_62; break; } |
