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| author | Adam Jackson <ajax@redhat.com> | 2010-05-13 14:45:42 -0400 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-05-26 14:12:47 -0700 |
| commit | 9962c9252e46eda7058067cbe73bdf1ed74b0d37 (patch) | |
| tree | 7e917a10e13dd6d94ed9de26c12f8b270a0bd68e /drivers/gpu/drm/i915/intel_dp.c | |
| parent | 9908ff736adf261e749b4887486a32ffa209304c (diff) | |
| download | lwn-9962c9252e46eda7058067cbe73bdf1ed74b0d37.tar.gz lwn-9962c9252e46eda7058067cbe73bdf1ed74b0d37.zip | |
drm/i915/dp: Only enable enhanced framing if the sink supports it
DisplayPort spec v1.1a, Table 2-52.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 6b1c9a27c27a..6eed9a2006d7 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -675,10 +675,9 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, dp_priv->link_configuration[1] = dp_priv->lane_count; /* - * Check for DPCD version > 1.1, - * enable enahanced frame stuff in that case + * Check for DPCD version > 1.1 and enhanced framing support */ - if (dp_priv->dpcd[0] >= 0x11) { + if (dp_priv->dpcd[0] >= 0x11 && (dp_priv->dpcd[2] & DP_ENHANCED_FRAME_CAP)) { dp_priv->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; dp_priv->DP |= DP_ENHANCED_FRAMING; } |