Gitweb: http://git.kernel.org/linus/9962c9252e46eda7058067cbe73bdf1ed74b0d37
Commit: 9962c9252e46eda7058067cbe73bdf1ed74b0d37
Parent: 9908ff736adf261e749b4887486a32ffa209304c
Author: Adam Jackson <ajax@redhat.com>
AuthorDate: Thu May 13 14:45:42 2010 -0400
Committer: Eric Anholt <eric@anholt.net>
CommitDate: Wed May 26 14:12:47 2010 -0700
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>
---
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 6b1c9a2..6eed9a2 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;
}
--
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