From: Paulo Zanoni <[email protected]> The DP_TP_STATUS register for PORT_A doesn't exist. Our documentation will be fixed soon, so the code does not match it for now.
This solves "Timed out waiting for DP idle patterns" and "unclaimed register" messages on eDP. V1: Was called "drm/i915: don't read DP_TP_STATUS(PORT_A)" V2: Was called "drm/i915: don't send DP idle pattern before normal pattern on HSW" V3: Only change the code that touches PORT_A. Signed-off-by: Paulo Zanoni <[email protected]> --- drivers/gpu/drm/i915/intel_dp.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 51fd797..1b76b04 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1785,14 +1785,18 @@ intel_dp_set_link_train(struct intel_dp *intel_dp, temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { case DP_TRAINING_PATTERN_DISABLE: - temp |= DP_TP_CTL_LINK_TRAIN_IDLE; - I915_WRITE(DP_TP_CTL(port), temp); - if (wait_for((I915_READ(DP_TP_STATUS(port)) & - DP_TP_STATUS_IDLE_DONE), 1)) - DRM_ERROR("Timed out waiting for DP idle patterns\n"); + if (port != PORT_A) { + temp |= DP_TP_CTL_LINK_TRAIN_IDLE; + I915_WRITE(DP_TP_CTL(port), temp); + + if (wait_for((I915_READ(DP_TP_STATUS(port)) & + DP_TP_STATUS_IDLE_DONE), 1)) + DRM_ERROR("Timed out waiting for DP idle patterns\n"); + + temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; + } - temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; break; -- 1.7.10.4 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
