From: Paulo Zanoni <paulo.r.zanoni at intel.com>
Just a missing register. There is no problem to run this code when the
output is HDMI.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 5071370..4f03b1b 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1105,14 +1105,23 @@ void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
struct drm_i915_private *dev_priv = encoder->dev->dev_private;
enum port port = intel_ddi_get_encoder_port(intel_encoder);
uint32_t val;
+ bool wait = false;
val = I915_READ(DDI_BUF_CTL(port));
if (val & DDI_BUF_CTL_ENABLE) {
val &= ~DDI_BUF_CTL_ENABLE;
I915_WRITE(DDI_BUF_CTL(port), val);
- intel_wait_ddi_buf_idle(dev_priv, port);
+ wait = true;
}
+ val = I915_READ(DP_TP_CTL(port));
+ val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
+ val |= DP_TP_CTL_LINK_TRAIN_PAT1;
+ I915_WRITE(DP_TP_CTL(port), val);
+
+ if (wait)
+ intel_wait_ddi_buf_idle(dev_priv, port);
+
I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
}
--
1.7.11.4
