DDI_BUF_EMP_800MV_3_5DB_HSW
};
+static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
+ enum port port)
+{
+ uint32_t reg = DDI_BUF_CTL(port);
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ udelay(1);
+ if (I915_READ(reg) & DDI_BUF_IS_IDLE)
+ return;
+ }
+ DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
+}
/* Starting with Haswell, different DDI ports can work in FDI mode for
* connection to the PCH-located connectors. For this, it is necessary to train
return;
}
+ temp = I915_READ(DDI_BUF_CTL(PORT_E));
+ temp &= ~DDI_BUF_CTL_ENABLE;
+ I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
+ POSTING_READ(DDI_BUF_CTL(PORT_E));
+
/* Disable DP_TP_CTL and FDI_RX_CTL and retry */
- I915_WRITE(DP_TP_CTL(PORT_E),
- I915_READ(DP_TP_CTL(PORT_E)) & ~DP_TP_CTL_ENABLE);
+ temp = I915_READ(DP_TP_CTL(PORT_E));
+ temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
+ temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
+ I915_WRITE(DP_TP_CTL(PORT_E), temp);
+ POSTING_READ(DP_TP_CTL(PORT_E));
+
+ intel_wait_ddi_buf_idle(dev_priv, PORT_E);
rx_ctl_val &= ~FDI_RX_ENABLE;
I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+ POSTING_READ(_FDI_RXA_CTL);
/* Reset FDI_RX_MISC pwrdn lanes */
temp = I915_READ(_FDI_RXA_MISC);
temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
I915_WRITE(_FDI_RXA_MISC, temp);
+ POSTING_READ(_FDI_RXA_MISC);
}
DRM_ERROR("FDI link training failed!\n");
}
}
-static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
- enum port port)
-{
- uint32_t reg = DDI_BUF_CTL(port);
- int i;
-
- for (i = 0; i < 8; i++) {
- udelay(1);
- if (I915_READ(reg) & DDI_BUF_IS_IDLE)
- return;
- }
- DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
-}
-
static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
{
struct drm_encoder *encoder = &intel_encoder->base;