drm/i915: Cache LVDS EDID
[pandora-kernel.git] / drivers / gpu / drm / i915 / intel_dp.c
index 9caccd0..ec26ee7 100644 (file)
@@ -58,14 +58,23 @@ struct intel_dp {
        struct i2c_adapter adapter;
        struct i2c_algo_dp_aux_data algo;
        bool is_pch_edp;
+       uint8_t train_set[4];
+       uint8_t link_status[DP_LINK_STATUS_SIZE];
 };
 
 static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder)
 {
-       return container_of(enc_to_intel_encoder(encoder), struct intel_dp, base);
+       return container_of(encoder, struct intel_dp, base.base);
+}
+
+static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
+{
+       return container_of(intel_attached_encoder(connector),
+                           struct intel_dp, base);
 }
 
-static void intel_dp_link_train(struct intel_dp *intel_dp);
+static void intel_dp_start_link_train(struct intel_dp *intel_dp);
+static void intel_dp_complete_link_train(struct intel_dp *intel_dp);
 static void intel_dp_link_down(struct intel_dp *intel_dp);
 
 void
@@ -145,8 +154,7 @@ static int
 intel_dp_mode_valid(struct drm_connector *connector,
                    struct drm_display_mode *mode)
 {
-       struct drm_encoder *encoder = intel_attached_encoder(connector);
-       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+       struct intel_dp *intel_dp = intel_attached_dp(connector);
        struct drm_device *dev = connector->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
@@ -233,13 +241,12 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
                uint8_t *recv, int recv_size)
 {
        uint32_t output_reg = intel_dp->output_reg;
-       struct drm_device *dev = intel_dp->base.enc.dev;
+       struct drm_device *dev = intel_dp->base.base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        uint32_t ch_ctl = output_reg + 0x10;
        uint32_t ch_data = ch_ctl + 4;
        int i;
        int recv_bytes;
-       uint32_t ctl;
        uint32_t status;
        uint32_t aux_clock_divider;
        int try, precharge;
@@ -247,8 +254,11 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
        /* The clock divider is based off the hrawclk,
         * and would like to run at 2MHz. So, take the
         * hrawclk value and divide by 2 and use that
+        *
+        * Note that PCH attached eDP panels should use a 125MHz input
+        * clock divider.
         */
-       if (IS_eDP(intel_dp)) {
+       if (IS_eDP(intel_dp) && !IS_PCH_eDP(intel_dp)) {
                if (IS_GEN6(dev))
                        aux_clock_divider = 200; /* SNB eDP input clock at 400Mhz */
                else
@@ -263,41 +273,43 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
        else
                precharge = 5;
 
+       if (I915_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) {
+               DRM_ERROR("dp_aux_ch not started status 0x%08x\n",
+                         I915_READ(ch_ctl));
+               return -EBUSY;
+       }
+
        /* Must try at least 3 times according to DP spec */
        for (try = 0; try < 5; try++) {
                /* Load the send data into the aux channel data registers */
-               for (i = 0; i < send_bytes; i += 4) {
-                       uint32_t    d = pack_aux(send + i, send_bytes - i);
-       
-                       I915_WRITE(ch_data + i, d);
-               }
-       
-               ctl = (DP_AUX_CH_CTL_SEND_BUSY |
-                      DP_AUX_CH_CTL_TIME_OUT_400us |
-                      (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
-                      (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
-                      (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
-                      DP_AUX_CH_CTL_DONE |
-                      DP_AUX_CH_CTL_TIME_OUT_ERROR |
-                      DP_AUX_CH_CTL_RECEIVE_ERROR);
+               for (i = 0; i < send_bytes; i += 4)
+                       I915_WRITE(ch_data + i,
+                                  pack_aux(send + i, send_bytes - i));
        
                /* Send the command and wait for it to complete */
-               I915_WRITE(ch_ctl, ctl);
-               (void) I915_READ(ch_ctl);
+               I915_WRITE(ch_ctl,
+                          DP_AUX_CH_CTL_SEND_BUSY |
+                          DP_AUX_CH_CTL_TIME_OUT_400us |
+                          (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
+                          (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
+                          (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
+                          DP_AUX_CH_CTL_DONE |
+                          DP_AUX_CH_CTL_TIME_OUT_ERROR |
+                          DP_AUX_CH_CTL_RECEIVE_ERROR);
                for (;;) {
-                       udelay(100);
                        status = I915_READ(ch_ctl);
                        if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
                                break;
+                       udelay(100);
                }
        
                /* Clear done status and any errors */
-               I915_WRITE(ch_ctl, (status |
-                               DP_AUX_CH_CTL_DONE |
-                               DP_AUX_CH_CTL_TIME_OUT_ERROR |
-                               DP_AUX_CH_CTL_RECEIVE_ERROR));
-               (void) I915_READ(ch_ctl);
-               if ((status & DP_AUX_CH_CTL_TIME_OUT_ERROR) == 0)
+               I915_WRITE(ch_ctl,
+                          status |
+                          DP_AUX_CH_CTL_DONE |
+                          DP_AUX_CH_CTL_TIME_OUT_ERROR |
+                          DP_AUX_CH_CTL_RECEIVE_ERROR);
+               if (status & DP_AUX_CH_CTL_DONE)
                        break;
        }
 
@@ -324,15 +336,12 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
        /* Unload any bytes sent back from the other side */
        recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
                      DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
-
        if (recv_bytes > recv_size)
                recv_bytes = recv_size;
        
-       for (i = 0; i < recv_bytes; i += 4) {
-               uint32_t    d = I915_READ(ch_data + i);
-
-               unpack_aux(d, recv + i, recv_bytes - i);
-       }
+       for (i = 0; i < recv_bytes; i += 4)
+               unpack_aux(I915_READ(ch_data + i),
+                          recv + i, recv_bytes - i);
 
        return recv_bytes;
 }
@@ -700,7 +709,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 {
        struct drm_device *dev = encoder->dev;
        struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-       struct drm_crtc *crtc = intel_dp->base.enc.crtc;
+       struct drm_crtc *crtc = intel_dp->base.base.crtc;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
        intel_dp->DP = (DP_VOLTAGE_0_4 |
@@ -756,13 +765,14 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
        }
 }
 
-static void ironlake_edp_panel_on (struct drm_device *dev)
+/* Returns true if the panel was already on when called */
+static bool ironlake_edp_panel_on (struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 pp;
 
        if (I915_READ(PCH_PP_STATUS) & PP_ON)
-               return;
+               return true;
 
        pp = I915_READ(PCH_PP_CONTROL);
 
@@ -771,17 +781,19 @@ static void ironlake_edp_panel_on (struct drm_device *dev)
        I915_WRITE(PCH_PP_CONTROL, pp);
        POSTING_READ(PCH_PP_CONTROL);
 
-       pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON;
+       pp |= POWER_TARGET_ON;
        I915_WRITE(PCH_PP_CONTROL, pp);
 
-       if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000, 10))
+       if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000))
                DRM_ERROR("panel on wait timed out: 0x%08x\n",
                          I915_READ(PCH_PP_STATUS));
 
-       pp &= ~(PANEL_UNLOCK_REGS | EDP_FORCE_VDD);
+       pp &= ~(PANEL_UNLOCK_REGS);
        pp |= PANEL_POWER_RESET; /* restore panel reset bit */
        I915_WRITE(PCH_PP_CONTROL, pp);
        POSTING_READ(PCH_PP_CONTROL);
+
+       return false;
 }
 
 static void ironlake_edp_panel_off (struct drm_device *dev)
@@ -799,14 +811,38 @@ static void ironlake_edp_panel_off (struct drm_device *dev)
        pp &= ~POWER_TARGET_ON;
        I915_WRITE(PCH_PP_CONTROL, pp);
 
-       if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000, 10))
+       if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000))
                DRM_ERROR("panel off wait timed out: 0x%08x\n",
                          I915_READ(PCH_PP_STATUS));
 
        /* Make sure VDD is enabled so DP AUX will work */
-       pp |= EDP_FORCE_VDD | PANEL_POWER_RESET; /* restore panel reset bit */
+       pp |= PANEL_POWER_RESET; /* restore panel reset bit */
+       I915_WRITE(PCH_PP_CONTROL, pp);
+       POSTING_READ(PCH_PP_CONTROL);
+}
+
+static void ironlake_edp_panel_vdd_on(struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       u32 pp;
+
+       pp = I915_READ(PCH_PP_CONTROL);
+       pp |= EDP_FORCE_VDD;
+       I915_WRITE(PCH_PP_CONTROL, pp);
+       POSTING_READ(PCH_PP_CONTROL);
+       msleep(300);
+}
+
+static void ironlake_edp_panel_vdd_off(struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       u32 pp;
+
+       pp = I915_READ(PCH_PP_CONTROL);
+       pp &= ~EDP_FORCE_VDD;
        I915_WRITE(PCH_PP_CONTROL, pp);
        POSTING_READ(PCH_PP_CONTROL);
+       msleep(300);
 }
 
 static void ironlake_edp_backlight_on (struct drm_device *dev)
@@ -852,6 +888,7 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder)
        dpa_ctl = I915_READ(DP_A);
        dpa_ctl |= DP_PLL_ENABLE;
        I915_WRITE(DP_A, dpa_ctl);
+       POSTING_READ(DP_A);
        udelay(200);
 }
 
@@ -862,9 +899,10 @@ static void intel_dp_prepare(struct drm_encoder *encoder)
        struct drm_i915_private *dev_priv = dev->dev_private;
        uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
-       if (IS_eDP(intel_dp)) {
+       if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
+               ironlake_edp_panel_off(dev);
                ironlake_edp_backlight_off(dev);
-               ironlake_edp_panel_on(dev);
+               ironlake_edp_panel_vdd_on(dev);
                ironlake_edp_pll_on(encoder);
        }
        if (dp_reg & DP_PORT_EN)
@@ -875,12 +913,14 @@ static void intel_dp_commit(struct drm_encoder *encoder)
 {
        struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
        struct drm_device *dev = encoder->dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       uint32_t dp_reg = I915_READ(intel_dp->output_reg);
 
-       if (!(dp_reg & DP_PORT_EN)) {
-               intel_dp_link_train(intel_dp);
-       }
+       intel_dp_start_link_train(intel_dp);
+
+       if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+               ironlake_edp_panel_on(dev);
+
+       intel_dp_complete_link_train(intel_dp);
+
        if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
                ironlake_edp_backlight_on(dev);
 }
@@ -904,9 +944,10 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
                        ironlake_edp_pll_off(encoder);
        } else {
                if (!(dp_reg & DP_PORT_EN)) {
+                       intel_dp_start_link_train(intel_dp);
                        if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
                                ironlake_edp_panel_on(dev);
-                       intel_dp_link_train(intel_dp);
+                       intel_dp_complete_link_train(intel_dp);
                        if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
                                ironlake_edp_backlight_on(dev);
                }
@@ -919,14 +960,13 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
  * link status information
  */
 static bool
-intel_dp_get_link_status(struct intel_dp *intel_dp,
-                        uint8_t link_status[DP_LINK_STATUS_SIZE])
+intel_dp_get_link_status(struct intel_dp *intel_dp)
 {
        int ret;
 
        ret = intel_dp_aux_native_read(intel_dp,
                                       DP_LANE0_1_STATUS,
-                                      link_status, DP_LINK_STATUS_SIZE);
+                                      intel_dp->link_status, DP_LINK_STATUS_SIZE);
        if (ret != DP_LINK_STATUS_SIZE)
                return false;
        return true;
@@ -1001,18 +1041,15 @@ intel_dp_pre_emphasis_max(uint8_t voltage_swing)
 }
 
 static void
-intel_get_adjust_train(struct intel_dp *intel_dp,
-                      uint8_t link_status[DP_LINK_STATUS_SIZE],
-                      int lane_count,
-                      uint8_t train_set[4])
+intel_get_adjust_train(struct intel_dp *intel_dp)
 {
        uint8_t v = 0;
        uint8_t p = 0;
        int lane;
 
-       for (lane = 0; lane < lane_count; lane++) {
-               uint8_t this_v = intel_get_adjust_request_voltage(link_status, lane);
-               uint8_t this_p = intel_get_adjust_request_pre_emphasis(link_status, lane);
+       for (lane = 0; lane < intel_dp->lane_count; lane++) {
+               uint8_t this_v = intel_get_adjust_request_voltage(intel_dp->link_status, lane);
+               uint8_t this_p = intel_get_adjust_request_pre_emphasis(intel_dp->link_status, lane);
 
                if (this_v > v)
                        v = this_v;
@@ -1027,7 +1064,7 @@ intel_get_adjust_train(struct intel_dp *intel_dp,
                p = intel_dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
 
        for (lane = 0; lane < 4; lane++)
-               train_set[lane] = v | p;
+               intel_dp->train_set[lane] = v | p;
 }
 
 static uint32_t
@@ -1118,18 +1155,18 @@ intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count
                         DP_LANE_CHANNEL_EQ_DONE|\
                         DP_LANE_SYMBOL_LOCKED)
 static bool
-intel_channel_eq_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count)
+intel_channel_eq_ok(struct intel_dp *intel_dp)
 {
        uint8_t lane_align;
        uint8_t lane_status;
        int lane;
 
-       lane_align = intel_dp_link_status(link_status,
+       lane_align = intel_dp_link_status(intel_dp->link_status,
                                          DP_LANE_ALIGN_STATUS_UPDATED);
        if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0)
                return false;
-       for (lane = 0; lane < lane_count; lane++) {
-               lane_status = intel_get_lane_status(link_status, lane);
+       for (lane = 0; lane < intel_dp->lane_count; lane++) {
+               lane_status = intel_get_lane_status(intel_dp->link_status, lane);
                if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS)
                        return false;
        }
@@ -1140,12 +1177,11 @@ static bool
 intel_dp_set_link_train(struct intel_dp *intel_dp,
                        uint32_t dp_reg_value,
                        uint8_t dp_train_pat,
-                       uint8_t train_set[4],
                        bool first)
 {
-       struct drm_device *dev = intel_dp->base.enc.dev;
+       struct drm_device *dev = intel_dp->base.base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
-       struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.enc.crtc);
+       struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc);
        int ret;
 
        I915_WRITE(intel_dp->output_reg, dp_reg_value);
@@ -1158,24 +1194,21 @@ intel_dp_set_link_train(struct intel_dp *intel_dp,
                                    dp_train_pat);
 
        ret = intel_dp_aux_native_write(intel_dp,
-                                       DP_TRAINING_LANE0_SET, train_set, 4);
+                                       DP_TRAINING_LANE0_SET, intel_dp->train_set, 4);
        if (ret != 4)
                return false;
 
        return true;
 }
 
+/* Enable corresponding port and start training pattern 1 */
 static void
-intel_dp_link_train(struct intel_dp *intel_dp)
+intel_dp_start_link_train(struct intel_dp *intel_dp)
 {
-       struct drm_device *dev = intel_dp->base.enc.dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       uint8_t train_set[4];
-       uint8_t link_status[DP_LINK_STATUS_SIZE];
+       struct drm_device *dev = intel_dp->base.base.dev;
        int i;
        uint8_t voltage;
        bool clock_recovery = false;
-       bool channel_eq = false;
        bool first = true;
        int tries;
        u32 reg;
@@ -1191,18 +1224,18 @@ intel_dp_link_train(struct intel_dp *intel_dp)
                DP &= ~DP_LINK_TRAIN_MASK_CPT;
        else
                DP &= ~DP_LINK_TRAIN_MASK;
-       memset(train_set, 0, 4);
+       memset(intel_dp->train_set, 0, 4);
        voltage = 0xff;
        tries = 0;
        clock_recovery = false;
        for (;;) {
-               /* Use train_set[0] to set the voltage and pre emphasis values */
+               /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
                uint32_t    signal_levels;
                if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
-                       signal_levels = intel_gen6_edp_signal_levels(train_set[0]);
+                       signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
                        DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
                } else {
-                       signal_levels = intel_dp_signal_levels(train_set[0], intel_dp->lane_count);
+                       signal_levels = intel_dp_signal_levels(intel_dp->train_set[0], intel_dp->lane_count);
                        DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
                }
 
@@ -1212,52 +1245,65 @@ intel_dp_link_train(struct intel_dp *intel_dp)
                        reg = DP | DP_LINK_TRAIN_PAT_1;
 
                if (!intel_dp_set_link_train(intel_dp, reg,
-                                            DP_TRAINING_PATTERN_1, train_set, first))
+                                            DP_TRAINING_PATTERN_1, first))
                        break;
                first = false;
                /* Set training pattern 1 */
 
                udelay(100);
-               if (!intel_dp_get_link_status(intel_dp, link_status))
+               if (!intel_dp_get_link_status(intel_dp))
                        break;
 
-               if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) {
+               if (intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
                        clock_recovery = true;
                        break;
                }
 
                /* Check to see if we've tried the max voltage */
                for (i = 0; i < intel_dp->lane_count; i++)
-                       if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
+                       if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
                                break;
                if (i == intel_dp->lane_count)
                        break;
 
                /* Check to see if we've tried the same voltage 5 times */
-               if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
+               if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
                        ++tries;
                        if (tries == 5)
                                break;
                } else
                        tries = 0;
-               voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+               voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
 
-               /* Compute new train_set as requested by target */
-               intel_get_adjust_train(intel_dp, link_status, intel_dp->lane_count, train_set);
+               /* Compute new intel_dp->train_set as requested by target */
+               intel_get_adjust_train(intel_dp);
        }
 
+       intel_dp->DP = DP;
+}
+
+static void
+intel_dp_complete_link_train(struct intel_dp *intel_dp)
+{
+       struct drm_device *dev = intel_dp->base.base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       bool channel_eq = false;
+       int tries;
+       u32 reg;
+       uint32_t DP = intel_dp->DP;
+
        /* channel equalization */
        tries = 0;
        channel_eq = false;
        for (;;) {
-               /* Use train_set[0] to set the voltage and pre emphasis values */
+               /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
                uint32_t    signal_levels;
 
                if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
-                       signal_levels = intel_gen6_edp_signal_levels(train_set[0]);
+                       signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
                        DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
                } else {
-                       signal_levels = intel_dp_signal_levels(train_set[0], intel_dp->lane_count);
+                       signal_levels = intel_dp_signal_levels(intel_dp->train_set[0], intel_dp->lane_count);
                        DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
                }
 
@@ -1268,15 +1314,15 @@ intel_dp_link_train(struct intel_dp *intel_dp)
 
                /* channel eq pattern */
                if (!intel_dp_set_link_train(intel_dp, reg,
-                                            DP_TRAINING_PATTERN_2, train_set,
+                                            DP_TRAINING_PATTERN_2,
                                             false))
                        break;
 
                udelay(400);
-               if (!intel_dp_get_link_status(intel_dp, link_status))
+               if (!intel_dp_get_link_status(intel_dp))
                        break;
 
-               if (intel_channel_eq_ok(link_status, intel_dp->lane_count)) {
+               if (intel_channel_eq_ok(intel_dp)) {
                        channel_eq = true;
                        break;
                }
@@ -1285,8 +1331,8 @@ intel_dp_link_train(struct intel_dp *intel_dp)
                if (tries > 5)
                        break;
 
-               /* Compute new train_set as requested by target */
-               intel_get_adjust_train(intel_dp, link_status, intel_dp->lane_count, train_set);
+               /* Compute new intel_dp->train_set as requested by target */
+               intel_get_adjust_train(intel_dp);
                ++tries;
        }
 
@@ -1304,7 +1350,7 @@ intel_dp_link_train(struct intel_dp *intel_dp)
 static void
 intel_dp_link_down(struct intel_dp *intel_dp)
 {
-       struct drm_device *dev = intel_dp->base.enc.dev;
+       struct drm_device *dev = intel_dp->base.base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        uint32_t DP = intel_dp->DP;
 
@@ -1320,14 +1366,13 @@ intel_dp_link_down(struct intel_dp *intel_dp)
        if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp)) {
                DP &= ~DP_LINK_TRAIN_MASK_CPT;
                I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT);
-               POSTING_READ(intel_dp->output_reg);
        } else {
                DP &= ~DP_LINK_TRAIN_MASK;
                I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
-               POSTING_READ(intel_dp->output_reg);
        }
+       POSTING_READ(intel_dp->output_reg);
 
-       udelay(17000);
+       msleep(17);
 
        if (IS_eDP(intel_dp))
                DP |= DP_LINK_TRAIN_OFF;
@@ -1347,27 +1392,29 @@ intel_dp_link_down(struct intel_dp *intel_dp)
 static void
 intel_dp_check_link_status(struct intel_dp *intel_dp)
 {
-       uint8_t link_status[DP_LINK_STATUS_SIZE];
-
-       if (!intel_dp->base.enc.crtc)
+       if (!intel_dp->base.base.crtc)
                return;
 
-       if (!intel_dp_get_link_status(intel_dp, link_status)) {
+       if (!intel_dp_get_link_status(intel_dp)) {
                intel_dp_link_down(intel_dp);
                return;
        }
 
-       if (!intel_channel_eq_ok(link_status, intel_dp->lane_count))
-               intel_dp_link_train(intel_dp);
+       if (!intel_channel_eq_ok(intel_dp)) {
+               intel_dp_start_link_train(intel_dp);
+               intel_dp_complete_link_train(intel_dp);
+       }
 }
 
 static enum drm_connector_status
 ironlake_dp_detect(struct drm_connector *connector)
 {
-       struct drm_encoder *encoder = intel_attached_encoder(connector);
-       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+       struct intel_dp *intel_dp = intel_attached_dp(connector);
        enum drm_connector_status status;
 
+       /* Panel needs power for AUX to work */
+       if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+               ironlake_edp_panel_vdd_on(connector->dev);
        status = connector_status_disconnected;
        if (intel_dp_aux_native_read(intel_dp,
                                     0x000, intel_dp->dpcd,
@@ -1378,6 +1425,8 @@ ironlake_dp_detect(struct drm_connector *connector)
        }
        DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0],
                      intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]);
+       if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
+               ironlake_edp_panel_vdd_off(connector->dev);
        return status;
 }
 
@@ -1388,11 +1437,10 @@ ironlake_dp_detect(struct drm_connector *connector)
  * \return false if DP port is disconnected.
  */
 static enum drm_connector_status
-intel_dp_detect(struct drm_connector *connector)
+intel_dp_detect(struct drm_connector *connector, bool force)
 {
-       struct drm_encoder *encoder = intel_attached_encoder(connector);
-       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-       struct drm_device *dev = intel_dp->base.enc.dev;
+       struct intel_dp *intel_dp = intel_attached_dp(connector);
+       struct drm_device *dev = intel_dp->base.base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        uint32_t temp, bit;
        enum drm_connector_status status;
@@ -1434,16 +1482,15 @@ intel_dp_detect(struct drm_connector *connector)
 
 static int intel_dp_get_modes(struct drm_connector *connector)
 {
-       struct drm_encoder *encoder = intel_attached_encoder(connector);
-       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
-       struct drm_device *dev = intel_dp->base.enc.dev;
+       struct intel_dp *intel_dp = intel_attached_dp(connector);
+       struct drm_device *dev = intel_dp->base.base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        int ret;
 
        /* We should parse the EDID data and find out if it has an audio sink
         */
 
-       ret = intel_ddc_get_modes(connector, intel_dp->base.ddc_bus);
+       ret = intel_ddc_get_modes(connector, &intel_dp->adapter);
        if (ret) {
                if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
                    !dev_priv->panel_fixed_mode) {
@@ -1481,6 +1528,15 @@ intel_dp_destroy (struct drm_connector *connector)
        kfree(connector);
 }
 
+static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
+{
+       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+       i2c_del_adapter(&intel_dp->adapter);
+       drm_encoder_cleanup(encoder);
+       kfree(intel_dp);
+}
+
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
        .dpms = intel_dp_dpms,
        .mode_fixup = intel_dp_mode_fixup,
@@ -1499,14 +1555,14 @@ static const struct drm_connector_funcs intel_dp_connector_funcs = {
 static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
        .get_modes = intel_dp_get_modes,
        .mode_valid = intel_dp_mode_valid,
-       .best_encoder = intel_attached_encoder,
+       .best_encoder = intel_best_encoder,
 };
 
 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
-       .destroy = intel_encoder_destroy,
+       .destroy = intel_dp_encoder_destroy,
 };
 
-void
+static void
 intel_dp_hot_plug(struct intel_encoder *intel_encoder)
 {
        struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base);
@@ -1615,12 +1671,11 @@ intel_dp_init(struct drm_device *dev, int output_reg)
        intel_dp->has_audio = false;
        intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
 
-       drm_encoder_init(dev, &intel_encoder->enc, &intel_dp_enc_funcs,
+       drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
                         DRM_MODE_ENCODER_TMDS);
-       drm_encoder_helper_add(&intel_encoder->enc, &intel_dp_helper_funcs);
+       drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs);
 
-       drm_mode_connector_attach_encoder(&intel_connector->base,
-                                         &intel_encoder->enc);
+       intel_connector_attach_encoder(intel_connector, intel_encoder);
        drm_sysfs_connector_add(connector);
 
        /* Set up the DDC bus. */
@@ -1650,7 +1705,6 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 
        intel_dp_i2c_init(intel_dp, intel_connector, name);
 
-       intel_encoder->ddc_bus = &intel_dp->adapter;
        intel_encoder->hot_plug = intel_dp_hot_plug;
 
        if (output_reg == DP_A || IS_PCH_eDP(intel_dp)) {