gma500: Add the support of display port on CDV
authorAlan Cox <alan@linux.intel.com>
Wed, 8 Aug 2012 13:54:15 +0000 (13:54 +0000)
committerDave Airlie <airlied@redhat.com>
Thu, 23 Aug 2012 23:29:06 +0000 (09:29 +1000)
Import the pieces we need in order to do DisplayPort. Don't wire them
up yet as there is work to do to integrate them.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/gma500/cdv_intel_dp.c [new file with mode: 0644]
drivers/gpu/drm/gma500/psb_intel_drv.h
drivers/gpu/drm/gma500/psb_intel_reg.h

diff --git a/drivers/gpu/drm/gma500/cdv_intel_dp.c b/drivers/gpu/drm/gma500/cdv_intel_dp.c
new file mode 100644 (file)
index 0000000..c6d545d
--- /dev/null
@@ -0,0 +1,1504 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Packard <keithp@keithp.com>
+ *
+ */
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include "drmP.h"
+#include "drm.h"
+#include "drm_crtc.h"
+#include "drm_crtc_helper.h"
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_drm.h"
+#include "psb_intel_reg.h"
+#include "drm_dp_helper.h"
+
+
+#define DP_LINK_STATUS_SIZE    6
+#define DP_LINK_CHECK_TIMEOUT  (10 * 1000)
+
+#define DP_LINK_CONFIGURATION_SIZE     9
+
+#define CDV_FAST_LINK_TRAIN    1
+
+struct psb_intel_dp {
+       uint32_t output_reg;
+       uint32_t DP;
+       uint8_t  link_configuration[DP_LINK_CONFIGURATION_SIZE];
+       bool has_audio;
+       int force_audio;
+       uint32_t color_range;
+       uint8_t link_bw;
+       uint8_t lane_count;
+       uint8_t dpcd[4];
+       struct psb_intel_output *output;
+       struct i2c_adapter adapter;
+       struct i2c_algo_dp_aux_data algo;
+       uint8_t train_set[4];
+       uint8_t link_status[DP_LINK_STATUS_SIZE];
+};
+
+struct ddi_regoff {
+       uint32_t        PreEmph1;
+       uint32_t        PreEmph2;
+       uint32_t        VSwing1;
+       uint32_t        VSwing2;
+       uint32_t        VSwing3;
+       uint32_t        VSwing4;
+       uint32_t        VSwing5;
+};
+
+static struct ddi_regoff ddi_DP_train_table[] = {
+       {.PreEmph1 = 0x812c, .PreEmph2 = 0x8124, .VSwing1 = 0x8154,
+       .VSwing2 = 0x8148, .VSwing3 = 0x814C, .VSwing4 = 0x8150,
+       .VSwing5 = 0x8158,},
+       {.PreEmph1 = 0x822c, .PreEmph2 = 0x8224, .VSwing1 = 0x8254,
+       .VSwing2 = 0x8248, .VSwing3 = 0x824C, .VSwing4 = 0x8250,
+       .VSwing5 = 0x8258,},
+};
+
+static uint32_t dp_vswing_premph_table[] = {
+        0x55338954,    0x4000,
+        0x554d8954,    0x2000,
+        0x55668954,    0,
+        0x559ac0d4,    0x6000,
+};
+/**
+ * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
+ * @intel_dp: DP struct
+ *
+ * If a CPU or PCH DP output is attached to an eDP panel, this function
+ * will return true, and false otherwise.
+ */
+static bool is_edp(struct psb_intel_output *output)
+{
+       return output->type == INTEL_OUTPUT_EDP;
+}
+
+
+static void psb_intel_dp_start_link_train(struct psb_intel_output *output);
+static void psb_intel_dp_complete_link_train(struct psb_intel_output *output);
+static void psb_intel_dp_link_down(struct psb_intel_output *output);
+
+static int
+psb_intel_dp_max_lane_count(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int max_lane_count = 4;
+
+       if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
+               max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f;
+               switch (max_lane_count) {
+               case 1: case 2: case 4:
+                       break;
+               default:
+                       max_lane_count = 4;
+               }
+       }
+       return max_lane_count;
+}
+
+static int
+psb_intel_dp_max_link_bw(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
+
+       switch (max_link_bw) {
+       case DP_LINK_BW_1_62:
+       case DP_LINK_BW_2_7:
+               break;
+       default:
+               max_link_bw = DP_LINK_BW_1_62;
+               break;
+       }
+       return max_link_bw;
+}
+
+static int
+psb_intel_dp_link_clock(uint8_t link_bw)
+{
+       if (link_bw == DP_LINK_BW_2_7)
+               return 270000;
+       else
+               return 162000;
+}
+
+static int
+psb_intel_dp_link_required(int pixel_clock, int bpp)
+{
+       return (pixel_clock * bpp + 7) / 8;
+}
+
+static int
+psb_intel_dp_max_data_rate(int max_link_clock, int max_lanes)
+{
+       return (max_link_clock * max_lanes * 19) / 20;
+}
+
+static int
+psb_intel_dp_mode_valid(struct drm_connector *connector,
+                   struct drm_display_mode *mode)
+{
+       struct psb_intel_output *output = to_psb_intel_output(connector);
+       struct drm_device *dev = connector->dev;
+       struct drm_psb_private *dev_priv = dev->dev_private;
+       int max_link_clock = psb_intel_dp_link_clock(psb_intel_dp_max_link_bw(output));
+       int max_lanes = psb_intel_dp_max_lane_count(output);
+
+       if (is_edp(output) && dev_priv->panel_fixed_mode) {
+               if (mode->hdisplay > dev_priv->panel_fixed_mode->hdisplay)
+                       return MODE_PANEL;
+
+               if (mode->vdisplay > dev_priv->panel_fixed_mode->vdisplay)
+                       return MODE_PANEL;
+       }
+
+       /* only refuse the mode on non eDP since we have seen some weird eDP panels
+          which are outside spec tolerances but somehow work by magic */
+       if (!is_edp(output) &&
+           (psb_intel_dp_link_required(mode->clock, 24)
+            > psb_intel_dp_max_data_rate(max_link_clock, max_lanes)))
+               return MODE_CLOCK_HIGH;
+
+       if (mode->clock < 10000)
+               return MODE_CLOCK_LOW;
+
+       return MODE_OK;
+}
+
+static uint32_t
+pack_aux(uint8_t *src, int src_bytes)
+{
+       int     i;
+       uint32_t v = 0;
+
+       if (src_bytes > 4)
+               src_bytes = 4;
+       for (i = 0; i < src_bytes; i++)
+               v |= ((uint32_t) src[i]) << ((3-i) * 8);
+       return v;
+}
+
+static void
+unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
+{
+       int i;
+       if (dst_bytes > 4)
+               dst_bytes = 4;
+       for (i = 0; i < dst_bytes; i++)
+               dst[i] = src >> ((3-i) * 8);
+}
+
+static int
+psb_intel_dp_aux_ch(struct psb_intel_output *output,
+               uint8_t *send, int send_bytes,
+               uint8_t *recv, int recv_size)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       uint32_t output_reg = intel_dp->output_reg;
+       struct drm_device *dev = output->base.dev;
+       uint32_t ch_ctl = output_reg + 0x10;
+       uint32_t ch_data = ch_ctl + 4;
+       int i;
+       int recv_bytes;
+       uint32_t status;
+       uint32_t aux_clock_divider;
+       int try, precharge;
+
+       /* 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
+        * On CDV platform it uses 200MHz as hrawclk.
+        *
+        */
+       aux_clock_divider = 200 / 2;
+
+       precharge = 4;
+
+       if (REG_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) {
+               DRM_ERROR("dp_aux_ch not started status 0x%08x\n",
+                         REG_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)
+                       REG_WRITE(ch_data + i,
+                                  pack_aux(send + i, send_bytes - i));
+       
+               /* Send the command and wait for it to complete */
+               REG_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 (;;) {
+                       status = REG_READ(ch_ctl);
+                       if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
+                               break;
+                       udelay(100);
+               }
+       
+               /* Clear done status and any errors */
+               REG_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;
+       }
+
+       if ((status & DP_AUX_CH_CTL_DONE) == 0) {
+               DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
+               return -EBUSY;
+       }
+
+       /* Check for timeout or receive error.
+        * Timeouts occur when the sink is not connected
+        */
+       if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
+               DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
+               return -EIO;
+       }
+
+       /* Timeouts occur when the device isn't connected, so they're
+        * "normal" -- don't fill the kernel log with these */
+       if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
+               DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
+               return -ETIMEDOUT;
+       }
+
+       /* 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)
+               unpack_aux(REG_READ(ch_data + i),
+                          recv + i, recv_bytes - i);
+
+       return recv_bytes;
+}
+
+/* Write data to the aux channel in native mode */
+static int
+psb_intel_dp_aux_native_write(struct psb_intel_output *output,
+                         uint16_t address, uint8_t *send, int send_bytes)
+{
+       int ret;
+       uint8_t msg[20];
+       int msg_bytes;
+       uint8_t ack;
+
+       if (send_bytes > 16)
+               return -1;
+       msg[0] = AUX_NATIVE_WRITE << 4;
+       msg[1] = address >> 8;
+       msg[2] = address & 0xff;
+       msg[3] = send_bytes - 1;
+       memcpy(&msg[4], send, send_bytes);
+       msg_bytes = send_bytes + 4;
+       for (;;) {
+               ret = psb_intel_dp_aux_ch(output, msg, msg_bytes, &ack, 1);
+               if (ret < 0)
+                       return ret;
+               if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
+                       break;
+               else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
+                       udelay(100);
+               else
+                       return -EIO;
+       }
+       return send_bytes;
+}
+
+/* Write a single byte to the aux channel in native mode */
+static int
+psb_intel_dp_aux_native_write_1(struct psb_intel_output *output,
+                           uint16_t address, uint8_t byte)
+{
+       return psb_intel_dp_aux_native_write(output, address, &byte, 1);
+}
+
+/* read bytes from a native aux channel */
+static int
+psb_intel_dp_aux_native_read(struct psb_intel_output *output,
+                        uint16_t address, uint8_t *recv, int recv_bytes)
+{
+       uint8_t msg[4];
+       int msg_bytes;
+       uint8_t reply[20];
+       int reply_bytes;
+       uint8_t ack;
+       int ret;
+
+       msg[0] = AUX_NATIVE_READ << 4;
+       msg[1] = address >> 8;
+       msg[2] = address & 0xff;
+       msg[3] = recv_bytes - 1;
+
+       msg_bytes = 4;
+       reply_bytes = recv_bytes + 1;
+
+       for (;;) {
+               ret = psb_intel_dp_aux_ch(output, msg, msg_bytes,
+                                     reply, reply_bytes);
+               if (ret == 0)
+                       return -EPROTO;
+               if (ret < 0)
+                       return ret;
+               ack = reply[0];
+               if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) {
+                       memcpy(recv, reply + 1, ret - 1);
+                       return ret - 1;
+               }
+               else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
+                       udelay(100);
+               else
+                       return -EIO;
+       }
+}
+
+static int
+psb_intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
+                   uint8_t write_byte, uint8_t *read_byte)
+{
+       struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
+       struct psb_intel_dp *intel_dp = container_of(adapter,
+                                               struct psb_intel_dp,
+                                               adapter);
+       struct psb_intel_output *output = intel_dp->output;
+       uint16_t address = algo_data->address;
+       uint8_t msg[5];
+       uint8_t reply[2];
+       unsigned retry;
+       int msg_bytes;
+       int reply_bytes;
+       int ret;
+
+       /* Set up the command byte */
+       if (mode & MODE_I2C_READ)
+               msg[0] = AUX_I2C_READ << 4;
+       else
+               msg[0] = AUX_I2C_WRITE << 4;
+
+       if (!(mode & MODE_I2C_STOP))
+               msg[0] |= AUX_I2C_MOT << 4;
+
+       msg[1] = address >> 8;
+       msg[2] = address;
+
+       switch (mode) {
+       case MODE_I2C_WRITE:
+               msg[3] = 0;
+               msg[4] = write_byte;
+               msg_bytes = 5;
+               reply_bytes = 1;
+               break;
+       case MODE_I2C_READ:
+               msg[3] = 0;
+               msg_bytes = 4;
+               reply_bytes = 2;
+               break;
+       default:
+               msg_bytes = 3;
+               reply_bytes = 1;
+               break;
+       }
+
+       for (retry = 0; retry < 5; retry++) {
+               ret = psb_intel_dp_aux_ch(output,
+                                     msg, msg_bytes,
+                                     reply, reply_bytes);
+               if (ret < 0) {
+                       DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
+                       return ret;
+               }
+
+               switch (reply[0] & AUX_NATIVE_REPLY_MASK) {
+               case AUX_NATIVE_REPLY_ACK:
+                       /* I2C-over-AUX Reply field is only valid
+                        * when paired with AUX ACK.
+                        */
+                       break;
+               case AUX_NATIVE_REPLY_NACK:
+                       DRM_DEBUG_KMS("aux_ch native nack\n");
+                       return -EREMOTEIO;
+               case AUX_NATIVE_REPLY_DEFER:
+                       udelay(100);
+                       continue;
+               default:
+                       DRM_ERROR("aux_ch invalid native reply 0x%02x\n",
+                                 reply[0]);
+                       return -EREMOTEIO;
+               }
+
+               switch (reply[0] & AUX_I2C_REPLY_MASK) {
+               case AUX_I2C_REPLY_ACK:
+                       if (mode == MODE_I2C_READ) {
+                               *read_byte = reply[1];
+                       }
+                       return reply_bytes - 1;
+               case AUX_I2C_REPLY_NACK:
+                       DRM_DEBUG_KMS("aux_i2c nack\n");
+                       return -EREMOTEIO;
+               case AUX_I2C_REPLY_DEFER:
+                       DRM_DEBUG_KMS("aux_i2c defer\n");
+                       udelay(100);
+                       break;
+               default:
+                       DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]);
+                       return -EREMOTEIO;
+               }
+       }
+
+       DRM_ERROR("too many retries, giving up\n");
+       return -EREMOTEIO;
+}
+
+static int
+psb_intel_dp_i2c_init(struct psb_intel_output *output, const char *name)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       DRM_DEBUG_KMS("i2c_init %s\n", name);
+       intel_dp->algo.running = false;
+       intel_dp->algo.address = 0;
+       intel_dp->algo.aux_ch = psb_intel_dp_i2c_aux_ch;
+
+       memset(&intel_dp->adapter, '\0', sizeof (intel_dp->adapter));
+       intel_dp->adapter.owner = THIS_MODULE;
+       intel_dp->adapter.class = I2C_CLASS_DDC;
+       strncpy (intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1);
+       intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0';
+       intel_dp->adapter.algo_data = &intel_dp->algo;
+       intel_dp->adapter.dev.parent = &output->base.kdev;
+
+       return i2c_dp_aux_add_bus(&intel_dp->adapter);
+}
+
+static bool
+psb_intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
+                   struct drm_display_mode *adjusted_mode)
+{
+       struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int lane_count, clock;
+       int max_lane_count = psb_intel_dp_max_lane_count(output);
+       int max_clock = psb_intel_dp_max_link_bw(output) == DP_LINK_BW_2_7 ? 1 : 0;
+       static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
+
+
+       for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
+               for (clock = max_clock; clock >= 0; clock--) {
+                       int link_avail = psb_intel_dp_max_data_rate(psb_intel_dp_link_clock(bws[clock]), lane_count);
+
+                       if (psb_intel_dp_link_required(mode->clock, 24)
+                                       <= link_avail) {
+                               intel_dp->link_bw = bws[clock];
+                               intel_dp->lane_count = lane_count;
+                               adjusted_mode->clock = psb_intel_dp_link_clock(intel_dp->link_bw);
+                               DRM_DEBUG_KMS("Display port link bw %02x lane "
+                                               "count %d clock %d\n",
+                                      intel_dp->link_bw, intel_dp->lane_count,
+                                      adjusted_mode->clock);
+                               return true;
+                       }
+               }
+       }
+
+       return false;
+}
+
+struct psb_intel_dp_m_n {
+       uint32_t        tu;
+       uint32_t        gmch_m;
+       uint32_t        gmch_n;
+       uint32_t        link_m;
+       uint32_t        link_n;
+};
+
+static void
+psb_intel_reduce_ratio(uint32_t *num, uint32_t *den)
+{
+       /*
+       while (*num > 0xffffff || *den > 0xffffff) {
+               *num >>= 1;
+               *den >>= 1;
+       }*/
+       uint64_t value, m;
+       m = *num;
+       value = m * (0x800000);
+       m = do_div(value, *den);
+       *num = value;
+       *den = 0x800000;
+}
+
+static void
+psb_intel_dp_compute_m_n(int bpp,
+                    int nlanes,
+                    int pixel_clock,
+                    int link_clock,
+                    struct psb_intel_dp_m_n *m_n)
+{
+       m_n->tu = 64;
+       m_n->gmch_m = (pixel_clock * bpp + 7) >> 3;
+       m_n->gmch_n = link_clock * nlanes;
+       psb_intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
+       m_n->link_m = pixel_clock;
+       m_n->link_n = link_clock;
+       psb_intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
+}
+
+void
+psb_intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
+                struct drm_display_mode *adjusted_mode)
+{
+       struct drm_device *dev = crtc->dev;
+       struct drm_mode_config *mode_config = &dev->mode_config;
+       struct drm_encoder *encoder;
+       struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
+       int lane_count = 4, bpp = 24;
+       struct psb_intel_dp_m_n m_n;
+       int pipe = intel_crtc->pipe;
+
+       /*
+        * Find the lane count in the intel_encoder private
+        */
+       list_for_each_entry(encoder, &mode_config->encoder_list, head) {
+               struct psb_intel_output *intel_output;
+               struct psb_intel_dp *intel_dp;
+
+               if (encoder->crtc != crtc)
+                       continue;
+
+               intel_output = enc_to_psb_intel_output(encoder);
+               intel_dp = intel_output->dev_priv;
+               if (intel_output->type == INTEL_OUTPUT_DISPLAYPORT) {
+                       lane_count = intel_dp->lane_count;
+                       break;
+               } else if (is_edp(intel_output)) {
+                       lane_count = intel_dp->lane_count;
+                       break;
+               }
+       }
+
+       /*
+        * Compute the GMCH and Link ratios. The '3' here is
+        * the number of bytes_per_pixel post-LUT, which we always
+        * set up for 8-bits of R/G/B, or 3 bytes total.
+        */
+       psb_intel_dp_compute_m_n(bpp, lane_count,
+                            mode->clock, adjusted_mode->clock, &m_n);
+
+       {
+               REG_WRITE(PIPE_GMCH_DATA_M(pipe),
+                          ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
+                          m_n.gmch_m);
+               REG_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n);
+               REG_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m);
+               REG_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n);
+       }
+}
+
+static void
+psb_intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
+                 struct drm_display_mode *adjusted_mode)
+{
+       struct psb_intel_output *intel_output = enc_to_psb_intel_output(encoder);
+       struct drm_crtc *crtc = encoder->crtc;
+       struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
+       struct psb_intel_dp *intel_dp = intel_output->dev_priv;
+
+
+       intel_dp->DP = DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
+       intel_dp->DP |= intel_dp->color_range;
+
+       if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+               intel_dp->DP |= DP_SYNC_HS_HIGH;
+       if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+               intel_dp->DP |= DP_SYNC_VS_HIGH;
+
+       intel_dp->DP |= DP_LINK_TRAIN_OFF;
+
+       switch (intel_dp->lane_count) {
+       case 1:
+               intel_dp->DP |= DP_PORT_WIDTH_1;
+               break;
+       case 2:
+               intel_dp->DP |= DP_PORT_WIDTH_2;
+               break;
+       case 4:
+               intel_dp->DP |= DP_PORT_WIDTH_4;
+               break;
+       }
+       if (intel_dp->has_audio)
+               intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
+
+       memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
+       intel_dp->link_configuration[0] = intel_dp->link_bw;
+       intel_dp->link_configuration[1] = intel_dp->lane_count;
+
+       /*
+        * Check for DPCD version > 1.1 and enhanced framing support
+        */
+       if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
+           (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) {
+               intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+               intel_dp->DP |= DP_ENHANCED_FRAMING;
+       }
+
+       /* CPT DP's pipe select is decided in TRANS_DP_CTL */
+       if (intel_crtc->pipe == 1)
+               intel_dp->DP |= DP_PIPEB_SELECT;
+
+       DRM_DEBUG_KMS("DP expected reg is %x\n", intel_dp->DP);
+}
+
+
+/* If the sink supports it, try to set the power state appropriately */
+static void psb_intel_dp_sink_dpms(struct psb_intel_output *output, int mode)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int ret, i;
+
+       /* Should have a valid DPCD by this point */
+       if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
+               return;
+
+       if (mode != DRM_MODE_DPMS_ON) {
+               ret = psb_intel_dp_aux_native_write_1(output, DP_SET_POWER,
+                                                 DP_SET_POWER_D3);
+               if (ret != 1)
+                       DRM_DEBUG_DRIVER("failed to write sink power state\n");
+       } else {
+               /*
+                * When turning on, we need to retry for 1ms to give the sink
+                * time to wake up.
+                */
+               for (i = 0; i < 3; i++) {
+                       ret = psb_intel_dp_aux_native_write_1(output,
+                                                         DP_SET_POWER,
+                                                         DP_SET_POWER_D0);
+                       if (ret == 1)
+                               break;
+                       udelay(1000);
+               }
+       }
+}
+
+static void psb_intel_dp_prepare(struct drm_encoder *encoder)
+{
+       struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
+
+       /* Wake up the sink first */
+       psb_intel_dp_sink_dpms(output, DRM_MODE_DPMS_ON);
+
+       psb_intel_dp_link_down(output);
+}
+
+static void psb_intel_dp_commit(struct drm_encoder *encoder)
+{
+       struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
+
+       psb_intel_dp_start_link_train(output);
+
+       psb_intel_dp_complete_link_train(output);
+
+}
+
+static void
+psb_intel_dp_dpms(struct drm_encoder *encoder, int mode)
+{
+       struct psb_intel_output *intel_output = enc_to_psb_intel_output(encoder);
+       struct psb_intel_dp *intel_dp = intel_output->dev_priv;
+       struct drm_device *dev = encoder->dev;
+       uint32_t dp_reg = REG_READ(intel_dp->output_reg);
+
+       if (mode != DRM_MODE_DPMS_ON) {
+               psb_intel_dp_sink_dpms(intel_output, mode);
+               psb_intel_dp_link_down(intel_output);
+       } else {
+               psb_intel_dp_sink_dpms(intel_output, mode);
+               if (!(dp_reg & DP_PORT_EN)) {
+                       psb_intel_dp_start_link_train(intel_output);
+                       psb_intel_dp_complete_link_train(intel_output);
+               }
+       }
+}
+
+/*
+ * Native read with retry for link status and receiver capability reads for
+ * cases where the sink may still be asleep.
+ */
+static bool
+psb_intel_dp_aux_native_read_retry(struct psb_intel_output *output, uint16_t address,
+                              uint8_t *recv, int recv_bytes)
+{
+       int ret, i;
+
+       /*
+        * Sinks are *supposed* to come up within 1ms from an off state,
+        * but we're also supposed to retry 3 times per the spec.
+        */
+       for (i = 0; i < 3; i++) {
+               ret = psb_intel_dp_aux_native_read(output, address, recv,
+                                              recv_bytes);
+               if (ret == recv_bytes)
+                       return true;
+               udelay(1000);
+       }
+
+       return false;
+}
+
+/*
+ * Fetch AUX CH registers 0x202 - 0x207 which contain
+ * link status information
+ */
+static bool
+psb_intel_dp_get_link_status(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       return psb_intel_dp_aux_native_read_retry(output,
+                                             DP_LANE0_1_STATUS,
+                                             intel_dp->link_status,
+                                             DP_LINK_STATUS_SIZE);
+}
+
+static uint8_t
+psb_intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
+                    int r)
+{
+       return link_status[r - DP_LANE0_1_STATUS];
+}
+
+static uint8_t
+psb_intel_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE],
+                                int lane)
+{
+       int         i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
+       int         s = ((lane & 1) ?
+                        DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT :
+                        DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT);
+       uint8_t l = psb_intel_dp_link_status(link_status, i);
+
+       return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
+}
+
+static uint8_t
+psb_intel_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE],
+                                     int lane)
+{
+       int         i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
+       int         s = ((lane & 1) ?
+                        DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT :
+                        DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT);
+       uint8_t l = psb_intel_dp_link_status(link_status, i);
+
+       return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT;
+}
+
+
+#if 0
+static char    *voltage_names[] = {
+       "0.4V", "0.6V", "0.8V", "1.2V"
+};
+static char    *pre_emph_names[] = {
+       "0dB", "3.5dB", "6dB", "9.5dB"
+};
+static char    *link_train_names[] = {
+       "pattern 1", "pattern 2", "idle", "off"
+};
+#endif
+
+#define CDV_DP_VOLTAGE_MAX         DP_TRAIN_VOLTAGE_SWING_1200
+/*
+static uint8_t
+psb_intel_dp_pre_emphasis_max(uint8_t voltage_swing)
+{
+       switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
+       case DP_TRAIN_VOLTAGE_SWING_400:
+               return DP_TRAIN_PRE_EMPHASIS_6;
+       case DP_TRAIN_VOLTAGE_SWING_600:
+               return DP_TRAIN_PRE_EMPHASIS_6;
+       case DP_TRAIN_VOLTAGE_SWING_800:
+               return DP_TRAIN_PRE_EMPHASIS_3_5;
+       case DP_TRAIN_VOLTAGE_SWING_1200:
+       default:
+               return DP_TRAIN_PRE_EMPHASIS_0;
+       }
+}
+*/
+static void
+psb_intel_get_adjust_train(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       uint8_t v = 0;
+       uint8_t p = 0;
+       int lane;
+
+       for (lane = 0; lane < intel_dp->lane_count; lane++) {
+               uint8_t this_v = psb_intel_get_adjust_request_voltage(intel_dp->link_status, lane);
+               uint8_t this_p = psb_intel_get_adjust_request_pre_emphasis(intel_dp->link_status, lane);
+
+               if (this_v > v)
+                       v = this_v;
+               if (this_p > p)
+                       p = this_p;
+       }
+       
+       if (v >= CDV_DP_VOLTAGE_MAX)
+               v = CDV_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED;
+
+       if (p == DP_TRAIN_PRE_EMPHASIS_MASK)
+               p |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+               
+       for (lane = 0; lane < 4; lane++)
+               intel_dp->train_set[lane] = v | p;
+}
+
+
+static uint8_t
+psb_intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
+                     int lane)
+{
+       int i = DP_LANE0_1_STATUS + (lane >> 1);
+       int s = (lane & 1) * 4;
+       uint8_t l = psb_intel_dp_link_status(link_status, i);
+
+       return (l >> s) & 0xf;
+}
+
+/* Check for clock recovery is done on all channels */
+static bool
+psb_intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count)
+{
+       int lane;
+       uint8_t lane_status;
+
+       for (lane = 0; lane < lane_count; lane++) {
+               lane_status = psb_intel_get_lane_status(link_status, lane);
+               if ((lane_status & DP_LANE_CR_DONE) == 0)
+                       return false;
+       }
+       return true;
+}
+
+/* Check to see if channel eq is done on all channels */
+#define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\
+                        DP_LANE_CHANNEL_EQ_DONE|\
+                        DP_LANE_SYMBOL_LOCKED)
+static bool
+psb_intel_channel_eq_ok(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       uint8_t lane_align;
+       uint8_t lane_status;
+       int lane;
+
+       lane_align = psb_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 < intel_dp->lane_count; lane++) {
+               lane_status = psb_intel_get_lane_status(intel_dp->link_status, lane);
+               if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS)
+                       return false;
+       }
+       return true;
+}
+
+static bool
+psb_intel_dp_set_link_train(struct psb_intel_output *output,
+                       uint32_t dp_reg_value,
+                       uint8_t dp_train_pat)
+{
+       
+       struct drm_device *dev = output->base.dev;
+       int ret;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+
+       REG_WRITE(intel_dp->output_reg, dp_reg_value);
+       REG_READ(intel_dp->output_reg);
+
+       ret = psb_intel_dp_aux_native_write_1(output,
+                                   DP_TRAINING_PATTERN_SET,
+                                   dp_train_pat);
+
+       if (ret != 1) {
+               DRM_DEBUG_KMS("Failure in setting link pattern %x\n",
+                               dp_train_pat);
+               return false;
+       }
+
+       return true;
+}
+
+
+static bool
+psb_intel_dplink_set_level(struct psb_intel_output *output,
+                       uint8_t dp_train_pat)
+{
+       
+       int ret;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+
+       ret = psb_intel_dp_aux_native_write(output,
+                                       DP_TRAINING_LANE0_SET,
+                                       intel_dp->train_set,
+                                       intel_dp->lane_count);
+
+       if (ret != intel_dp->lane_count) {
+               DRM_DEBUG_KMS("Failure in setting level %d, lane_cnt= %d\n",
+                               intel_dp->train_set[0], intel_dp->lane_count);
+               return false;
+       }
+       return true;
+}
+
+static void
+psb_intel_dp_set_vswing_premph(struct psb_intel_output *output, uint8_t signal_level)
+{
+       struct drm_device *dev = output->base.dev;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       struct ddi_regoff *ddi_reg;
+       int vswing, premph, index;
+
+       if (intel_dp->output_reg == DP_B)
+               ddi_reg = &ddi_DP_train_table[0];
+       else
+               ddi_reg = &ddi_DP_train_table[1];
+
+       vswing = (signal_level & DP_TRAIN_VOLTAGE_SWING_MASK);
+       premph = ((signal_level & DP_TRAIN_PRE_EMPHASIS_MASK)) >>
+                               DP_TRAIN_PRE_EMPHASIS_SHIFT;
+
+       if (vswing + premph > 3)
+               return;
+#ifdef CDV_FAST_LINK_TRAIN
+       return;
+#endif
+       DRM_DEBUG_KMS("Test2\n");
+       //return ;
+       psb_sb_reset(dev);
+       /* ;Swing voltage programming
+        ;gfx_dpio_set_reg(0xc058, 0x0505313A) */
+       psb_sb_write(dev, ddi_reg->VSwing5, 0x0505313A);
+
+       /* ;gfx_dpio_set_reg(0x8154, 0x43406055) */
+       psb_sb_write(dev, ddi_reg->VSwing1, 0x43406055);
+
+       /* ;gfx_dpio_set_reg(0x8148, 0x55338954)
+        * The VSwing_PreEmph table is also considered based on the vswing/premp
+        */
+       index = (vswing + premph) * 2;
+       if (premph == 1 && vswing == 1) {
+               psb_sb_write(dev, ddi_reg->VSwing2, 0x055738954);
+       } else
+               psb_sb_write(dev, ddi_reg->VSwing2, dp_vswing_premph_table[index]);
+
+       /* ;gfx_dpio_set_reg(0x814c, 0x40802040) */
+       if ((vswing + premph) == DP_TRAIN_VOLTAGE_SWING_1200)
+               psb_sb_write(dev, ddi_reg->VSwing3, 0x70802040);
+       else
+               psb_sb_write(dev, ddi_reg->VSwing3, 0x40802040);
+
+       /* ;gfx_dpio_set_reg(0x8150, 0x2b405555) */
+       //psb_sb_write(dev, ddi_reg->VSwing4, 0x2b405555);
+
+       /* ;gfx_dpio_set_reg(0x8154, 0xc3406055) */
+       psb_sb_write(dev, ddi_reg->VSwing1, 0xc3406055);
+
+       /* ;Pre emphasis programming
+        * ;gfx_dpio_set_reg(0xc02c, 0x1f030040)
+        */
+       psb_sb_write(dev, ddi_reg->PreEmph1, 0x1f030040);
+
+       /* ;gfx_dpio_set_reg(0x8124, 0x00004000) */
+       index = 2 * premph + 1;
+       psb_sb_write(dev, ddi_reg->PreEmph2, dp_vswing_premph_table[index]);
+       return; 
+}
+
+
+/* Enable corresponding port and start training pattern 1 */
+static void
+psb_intel_dp_start_link_train(struct psb_intel_output *output)
+{
+       struct drm_device *dev = output->base.dev;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int i;
+       uint8_t voltage;
+       bool clock_recovery = false;
+       int tries;
+       u32 reg;
+       uint32_t DP = intel_dp->DP;
+
+       DP |= DP_PORT_EN;
+               DP &= ~DP_LINK_TRAIN_MASK;
+               
+               reg = DP;       
+               reg |= DP_LINK_TRAIN_PAT_1;
+       /* Enable output, wait for it to become active */
+       REG_WRITE(intel_dp->output_reg, reg);
+       REG_READ(intel_dp->output_reg);
+       psb_intel_wait_for_vblank(dev);
+
+       DRM_DEBUG_KMS("Link config\n");
+       /* Write the link configuration data */
+       psb_intel_dp_aux_native_write(output, DP_LINK_BW_SET,
+                                 intel_dp->link_configuration,
+                                 2);
+
+       memset(intel_dp->train_set, 0, 4);
+       voltage = 0;
+       tries = 0;
+       clock_recovery = false;
+
+       DRM_DEBUG_KMS("Start train\n");
+               reg = DP | DP_LINK_TRAIN_PAT_1;
+
+
+       for (;;) {
+               /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
+
+               if (!psb_intel_dp_set_link_train(output, reg, DP_TRAINING_PATTERN_1)) {
+                       DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 1\n");
+               }
+               psb_intel_dp_set_vswing_premph(output, intel_dp->train_set[0]);
+               /* Set training pattern 1 */
+
+               psb_intel_dplink_set_level(output, DP_TRAINING_PATTERN_1);
+
+               udelay(200);
+               if (!psb_intel_dp_get_link_status(output))
+                       break;
+
+               if (psb_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
+                       DRM_DEBUG_KMS("PT1 train is done\n");
+                       clock_recovery = true;
+                       break;
+               }
+
+               /* Check to see if we've tried the max voltage */
+               for (i = 0; i < intel_dp->lane_count; i++)
+                       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 ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
+                       ++tries;
+                       if (tries == 5)
+                               break;
+               } else
+                       tries = 0;
+               voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+
+               /* Compute new intel_dp->train_set as requested by target */
+               psb_intel_get_adjust_train(output);
+
+       }
+
+       if (!clock_recovery) {
+               DRM_DEBUG_KMS("failure in DP patter 1 training, train set %x\n", intel_dp->train_set[0]);
+       }
+       
+       intel_dp->DP = DP;
+}
+
+static void
+psb_intel_dp_complete_link_train(struct psb_intel_output *output)
+{
+       struct drm_device *dev = output->base.dev;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       bool channel_eq = false;
+       int tries, cr_tries;
+       u32 reg;
+       uint32_t DP = intel_dp->DP;
+
+       /* channel equalization */
+       tries = 0;
+       cr_tries = 0;
+       channel_eq = false;
+
+       DRM_DEBUG_KMS("\n");
+               reg = DP | DP_LINK_TRAIN_PAT_2;
+
+       for (;;) {
+               /* channel eq pattern */
+               if (!psb_intel_dp_set_link_train(output, reg,
+                                            DP_TRAINING_PATTERN_2)) {
+                       DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 2\n");
+               }
+               /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
+
+               if (cr_tries > 5) {
+                       DRM_ERROR("failed to train DP, aborting\n");
+                       psb_intel_dp_link_down(output);
+                       break;
+               }
+
+               psb_intel_dp_set_vswing_premph(output, intel_dp->train_set[0]);
+
+               psb_intel_dplink_set_level(output, DP_TRAINING_PATTERN_2);
+
+               udelay(1000);
+               if (!psb_intel_dp_get_link_status(output))
+                       break;
+
+               /* Make sure clock is still ok */
+               if (!psb_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
+                       psb_intel_dp_start_link_train(output);
+                       cr_tries++;
+                       continue;
+               }
+
+               if (psb_intel_channel_eq_ok(output)) {
+                       DRM_DEBUG_KMS("PT2 train is done\n");
+                       channel_eq = true;
+                       break;
+               }
+
+               /* Try 5 times, then try clock recovery if that fails */
+               if (tries > 5) {
+                       psb_intel_dp_link_down(output);
+                       psb_intel_dp_start_link_train(output);
+                       tries = 0;
+                       cr_tries++;
+                       continue;
+               }
+
+               /* Compute new intel_dp->train_set as requested by target */
+               psb_intel_get_adjust_train(output);
+               ++tries;
+
+       }
+
+       reg = DP | DP_LINK_TRAIN_OFF;
+
+       REG_WRITE(intel_dp->output_reg, reg);
+       REG_READ(intel_dp->output_reg);
+       psb_intel_dp_aux_native_write_1(output,
+                                   DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE);
+}
+
+static void
+psb_intel_dp_link_down(struct psb_intel_output *output)
+{
+       struct drm_device *dev = output->base.dev;
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       uint32_t DP = intel_dp->DP;
+
+       if ((REG_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)
+               return;
+
+       DRM_DEBUG_KMS("\n");
+
+
+       {
+               DP &= ~DP_LINK_TRAIN_MASK;
+               REG_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
+       }
+       REG_READ(intel_dp->output_reg);
+
+       msleep(17);
+
+       REG_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
+       REG_READ(intel_dp->output_reg);
+}
+
+static enum drm_connector_status
+cdv_dp_detect(struct psb_intel_output *output)
+{
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       enum drm_connector_status status;
+
+       status = connector_status_disconnected;
+       if (psb_intel_dp_aux_native_read(output, 0x000, intel_dp->dpcd,
+                                    sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
+       {
+               if (intel_dp->dpcd[DP_DPCD_REV] != 0)
+                       status = connector_status_connected;
+       }
+       if (status == connector_status_connected)
+               DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n",
+                       intel_dp->dpcd[0], intel_dp->dpcd[1],
+                       intel_dp->dpcd[2], intel_dp->dpcd[3]);
+       return status;
+}
+
+/**
+ * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
+ *
+ * \return true if DP port is connected.
+ * \return false if DP port is disconnected.
+ */
+static enum drm_connector_status
+psb_intel_dp_detect(struct drm_connector *connector, bool force)
+{
+       struct psb_intel_output *output = to_psb_intel_output(connector);
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       enum drm_connector_status status;
+       struct edid *edid = NULL;
+
+       intel_dp->has_audio = false;
+
+       status = cdv_dp_detect(output);
+       if (status != connector_status_connected)
+               return status;
+
+       if (intel_dp->force_audio) {
+               intel_dp->has_audio = intel_dp->force_audio > 0;
+       } else {
+               edid = drm_get_edid(connector, &intel_dp->adapter);
+               if (edid) {
+                       intel_dp->has_audio = drm_detect_monitor_audio(edid);
+                       connector->display_info.raw_edid = NULL;
+                       kfree(edid);
+               }
+       }
+
+       return connector_status_connected;
+}
+
+static int psb_intel_dp_get_modes(struct drm_connector *connector)
+{
+       struct psb_intel_output *intel_output = to_psb_intel_output(connector);
+       struct psb_intel_dp *intel_dp = intel_output->dev_priv;
+       struct edid *edid = NULL;
+       int ret = 0;
+
+
+       edid = drm_get_edid(&intel_output->base,
+                               &intel_dp->adapter);
+       if (edid) {
+               drm_mode_connector_update_edid_property(&intel_output->
+                                                       base, edid);
+               ret = drm_add_edid_modes(&intel_output->base, edid);
+               kfree(edid);
+       }
+
+       return ret;
+}
+
+static bool
+psb_intel_dp_detect_audio(struct drm_connector *connector)
+{
+       struct psb_intel_output *output = to_psb_intel_output(connector);
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       struct edid *edid;
+       bool has_audio = false;
+
+       edid = drm_get_edid(connector, &intel_dp->adapter);
+       if (edid) {
+               has_audio = drm_detect_monitor_audio(edid);
+
+               connector->display_info.raw_edid = NULL;
+               kfree(edid);
+       }
+
+       return has_audio;
+}
+
+static int
+psb_intel_dp_set_property(struct drm_connector *connector,
+                     struct drm_property *property,
+                     uint64_t val)
+{
+       struct drm_psb_private *dev_priv = connector->dev->dev_private;
+       struct psb_intel_output *output = to_psb_intel_output(connector);
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+       int ret;
+
+       ret = drm_connector_property_set_value(connector, property, val);
+       if (ret)
+               return ret;
+
+       if (property == dev_priv->force_audio_property) {
+               int i = val;
+               bool has_audio;
+
+               if (i == intel_dp->force_audio)
+                       return 0;
+
+               intel_dp->force_audio = i;
+
+               if (i == 0)
+                       has_audio = psb_intel_dp_detect_audio(connector);
+               else
+                       has_audio = i > 0;
+
+               if (has_audio == intel_dp->has_audio)
+                       return 0;
+
+               intel_dp->has_audio = has_audio;
+               goto done;
+       }
+
+       if (property == dev_priv->broadcast_rgb_property) {
+               if (val == !!intel_dp->color_range)
+                       return 0;
+
+               intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0;
+               goto done;
+       }
+
+       return -EINVAL;
+
+done:
+       if (output->enc.crtc) {
+               struct drm_crtc *crtc = output->enc.crtc;
+               drm_crtc_helper_set_mode(crtc, &crtc->mode,
+                                        crtc->x, crtc->y,
+                                        crtc->fb);
+       }
+
+       return 0;
+}
+
+static void
+psb_intel_dp_destroy (struct drm_connector *connector)
+{
+       struct psb_intel_output *output = to_psb_intel_output(connector);
+       struct psb_intel_dp *intel_dp = output->dev_priv;
+
+       i2c_del_adapter(&intel_dp->adapter);
+       drm_sysfs_connector_remove(connector);
+       drm_connector_cleanup(connector);
+       kfree(connector);
+}
+
+static void psb_intel_dp_encoder_destroy(struct drm_encoder *encoder)
+{
+       drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_helper_funcs psb_intel_dp_helper_funcs = {
+       .dpms = psb_intel_dp_dpms,
+       .mode_fixup = psb_intel_dp_mode_fixup,
+       .prepare = psb_intel_dp_prepare,
+       .mode_set = psb_intel_dp_mode_set,
+       .commit = psb_intel_dp_commit,
+};
+
+static const struct drm_connector_funcs psb_intel_dp_connector_funcs = {
+       .dpms = drm_helper_connector_dpms,
+       .detect = psb_intel_dp_detect,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .set_property = psb_intel_dp_set_property,
+       .destroy = psb_intel_dp_destroy,
+};
+
+static const struct drm_connector_helper_funcs psb_intel_dp_connector_helper_funcs = {
+       .get_modes = psb_intel_dp_get_modes,
+       .mode_valid = psb_intel_dp_mode_valid,
+       .best_encoder = psb_intel_best_encoder,
+};
+
+static const struct drm_encoder_funcs psb_intel_dp_enc_funcs = {
+       .destroy = psb_intel_dp_encoder_destroy,
+};
+
+
+static void
+psb_intel_dp_add_properties(struct psb_intel_output *output, struct drm_connector *connector)
+{
+       psb_intel_attach_force_audio_property(connector);
+       psb_intel_attach_broadcast_rgb_property(connector);
+}
+
+void
+psb_intel_dp_init(struct drm_device *dev, struct psb_intel_mode_device *mode_dev, int output_reg)
+{
+       struct drm_connector *connector;
+       struct drm_encoder *encoder;
+       struct psb_intel_output *psb_intel_output;
+       struct psb_intel_dp *intel_dp;
+       const char *name = NULL;
+       int type;
+
+       psb_intel_output = kzalloc(sizeof(struct psb_intel_output) +
+                              sizeof(struct psb_intel_dp), GFP_KERNEL);
+       if (!psb_intel_output)
+               return;
+
+       intel_dp = (struct psb_intel_dp *)(psb_intel_output + 1);
+       psb_intel_output->mode_dev = mode_dev;
+       connector = &psb_intel_output->base;
+       encoder = &psb_intel_output->enc;
+       psb_intel_output->dev_priv=intel_dp;
+       intel_dp->output = psb_intel_output;
+
+       intel_dp->output_reg = output_reg;
+       
+       type = DRM_MODE_CONNECTOR_DisplayPort;
+       psb_intel_output->type = INTEL_OUTPUT_DISPLAYPORT;
+
+       drm_connector_init(dev, connector, &psb_intel_dp_connector_funcs, type);
+       drm_connector_helper_add(connector, &psb_intel_dp_connector_helper_funcs);
+
+       connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+       connector->interlace_allowed = 0;
+       connector->doublescan_allowed = 0;
+
+       drm_encoder_init(dev, encoder, &psb_intel_dp_enc_funcs,
+                        DRM_MODE_ENCODER_TMDS);
+       drm_encoder_helper_add(encoder, &psb_intel_dp_helper_funcs);
+
+       drm_mode_connector_attach_encoder(&psb_intel_output->base,
+                                         &psb_intel_output->enc);
+
+       drm_sysfs_connector_add(connector);
+
+       /* Set up the DDC bus. */
+       switch (output_reg) {
+               case DP_B:
+                       name = "DPDDC-B";
+                       psb_intel_output->ddi_select = (DP_MASK | DDI0_SELECT);
+                       break;
+               case DP_C:
+                       name = "DPDDC-C";
+                       psb_intel_output->ddi_select = (DP_MASK | DDI1_SELECT);
+                       break;
+       }
+
+       psb_intel_dp_i2c_init(psb_intel_output, name);
+       psb_intel_dp_add_properties(psb_intel_output, connector);
+
+}
index 7b357b04d4e289d27451f8832c689286d1179e0e..73214e281fabb53e804425fa7844e3b7d263f3af 100644 (file)
  * Display related stuff
  */
 
-/* store information about an Ixxx DVO */
-/* The i830->i865 use multiple DVOs with multiple i2cs */
-/* the i915, i945 have a single sDVO i2c bus - which is different */
-#define MAX_OUTPUTS 6
 /* maximum connectors per crtcs in the mode set */
 #define INTELFB_CONN_LIMIT 4
 
@@ -69,6 +65,8 @@
 #define INTEL_OUTPUT_HDMI 6
 #define INTEL_OUTPUT_MIPI 7
 #define INTEL_OUTPUT_MIPI2 8
+#define INTEL_OUTPUT_DISPLAYPORT 9
+#define INTEL_OUTPUT_EDP 10
 
 #define INTEL_DVO_CHIP_NONE 0
 #define INTEL_DVO_CHIP_LVDS 1
index 8e8c8efb0a89852ec2c9d2b623f43ca25ac2273e..d3091fc72b9e24ce3e8764c760bbb45d52b0d4fa 100644 (file)
@@ -1347,5 +1347,160 @@ No status bits are changed.
 #define LANE_PLL_ENABLE                (0x3 << 20)
 #define LANE_PLL_PIPE(p)       (((p) == 0) ? (1 << 21) : (0 << 21))
 
+#define DP_B                           0x64100
+#define DP_C                           0x64200
+
+#define   DP_PORT_EN                   (1 << 31)
+#define   DP_PIPEB_SELECT              (1 << 30)
+#define   DP_PIPE_MASK                 (1 << 30)
+
+/* Link training mode - select a suitable mode for each stage */
+#define   DP_LINK_TRAIN_PAT_1          (0 << 28)
+#define   DP_LINK_TRAIN_PAT_2          (1 << 28)
+#define   DP_LINK_TRAIN_PAT_IDLE       (2 << 28)
+#define   DP_LINK_TRAIN_OFF            (3 << 28)
+#define   DP_LINK_TRAIN_MASK           (3 << 28)
+#define   DP_LINK_TRAIN_SHIFT          28
+
+/* Signal voltages. These are mostly controlled by the other end */
+#define   DP_VOLTAGE_0_4               (0 << 25)
+#define   DP_VOLTAGE_0_6               (1 << 25)
+#define   DP_VOLTAGE_0_8               (2 << 25)
+#define   DP_VOLTAGE_1_2               (3 << 25)
+#define   DP_VOLTAGE_MASK              (7 << 25)
+#define   DP_VOLTAGE_SHIFT             25
+
+/* Signal pre-emphasis levels, like voltages, the other end tells us what
+ * they want
+ */
+#define   DP_PRE_EMPHASIS_0            (0 << 22)
+#define   DP_PRE_EMPHASIS_3_5          (1 << 22)
+#define   DP_PRE_EMPHASIS_6            (2 << 22)
+#define   DP_PRE_EMPHASIS_9_5          (3 << 22)
+#define   DP_PRE_EMPHASIS_MASK         (7 << 22)
+#define   DP_PRE_EMPHASIS_SHIFT                22
+
+/* How many wires to use. I guess 3 was too hard */
+#define   DP_PORT_WIDTH_1              (0 << 19)
+#define   DP_PORT_WIDTH_2              (1 << 19)
+#define   DP_PORT_WIDTH_4              (3 << 19)
+#define   DP_PORT_WIDTH_MASK           (7 << 19)
+
+/* Mystic DPCD version 1.1 special mode */
+#define   DP_ENHANCED_FRAMING          (1 << 18)
+
+/** locked once port is enabled */
+#define   DP_PORT_REVERSAL             (1 << 15)
+
+/** sends the clock on lane 15 of the PEG for debug */
+#define   DP_CLOCK_OUTPUT_ENABLE       (1 << 13)
+
+#define   DP_SCRAMBLING_DISABLE                (1 << 12)
+#define   DP_SCRAMBLING_DISABLE_IRONLAKE       (1 << 7)
+
+/** limit RGB values to avoid confusing TVs */
+#define   DP_COLOR_RANGE_16_235                (1 << 8)
+
+/** Turn on the audio link */
+#define   DP_AUDIO_OUTPUT_ENABLE       (1 << 6)
+
+/** vs and hs sync polarity */
+#define   DP_SYNC_VS_HIGH              (1 << 4)
+#define   DP_SYNC_HS_HIGH              (1 << 3)
+
+/** A fantasy */
+#define   DP_DETECTED                  (1 << 2)
+
+/** The aux channel provides a way to talk to the
+ * signal sink for DDC etc. Max packet size supported
+ * is 20 bytes in each direction, hence the 5 fixed
+ * data registers
+ */
+#define DPB_AUX_CH_CTL                 0x64110
+#define DPB_AUX_CH_DATA1               0x64114
+#define DPB_AUX_CH_DATA2               0x64118
+#define DPB_AUX_CH_DATA3               0x6411c
+#define DPB_AUX_CH_DATA4               0x64120
+#define DPB_AUX_CH_DATA5               0x64124
+
+#define DPC_AUX_CH_CTL                 0x64210
+#define DPC_AUX_CH_DATA1               0x64214
+#define DPC_AUX_CH_DATA2               0x64218
+#define DPC_AUX_CH_DATA3               0x6421c
+#define DPC_AUX_CH_DATA4               0x64220
+#define DPC_AUX_CH_DATA5               0x64224
+
+#define   DP_AUX_CH_CTL_SEND_BUSY          (1 << 31)
+#define   DP_AUX_CH_CTL_DONE               (1 << 30)
+#define   DP_AUX_CH_CTL_INTERRUPT          (1 << 29)
+#define   DP_AUX_CH_CTL_TIME_OUT_ERROR     (1 << 28)
+#define   DP_AUX_CH_CTL_TIME_OUT_400us     (0 << 26)
+#define   DP_AUX_CH_CTL_TIME_OUT_600us     (1 << 26)
+#define   DP_AUX_CH_CTL_TIME_OUT_800us     (2 << 26)
+#define   DP_AUX_CH_CTL_TIME_OUT_1600us            (3 << 26)
+#define   DP_AUX_CH_CTL_TIME_OUT_MASK      (3 << 26)
+#define   DP_AUX_CH_CTL_RECEIVE_ERROR      (1 << 25)
+#define   DP_AUX_CH_CTL_MESSAGE_SIZE_MASK    (0x1f << 20)
+#define   DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT   20
+#define   DP_AUX_CH_CTL_PRECHARGE_2US_MASK   (0xf << 16)
+#define   DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT  16
+#define   DP_AUX_CH_CTL_AUX_AKSV_SELECT            (1 << 15)
+#define   DP_AUX_CH_CTL_MANCHESTER_TEST            (1 << 14)
+#define   DP_AUX_CH_CTL_SYNC_TEST          (1 << 13)
+#define   DP_AUX_CH_CTL_DEGLITCH_TEST      (1 << 12)
+#define   DP_AUX_CH_CTL_PRECHARGE_TEST     (1 << 11)
+#define   DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK    (0x7ff)
+#define   DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT   0
+
+/*
+ * Computing GMCH M and N values for the Display Port link
+ *
+ * GMCH M/N = dot clock * bytes per pixel / ls_clk * # of lanes
+ *
+ * ls_clk (we assume) is the DP link clock (1.62 or 2.7 GHz)
+ *
+ * The GMCH value is used internally
+ *
+ * bytes_per_pixel is the number of bytes coming out of the plane,
+ * which is after the LUTs, so we want the bytes for our color format.
+ * For our current usage, this is always 3, one byte for R, G and B.
+ */
+
+#define _PIPEA_GMCH_DATA_M                     0x70050
+#define _PIPEB_GMCH_DATA_M                     0x71050
+
+/* Transfer unit size for display port - 1, default is 0x3f (for TU size 64) */
+#define   PIPE_GMCH_DATA_M_TU_SIZE_MASK                (0x3f << 25)
+#define   PIPE_GMCH_DATA_M_TU_SIZE_SHIFT       25
+
+#define   PIPE_GMCH_DATA_M_MASK                        (0xffffff)
+
+#define _PIPEA_GMCH_DATA_N                     0x70054
+#define _PIPEB_GMCH_DATA_N                     0x71054
+#define   PIPE_GMCH_DATA_N_MASK                        (0xffffff)
+
+/*
+ * Computing Link M and N values for the Display Port link
+ *
+ * Link M / N = pixel_clock / ls_clk
+ *
+ * (the DP spec calls pixel_clock the 'strm_clk')
+ *
+ * The Link value is transmitted in the Main Stream
+ * Attributes and VB-ID.
+ */
+
+#define _PIPEA_DP_LINK_M                               0x70060
+#define _PIPEB_DP_LINK_M                               0x71060
+#define   PIPEA_DP_LINK_M_MASK                 (0xffffff)
+
+#define _PIPEA_DP_LINK_N                               0x70064
+#define _PIPEB_DP_LINK_N                               0x71064
+#define   PIPEA_DP_LINK_N_MASK                 (0xffffff)
+
+#define PIPE_GMCH_DATA_M(pipe) _PIPE(pipe, _PIPEA_GMCH_DATA_M, _PIPEB_GMCH_DATA_M)
+#define PIPE_GMCH_DATA_N(pipe) _PIPE(pipe, _PIPEA_GMCH_DATA_N, _PIPEB_GMCH_DATA_N)
+#define PIPE_DP_LINK_M(pipe) _PIPE(pipe, _PIPEA_DP_LINK_M, _PIPEB_DP_LINK_M)
+#define PIPE_DP_LINK_N(pipe) _PIPE(pipe, _PIPEA_DP_LINK_N, _PIPEB_DP_LINK_N)
 
 #endif