--- /dev/null
+/*
+ * 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);
+
+}
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff