1 files changed, 62 insertions, 9 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1aac59e83bff..b4f02826676e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -43,6 +43,7 @@
 #define DP_LINK_CONFIGURATION_SIZE      9
 
 #define IS_eDP(i) ((i)->type == INTEL_OUTPUT_EDP)
+#define IS_PCH_eDP(dp_priv) ((dp_priv)->has_edp)
 
 struct intel_dp_priv {
         uint32_t output_reg;
@@ -56,6 +57,7 @@ struct intel_dp_priv {
         struct intel_encoder *intel_encoder;
         struct i2c_adapter adapter;
         struct i2c_algo_dp_aux_data algo;
+        bool has_edp;
 };
 
 static void
@@ -128,8 +130,9 @@ intel_dp_link_required(struct drm_device *dev,
                        struct intel_encoder *intel_encoder, int pixel_clock)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_dp_priv *dp_priv = intel_encoder->dev_priv;
 
-        if (IS_eDP(intel_encoder))
+        if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv))
                 return (pixel_clock * dev_priv->edp_bpp) / 8;
         else
                 return pixel_clock * 3;
@@ -563,14 +566,14 @@ intel_reduce_ratio(uint32_t *num, uint32_t *den)
 }
 
 static void
-intel_dp_compute_m_n(int bytes_per_pixel,
+intel_dp_compute_m_n(int bpp,
                      int nlanes,
                      int pixel_clock,
                      int link_clock,
                      struct intel_dp_m_n *m_n)
 {
         m_n->tu = 64;
-        m_n->gmch_m = pixel_clock * bytes_per_pixel;
+        m_n->gmch_m = (pixel_clock * bpp) >> 3;
         m_n->gmch_n = link_clock * nlanes;
         intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
         m_n->link_m = pixel_clock;
@@ -578,6 +581,28 @@ intel_dp_compute_m_n(int bytes_per_pixel,
         intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
 }
 
+bool intel_pch_has_edp(struct drm_crtc *crtc)
+{
+        struct drm_device *dev = crtc->dev;
+        struct drm_mode_config *mode_config = &dev->mode_config;
+        struct drm_encoder *encoder;
+
+        list_for_each_entry(encoder, &mode_config->encoder_list, head) {
+                struct intel_encoder *intel_encoder;
+                struct intel_dp_priv *dp_priv;
+
+                if (!encoder || encoder->crtc != crtc)
+                        continue;
+
+                intel_encoder = enc_to_intel_encoder(encoder);
+                dp_priv = intel_encoder->dev_priv;
+
+                if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT)
+                        return dp_priv->has_edp;
+        }
+        return false;
+}
+
 void
 intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
                  struct drm_display_mode *adjusted_mode)
@@ -587,7 +612,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
         struct drm_encoder *encoder;
         struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-        int lane_count = 4;
+        int lane_count = 4, bpp = 24;
         struct intel_dp_m_n m_n;
 
         /*
@@ -605,6 +630,8 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 
                 if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) {
                         lane_count = dp_priv->lane_count;
+                        if (IS_PCH_eDP(dp_priv))
+                                bpp = dev_priv->edp_bpp;
                         break;
                 }
         }
@@ -614,7 +641,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
          * the number of bytes_per_pixel post-LUT, which we always
          * set up for 8-bits of R/G/B, or 3 bytes total.
          */
-        intel_dp_compute_m_n(3, lane_count,
+        intel_dp_compute_m_n(bpp, lane_count,
                              mode->clock, adjusted_mode->clock, &m_n);
 
         if (HAS_PCH_SPLIT(dev)) {
@@ -751,13 +778,13 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
         if (mode != DRM_MODE_DPMS_ON) {
                 if (dp_reg & DP_PORT_EN) {
                         intel_dp_link_down(intel_encoder, dp_priv->DP);
-                        if (IS_eDP(intel_encoder))
+                        if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv))
                                 ironlake_edp_backlight_off(dev);
                 }
         } else {
                 if (!(dp_reg & DP_PORT_EN)) {
                         intel_dp_link_train(intel_encoder, dp_priv->DP, dp_priv->link_configuration);
-                        if (IS_eDP(intel_encoder))
+                        if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv))
                                 ironlake_edp_backlight_on(dev);
                 }
         }
@@ -1291,6 +1318,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
         struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
         struct drm_device *dev = intel_encoder->enc.dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_dp_priv *dp_priv = intel_encoder->dev_priv;
         int ret;
 
         /* We should parse the EDID data and find out if it has an audio sink
@@ -1301,7 +1329,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
                 return ret;
 
         /* if eDP has no EDID, try to use fixed panel mode from VBT */
-        if (IS_eDP(intel_encoder)) {
+        if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) {
                 if (dev_priv->panel_fixed_mode != NULL) {
                         struct drm_display_mode *mode;
                         mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
@@ -1386,6 +1414,26 @@ intel_trans_dp_port_sel (struct drm_crtc *crtc)
         return -1;
 }
 
+/* check the VBT to see whether the eDP is on DP-D port */
+static bool intel_dpd_is_edp(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct child_device_config *p_child;
+        int i;
+
+        if (!dev_priv->child_dev_num)
+                return false;
+
+        for (i = 0; i < dev_priv->child_dev_num; i++) {
+                p_child = dev_priv->child_dev + i;
+
+                if (p_child->dvo_port == PORT_IDPD &&
+                    p_child->device_type == DEVICE_TYPE_eDP)
+                        return true;
+        }
+        return false;
+}
+
 void
 intel_dp_init(struct drm_device *dev, int output_reg)
 {
@@ -1431,6 +1479,11 @@ intel_dp_init(struct drm_device *dev, int output_reg)
         if (IS_eDP(intel_encoder))
                 intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT);
 
+        if (HAS_PCH_SPLIT(dev) && (output_reg == PCH_DP_D)) {
+                if (intel_dpd_is_edp(dev))
+                        dp_priv->has_edp = true;
+        }
+
         intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
         connector->interlace_allowed = true;
         connector->doublescan_allowed = 0;
@@ -1479,7 +1532,7 @@ intel_dp_init(struct drm_device *dev, int output_reg)
         intel_encoder->ddc_bus = &dp_priv->adapter;
         intel_encoder->hot_plug = intel_dp_hot_plug;
 
-        if (output_reg == DP_A) {
+        if (output_reg == DP_A || IS_PCH_eDP(dp_priv)) {
                 /* initialize panel mode from VBT if available for eDP */
                 if (dev_priv->lfp_lvds_vbt_mode) {
                         dev_priv->panel_fixed_mode =