drm/msm: Add the eDP connector in msm drm driver (V2)

Modified the hard-coded hdmi connector/encoder implementations in msm drm
driver to support both edp and hdmi.

V1: Initial change

V2: Address Thierry's change
Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_encoder.c

 /*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
@@ -123,11 +124,13 @@ static void mdp5_encoder_mode_set(struct drm_encoder *encoder,
 {
 	struct mdp5_encoder *mdp5_encoder = to_mdp5_encoder(encoder);
 	struct mdp5_kms *mdp5_kms = get_kms(encoder);
+	struct drm_device *dev = encoder->dev;
+	struct drm_connector *connector;
 	int intf = mdp5_encoder->intf;
 	uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
 	uint32_t display_v_start, display_v_end;
 	uint32_t hsync_start_x, hsync_end_x;
-	uint32_t format;
+	uint32_t format = 0x2100;
 	unsigned long flags;
 
 	mode = adjusted_mode;
@@ -149,7 +152,28 @@ static void mdp5_encoder_mode_set(struct drm_encoder *encoder,
 	/* probably need to get DATA_EN polarity from panel.. */
 
 	dtv_hsync_skew = 0;  /* get this from panel? */
-	format = 0x213f;     /* get this from panel? */
+
+	/* Get color format from panel, default is 8bpc */
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if (connector->encoder == encoder) {
+			switch (connector->display_info.bpc) {
+			case 4:
+				format |= 0;
+				break;
+			case 5:
+				format |= 0x15;
+				break;
+			case 6:
+				format |= 0x2A;
+				break;
+			case 8:
+			default:
+				format |= 0x3F;
+				break;
+			}
+			break;
+		}
+	}
 
 	hsync_start_x = (mode->htotal - mode->hsync_start);
 	hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
@@ -159,6 +183,16 @@ static void mdp5_encoder_mode_set(struct drm_encoder *encoder,
 	display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dtv_hsync_skew;
 	display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dtv_hsync_skew - 1;
 
+	/*
+	 * For edp only:
+	 * DISPLAY_V_START = (VBP * HCYCLE) + HBP
+	 * DISPLAY_V_END = (VBP + VACTIVE) * HCYCLE - 1 - HFP
+	 */
+	if (mdp5_encoder->intf_id == INTF_eDP) {
+		display_v_start += mode->htotal - mode->hsync_start;
+		display_v_end -= mode->hsync_start - mode->hdisplay;
+	}
+
 	spin_lock_irqsave(&mdp5_encoder->intf_lock, flags);
 
 	mdp5_write(mdp5_kms, REG_MDP5_INTF_HSYNC_CTL(intf),

drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c

@@ -222,19 +222,18 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
 		}
 	}
 
-	/* Construct encoder for HDMI: */
-	encoder = mdp5_encoder_init(dev, 3, INTF_HDMI);
-	if (IS_ERR(encoder)) {
-		dev_err(dev->dev, "failed to construct encoder\n");
-		ret = PTR_ERR(encoder);
-		goto fail;
-	}
+	if (priv->hdmi) {
+		/* Construct encoder for HDMI: */
+		encoder = mdp5_encoder_init(dev, 3, INTF_HDMI);
+		if (IS_ERR(encoder)) {
+			dev_err(dev->dev, "failed to construct encoder\n");
+			ret = PTR_ERR(encoder);
+			goto fail;
+		}
 
-	encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;;
-	priv->encoders[priv->num_encoders++] = encoder;
+		encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;;
+		priv->encoders[priv->num_encoders++] = encoder;
 
-	/* Construct bridge/connector for HDMI: */
-	if (priv->hdmi) {
 		ret = hdmi_modeset_init(priv->hdmi, dev, encoder);
 		if (ret) {
 			dev_err(dev->dev, "failed to initialize HDMI: %d\n", ret);
@@ -242,6 +241,27 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
 		}
 	}
 
+	if (priv->edp) {
+		/* Construct encoder for eDP: */
+		encoder = mdp5_encoder_init(dev, 0, INTF_eDP);
+		if (IS_ERR(encoder)) {
+			dev_err(dev->dev, "failed to construct eDP encoder\n");
+			ret = PTR_ERR(encoder);
+			goto fail;
+		}
+
+		encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
+		priv->encoders[priv->num_encoders++] = encoder;
+
+		/* Construct bridge/connector for eDP: */
+		ret = msm_edp_modeset_init(priv->edp, dev, encoder);
+		if (ret) {
+			dev_err(dev->dev, "failed to initialize eDP: %d\n",
+									ret);
+			goto fail;
+		}
+	}
+
 	return 0;
 
 fail:

drivers/gpu/drm/msm/msm_drv.c

@@ -1023,6 +1023,7 @@ static struct platform_driver msm_platform_driver = {
 static int __init msm_drm_register(void)
 {
 	DBG("init");
+	msm_edp_register();
 	hdmi_register();
 	adreno_register();
 	return platform_driver_register(&msm_platform_driver);
@@ -1034,6 +1035,7 @@ static void __exit msm_drm_unregister(void)
 	platform_driver_unregister(&msm_platform_driver);
 	hdmi_unregister();
 	adreno_unregister();
+	msm_edp_unregister();
 }
 
 module_init(msm_drm_register);

drivers/gpu/drm/msm/msm_drv.h

@@ -230,6 +230,12 @@ int hdmi_modeset_init(struct hdmi *hdmi, struct drm_device *dev,
 void __init hdmi_register(void);
 void __exit hdmi_unregister(void);
 
+struct msm_edp;
+void __init msm_edp_register(void);
+void __exit msm_edp_unregister(void);
+int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev,
+		struct drm_encoder *encoder);
+
 #ifdef CONFIG_DEBUG_FS
 void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
 void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);