[PATCH 9/9] drm/i915: create the DDI encoder

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

Now intel_ddi_init is just like intel_hdmi_init and intel_dp_init: it
inits the encoder and then calls the proper init_connector functions.
Notice that for non-eDP ports we call both HDMI and DP connector init,
so we have 2 connectors attached to each DDI encoder.

After this change, intel_hdmi_init and intel_dp_init are only called
by Ivy Bridge and earlier, while hardware containing DDI outputs
should call intel_ddi_init.

Also added/removed quite a few "static" keywords due to the fact that
some function pointers were moved from intel_dp.c and intel_hdmi.c to
intel_ddi.c.

DP finally works on Haswell now! \o/

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c  | 143 ++++++++++++++++++++++++++++----------
 drivers/gpu/drm/i915/intel_dp.c   |  45 ++++--------
 drivers/gpu/drm/i915/intel_drv.h  |  20 ++++--
 drivers/gpu/drm/i915/intel_hdmi.c |  36 +++-------
 4 files changed, 144 insertions(+), 100 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 58a529d..67bd6ba 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -64,7 +64,7 @@ static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
 	int type = intel_encoder->type;
 
 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP ||
-	    type == INTEL_OUTPUT_HDMI) {
+	    type == INTEL_OUTPUT_HDMI || type == INTEL_OUTPUT_UNKNOWN) {
 		struct intel_digital_port *intel_dig_port =
 			enc_to_dig_port(encoder);
 		return intel_dig_port->port;
@@ -227,35 +227,6 @@ void hsw_fdi_link_train(struct drm_crtc *crtc)
 	DRM_DEBUG_KMS("FDI train done.\n");
 }
 
-/* For DDI connections, it is possible to support different outputs over the
- * same DDI port, such as HDMI or DP or even VGA via FDI. So we don't know by
- * the time the output is detected what exactly is on the other end of it. This
- * function aims at providing support for this detection and proper output
- * configuration.
- */
-void intel_ddi_init(struct drm_device *dev, enum port port)
-{
-	/* For now, we don't do any proper output detection and assume that we
-	 * handle HDMI only */
-
-	switch(port){
-	case PORT_A:
-		DRM_DEBUG_DRIVER("Found digital output on DDI port A\n");
-		intel_dp_init(dev, DDI_BUF_CTL_A, PORT_A);
-		break;
-	/* Assume that the  ports B, C and D are working in HDMI mode for now */
-	case PORT_B:
-	case PORT_C:
-	case PORT_D:
-		intel_hdmi_init(dev, DDI_BUF_CTL(port), port);
-		break;
-	default:
-		DRM_DEBUG_DRIVER("No handlers defined for port %d, skipping DDI initialization\n",
-				port);
-		break;
-	}
-}
-
 /* WRPLL clock dividers */
 struct wrpll_tmds_clock {
 	u32 clock;
@@ -642,9 +613,9 @@ static const struct wrpll_tmds_clock wrpll_tmds_clock_table[] = {
 	{298000,	2,	21,	19},
 };
 
-void intel_ddi_mode_set(struct drm_encoder *encoder,
-				struct drm_display_mode *mode,
-				struct drm_display_mode *adjusted_mode)
+static void intel_ddi_mode_set(struct drm_encoder *encoder,
+			       struct drm_display_mode *mode,
+			       struct drm_display_mode *adjusted_mode)
 {
 	struct drm_crtc *crtc = encoder->crtc;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@@ -1192,7 +1163,7 @@ void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
 			   TRANS_CLK_SEL_DISABLED);
 }
 
-void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
+static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_crtc *crtc = encoder->crtc;
@@ -1234,7 +1205,7 @@ static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
 	DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
 }
 
-void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
+static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
@@ -1267,7 +1238,7 @@ void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
 	I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
 }
 
-void intel_enable_ddi(struct intel_encoder *intel_encoder)
+static void intel_enable_ddi(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_device *dev = encoder->dev;
@@ -1288,7 +1259,7 @@ void intel_enable_ddi(struct intel_encoder *intel_encoder)
 	}
 }
 
-void intel_disable_ddi(struct intel_encoder *intel_encoder)
+static void intel_disable_ddi(struct intel_encoder *intel_encoder)
 {
 	struct drm_encoder *encoder = &intel_encoder->base;
 	int type = intel_encoder->type;
@@ -1371,3 +1342,101 @@ void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
 
 	udelay(600);
 }
+
+static void intel_ddi_hot_plug(struct intel_encoder *intel_encoder)
+{
+	struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
+	int type = intel_encoder->type;
+
+	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP)
+		intel_dp_check_link_status(intel_dp);
+}
+
+static void intel_ddi_destroy(struct drm_encoder *encoder)
+{
+	/* HDMI has nothing special to destroy, so we can go with this. */
+	intel_dp_encoder_destroy(encoder);
+}
+
+static bool intel_ddi_mode_fixup(struct drm_encoder *encoder,
+				 const struct drm_display_mode *mode,
+				 struct drm_display_mode *adjusted_mode)
+{
+	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
+	int type = intel_encoder->type;
+
+	WARN(type == INTEL_OUTPUT_UNKNOWN, "mode_fixup() on unknown output!\n");
+
+	if (type == INTEL_OUTPUT_HDMI)
+		return intel_hdmi_mode_fixup(encoder, mode, adjusted_mode);
+	else
+		return intel_dp_mode_fixup(encoder, mode, adjusted_mode);
+}
+
+static const struct drm_encoder_funcs intel_ddi_funcs = {
+	.destroy = intel_ddi_destroy,
+};
+
+static const struct drm_encoder_helper_funcs intel_ddi_helper_funcs = {
+	.mode_fixup = intel_ddi_mode_fixup,
+	.mode_set = intel_ddi_mode_set,
+	.disable = intel_encoder_noop,
+};
+
+void intel_ddi_init(struct drm_device *dev, enum port port)
+{
+	struct intel_digital_port *intel_dig_port;
+	struct intel_encoder *intel_encoder;
+	struct drm_encoder *encoder;
+	struct intel_connector *hdmi_connector = NULL;
+	struct intel_connector *dp_connector = NULL;
+
+	intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL);
+	if (!intel_dig_port)
+		return;
+
+	dp_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
+	if (!dp_connector) {
+		kfree(intel_dig_port);
+		return;
+	}
+
+	if (port != PORT_A) {
+		hdmi_connector = kzalloc(sizeof(struct intel_connector),
+					 GFP_KERNEL);
+		if (!hdmi_connector) {
+			kfree(dp_connector);
+			kfree(intel_dig_port);
+			return;
+		}
+	}
+
+	intel_encoder = &intel_dig_port->base;
+	encoder = &intel_encoder->base;
+
+	drm_encoder_init(dev, encoder, &intel_ddi_funcs,
+			 DRM_MODE_ENCODER_TMDS);
+	drm_encoder_helper_add(encoder, &intel_ddi_helper_funcs);
+
+	intel_encoder->enable = intel_enable_ddi;
+	intel_encoder->pre_enable = intel_ddi_pre_enable;
+	intel_encoder->disable = intel_disable_ddi;
+	intel_encoder->post_disable = intel_ddi_post_disable;
+	intel_encoder->get_hw_state = intel_ddi_get_hw_state;
+
+	intel_dig_port->port = port;
+	if (hdmi_connector)
+		intel_dig_port->hdmi.sdvox_reg = DDI_BUF_CTL(port);
+	else
+		intel_dig_port->hdmi.sdvox_reg = 0;
+	intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
+
+	intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
+	intel_encoder->crtc_mask =  (1 << 0) | (1 << 1) | (1 << 2);
+	intel_encoder->cloneable = false;
+	intel_encoder->hot_plug = intel_ddi_hot_plug;
+
+	if (hdmi_connector)
+		intel_hdmi_init_connector(intel_dig_port, hdmi_connector);
+	intel_dp_init_connector(intel_dig_port, dp_connector);
+}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 66bff2d..ff5c332 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -685,7 +685,7 @@ intel_dp_i2c_init(struct intel_dp *intel_dp,
 	return ret;
 }
 
-static bool
+bool
 intel_dp_mode_fixup(struct drm_encoder *encoder,
 		    const struct drm_display_mode *mode,
 		    struct drm_display_mode *adjusted_mode)
@@ -2109,7 +2109,7 @@ intel_dp_handle_test_request(struct intel_dp *intel_dp)
  *  4. Check link status on receipt of hot-plug interrupt
  */
 
-static void
+void
 intel_dp_check_link_status(struct intel_dp *intel_dp)
 {
 	struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
@@ -2468,7 +2468,7 @@ intel_dp_destroy(struct drm_connector *connector)
 	kfree(connector);
 }
 
-static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
+void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 {
 	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
@@ -2488,12 +2488,6 @@ static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
 	.disable = intel_encoder_noop,
 };
 
-static const struct drm_encoder_helper_funcs intel_dp_helper_funcs_hsw = {
-	.mode_fixup = intel_dp_mode_fixup,
-	.mode_set = intel_ddi_mode_set,
-	.disable = intel_encoder_noop,
-};
-
 static const struct drm_connector_funcs intel_dp_connector_funcs = {
 	.dpms = intel_connector_dpms,
 	.detect = intel_dp_detect,
@@ -2689,7 +2683,7 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
 		      I915_READ(PCH_PP_DIVISOR));
 }
 
-static void
+void
 intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 			struct intel_connector *intel_connector)
 {
@@ -2722,8 +2716,11 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 		type = DRM_MODE_CONNECTOR_eDP;
 		intel_encoder->type = INTEL_OUTPUT_EDP;
 	} else {
+		/* The intel_encoder->type value may be INTEL_OUTPUT_UNKNOWN for
+		 * DDI or INTEL_OUTPUT_DISPLAYPORT for the older gens, so don't
+		 * rewrite it.
+		 */
 		type = DRM_MODE_CONNECTOR_DisplayPort;
-		intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
 	}
 
 	drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
@@ -2868,31 +2865,19 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 
 	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
 			 DRM_MODE_ENCODER_TMDS);
+	drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs);
 
-	if (IS_HASWELL(dev)) {
-		drm_encoder_helper_add(&intel_encoder->base,
-				       &intel_dp_helper_funcs_hsw);
-
-		intel_encoder->enable = intel_enable_ddi;
-		intel_encoder->pre_enable = intel_ddi_pre_enable;
-		intel_encoder->disable = intel_disable_ddi;
-		intel_encoder->post_disable = intel_ddi_post_disable;
-		intel_encoder->get_hw_state = intel_ddi_get_hw_state;
-	} else {
-		drm_encoder_helper_add(&intel_encoder->base,
-				       &intel_dp_helper_funcs);
-
-		intel_encoder->enable = intel_enable_dp;
-		intel_encoder->pre_enable = intel_pre_enable_dp;
-		intel_encoder->disable = intel_disable_dp;
-		intel_encoder->post_disable = intel_post_disable_dp;
-		intel_encoder->get_hw_state = intel_dp_get_hw_state;
-	}
+	intel_encoder->enable = intel_enable_dp;
+	intel_encoder->pre_enable = intel_pre_enable_dp;
+	intel_encoder->disable = intel_disable_dp;
+	intel_encoder->post_disable = intel_post_disable_dp;
+	intel_encoder->get_hw_state = intel_dp_get_hw_state;
 
 	intel_dig_port->port = port;
 	intel_dig_port->dp.output_reg = output_reg;
 	intel_dig_port->hdmi.sdvox_reg = 0;
 
+	intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
 	intel_encoder->cloneable = false;
 	intel_encoder->hot_plug = intel_dp_hot_plug;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 0a527729..4561f0c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -94,6 +94,7 @@
 #define INTEL_OUTPUT_HDMI 6
 #define INTEL_OUTPUT_DISPLAYPORT 7
 #define INTEL_OUTPUT_EDP 8
+#define INTEL_OUTPUT_UNKNOWN 9
 
 #define INTEL_DVO_CHIP_NONE 0
 #define INTEL_DVO_CHIP_LVDS 1
@@ -421,7 +422,12 @@ extern void intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 extern void intel_crt_init(struct drm_device *dev);
 extern void intel_hdmi_init(struct drm_device *dev,
 			    int sdvox_reg, enum port port);
+extern void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
+				      struct intel_connector *intel_connector);
 extern struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder);
+extern bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
+				  const struct drm_display_mode *mode,
+				  struct drm_display_mode *adjusted_mode);
 extern void intel_dip_infoframe_csum(struct dip_infoframe *avi_if);
 extern bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg,
 			    bool is_sdvob);
@@ -434,6 +440,8 @@ extern void intel_mark_fb_idle(struct drm_i915_gem_object *obj);
 extern bool intel_lvds_init(struct drm_device *dev);
 extern void intel_dp_init(struct drm_device *dev, int output_reg,
 			  enum port port);
+extern void intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
+				    struct intel_connector *intel_connector);
 void
 intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
 		 struct drm_display_mode *adjusted_mode);
@@ -441,6 +449,11 @@ extern void intel_dp_init_link_config(struct intel_dp *intel_dp);
 extern void intel_dp_start_link_train(struct intel_dp *intel_dp);
 extern void intel_dp_complete_link_train(struct intel_dp *intel_dp);
 extern void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode);
+extern void intel_dp_encoder_destroy(struct drm_encoder *encoder);
+extern void intel_dp_check_link_status(struct intel_dp *intel_dp);
+extern bool intel_dp_mode_fixup(struct drm_encoder *encoder,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode);
 extern bool intel_dpd_is_edp(struct drm_device *dev);
 extern void ironlake_edp_backlight_on(struct intel_dp *intel_dp);
 extern void ironlake_edp_backlight_off(struct intel_dp *intel_dp);
@@ -631,13 +644,8 @@ extern void intel_disable_gt_powersave(struct drm_device *dev);
 extern void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv);
 extern void ironlake_teardown_rc6(struct drm_device *dev);
 
-extern void intel_enable_ddi(struct intel_encoder *intel_encoder);
-extern void intel_disable_ddi(struct intel_encoder *intel_encoder);
 extern bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
 				   enum pipe *pipe);
-extern void intel_ddi_mode_set(struct drm_encoder *encoder,
-				struct drm_display_mode *mode,
-				struct drm_display_mode *adjusted_mode);
 extern int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv);
 extern void intel_ddi_pll_init(struct drm_device *dev);
 extern void intel_ddi_enable_pipe_func(struct drm_crtc *crtc);
@@ -647,8 +655,6 @@ extern void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc);
 extern void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc);
 extern void intel_ddi_setup_hw_pll_state(struct drm_device *dev);
 extern bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock);
-extern void intel_ddi_pre_enable(struct intel_encoder *intel_encoder);
-extern void intel_ddi_post_disable(struct intel_encoder *intel_encoder);
 extern void intel_ddi_put_crtc_pll(struct drm_crtc *crtc);
 extern void intel_ddi_set_pipe_settings(struct drm_crtc *crtc);
 extern void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 79d15b3..1dcfd5b 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -760,9 +760,9 @@ static int intel_hdmi_mode_valid(struct drm_connector *connector,
 	return MODE_OK;
 }
 
-static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
-				  const struct drm_display_mode *mode,
-				  struct drm_display_mode *adjusted_mode)
+bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
+			   const struct drm_display_mode *mode,
+			   struct drm_display_mode *adjusted_mode)
 {
 	return true;
 }
@@ -926,12 +926,6 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 	kfree(connector);
 }
 
-static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs_hsw = {
-	.mode_fixup = intel_hdmi_mode_fixup,
-	.mode_set = intel_ddi_mode_set,
-	.disable = intel_encoder_noop,
-};
-
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 	.mode_fixup = intel_hdmi_mode_fixup,
 	.mode_set = intel_hdmi_mode_set,
@@ -963,8 +957,8 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
 	intel_attach_broadcast_rgb_property(connector);
 }
 
-static void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
-				      struct intel_connector *intel_connector)
+void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
+			       struct intel_connector *intel_connector)
 {
 	struct drm_connector *connector = &intel_connector->base;
 	struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
@@ -1059,21 +1053,11 @@ void intel_hdmi_init(struct drm_device *dev, int sdvox_reg, enum port port)
 
 	drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 			 DRM_MODE_ENCODER_TMDS);
-	if (IS_HASWELL(dev)) {
-		intel_encoder->pre_enable = intel_ddi_pre_enable;
-		intel_encoder->enable = intel_enable_ddi;
-		intel_encoder->disable = intel_disable_ddi;
-		intel_encoder->post_disable = intel_ddi_post_disable;
-		intel_encoder->get_hw_state = intel_ddi_get_hw_state;
-		drm_encoder_helper_add(&intel_encoder->base,
-				       &intel_hdmi_helper_funcs_hsw);
-	} else {
-		intel_encoder->enable = intel_enable_hdmi;
-		intel_encoder->disable = intel_disable_hdmi;
-		intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
-		drm_encoder_helper_add(&intel_encoder->base,
-				       &intel_hdmi_helper_funcs);
-	}
+	drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
+
+	intel_encoder->enable = intel_enable_hdmi;
+	intel_encoder->disable = intel_disable_hdmi;
+	intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
 
 	intel_encoder->type = INTEL_OUTPUT_HDMI;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
-- 
1.7.11.4