[PATCH 06/13] drm/i915: Add plumbing for digital connector state.

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Some atomic properties are common between the various kinds of
connectors, for example a lot of them use panel fitting mode.
It makes sense to put a lot of it in a common place, so each
connector can use it while they're being converted.

Implement the properties required for the connectors:
- scaling mode property
- force audio property
- broadcast rgb
- aspect ratio

While at it, make clear that intel_digital_connector_atomic_get_property
is a hack that has to be removed when all connector properties
are converted to atomic.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_atomic.c  | 175 +++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_display.c |  14 ++-
 drivers/gpu/drm/i915/intel_dp.c      |   2 +-
 drivers/gpu/drm/i915/intel_drv.h     |  32 ++++++-
 drivers/gpu/drm/i915/intel_dsi.c     |   2 +-
 drivers/gpu/drm/i915/intel_dvo.c     |   2 +-
 drivers/gpu/drm/i915/intel_lvds.c    |   2 +-
 drivers/gpu/drm/i915/intel_panel.c   |   4 +-
 8 files changed, 218 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 50fb1f76cc5f..27d5c4a16bcb 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -36,7 +36,7 @@
 #include "intel_drv.h"
 
 /**
- * intel_connector_atomic_get_property - fetch connector property value
+ * intel_connector_atomic_get_property - fetch legacy connector property value
  * @connector: connector to fetch property for
  * @state: state containing the property value
  * @property: property to look up
@@ -45,12 +45,14 @@
  * The DRM core does not store shadow copies of properties for
  * atomic-capable drivers.  This entrypoint is used to fetch
  * the current value of a driver-specific connector property.
+ *
+ * This is a intermediary solution until all connectors are
+ * converted to support full atomic properties.
  */
-int
-intel_connector_atomic_get_property(struct drm_connector *connector,
-				    const struct drm_connector_state *state,
-				    struct drm_property *property,
-				    uint64_t *val)
+int intel_connector_atomic_get_property(struct drm_connector *connector,
+					const struct drm_connector_state *state,
+					struct drm_property *property,
+					uint64_t *val)
 {
 	int i;
 
@@ -73,7 +75,166 @@ intel_connector_atomic_get_property(struct drm_connector *connector,
 	return -EINVAL;
 }
 
-/*
+/**
+ * intel_digital_connector_atomic_get_property - hook for connector->atomic_get_property.
+ * @connector: Connector to get the property for.
+ * @state: Connector state to retrieve the property from.
+ * @property: Property to retrieve.
+ * @val: Return value for the property.
+ *
+ * Returns the atomic property value for a digital connector.
+ */
+int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
+						const struct drm_connector_state *state,
+						struct drm_property *property,
+						uint64_t *val)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_digital_connector_state *intel_conn_state =
+		to_intel_digital_connector_state(state);
+
+	if (property == dev->mode_config.scaling_mode_property)
+		*val = intel_conn_state->panel.fitting_mode;
+	else if (property == dev_priv->force_audio_property)
+		*val = intel_conn_state->force_audio;
+	else if (property == dev_priv->broadcast_rgb_property)
+		*val = intel_conn_state->broadcast_rgb;
+	else if (property == dev->mode_config.aspect_ratio_property) {
+		switch (intel_conn_state->aspect_ratio) {
+		case HDMI_PICTURE_ASPECT_NONE: *val = DRM_MODE_PICTURE_ASPECT_NONE; break;
+		case HDMI_PICTURE_ASPECT_4_3: *val = DRM_MODE_PICTURE_ASPECT_4_3; break;
+		case HDMI_PICTURE_ASPECT_16_9: *val = DRM_MODE_PICTURE_ASPECT_16_9; break;
+		default:
+			MISSING_CASE(intel_conn_state->aspect_ratio);
+			return -EINVAL;
+		}
+	} else {
+		DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * intel_digital_connector_atomic_set_property - hook for connector->atomic_set_property.
+ * @connector: Connector to set the property for.
+ * @state: Connector state to set the property on.
+ * @property: Property to set.
+ * @val: New value for the property.
+ *
+ * Sets the atomic property value for a digital connector.
+ */
+int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
+						struct drm_connector_state *state,
+						struct drm_property *property,
+						uint64_t val)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+	struct drm_device *dev = connector->dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_digital_connector_state *intel_conn_state =
+		to_intel_digital_connector_state(state);
+
+	if (property == dev->mode_config.scaling_mode_property) {
+		if (BIT(val) & ~intel_connector->panel.allowed_fitting_mode_mask) {
+			DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] Panel fitting mode %llu not allowed.\n",
+					 connector->base.id, connector->name, val);
+			return -EINVAL;
+		}
+
+		intel_conn_state->panel.fitting_mode = val;
+		return 0;
+	}
+
+	if (property == dev_priv->force_audio_property) {
+		intel_conn_state->force_audio = val;
+		return 0;
+	}
+
+	if (property == dev_priv->broadcast_rgb_property) {
+		intel_conn_state->broadcast_rgb = val;
+		return 0;
+	}
+
+	if (property == dev->mode_config.aspect_ratio_property) {
+		switch (val) {
+		case DRM_MODE_PICTURE_ASPECT_NONE:
+			intel_conn_state->aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
+			break;
+		case DRM_MODE_PICTURE_ASPECT_4_3:
+			intel_conn_state->aspect_ratio = HDMI_PICTURE_ASPECT_4_3;
+			break;
+		case DRM_MODE_PICTURE_ASPECT_16_9:
+			intel_conn_state->aspect_ratio = HDMI_PICTURE_ASPECT_16_9;
+			break;
+		default:
+			DRM_DEBUG_ATOMIC("Unknown picture aspect ratio %lli\n", val);
+			return -EINVAL;
+		}
+		return 0;
+	}
+
+	DRM_DEBUG_ATOMIC("Unknown property %s\n", property->name);
+	return -EINVAL;
+}
+
+int intel_digital_connector_atomic_check(struct drm_connector *conn,
+					 struct drm_connector_state *new_state)
+{
+	struct intel_digital_connector_state *new_conn_state =
+		to_intel_digital_connector_state(new_state);
+	struct drm_connector_state *old_state =
+		drm_atomic_get_old_connector_state(new_state->state, conn);
+	struct intel_digital_connector_state *old_conn_state =
+		to_intel_digital_connector_state(old_state);
+	struct drm_crtc_state *crtc_state;
+
+	if (!new_state->crtc)
+		return 0;
+
+	crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
+
+	/* Invisible to fastset since it's a pure connector property */
+	if (new_conn_state->panel.fitting_mode != old_conn_state->panel.fitting_mode)
+		crtc_state->connectors_changed = true;
+
+	/*
+	 * These properties are handled by fastset, and might not end
+	 * up in a modeset.
+	 */
+	if (new_conn_state->force_audio != old_conn_state->force_audio ||
+	    new_conn_state->broadcast_rgb != old_conn_state->broadcast_rgb ||
+	    new_conn_state->aspect_ratio != old_conn_state->aspect_ratio)
+		crtc_state->mode_changed = true;
+
+	return 0;
+}
+
+/**
+ * intel_digital_connector_duplicate_state - duplicate connector state
+ * @connector: digital connector
+ *
+ * Allocates and returns a copy of the connector state (both common and
+ * digital connector specific) for the specified connector.
+ *
+ * Returns: The newly allocated connector state, or NULL on failure.
+ */
+struct drm_connector_state *
+intel_digital_connector_duplicate_state(struct drm_connector *connector)
+{
+	struct intel_digital_connector_state *state;
+
+	state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	__drm_atomic_helper_connector_duplicate_state(connector, &state->base);
+	return &state->base;
+}
+
+/**
  * intel_crtc_duplicate_state - duplicate crtc state
  * @crtc: drm crtc
  *
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 70e2d041b970..ac26f680eec1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5959,11 +5959,21 @@ static void intel_connector_verify_state(struct intel_connector *connector)
 
 int intel_connector_init(struct intel_connector *connector)
 {
-	drm_atomic_helper_connector_reset(&connector->base);
+	struct intel_digital_connector_state *conn_state;
 
-	if (!connector->base.state)
+	/*
+	 * Allocate enough memory to hold intel_digital_connector_state,
+	 * This might be a few bytes too many, but for connectors that don't
+	 * need it we'll free the state and allocate a smaller one on the first
+	 * succesful commit anyway.
+	 */
+	conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
+	if (!conn_state)
 		return -ENOMEM;
 
+	__drm_atomic_helper_connector_reset(&connector->base,
+					    &conn_state->base);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index fc7f4f9eae1e..312a39038dad 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5905,7 +5905,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 			      pipe_name(pipe));
 	}
 
-	intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
+	intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode, 0);
 	intel_connector->panel.backlight.power = intel_edp_backlight_power;
 	intel_panel_setup_backlight(connector, pipe);
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 43ea74882f9a..a686d112dea2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -262,6 +262,7 @@ struct intel_panel {
 	struct drm_display_mode *fixed_mode;
 	struct drm_display_mode *downclock_mode;
 	int fitting_mode;
+	unsigned allowed_fitting_mode_mask;
 
 	/* backlight */
 	struct {
@@ -323,6 +324,20 @@ struct intel_connector {
 	struct intel_dp *mst_port;
 };
 
+struct intel_digital_connector_state {
+	struct drm_connector_state base;
+
+	struct {
+		int fitting_mode;
+	} panel;
+
+	enum hdmi_force_audio force_audio;
+	int broadcast_rgb;
+	enum hdmi_picture_aspect aspect_ratio;
+};
+
+#define to_intel_digital_connector_state(x) container_of(x, struct intel_digital_connector_state, base)
+
 struct dpll {
 	/* given values */
 	int n;
@@ -1665,7 +1680,8 @@ void intel_overlay_reset(struct drm_i915_private *dev_priv);
 /* intel_panel.c */
 int intel_panel_init(struct intel_panel *panel,
 		     struct drm_display_mode *fixed_mode,
-		     struct drm_display_mode *downclock_mode);
+		     struct drm_display_mode *downclock_mode,
+		     unsigned allowed_fitting_mode_mask);
 void intel_panel_fini(struct intel_panel *panel);
 void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
 			    struct drm_display_mode *adjusted_mode);
@@ -1876,6 +1892,20 @@ int intel_connector_atomic_get_property(struct drm_connector *connector,
 					const struct drm_connector_state *state,
 					struct drm_property *property,
 					uint64_t *val);
+
+int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
+						const struct drm_connector_state *state,
+						struct drm_property *property,
+						uint64_t *val);
+int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
+						struct drm_connector_state *state,
+						struct drm_property *property,
+						uint64_t val);
+int intel_digital_connector_atomic_check(struct drm_connector *conn,
+					 struct drm_connector_state *new_state);
+struct drm_connector_state *
+intel_digital_connector_duplicate_state(struct drm_connector *connector);
+
 struct drm_crtc_state *intel_crtc_duplicate_state(struct drm_crtc *crtc);
 void intel_crtc_destroy_state(struct drm_crtc *crtc,
 			       struct drm_crtc_state *state);
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 3ffe8b1f1d48..e787142025ac 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -1853,7 +1853,7 @@ void intel_dsi_init(struct drm_i915_private *dev_priv)
 	connector->display_info.width_mm = fixed_mode->width_mm;
 	connector->display_info.height_mm = fixed_mode->height_mm;
 
-	intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
+	intel_panel_init(&intel_connector->panel, fixed_mode, NULL, 0);
 	intel_panel_setup_backlight(connector, INVALID_PIPE);
 
 	intel_dsi_add_properties(intel_connector);
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
index c1544a53095d..0b723157c38b 100644
--- a/drivers/gpu/drm/i915/intel_dvo.c
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -554,7 +554,7 @@ void intel_dvo_init(struct drm_i915_private *dev_priv)
 			 */
 			intel_panel_init(&intel_connector->panel,
 					 intel_dvo_get_current_mode(connector),
-					 NULL);
+					 NULL, 0);
 			intel_dvo->panel_wants_dither = true;
 		}
 
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 8b942ef2b3ec..919d84290774 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -1181,7 +1181,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 out:
 	mutex_unlock(&dev->mode_config.mutex);
 
-	intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
+	intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode, 0);
 	intel_panel_setup_backlight(connector, INVALID_PIPE);
 
 	lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index cb50c527401f..c6ce15550e5e 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1801,12 +1801,14 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
 
 int intel_panel_init(struct intel_panel *panel,
 		     struct drm_display_mode *fixed_mode,
-		     struct drm_display_mode *downclock_mode)
+		     struct drm_display_mode *downclock_mode,
+		     unsigned allowed_fitting_mode_mask)
 {
 	intel_panel_init_backlight_funcs(panel);
 
 	panel->fixed_mode = fixed_mode;
 	panel->downclock_mode = downclock_mode;
+	panel->allowed_fitting_mode_mask = allowed_fitting_mode_mask;
 
 	return 0;
 }
-- 
2.7.4

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