[Intel-gfx] [PATCH 3/7] drm/i915: select TV format according to connector type

[yakui.zhao at intel.com]

From: Ma Ling <ling.ma at intel.com>

For integrated TV there are 3 connector types: S-VIDEO, Composite and
Component(YprPb). Those tv formats whose component flag is true should  
be assigned to Component connector, others are for S-VIDEO and Composite.
The patch intends to find appropriate tv format for each connector.
In such case it will return the correct modeline to user space. Otherwise 
it will return the incorrect modeline when S-video/composite is connected.

Signed-off-by: Ma Ling <ling.ma at intel.com>
reviewed-by: Zhao Yakui <yakui.zhao at intel.com>
---
 drivers/gpu/drm/i915/intel_tv.c |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Index: linux-2.6/drivers/gpu/drm/i915/intel_tv.c
===================================================================
--- linux-2.6.orig/drivers/gpu/drm/i915/intel_tv.c	2009-08-21 16:31:47.000000000 +0800
+++ linux-2.6/drivers/gpu/drm/i915/intel_tv.c	2009-08-21 16:31:53.000000000 +0800
@@ -1437,6 +1437,35 @@
 	return type;
 }
 
+/*
+ * Here we set accurate tv format according to connector type
+ * i.e Component TV should not be assigned by NTSC or PAL
+ */
+static void intel_tv_find_better_format(struct drm_connector *connector)
+{
+	struct intel_output *intel_output = to_intel_output(connector);
+	struct intel_tv_priv *tv_priv = intel_output->dev_priv;
+	const struct tv_mode *tv_mode = intel_tv_mode_find(intel_output);
+	int i;
+
+	if ((tv_priv->type == DRM_MODE_CONNECTOR_Component) ==
+		tv_mode->component_only)
+		return;
+
+
+	for (i = 0; i < sizeof(tv_modes) / sizeof(*tv_modes); i++) {
+		tv_mode = tv_modes + i;
+
+		if ((tv_priv->type == DRM_MODE_CONNECTOR_Component) ==
+			tv_mode->component_only)
+			break;
+	}
+
+	tv_priv->tv_format = tv_mode->name;
+	drm_connector_property_set_value(connector,
+		connector->dev->mode_config.tv_mode_property, i);
+}
+
 /**
  * Detect the TV connection.
  *
@@ -1473,6 +1502,7 @@
 	if (type < 0)
 		return connector_status_disconnected;
 
+	intel_tv_find_better_format(connector);
 	return connector_status_connected;
 }