lib/igt_kms, tests/testdisplay: allow probing of new connector modes

Fixup some fallout from the connector probing changes so testdisplay -m
will pick up newly hotplugged displays correctly.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org.

lib/igt_kms.c

@@ -533,18 +533,20 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
 }
 
 /**
- * kmstest_get_connector_config:
+ * _kmstest_connector_config:
  * @drm_fd: DRM fd
  * @connector_id: DRM connector id
  * @crtc_idx_mask: mask of allowed DRM CRTC indices
  * @config: structure filled with the possible configuration
+ * @probe: whether to fully re-probe mode list or not
  *
  * This tries to find a suitable configuration for the given connector and CRTC
  * constraint and fills it into @config.
  */
-bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
+static bool _kmstest_connector_config(int drm_fd, uint32_t connector_id,
 				      unsigned long crtc_idx_mask,
-				  struct kmstest_connector_config *config)
+				      struct kmstest_connector_config *config,
+				      bool probe)
 {
 	drmModeRes *resources;
 	drmModeConnector *connector;
@@ -558,7 +560,11 @@ bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
 	}
 
 	/* First, find the connector & mode */
+	if (probe)
+		connector = drmModeGetConnector(drm_fd, connector_id);
+	else
 		connector = drmModeGetConnectorCurrent(drm_fd, connector_id);
+
 	if (!connector)
 		goto err2;
 
@@ -633,6 +639,43 @@ err1:
 	return false;
 }
 
+/**
+ * kmstest_get_connector_config:
+ * @drm_fd: DRM fd
+ * @connector_id: DRM connector id
+ * @crtc_idx_mask: mask of allowed DRM CRTC indices
+ * @config: structure filled with the possible configuration
+ *
+ * This tries to find a suitable configuration for the given connector and CRTC
+ * constraint and fills it into @config.
+ */
+bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
+				  unsigned long crtc_idx_mask,
+				  struct kmstest_connector_config *config)
+{
+	return _kmstest_connector_config(drm_fd, connector_id, crtc_idx_mask,
+					 config, 0);
+}
+
+/**
+ * kmstest_probe_connector_config:
+ * @drm_fd: DRM fd
+ * @connector_id: DRM connector id
+ * @crtc_idx_mask: mask of allowed DRM CRTC indices
+ * @config: structure filled with the possible configuration
+ *
+ * This tries to find a suitable configuration for the given connector and CRTC
+ * constraint and fills it into @config, fully probing the connector in the
+ * process.
+ */
+bool kmstest_probe_connector_config(int drm_fd, uint32_t connector_id,
+				    unsigned long crtc_idx_mask,
+				    struct kmstest_connector_config *config)
+{
+	return _kmstest_connector_config(drm_fd, connector_id, crtc_idx_mask,
+					 config, 1);
+}
+
 /**
  * kmstest_free_connector_config:
  * @config: connector configuration structure

lib/igt_kms.h

@@ -140,6 +140,9 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
 bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
 				  unsigned long crtc_idx_mask,
 				  struct kmstest_connector_config *config);
+bool kmstest_probe_connector_config(int drm_fd, uint32_t connector_id,
+				    unsigned long crtc_idx_mask,
+				    struct kmstest_connector_config *config);
 void kmstest_free_connector_config(struct kmstest_connector_config *config);
 
 void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);

tests/testdisplay.c

@@ -191,12 +191,19 @@ static void dump_info(void)
 
 static void connector_find_preferred_mode(uint32_t connector_id,
 					  unsigned long crtc_idx_mask,
-					  int mode_num, struct connector *c)
+					  int mode_num, struct connector *c,
+					  bool probe)
 {
 	struct kmstest_connector_config config;
+	bool ret;
 
-	if (!kmstest_get_connector_config(drm_fd, connector_id, crtc_idx_mask,
-					  &config)) {
+	if (probe)
+		ret = kmstest_probe_connector_config(drm_fd, connector_id,
+						     crtc_idx_mask, &config);
+	else
+		ret = kmstest_get_connector_config(drm_fd, connector_id,
+						   crtc_idx_mask, &config);
+	if (!ret) {
 		c->mode_valid = 0;
 		return;
 	}
@@ -456,7 +463,7 @@ set_stereo_mode(struct connector *c)
  * Each connector has a corresponding encoder, except in the SDVO case
  * where an encoder may have multiple connectors.
  */
-int update_display(void)
+int update_display(bool probe)
 {
 	struct connector *connectors;
 	int c;
@@ -488,7 +495,7 @@ int update_display(void)
 			connector_find_preferred_mode(connector->id,
 						      crtc_idx_mask,
 						      specified_mode_num,
-						      connector);
+						      connector, probe);
 			if (!connector->mode_valid)
 				continue;
 
@@ -513,7 +520,7 @@ int update_display(void)
 			connector_find_preferred_mode(connector->id,
 						      -1UL,
 						      specified_mode_num,
-						      connector);
+						      connector, probe);
 			if (!connector->mode_valid)
 				continue;
 
@@ -765,7 +772,7 @@ int main(int argc, char **argv)
 
 	ret = 0;
 
-	if (!update_display()) {
+	if (!update_display(false)) {
 		ret = 1;
 		goto out_stdio;
 	}

tests/testdisplay.h

@@ -32,4 +32,4 @@ gboolean testdisplay_setup_hotplug(void);
 void testdisplay_cleanup_hotplug(void);
 
 /* called by the hotplug code */
-int update_display(void);
+int update_display(bool probe);

tests/testdisplay_hotplug.c

@@ -59,7 +59,7 @@ static gboolean hotplug_event(GIOChannel *source, GIOCondition condition,
 
 	if (memcmp(&s.st_rdev, &udev_devnum, sizeof(dev_t)) == 0 &&
 	    hotplug && atoi(hotplug) == 1)
-		update_display();
+		update_display(true);
 
 	udev_device_unref(dev);
 out: