[PATCH 4/4] drm/i915/sdvo: implement correct return value for ->get_modes

[daniel.vetter at ffwll.ch (Daniel Vetter)]

We should return the number of added modes. Luckily no one really
cares, but it kinda sticked out compared to the other ->get_modes
functions I've looked at recently.

Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_sdvo.c |   41 ++++++++++++++++++++++--------------
 1 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 10ae2d3..0d6116d 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1439,8 +1439,9 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
 	return ret;
 }
 
-static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
+static int intel_sdvo_get_ddc_modes(struct drm_connector *connector)
 {
+	int ret = 0;
 	struct edid *edid;
 
 	/* set the bus switch and get the modes */
@@ -1459,12 +1460,14 @@ static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
 		if (intel_sdvo_connector_matches_edid(to_intel_sdvo_connector(connector),
 						      edid)) {
 			drm_mode_connector_update_edid_property(connector, edid);
-			drm_add_edid_modes(connector, edid);
+			ret = drm_add_edid_modes(connector, edid);
 		}
 
 		connector->display_info.raw_edid = NULL;
 		kfree(edid);
 	}
+
+	return ret;
 }
 
 /*
@@ -1532,12 +1535,12 @@ static const struct drm_display_mode sdvo_tv_modes[] = {
 		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
 };
 
-static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
+static int intel_sdvo_get_tv_modes(struct drm_connector *connector)
 {
 	struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
 	struct intel_sdvo_sdtv_resolution_request tv_res;
 	uint32_t reply = 0, format_map = 0;
-	int i;
+	int i, ret = 0;
 
 	/* Read the list of supported input resolutions for the selected TV
 	 * format.
@@ -1547,39 +1550,44 @@ static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
 	       min(sizeof(format_map), sizeof(struct intel_sdvo_sdtv_resolution_request)));
 
 	if (!intel_sdvo_set_target_output(intel_sdvo, intel_sdvo->attached_output))
-		return;
+		return 0;
 
 	BUILD_BUG_ON(sizeof(tv_res) != 3);
 	if (!intel_sdvo_write_cmd(intel_sdvo,
 				  SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT,
 				  &tv_res, sizeof(tv_res)))
-		return;
+		return 0;
 	if (!intel_sdvo_read_response(intel_sdvo, &reply, 3))
-		return;
+		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(sdvo_tv_modes); i++)
 		if (reply & (1 << i)) {
 			struct drm_display_mode *nmode;
 			nmode = drm_mode_duplicate(connector->dev,
 						   &sdvo_tv_modes[i]);
-			if (nmode)
+			if (nmode) {
 				drm_mode_probed_add(connector, nmode);
+				ret++;
+			}
 		}
+
+	return ret;
 }
 
-static void intel_sdvo_get_lvds_modes(struct drm_connector *connector)
+static int intel_sdvo_get_lvds_modes(struct drm_connector *connector)
 {
 	struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;
 	struct drm_display_mode *newmode;
+	int ret;
 
 	/*
 	 * Attempt to get the mode list from DDC.
 	 * Assume that the preferred modes are
 	 * arranged in priority order.
 	 */
-	intel_ddc_get_modes(connector, intel_sdvo->i2c);
-	if (list_empty(&connector->probed_modes) == false)
+	ret = intel_ddc_get_modes(connector, intel_sdvo->i2c);
+	if (ret)
 		goto end;
 
 	/* Fetch modes from VBT */
@@ -1591,6 +1599,8 @@ static void intel_sdvo_get_lvds_modes(struct drm_connector *connector)
 			newmode->type = (DRM_MODE_TYPE_PREFERRED |
 					 DRM_MODE_TYPE_DRIVER);
 			drm_mode_probed_add(connector, newmode);
+
+			ret++;
 		}
 	}
 
@@ -1605,6 +1615,7 @@ end:
 		}
 	}
 
+	return ret;
 }
 
 static int intel_sdvo_get_modes(struct drm_connector *connector)
@@ -1612,13 +1623,11 @@ static int intel_sdvo_get_modes(struct drm_connector *connector)
 	struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
 
 	if (IS_TV(intel_sdvo_connector))
-		intel_sdvo_get_tv_modes(connector);
+		return intel_sdvo_get_tv_modes(connector);
 	else if (IS_LVDS(intel_sdvo_connector))
-		intel_sdvo_get_lvds_modes(connector);
+		return intel_sdvo_get_lvds_modes(connector);
 	else
-		intel_sdvo_get_ddc_modes(connector);
-
-	return !list_empty(&connector->probed_modes);
+		return intel_sdvo_get_ddc_modes(connector);
 }
 
 static void
-- 
1.7.7.6