drm/exynos/vidi: convert to struct drm_edid

Prefer the struct drm_edid based functions for storing the EDID and
updating the connector.

It would be better if the vidi connection ioctl passed in the EDID size
separately instead of relying on the extension count specified in the
EDID, but that's what we have to rely on.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_vidi.c

@@ -41,7 +41,7 @@ struct vidi_context {
 	struct exynos_drm_crtc		*crtc;
 	struct drm_connector		connector;
 	struct exynos_drm_plane		planes[WINDOWS_NR];
-	struct edid			*raw_edid;
+	const struct drm_edid		*raw_edid;
 	unsigned int			clkdiv;
 	unsigned int			connected;
 	bool				suspended;
@@ -245,23 +245,27 @@ int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
 	}
 
 	if (vidi->connection) {
-		struct edid *raw_edid;
+		const struct drm_edid *drm_edid;
+		const struct edid *raw_edid;
+		size_t size;
 
-		raw_edid = (struct edid *)(unsigned long)vidi->edid;
-		if (!drm_edid_is_valid(raw_edid)) {
+		raw_edid = (const struct edid *)(unsigned long)vidi->edid;
+		size = (raw_edid->extensions + 1) * EDID_LENGTH;
+
+		drm_edid = drm_edid_alloc(raw_edid, size);
+		if (!drm_edid)
+			return -ENOMEM;
+
+		if (!drm_edid_valid(drm_edid)) {
+			drm_edid_free(drm_edid);
 			DRM_DEV_DEBUG_KMS(ctx->dev,
 					  "edid data is invalid.\n");
 			return -EINVAL;
 		}
-		ctx->raw_edid = drm_edid_duplicate(raw_edid);
-		if (!ctx->raw_edid) {
-			DRM_DEV_DEBUG_KMS(ctx->dev,
-					  "failed to allocate raw_edid.\n");
-			return -ENOMEM;
-		}
+		ctx->raw_edid = drm_edid;
 	} else {
 		/* with connection = 0, free raw_edid */
-		kfree(ctx->raw_edid);
+		drm_edid_free(ctx->raw_edid);
 		ctx->raw_edid = NULL;
 	}
 
@@ -300,18 +304,22 @@ static const struct drm_connector_funcs vidi_connector_funcs = {
 static int vidi_get_modes(struct drm_connector *connector)
 {
 	struct vidi_context *ctx = ctx_from_connector(connector);
-	struct edid *edid;
+	const struct drm_edid *drm_edid;
 	int count;
 
-	edid = drm_edid_duplicate(ctx->raw_edid ?: fake_edid_info);
-	if (!edid)
+	if (ctx->raw_edid)
+		drm_edid = drm_edid_dup(ctx->raw_edid);
+	else
+		drm_edid = drm_edid_alloc(fake_edid_info, sizeof(fake_edid_info));
+
+	if (!drm_edid)
 		return 0;
 
-	drm_connector_update_edid_property(connector, edid);
+	drm_edid_connector_update(connector, drm_edid);
 
-	count = drm_add_edid_modes(connector, edid);
+	count = drm_edid_connector_add_modes(connector);
 
-	kfree(edid);
+	drm_edid_free(drm_edid);
 
 	return count;
 }
@@ -451,7 +459,7 @@ static void vidi_remove(struct platform_device *pdev)
 {
 	struct vidi_context *ctx = platform_get_drvdata(pdev);
 
-	kfree(ctx->raw_edid);
+	drm_edid_free(ctx->raw_edid);
 	ctx->raw_edid = NULL;
 
 	component_del(&pdev->dev, &vidi_component_ops);