drm: xlnx: zynqmp_dpsub: Move DRM/KMS initialization to separate file

Start preparation for using the DPSUB as a standalone DisplayPort
encoder without a display controller by moving the DRM/KMS
initialization to a new zynqmp_kms.c file. No functional change
intended.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
new file mode 100644
index 000000000000..e4e7f8fd96d2
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP DisplayPort Subsystem - KMS API
+ *
+ * Copyright (C) 2017 - 2021 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "zynqmp_disp.h"
+#include "zynqmp_dp.h"
+#include "zynqmp_dpsub.h"
+#include "zynqmp_kms.h"
+
+/* -----------------------------------------------------------------------------
+ * Initialization
+ */
+
+int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub)
+{
+	struct drm_encoder *encoder = &dpsub->encoder;
+	struct drm_connector *connector;
+	int ret;
+
+	/*
+	 * Initialize the DISP and DP components. This will creates planes,
+	 * CRTC, and a bridge for the DP encoder.
+	 */
+	ret = zynqmp_disp_drm_init(dpsub);
+	if (ret)
+		return ret;
+
+	ret = zynqmp_dp_drm_init(dpsub);
+	if (ret)
+		return ret;
+
+	/* Create the encoder and attach the bridge. */
+	encoder->possible_crtcs |= zynqmp_disp_get_crtc_mask(dpsub->disp);
+	drm_simple_encoder_init(&dpsub->drm, encoder, DRM_MODE_ENCODER_NONE);
+
+	ret = drm_bridge_attach(encoder, dpsub->bridge, NULL,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+	if (ret) {
+		dev_err(dpsub->dev, "failed to attach bridge to encoder\n");
+		return ret;
+	}
+
+	/* Create the connector for the chain of bridges. */
+	connector = drm_bridge_connector_init(&dpsub->drm, encoder);
+	if (IS_ERR(connector)) {
+		dev_err(dpsub->dev, "failed to created connector\n");
+		return PTR_ERR(connector);
+	}
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret < 0) {
+		dev_err(dpsub->dev, "failed to attach connector to encoder\n");
+		return ret;
+	}
+
+	return 0;
+}