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@@ -0,0 +1,128 @@
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+/*
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+ * ARC PGU DRM driver.
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+ *
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+ * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+
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+#include <drm/drm_crtc_helper.h>
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+#include <drm/drm_encoder_slave.h>
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+#include <drm/drm_atomic_helper.h>
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+
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+#include "arcpgu.h"
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+
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+#define XRES_DEF 640
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+#define YRES_DEF 480
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+
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+#define XRES_MAX 8192
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+#define YRES_MAX 8192
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+
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+
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+struct arcpgu_drm_connector {
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+ struct drm_connector connector;
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+ struct drm_encoder_slave *encoder_slave;
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+};
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+
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+static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
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+{
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+ int count;
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+
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+ count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
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+ drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
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+ return count;
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+}
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+
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+static enum drm_connector_status
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+arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
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+{
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+ return connector_status_connected;
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+}
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+
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+static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
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+{
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+ drm_connector_unregister(connector);
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+ drm_connector_cleanup(connector);
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+}
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+
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+static const struct drm_connector_helper_funcs
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+arcpgu_drm_connector_helper_funcs = {
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+ .get_modes = arcpgu_drm_connector_get_modes,
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+};
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+
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+static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
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+ .dpms = drm_helper_connector_dpms,
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+ .reset = drm_atomic_helper_connector_reset,
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+ .detect = arcpgu_drm_connector_detect,
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+ .fill_modes = drm_helper_probe_single_connector_modes,
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+ .destroy = arcpgu_drm_connector_destroy,
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+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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+};
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+
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+static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
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+ .destroy = drm_encoder_cleanup,
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+};
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+
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+int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np)
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+{
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+ struct arcpgu_drm_connector *arcpgu_connector;
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+ struct drm_encoder_slave *encoder;
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+ struct drm_connector *connector;
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+ int ret;
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+
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+ encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
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+ if (encoder == NULL)
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+ return -ENOMEM;
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+
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+ encoder->base.possible_crtcs = 1;
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+ encoder->base.possible_clones = 0;
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+
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+ ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs,
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+ DRM_MODE_ENCODER_VIRTUAL, NULL);
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+ if (ret)
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+ return ret;
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+
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+ arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector),
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+ GFP_KERNEL);
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+ if (!arcpgu_connector) {
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+ ret = -ENOMEM;
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+ goto error_encoder_cleanup;
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+ }
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+
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+ connector = &arcpgu_connector->connector;
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+ drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs);
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+
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+ ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs,
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+ DRM_MODE_CONNECTOR_VIRTUAL);
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+ if (ret < 0) {
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+ dev_err(drm->dev, "failed to initialize drm connector\n");
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+ goto error_encoder_cleanup;
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+ }
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+
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+ ret = drm_mode_connector_attach_encoder(connector, &encoder->base);
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+ if (ret < 0) {
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+ dev_err(drm->dev, "could not attach connector to encoder\n");
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+ drm_connector_unregister(connector);
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+ goto error_connector_cleanup;
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+ }
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+
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+ arcpgu_connector->encoder_slave = encoder;
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+
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+ return 0;
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+
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+error_connector_cleanup:
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+ drm_connector_cleanup(connector);
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+
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+error_encoder_cleanup:
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+ drm_encoder_cleanup(&encoder->base);
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+ return ret;
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+}
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Dave Airlie