1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dc/dc-kms.c b/drivers/gpu/drm/imx/dc/dc-kms.c
new file mode 100644
index 000000000000..2b18aa37a4a8
--- /dev/null
+++ b/drivers/gpu/drm/imx/dc/dc-kms.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/of.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mode_config.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "dc-de.h"
+#include "dc-drv.h"
+#include "dc-kms.h"
+
+static const struct drm_mode_config_funcs dc_drm_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static int dc_kms_init_encoder_per_crtc(struct dc_drm_device *dc_drm,
+					int crtc_index)
+{
+	struct dc_crtc *dc_crtc = &dc_drm->dc_crtc[crtc_index];
+	struct drm_device *drm = &dc_drm->base;
+	struct drm_crtc *crtc = &dc_crtc->base;
+	struct drm_connector *connector;
+	struct device *dev = drm->dev;
+	struct drm_encoder *encoder;
+	struct drm_bridge *bridge;
+	int ret;
+
+	bridge = devm_drm_of_get_bridge(dev, dc_crtc->de->tc->dev->of_node,
+					0, 0);
+	if (IS_ERR(bridge)) {
+		ret = PTR_ERR(bridge);
+		if (ret == -ENODEV)
+			return 0;
+
+		return dev_err_probe(dev, ret,
+				     "failed to find bridge for CRTC%u\n",
+				     crtc->index);
+	}
+
+	encoder = &dc_drm->encoder[crtc_index];
+	ret = drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_NONE);
+	if (ret) {
+		dev_err(dev, "failed to initialize encoder for CRTC%u: %d\n",
+			crtc->index, ret);
+		return ret;
+	}
+
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+	ret = drm_bridge_attach(encoder, bridge, NULL,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+	if (ret) {
+		dev_err(dev,
+			"failed to attach bridge to encoder for CRTC%u: %d\n",
+			crtc->index, ret);
+		return ret;
+	}
+
+	connector = drm_bridge_connector_init(drm, encoder);
+	if (IS_ERR(connector)) {
+		ret = PTR_ERR(connector);
+		dev_err(dev, "failed to init bridge connector for CRTC%u: %d\n",
+			crtc->index, ret);
+		return ret;
+	}
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret)
+		dev_err(dev,
+			"failed to attach encoder to connector for CRTC%u: %d\n",
+			crtc->index, ret);
+
+	return ret;
+}
+
+int dc_kms_init(struct dc_drm_device *dc_drm)
+{
+	struct drm_device *drm = &dc_drm->base;
+	int ret, i;
+
+	ret = drmm_mode_config_init(drm);
+	if (ret)
+		return ret;
+
+	drm->mode_config.min_width = 60;
+	drm->mode_config.min_height = 60;
+	drm->mode_config.max_width = 8192;
+	drm->mode_config.max_height = 8192;
+	drm->mode_config.funcs = &dc_drm_mode_config_funcs;
+
+	drm->vblank_disable_immediate = true;
+	drm->max_vblank_count = DC_FRAMEGEN_MAX_FRAME_INDEX;
+
+	for (i = 0; i < DC_DISPLAYS; i++) {
+		ret = dc_crtc_init(dc_drm, i);
+		if (ret)
+			return ret;
+
+		ret = dc_kms_init_encoder_per_crtc(dc_drm, i);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < DC_DISPLAYS; i++) {
+		ret = dc_crtc_post_init(dc_drm, i);
+		if (ret)
+			return ret;
+	}
+
+	ret = drm_vblank_init(drm, DC_DISPLAYS);
+	if (ret) {
+		dev_err(drm->dev, "failed to init vblank support: %d\n", ret);
+		return ret;
+	}
+
+	drm_mode_config_reset(drm);
+
+	drm_kms_helper_poll_init(drm);
+
+	return 0;
+}
+
+void dc_kms_uninit(struct dc_drm_device *dc_drm)
+{
+	drm_kms_helper_poll_fini(&dc_drm->base);
+}