1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
new file mode 100644
index 000000000000..fd9f18144c26
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2021 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#define nvkm_uconn(p) container_of((p), struct nvkm_conn, object)
+#include "conn.h"
+
+#include <subdev/gpio.h>
+
+#include <nvif/if0011.h>
+
+static int
+nvkm_uconn_mthd_hpd_status(struct nvkm_conn *conn, void *argv, u32 argc)
+{
+	struct nvkm_gpio *gpio = conn->disp->engine.subdev.device->gpio;
+	union nvif_conn_hpd_status_args *args = argv;
+
+	if (argc != sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+
+	args->v0.support = gpio && conn->info.hpd != DCB_GPIO_UNUSED;
+	args->v0.present = 0;
+
+	if (args->v0.support) {
+		int ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, conn->info.hpd);
+
+		if (WARN_ON(ret < 0)) {
+			args->v0.support = false;
+			return 0;
+		}
+
+		args->v0.present = ret;
+	}
+
+	return 0;
+}
+
+static int
+nvkm_uconn_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
+{
+	struct nvkm_conn *conn = nvkm_uconn(object);
+
+	switch (mthd) {
+	case NVIF_CONN_V0_HPD_STATUS: return nvkm_uconn_mthd_hpd_status(conn, argv, argc);
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static void *
+nvkm_uconn_dtor(struct nvkm_object *object)
+{
+	struct nvkm_conn *conn = nvkm_uconn(object);
+	struct nvkm_disp *disp = conn->disp;
+
+	spin_lock(&disp->client.lock);
+	conn->object.func = NULL;
+	spin_unlock(&disp->client.lock);
+	return NULL;
+}
+
+static const struct nvkm_object_func
+nvkm_uconn = {
+	.dtor = nvkm_uconn_dtor,
+	.mthd = nvkm_uconn_mthd,
+};
+
+int
+nvkm_uconn_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
+{
+	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
+	struct nvkm_conn *cont, *conn = NULL;
+	union nvif_conn_args *args = argv;
+	int ret;
+
+	if (argc != sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+
+	list_for_each_entry(cont, &disp->conns, head) {
+		if (cont->index == args->v0.id) {
+			conn = cont;
+			break;
+		}
+	}
+
+	if (!conn)
+		return -EINVAL;
+
+	ret = -EBUSY;
+	spin_lock(&disp->client.lock);
+	if (!conn->object.func) {
+		nvkm_object_ctor(&nvkm_uconn, oclass, &conn->object);
+		*pobject = &conn->object;
+		ret = 0;
+	}
+	spin_unlock(&disp->client.lock);
+	return ret;
+}