1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
new file mode 100644
index 000000000000..abedb3e86361
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
@@ -0,0 +1,129 @@
+/*
+ * 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_uoutp(p) container_of((p), struct nvkm_outp, object)
+#include "outp.h"
+#include "ior.h"
+
+#include <nvif/if0012.h>
+
+static int
+nvkm_uoutp_mthd_load_detect(struct nvkm_outp *outp, void *argv, u32 argc)
+{
+	union nvif_outp_load_detect_args *args = argv;
+	int ret;
+
+	if (argc != sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+
+	ret = nvkm_outp_acquire(outp, NVKM_OUTP_PRIV, false);
+	if (ret == 0) {
+		if (outp->ior->func->sense) {
+			ret = outp->ior->func->sense(outp->ior, args->v0.data);
+			args->v0.load = ret < 0 ? 0 : ret;
+		} else {
+			ret = -EINVAL;
+		}
+		nvkm_outp_release(outp, NVKM_OUTP_PRIV);
+	}
+
+	return ret;
+}
+
+static int
+nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc)
+{
+	switch (mthd) {
+	case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc);
+	default:
+		break;
+	}
+
+	return 1;
+}
+
+static int
+nvkm_uoutp_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
+{
+	struct nvkm_outp *outp = nvkm_uoutp(object);
+	struct nvkm_disp *disp = outp->disp;
+	int ret;
+
+	mutex_lock(&disp->super.mutex);
+
+	ret = nvkm_uoutp_mthd_noacquire(outp, mthd, argv, argc);
+	if (ret <= 0)
+		goto done;
+
+done:
+	mutex_unlock(&disp->super.mutex);
+	return ret;
+}
+
+static void *
+nvkm_uoutp_dtor(struct nvkm_object *object)
+{
+	struct nvkm_outp *outp = nvkm_uoutp(object);
+	struct nvkm_disp *disp = outp->disp;
+
+	spin_lock(&disp->client.lock);
+	outp->object.func = NULL;
+	spin_unlock(&disp->client.lock);
+	return NULL;
+}
+
+static const struct nvkm_object_func
+nvkm_uoutp = {
+	.dtor = nvkm_uoutp_dtor,
+	.mthd = nvkm_uoutp_mthd,
+};
+
+int
+nvkm_uoutp_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
+{
+	struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
+	struct nvkm_outp *outt, *outp = NULL;
+	union nvif_outp_args *args = argv;
+	int ret;
+
+	if (argc != sizeof(args->v0) || args->v0.version != 0)
+		return -ENOSYS;
+
+	list_for_each_entry(outt, &disp->outps, head) {
+		if (outt->index == args->v0.id) {
+			outp = outt;
+			break;
+		}
+	}
+
+	if (!outp)
+		return -EINVAL;
+
+	ret = -EBUSY;
+	spin_lock(&disp->client.lock);
+	if (!outp->object.func) {
+		nvkm_object_ctor(&nvkm_uoutp, oclass, &outp->object);
+		*pobject = &outp->object;
+		ret = 0;
+	}
+	spin_unlock(&disp->client.lock);
+	return ret;
+}