1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/head.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/head.c
new file mode 100644
index 000000000000..5c557f3e6c2c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/head.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2017 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.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "head.h"
+
+#include <core/client.h>
+
+#include <nvif/cl0046.h>
+#include <nvif/unpack.h>
+
+struct nvkm_head *
+nvkm_head_find(struct nvkm_disp *disp, int id)
+{
+	struct nvkm_head *head;
+	list_for_each_entry(head, &disp->head, head) {
+		if (head->id == id)
+			return head;
+	}
+	return NULL;
+}
+
+int
+nvkm_head_mthd_scanoutpos(struct nvkm_object *object,
+			  struct nvkm_head *head, void *data, u32 size)
+{
+	union {
+		struct nv04_disp_scanoutpos_v0 v0;
+	} *args = data;
+	int ret = -ENOSYS;
+
+	nvif_ioctl(object, "head scanoutpos size %d\n", size);
+	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
+		nvif_ioctl(object, "head scanoutpos vers %d\n",
+			   args->v0.version);
+
+		head->func->state(head, &head->arm);
+		args->v0.vtotal  = head->arm.vtotal;
+		args->v0.vblanks = head->arm.vblanks;
+		args->v0.vblanke = head->arm.vblanke;
+		args->v0.htotal  = head->arm.htotal;
+		args->v0.hblanks = head->arm.hblanks;
+		args->v0.hblanke = head->arm.hblanke;
+
+		/* We don't support reading htotal/vtotal on pre-NV50 VGA,
+		 * so we have to give up and trigger the timestamping
+		 * fallback in the drm core.
+		 */
+		if (!args->v0.vtotal || !args->v0.htotal)
+			return -ENOTSUPP;
+
+		args->v0.time[0] = ktime_to_ns(ktime_get());
+		head->func->rgpos(head, &args->v0.hline, &args->v0.vline);
+		args->v0.time[1] = ktime_to_ns(ktime_get());
+	} else
+		return ret;
+
+	return 0;
+}
+
+void
+nvkm_head_del(struct nvkm_head **phead)
+{
+	struct nvkm_head *head = *phead;
+	if (head) {
+		HEAD_DBG(head, "dtor");
+		list_del(&head->head);
+		kfree(*phead);
+		*phead = NULL;
+	}
+}
+
+int
+nvkm_head_new_(const struct nvkm_head_func *func,
+	       struct nvkm_disp *disp, int id)
+{
+	struct nvkm_head *head;
+	if (!(head = kzalloc(sizeof(*head), GFP_KERNEL)))
+		return -ENOMEM;
+	head->func = func;
+	head->disp = disp;
+	head->id = id;
+	list_add_tail(&head->head, &disp->head);
+	HEAD_DBG(head, "ctor");
+	return 0;
+}