1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24#define nv04_disp_root(p) container_of((p), struct nv04_disp_root, object)
25#include "priv.h"
26
27#include <core/client.h>
28
29#include <nvif/class.h>
30#include <nvif/unpack.h>
31
32struct nv04_disp_root {
33	struct nvkm_object object;
34	struct nvkm_disp *disp;
35};
36
37static int
38nv04_disp_scanoutpos(struct nv04_disp_root *root,
39		     void *data, u32 size, int head)
40{
41	struct nvkm_device *device = root->disp->engine.subdev.device;
42	struct nvkm_object *object = &root->object;
43	const u32 hoff = head * 0x2000;
44	union {
45		struct nv04_disp_scanoutpos_v0 v0;
46	} *args = data;
47	u32 line;
48	int ret;
49
50	nvif_ioctl(object, "disp scanoutpos size %d\n", size);
51	if (nvif_unpack(args->v0, 0, 0, false)) {
52		nvif_ioctl(object, "disp scanoutpos vers %d\n",
53			   args->v0.version);
54		args->v0.vblanks = nvkm_rd32(device, 0x680800 + hoff) & 0xffff;
55		args->v0.vtotal  = nvkm_rd32(device, 0x680804 + hoff) & 0xffff;
56		args->v0.vblanke = args->v0.vtotal - 1;
57
58		args->v0.hblanks = nvkm_rd32(device, 0x680820 + hoff) & 0xffff;
59		args->v0.htotal  = nvkm_rd32(device, 0x680824 + hoff) & 0xffff;
60		args->v0.hblanke = args->v0.htotal - 1;
61
62		/*
63		 * If output is vga instead of digital then vtotal/htotal is
64		 * invalid so we have to give up and trigger the timestamping
65		 * fallback in the drm core.
66		 */
67		if (!args->v0.vtotal || !args->v0.htotal)
68			return -ENOTSUPP;
69
70		args->v0.time[0] = ktime_to_ns(ktime_get());
71		line = nvkm_rd32(device, 0x600868 + hoff);
72		args->v0.time[1] = ktime_to_ns(ktime_get());
73		args->v0.hline = (line & 0xffff0000) >> 16;
74		args->v0.vline = (line & 0x0000ffff);
75	} else
76		return ret;
77
78	return 0;
79}
80
81static int
82nv04_disp_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
83{
84	struct nv04_disp_root *root = nv04_disp_root(object);
85	union {
86		struct nv04_disp_mthd_v0 v0;
87	} *args = data;
88	int head, ret;
89
90	nvif_ioctl(object, "disp mthd size %d\n", size);
91	if (nvif_unpack(args->v0, 0, 0, true)) {
92		nvif_ioctl(object, "disp mthd vers %d mthd %02x head %d\n",
93			   args->v0.version, args->v0.method, args->v0.head);
94		mthd = args->v0.method;
95		head = args->v0.head;
96	} else
97		return ret;
98
99	if (head < 0 || head >= 2)
100		return -ENXIO;
101
102	switch (mthd) {
103	case NV04_DISP_SCANOUTPOS:
104		return nv04_disp_scanoutpos(root, data, size, head);
105	default:
106		break;
107	}
108
109	return -EINVAL;
110}
111
112static const struct nvkm_object_func
113nv04_disp_root = {
114	.mthd = nv04_disp_mthd,
115	.ntfy = nvkm_disp_ntfy,
116};
117
118static int
119nv04_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass,
120		   void *data, u32 size, struct nvkm_object **pobject)
121{
122	struct nv04_disp_root *root;
123
124	if (!(root = kzalloc(sizeof(*root), GFP_KERNEL)))
125		return -ENOMEM;
126	root->disp = disp;
127	*pobject = &root->object;
128
129	nvkm_object_ctor(&nv04_disp_root, oclass, &root->object);
130	return 0;
131}
132
133const struct nvkm_disp_oclass
134nv04_disp_root_oclass = {
135	.base.oclass = NV04_DISP,
136	.base.minver = -1,
137	.base.maxver = -1,
138	.ctor = nv04_disp_root_new,
139};
140