1 /*
2 * Copyright 2016 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 <bskeggs@redhat.com>
23 */
24 #include "channv50.h"
25
26 #include <subdev/timer.h>
27
28 static int
29 gp102_disp_dmac_init(struct nv50_disp_chan *chan)
30 {
31 struct nvkm_subdev *subdev = &chan->disp->base.engine.subdev;
32 struct nvkm_device *device = subdev->device;
33 int ctrl = chan->chid.ctrl;
34 int user = chan->chid.user;
35
36 /* initialise channel for dma command submission */
37 nvkm_wr32(device, 0x611494 + (ctrl * 0x0010), chan->push);
38 nvkm_wr32(device, 0x611498 + (ctrl * 0x0010), 0x00010000);
39 nvkm_wr32(device, 0x61149c + (ctrl * 0x0010), 0x00000001);
40 nvkm_mask(device, 0x610490 + (ctrl * 0x0010), 0x00000010, 0x00000010);
41 nvkm_wr32(device, 0x640000 + (ctrl * 0x1000), 0x00000000);
42 nvkm_wr32(device, 0x610490 + (ctrl * 0x0010), 0x00000013);
43
44 /* wait for it to go inactive */
45 if (nvkm_msec(device, 2000,
46 if (!(nvkm_rd32(device, 0x610490 + (ctrl * 0x10)) & 0x80000000))
47 break;
48 ) < 0) {
49 nvkm_error(subdev, "ch %d init: %08x\n", user,
50 nvkm_rd32(device, 0x610490 + (ctrl * 0x10)));
51 return -EBUSY;
52 }
53
54 return 0;
55 }
56
57 const struct nv50_disp_chan_func
58 gp102_disp_dmac_func = {
59 .init = gp102_disp_dmac_init,
60 .fini = gf119_disp_dmac_fini,
61 .intr = gf119_disp_chan_intr,
62 .user = nv50_disp_chan_user,
63 .bind = gf119_disp_dmac_bind,
64 };