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6ee73861 BS |
1 | /* |
2 | * Copyright 2009 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 | ||
760285e7 | 25 | #include <drm/drmP.h> |
612a9aab | 26 | #include <drm/drm_dp_helper.h> |
b01f0608 | 27 | |
77145f1c | 28 | #include "nouveau_drm.h" |
b01f0608 | 29 | #include "nouveau_connector.h" |
6ee73861 | 30 | #include "nouveau_encoder.h" |
27a45987 | 31 | #include "nouveau_crtc.h" |
6ee73861 | 32 | |
6c8e4633 BS |
33 | #include <core/class.h> |
34 | ||
77145f1c BS |
35 | #include <subdev/gpio.h> |
36 | #include <subdev/i2c.h> | |
43720133 | 37 | |
6225ee05 | 38 | static void |
4196faa8 | 39 | nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch, |
6225ee05 AJ |
40 | u8 *dpcd) |
41 | { | |
77145f1c | 42 | struct nouveau_drm *drm = nouveau_drm(dev); |
6225ee05 AJ |
43 | u8 buf[3]; |
44 | ||
45 | if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
46 | return; | |
47 | ||
77145f1c BS |
48 | if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3)) |
49 | NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n", | |
6225ee05 AJ |
50 | buf[0], buf[1], buf[2]); |
51 | ||
77145f1c BS |
52 | if (!nv_rdaux(auxch, DP_BRANCH_OUI, buf, 3)) |
53 | NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n", | |
6225ee05 AJ |
54 | buf[0], buf[1], buf[2]); |
55 | ||
56 | } | |
57 | ||
6ee73861 BS |
58 | bool |
59 | nouveau_dp_detect(struct drm_encoder *encoder) | |
60 | { | |
61 | struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder); | |
62 | struct drm_device *dev = encoder->dev; | |
77145f1c | 63 | struct nouveau_drm *drm = nouveau_drm(dev); |
4196faa8 | 64 | struct nouveau_i2c_port *auxch; |
52e0d0ec | 65 | u8 *dpcd = nv_encoder->dp.dpcd; |
6ee73861 BS |
66 | int ret; |
67 | ||
5ed50209 | 68 | auxch = nv_encoder->i2c; |
52e0d0ec BS |
69 | if (!auxch) |
70 | return false; | |
71 | ||
77145f1c | 72 | ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8); |
6ee73861 BS |
73 | if (ret) |
74 | return false; | |
75 | ||
75a1fccf BS |
76 | nv_encoder->dp.link_bw = 27000 * dpcd[1]; |
77 | nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK; | |
6ee73861 | 78 | |
77145f1c | 79 | NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n", |
75a1fccf | 80 | nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]); |
77145f1c | 81 | NV_DEBUG(drm, "encoder: %dx%d\n", |
75a1fccf BS |
82 | nv_encoder->dcb->dpconf.link_nr, |
83 | nv_encoder->dcb->dpconf.link_bw); | |
6ee73861 | 84 | |
75a1fccf | 85 | if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr) |
6ee73861 | 86 | nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr; |
75a1fccf BS |
87 | if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw) |
88 | nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw; | |
6ee73861 | 89 | |
77145f1c | 90 | NV_DEBUG(drm, "maximum: %dx%d\n", |
75a1fccf | 91 | nv_encoder->dp.link_nr, nv_encoder->dp.link_bw); |
fe224bb7 | 92 | |
6225ee05 AJ |
93 | nouveau_dp_probe_oui(dev, auxch, dpcd); |
94 | ||
6ee73861 BS |
95 | return true; |
96 | } |