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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 | |
4dc28134 | 28 | #include "nouveau_drv.h" |
b01f0608 | 29 | #include "nouveau_connector.h" |
6ee73861 | 30 | #include "nouveau_encoder.h" |
27a45987 | 31 | #include "nouveau_crtc.h" |
6ee73861 | 32 | |
52aa30f2 BS |
33 | #include <nvif/class.h> |
34 | #include <nvif/cl5070.h> | |
35 | ||
f479c0ba BS |
36 | MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)"); |
37 | static int nouveau_mst = 1; | |
38 | module_param_named(mst, nouveau_mst, int, 0400); | |
39 | ||
6225ee05 | 40 | static void |
2aa5eac5 | 41 | nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd) |
6225ee05 | 42 | { |
77145f1c | 43 | struct nouveau_drm *drm = nouveau_drm(dev); |
6225ee05 AJ |
44 | u8 buf[3]; |
45 | ||
46 | if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
47 | return; | |
48 | ||
2aa5eac5 | 49 | if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3)) |
77145f1c | 50 | NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n", |
6225ee05 AJ |
51 | buf[0], buf[1], buf[2]); |
52 | ||
2aa5eac5 | 53 | if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3)) |
77145f1c | 54 | NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n", |
6225ee05 AJ |
55 | buf[0], buf[1], buf[2]); |
56 | ||
57 | } | |
58 | ||
8777c5c1 BS |
59 | int |
60 | nouveau_dp_detect(struct nouveau_encoder *nv_encoder) | |
6ee73861 | 61 | { |
8777c5c1 | 62 | struct drm_device *dev = nv_encoder->base.base.dev; |
77145f1c | 63 | struct nouveau_drm *drm = nouveau_drm(dev); |
2aa5eac5 | 64 | struct nvkm_i2c_aux *aux; |
f20c665c | 65 | u8 dpcd[8]; |
6ee73861 BS |
66 | int ret; |
67 | ||
2aa5eac5 BS |
68 | aux = nv_encoder->aux; |
69 | if (!aux) | |
8777c5c1 | 70 | return -ENODEV; |
52e0d0ec | 71 | |
f20c665c | 72 | ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd)); |
6ee73861 | 73 | if (ret) |
8777c5c1 | 74 | return ret; |
6ee73861 | 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 | |
2aa5eac5 | 93 | nouveau_dp_probe_oui(dev, aux, dpcd); |
52aa30f2 | 94 | |
f479c0ba BS |
95 | ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst); |
96 | if (ret == 1) | |
97 | return NOUVEAU_DP_MST; | |
52aa30f2 BS |
98 | if (ret == 0) |
99 | return NOUVEAU_DP_SST; | |
100 | return ret; | |
6ee73861 | 101 | } |