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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
25#include <drm/drmP.h>
26#include <drm/drm_dp_helper.h>
27
28#include "nouveau_drm.h"
29#include "nouveau_connector.h"
30#include "nouveau_encoder.h"
31#include "nouveau_crtc.h"
32
33static void
34nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
35{
36 struct nouveau_drm *drm = nouveau_drm(dev);
37 u8 buf[3];
38
39 if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
40 return;
41
42 if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3))
43 NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
44 buf[0], buf[1], buf[2]);
45
46 if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3))
47 NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
48 buf[0], buf[1], buf[2]);
49
50}
51
52int
53nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
54{
55 struct drm_device *dev = nv_encoder->base.base.dev;
56 struct nouveau_drm *drm = nouveau_drm(dev);
57 struct nvkm_i2c_aux *aux;
58 u8 *dpcd = nv_encoder->dp.dpcd;
59 int ret;
60
61 aux = nv_encoder->aux;
62 if (!aux)
63 return -ENODEV;
64
65 ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, 8);
66 if (ret)
67 return ret;
68
69 nv_encoder->dp.link_bw = 27000 * dpcd[1];
70 nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
71
72 NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
73 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
74 NV_DEBUG(drm, "encoder: %dx%d\n",
75 nv_encoder->dcb->dpconf.link_nr,
76 nv_encoder->dcb->dpconf.link_bw);
77
78 if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
79 nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
80 if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
81 nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
82
83 NV_DEBUG(drm, "maximum: %dx%d\n",
84 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
85
86 nouveau_dp_probe_oui(dev, aux, dpcd);
87 return 0;
88}
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
25#include <drm/drm_dp_helper.h>
26
27#include "nouveau_drv.h"
28#include "nouveau_connector.h"
29#include "nouveau_encoder.h"
30#include "nouveau_crtc.h"
31
32#include <nvif/class.h>
33#include <nvif/cl5070.h>
34
35MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
36static int nouveau_mst = 1;
37module_param_named(mst, nouveau_mst, int, 0400);
38
39static void
40nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
41{
42 struct nouveau_drm *drm = nouveau_drm(dev);
43 u8 buf[3];
44
45 if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
46 return;
47
48 if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3))
49 NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
50 buf[0], buf[1], buf[2]);
51
52 if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3))
53 NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
54 buf[0], buf[1], buf[2]);
55
56}
57
58int
59nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
60{
61 struct drm_device *dev = nv_encoder->base.base.dev;
62 struct nouveau_drm *drm = nouveau_drm(dev);
63 struct nvkm_i2c_aux *aux;
64 u8 dpcd[8];
65 int ret;
66
67 aux = nv_encoder->aux;
68 if (!aux)
69 return -ENODEV;
70
71 ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));
72 if (ret)
73 return ret;
74
75 nv_encoder->dp.link_bw = 27000 * dpcd[1];
76 nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
77
78 NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
79 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
80 NV_DEBUG(drm, "encoder: %dx%d\n",
81 nv_encoder->dcb->dpconf.link_nr,
82 nv_encoder->dcb->dpconf.link_bw);
83
84 if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
85 nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
86 if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
87 nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
88
89 NV_DEBUG(drm, "maximum: %dx%d\n",
90 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
91
92 nouveau_dp_probe_oui(dev, aux, dpcd);
93
94 ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst);
95 if (ret == 1)
96 return NOUVEAU_DP_MST;
97 if (ret == 0)
98 return NOUVEAU_DP_SST;
99 return ret;
100}