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Ben Skeggs6ee73862009-12-11 19:24:15 +10001/*
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
David Howells760285e2012-10-02 18:01:07 +010025#include <drm/drmP.h>
Linus Torvalds612a9aa2012-10-03 23:29:23 -070026#include <drm/drm_dp_helper.h>
Ben Skeggsb01f0602010-07-23 11:39:03 +100027
Ben Skeggs4dc28132016-05-20 09:22:55 +100028#include "nouveau_drv.h"
Ben Skeggsb01f0602010-07-23 11:39:03 +100029#include "nouveau_connector.h"
Ben Skeggs6ee73862009-12-11 19:24:15 +100030#include "nouveau_encoder.h"
Ben Skeggs27a45982011-08-04 09:26:44 +100031#include "nouveau_crtc.h"
Ben Skeggs6ee73862009-12-11 19:24:15 +100032
Ben Skeggs52aa30f2016-11-04 17:20:36 +100033#include <nvif/class.h>
34#include <nvif/cl5070.h>
35
Ben Skeggsf479c0b2016-11-04 17:20:36 +100036MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
37static int nouveau_mst = 1;
38module_param_named(mst, nouveau_mst, int, 0400);
39
Adam Jackson6225ee02012-05-14 16:05:49 -040040static void
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100041nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
Adam Jackson6225ee02012-05-14 16:05:49 -040042{
Ben Skeggs77145f12012-07-31 16:16:21 +100043 struct nouveau_drm *drm = nouveau_drm(dev);
Adam Jackson6225ee02012-05-14 16:05:49 -040044 u8 buf[3];
45
46 if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
47 return;
48
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100049 if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3))
Ben Skeggs77145f12012-07-31 16:16:21 +100050 NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
Adam Jackson6225ee02012-05-14 16:05:49 -040051 buf[0], buf[1], buf[2]);
52
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100053 if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3))
Ben Skeggs77145f12012-07-31 16:16:21 +100054 NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
Adam Jackson6225ee02012-05-14 16:05:49 -040055 buf[0], buf[1], buf[2]);
56
57}
58
Ben Skeggs8777c5c2014-06-06 18:09:55 +100059int
60nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
Ben Skeggs6ee73862009-12-11 19:24:15 +100061{
Ben Skeggs8777c5c2014-06-06 18:09:55 +100062 struct drm_device *dev = nv_encoder->base.base.dev;
Ben Skeggs77145f12012-07-31 16:16:21 +100063 struct nouveau_drm *drm = nouveau_drm(dev);
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100064 struct nvkm_i2c_aux *aux;
Ben Skeggsf20c6652016-11-04 17:20:36 +100065 u8 dpcd[8];
Ben Skeggs6ee73862009-12-11 19:24:15 +100066 int ret;
67
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100068 aux = nv_encoder->aux;
69 if (!aux)
Ben Skeggs8777c5c2014-06-06 18:09:55 +100070 return -ENODEV;
Ben Skeggs52e0d0e2011-08-04 14:31:28 +100071
Ben Skeggsf20c6652016-11-04 17:20:36 +100072 ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));
Ben Skeggs6ee73862009-12-11 19:24:15 +100073 if (ret)
Ben Skeggs8777c5c2014-06-06 18:09:55 +100074 return ret;
Ben Skeggs6ee73862009-12-11 19:24:15 +100075
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100076 nv_encoder->dp.link_bw = 27000 * dpcd[1];
Ben Skeggs85341f22010-09-28 10:03:57 +100077 nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
Ben Skeggs6ee73862009-12-11 19:24:15 +100078
Ben Skeggs77145f12012-07-31 16:16:21 +100079 NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100080 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
Ben Skeggs77145f12012-07-31 16:16:21 +100081 NV_DEBUG(drm, "encoder: %dx%d\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100082 nv_encoder->dcb->dpconf.link_nr,
83 nv_encoder->dcb->dpconf.link_bw);
84
85 if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
86 nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
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;
89
Ben Skeggs77145f12012-07-31 16:16:21 +100090 NV_DEBUG(drm, "maximum: %dx%d\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100091 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
Ben Skeggsfe224bb2010-09-27 08:29:33 +100092
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100093 nouveau_dp_probe_oui(dev, aux, dpcd);
Ben Skeggs52aa30f2016-11-04 17:20:36 +100094
Ben Skeggsf479c0b2016-11-04 17:20:36 +100095 ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst);
96 if (ret == 1)
97 return NOUVEAU_DP_MST;
Ben Skeggs52aa30f2016-11-04 17:20:36 +100098 if (ret == 0)
99 return NOUVEAU_DP_SST;
100 return ret;
Ben Skeggs6ee73862009-12-11 19:24:15 +1000101}