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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 Skeggs77145f12012-07-31 16:16:21 +100028#include "nouveau_drm.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
Adam Jackson6225ee02012-05-14 16:05:49 -040033static void
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100034nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
Adam Jackson6225ee02012-05-14 16:05:49 -040035{
Ben Skeggs77145f12012-07-31 16:16:21 +100036 struct nouveau_drm *drm = nouveau_drm(dev);
Adam Jackson6225ee02012-05-14 16:05:49 -040037 u8 buf[3];
38
39 if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
40 return;
41
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100042 if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3))
Ben Skeggs77145f12012-07-31 16:16:21 +100043 NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
Adam Jackson6225ee02012-05-14 16:05:49 -040044 buf[0], buf[1], buf[2]);
45
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100046 if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3))
Ben Skeggs77145f12012-07-31 16:16:21 +100047 NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
Adam Jackson6225ee02012-05-14 16:05:49 -040048 buf[0], buf[1], buf[2]);
49
50}
51
Ben Skeggs8777c5c2014-06-06 18:09:55 +100052int
53nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
Ben Skeggs6ee73862009-12-11 19:24:15 +100054{
Ben Skeggs8777c5c2014-06-06 18:09:55 +100055 struct drm_device *dev = nv_encoder->base.base.dev;
Ben Skeggs77145f12012-07-31 16:16:21 +100056 struct nouveau_drm *drm = nouveau_drm(dev);
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100057 struct nvkm_i2c_aux *aux;
Ben Skeggs52e0d0e2011-08-04 14:31:28 +100058 u8 *dpcd = nv_encoder->dp.dpcd;
Ben Skeggs6ee73862009-12-11 19:24:15 +100059 int ret;
60
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100061 aux = nv_encoder->aux;
62 if (!aux)
Ben Skeggs8777c5c2014-06-06 18:09:55 +100063 return -ENODEV;
Ben Skeggs52e0d0e2011-08-04 14:31:28 +100064
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100065 ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, 8);
Ben Skeggs6ee73862009-12-11 19:24:15 +100066 if (ret)
Ben Skeggs8777c5c2014-06-06 18:09:55 +100067 return ret;
Ben Skeggs6ee73862009-12-11 19:24:15 +100068
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100069 nv_encoder->dp.link_bw = 27000 * dpcd[1];
Ben Skeggs85341f22010-09-28 10:03:57 +100070 nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
Ben Skeggs6ee73862009-12-11 19:24:15 +100071
Ben Skeggs77145f12012-07-31 16:16:21 +100072 NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100073 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
Ben Skeggs77145f12012-07-31 16:16:21 +100074 NV_DEBUG(drm, "encoder: %dx%d\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100075 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
Ben Skeggs77145f12012-07-31 16:16:21 +100083 NV_DEBUG(drm, "maximum: %dx%d\n",
Ben Skeggs75a1fcc2011-08-04 09:55:44 +100084 nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
Ben Skeggsfe224bb2010-09-27 08:29:33 +100085
Ben Skeggs2aa5eac2015-08-20 14:54:15 +100086 nouveau_dp_probe_oui(dev, aux, dpcd);
Ben Skeggs8777c5c2014-06-06 18:09:55 +100087 return 0;
Ben Skeggs6ee73862009-12-11 19:24:15 +100088}