Release 4.11 drivers/gpu/drm/nouveau/nouveau_dp.c
/*
* Copyright 2009 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include <drm/drmP.h>
#include <drm/drm_dp_helper.h>
#include "nouveau_drv.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"
#include <nvif/class.h>
#include <nvif/cl5070.h>
MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
static int nouveau_mst = 1;
module_param_named(mst, nouveau_mst, int, 0400);
static void
nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, u8 *dpcd)
{
struct nouveau_drm *drm = nouveau_drm(dev);
u8 buf[3];
if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
return;
if (!nvkm_rdaux(aux, DP_SINK_OUI, buf, 3))
NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
buf[0], buf[1], buf[2]);
if (!nvkm_rdaux(aux, DP_BRANCH_OUI, buf, 3))
NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
buf[0], buf[1], buf[2]);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Adam Jackson | 101 | 83.47% | 1 | 33.33% |
| Ben Skeggs | 20 | 16.53% | 2 | 66.67% |
| Total | 121 | 100.00% | 3 | 100.00% |
int
nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
{
struct drm_device *dev = nv_encoder->base.base.dev;
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvkm_i2c_aux *aux;
u8 dpcd[8];
int ret;
aux = nv_encoder->aux;
if (!aux)
return -ENODEV;
ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));
if (ret)
return ret;
nv_encoder->dp.link_bw = 27000 * dpcd[1];
nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
NV_DEBUG(drm, "encoder: %dx%d\n",
nv_encoder->dcb->dpconf.link_nr,
nv_encoder->dcb->dpconf.link_bw);
if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
NV_DEBUG(drm, "maximum: %dx%d\n",
nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
nouveau_dp_probe_oui(dev, aux, dpcd);
ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst);
if (ret == 1)
return NOUVEAU_DP_MST;
if (ret == 0)
return NOUVEAU_DP_SST;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ben Skeggs | 274 | 97.16% | 11 | 91.67% |
| Adam Jackson | 8 | 2.84% | 1 | 8.33% |
| Total | 282 | 100.00% | 12 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ben Skeggs | 341 | 75.44% | 14 | 82.35% |
| Adam Jackson | 109 | 24.12% | 1 | 5.88% |
| David Howells | 1 | 0.22% | 1 | 5.88% |
| Linus Torvalds | 1 | 0.22% | 1 | 5.88% |
| Total | 452 | 100.00% | 17 | 100.00% |
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