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/*
* 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_drm.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"
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]);
}
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 = nv_encoder->dp.dpcd;
int ret;
aux = nv_encoder->aux;
if (!aux)
return -ENODEV;
ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, 8);
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);
return 0;
}
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