mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-27 04:54:41 +08:00
90 lines
2.8 KiB
C
90 lines
2.8 KiB
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_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 nouveau_i2c_port *auxch,
|
|
u8 *dpcd)
|
|
{
|
|
struct nouveau_drm *drm = nouveau_drm(dev);
|
|
u8 buf[3];
|
|
|
|
if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
|
|
return;
|
|
|
|
if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3))
|
|
NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
|
|
buf[0], buf[1], buf[2]);
|
|
|
|
if (!nv_rdaux(auxch, 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 nouveau_i2c_port *auxch;
|
|
u8 *dpcd = nv_encoder->dp.dpcd;
|
|
int ret;
|
|
|
|
auxch = nv_encoder->i2c;
|
|
if (!auxch)
|
|
return -ENODEV;
|
|
|
|
ret = nv_rdaux(auxch, 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, auxch, dpcd);
|
|
return 0;
|
|
}
|