0a0afd282f
We need to be able to do link training for PIOR-connected ANX9805 from the third supervisor handler (due to script ordering in the bios, can't have the "user" call train because some settings are overwritten from the modesetting bios scripts). This moves link training for SOR-connected DP encoders to the second supervisor interrupt, *before* we call the modesetting scripts (yes, different ordering from PIOR is necessary). This is useful since we should now be able to remove some hacks to workaround races between the supervisor and link training paths. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/*
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* Copyright 2009 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include <drm/drmP.h>
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#include <drm/drm_dp_helper.h>
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#include "nouveau_drm.h"
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#include "nouveau_connector.h"
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#include "nouveau_encoder.h"
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#include "nouveau_crtc.h"
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#include <core/class.h>
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#include <subdev/gpio.h>
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#include <subdev/i2c.h>
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static void
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nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch,
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u8 *dpcd)
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{
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struct nouveau_drm *drm = nouveau_drm(dev);
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u8 buf[3];
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if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
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return;
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if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3))
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NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
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buf[0], buf[1], buf[2]);
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if (!nv_rdaux(auxch, DP_BRANCH_OUI, buf, 3))
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NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
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buf[0], buf[1], buf[2]);
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}
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bool
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nouveau_dp_detect(struct drm_encoder *encoder)
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{
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struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
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struct drm_device *dev = encoder->dev;
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct nouveau_i2c_port *auxch;
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u8 *dpcd = nv_encoder->dp.dpcd;
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int ret;
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auxch = nv_encoder->i2c;
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if (!auxch)
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return false;
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ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8);
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if (ret)
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return false;
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nv_encoder->dp.link_bw = 27000 * dpcd[1];
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nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
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NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
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nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
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NV_DEBUG(drm, "encoder: %dx%d\n",
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nv_encoder->dcb->dpconf.link_nr,
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nv_encoder->dcb->dpconf.link_bw);
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if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
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nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
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if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
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nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
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NV_DEBUG(drm, "maximum: %dx%d\n",
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nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
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nouveau_dp_probe_oui(dev, auxch, dpcd);
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return true;
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}
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