d6a9efece7
Currently, the nv50_mstc_mode_valid() function is happy to take any and all modes, even the ones we can't actually support sometimes like interlaced modes. Luckily, the only difference between the mode validation that needs to be performed for MST vs. SST is that eventually we'll need to check the minimum PBN against the MSTB's full PBN capabilities (remember-we don't care about the current bw state here). Otherwise, all of the other code can be shared. So, we move all of the common mode validation in nouveau_connector_mode_valid() into a separate helper, nv50_dp_mode_valid(), and use that from both nv50_mstc_mode_valid() and nouveau_connector_mode_valid(). Note that we allow for returning the calculated clock that nv50_dp_mode_valid() came up with, since we'll eventually want to use that for PBN calculation in nv50_mstc_mode_valid(). Signed-off-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
132 lines
4 KiB
C
132 lines
4 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/drm_dp_helper.h>
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#include "nouveau_drv.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 <nvif/class.h>
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#include <nvif/cl5070.h>
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MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
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static int nouveau_mst = 1;
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module_param_named(mst, nouveau_mst, int, 0400);
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static void
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nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_aux *aux, 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 (!nvkm_rdaux(aux, 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 (!nvkm_rdaux(aux, 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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int
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nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
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{
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struct drm_device *dev = nv_encoder->base.base.dev;
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct nvkm_i2c_aux *aux;
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u8 dpcd[8];
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int ret;
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aux = nv_encoder->aux;
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if (!aux)
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return -ENODEV;
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ret = nvkm_rdaux(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));
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if (ret)
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return ret;
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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, aux, dpcd);
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ret = nv50_mstm_detect(nv_encoder->dp.mstm, dpcd, nouveau_mst);
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if (ret == 1)
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return NOUVEAU_DP_MST;
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if (ret == 0)
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return NOUVEAU_DP_SST;
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return ret;
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}
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/* TODO:
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* - Use the minimum possible BPC here, once we add support for the max bpc
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* property.
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* - Validate the mode against downstream port caps (see
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* drm_dp_downstream_max_clock())
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* - Validate against the DP caps advertised by the GPU (we don't check these
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* yet)
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*/
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enum drm_mode_status
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nv50_dp_mode_valid(struct drm_connector *connector,
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struct nouveau_encoder *outp,
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const struct drm_display_mode *mode,
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unsigned *out_clock)
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{
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const unsigned min_clock = 25000;
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unsigned max_clock, clock;
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enum drm_mode_status ret;
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if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace)
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return MODE_NO_INTERLACE;
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max_clock = outp->dp.link_nr * outp->dp.link_bw;
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clock = mode->clock * (connector->display_info.bpc * 3) / 10;
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ret = nouveau_conn_mode_clock_valid(mode, min_clock, max_clock,
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&clock);
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if (out_clock)
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*out_clock = clock;
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return ret;
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}
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