diff options
Diffstat (limited to 'nvkm/engine/disp/dport.c')
| -rw-r--r-- | nvkm/engine/disp/dport.c | 402 |
1 files changed, 0 insertions, 402 deletions
diff --git a/nvkm/engine/disp/dport.c b/nvkm/engine/disp/dport.c deleted file mode 100644 index 16db08dfb..000000000 --- a/nvkm/engine/disp/dport.c +++ /dev/null @@ -1,402 +0,0 @@ -/* - * Copyright 2013 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 <subdev/bios.h> -#include <subdev/bios/dcb.h> -#include <subdev/bios/dp.h> -#include <subdev/bios/init.h> -#include <subdev/i2c.h> - -#include "nv50.h" - -#include <nvif/class.h> - -#include "dport.h" -#include "outpdp.h" - -/****************************************************************************** - * link training - *****************************************************************************/ -struct dp_state { - struct nvkm_output_dp *outp; - int link_nr; - u32 link_bw; - u8 stat[6]; - u8 conf[4]; - bool pc2; - u8 pc2stat; - u8 pc2conf[2]; -}; - -static int -dp_set_link_config(struct dp_state *dp) -{ - struct nvkm_output_dp_impl *impl = (void *)nv_oclass(dp->outp); - struct nvkm_output_dp *outp = dp->outp; - struct nouveau_disp *disp = nouveau_disp(outp); - struct nouveau_bios *bios = nouveau_bios(disp); - struct nvbios_init init = { - .subdev = nv_subdev(disp), - .bios = bios, - .offset = 0x0000, - .outp = &outp->base.info, - .crtc = -1, - .execute = 1, - }; - u32 lnkcmp; - u8 sink[2]; - int ret; - - DBG("%d lanes at %d KB/s\n", dp->link_nr, dp->link_bw); - - /* set desired link configuration on the source */ - if ((lnkcmp = dp->outp->info.lnkcmp)) { - if (outp->version < 0x30) { - while ((dp->link_bw / 10) < nv_ro16(bios, lnkcmp)) - lnkcmp += 4; - init.offset = nv_ro16(bios, lnkcmp + 2); - } else { - while ((dp->link_bw / 27000) < nv_ro08(bios, lnkcmp)) - lnkcmp += 3; - init.offset = nv_ro16(bios, lnkcmp + 1); - } - - nvbios_exec(&init); - } - - ret = impl->lnk_ctl(outp, dp->link_nr, dp->link_bw / 27000, - outp->dpcd[DPCD_RC02] & - DPCD_RC02_ENHANCED_FRAME_CAP); - if (ret) { - if (ret < 0) - ERR("lnk_ctl failed with %d\n", ret); - return ret; - } - - impl->lnk_pwr(outp, dp->link_nr); - - /* set desired link configuration on the sink */ - sink[0] = dp->link_bw / 27000; - sink[1] = dp->link_nr; - if (outp->dpcd[DPCD_RC02] & DPCD_RC02_ENHANCED_FRAME_CAP) - sink[1] |= DPCD_LC01_ENHANCED_FRAME_EN; - - return nv_wraux(outp->base.edid, DPCD_LC00_LINK_BW_SET, sink, 2); -} - -static void -dp_set_training_pattern(struct dp_state *dp, u8 pattern) -{ - struct nvkm_output_dp_impl *impl = (void *)nv_oclass(dp->outp); - struct nvkm_output_dp *outp = dp->outp; - u8 sink_tp; - - DBG("training pattern %d\n", pattern); - impl->pattern(outp, pattern); - - nv_rdaux(outp->base.edid, DPCD_LC02, &sink_tp, 1); - sink_tp &= ~DPCD_LC02_TRAINING_PATTERN_SET; - sink_tp |= pattern; - nv_wraux(outp->base.edid, DPCD_LC02, &sink_tp, 1); -} - -static int -dp_link_train_commit(struct dp_state *dp, bool pc) -{ - struct nvkm_output_dp_impl *impl = (void *)nv_oclass(dp->outp); - struct nvkm_output_dp *outp = dp->outp; - int ret, i; - - for (i = 0; i < dp->link_nr; i++) { - u8 lane = (dp->stat[4 + (i >> 1)] >> ((i & 1) * 4)) & 0xf; - u8 lpc2 = (dp->pc2stat >> (i * 2)) & 0x3; - u8 lpre = (lane & 0x0c) >> 2; - u8 lvsw = (lane & 0x03) >> 0; - u8 hivs = 3 - lpre; - u8 hipe = 3; - u8 hipc = 3; - - if (lpc2 >= hipc) - lpc2 = hipc | DPCD_LC0F_LANE0_MAX_POST_CURSOR2_REACHED; - if (lpre >= hipe) { - lpre = hipe | DPCD_LC03_MAX_SWING_REACHED; /* yes. */ - lvsw = hivs = 3 - (lpre & 3); - } else - if (lvsw >= hivs) { - lvsw = hivs | DPCD_LC03_MAX_SWING_REACHED; - } - - dp->conf[i] = (lpre << 3) | lvsw; - dp->pc2conf[i >> 1] |= lpc2 << ((i & 1) * 4); - - DBG("config lane %d %02x %02x\n", i, dp->conf[i], lpc2); - impl->drv_ctl(outp, i, lvsw & 3, lpre & 3, lpc2 & 3); - } - - ret = nv_wraux(outp->base.edid, DPCD_LC03(0), dp->conf, 4); - if (ret) - return ret; - - if (pc) { - ret = nv_wraux(outp->base.edid, DPCD_LC0F, dp->pc2conf, 2); - if (ret) - return ret; - } - - return 0; -} - -static int -dp_link_train_update(struct dp_state *dp, bool pc, u32 delay) -{ - struct nvkm_output_dp *outp = dp->outp; - int ret; - - if (outp->dpcd[DPCD_RC0E_AUX_RD_INTERVAL]) - mdelay(outp->dpcd[DPCD_RC0E_AUX_RD_INTERVAL] * 4); - else - udelay(delay); - - ret = nv_rdaux(outp->base.edid, DPCD_LS02, dp->stat, 6); - if (ret) - return ret; - - if (pc) { - ret = nv_rdaux(outp->base.edid, DPCD_LS0C, &dp->pc2stat, 1); - if (ret) - dp->pc2stat = 0x00; - DBG("status %6ph pc2 %02x\n", dp->stat, dp->pc2stat); - } else { - DBG("status %6ph\n", dp->stat); - } - - return 0; -} - -static int -dp_link_train_cr(struct dp_state *dp) -{ - bool cr_done = false, abort = false; - int voltage = dp->conf[0] & DPCD_LC03_VOLTAGE_SWING_SET; - int tries = 0, i; - - dp_set_training_pattern(dp, 1); - - do { - if (dp_link_train_commit(dp, false) || - dp_link_train_update(dp, false, 100)) - break; - - cr_done = true; - for (i = 0; i < dp->link_nr; i++) { - u8 lane = (dp->stat[i >> 1] >> ((i & 1) * 4)) & 0xf; - if (!(lane & DPCD_LS02_LANE0_CR_DONE)) { - cr_done = false; - if (dp->conf[i] & DPCD_LC03_MAX_SWING_REACHED) - abort = true; - break; - } - } - - if ((dp->conf[0] & DPCD_LC03_VOLTAGE_SWING_SET) != voltage) { - voltage = dp->conf[0] & DPCD_LC03_VOLTAGE_SWING_SET; - tries = 0; - } - } while (!cr_done && !abort && ++tries < 5); - - return cr_done ? 0 : -1; -} - -static int -dp_link_train_eq(struct dp_state *dp) -{ - struct nvkm_output_dp *outp = dp->outp; - bool eq_done = false, cr_done = true; - int tries = 0, i; - - if (outp->dpcd[2] & DPCD_RC02_TPS3_SUPPORTED) - dp_set_training_pattern(dp, 3); - else - dp_set_training_pattern(dp, 2); - - do { - if ((tries && - dp_link_train_commit(dp, dp->pc2)) || - dp_link_train_update(dp, dp->pc2, 400)) - break; - - eq_done = !!(dp->stat[2] & DPCD_LS04_INTERLANE_ALIGN_DONE); - for (i = 0; i < dp->link_nr && eq_done; i++) { - u8 lane = (dp->stat[i >> 1] >> ((i & 1) * 4)) & 0xf; - if (!(lane & DPCD_LS02_LANE0_CR_DONE)) - cr_done = false; - if (!(lane & DPCD_LS02_LANE0_CHANNEL_EQ_DONE) || - !(lane & DPCD_LS02_LANE0_SYMBOL_LOCKED)) - eq_done = false; - } - } while (!eq_done && cr_done && ++tries <= 5); - - return eq_done ? 0 : -1; -} - -static void -dp_link_train_init(struct dp_state *dp, bool spread) -{ - struct nvkm_output_dp *outp = dp->outp; - struct nouveau_disp *disp = nouveau_disp(outp); - struct nouveau_bios *bios = nouveau_bios(disp); - struct nvbios_init init = { - .subdev = nv_subdev(disp), - .bios = bios, - .outp = &outp->base.info, - .crtc = -1, - .execute = 1, - }; - - /* set desired spread */ - if (spread) - init.offset = outp->info.script[2]; - else - init.offset = outp->info.script[3]; - nvbios_exec(&init); - - /* pre-train script */ - init.offset = outp->info.script[0]; - nvbios_exec(&init); -} - -static void -dp_link_train_fini(struct dp_state *dp) -{ - struct nvkm_output_dp *outp = dp->outp; - struct nouveau_disp *disp = nouveau_disp(outp); - struct nouveau_bios *bios = nouveau_bios(disp); - struct nvbios_init init = { - .subdev = nv_subdev(disp), - .bios = bios, - .outp = &outp->base.info, - .crtc = -1, - .execute = 1, - }; - - /* post-train script */ - init.offset = outp->info.script[1], - nvbios_exec(&init); -} - -static const struct dp_rates { - u32 rate; - u8 bw; - u8 nr; -} nouveau_dp_rates[] = { - { 2160000, 0x14, 4 }, - { 1080000, 0x0a, 4 }, - { 1080000, 0x14, 2 }, - { 648000, 0x06, 4 }, - { 540000, 0x0a, 2 }, - { 540000, 0x14, 1 }, - { 324000, 0x06, 2 }, - { 270000, 0x0a, 1 }, - { 162000, 0x06, 1 }, - {} -}; - -void -nouveau_dp_train(struct work_struct *w) -{ - struct nvkm_output_dp *outp = container_of(w, typeof(*outp), lt.work); - struct nv50_disp_priv *priv = (void *)nouveau_disp(outp); - const struct dp_rates *cfg = nouveau_dp_rates; - struct dp_state _dp = { - .outp = outp, - }, *dp = &_dp; - u32 datarate = 0; - int ret; - - if (!outp->base.info.location && priv->sor.magic) - priv->sor.magic(&outp->base); - - /* bring capabilities within encoder limits */ - if (nv_mclass(priv) < GF110_DISP) - outp->dpcd[2] &= ~DPCD_RC02_TPS3_SUPPORTED; - if ((outp->dpcd[2] & 0x1f) > outp->base.info.dpconf.link_nr) { - outp->dpcd[2] &= ~DPCD_RC02_MAX_LANE_COUNT; - outp->dpcd[2] |= outp->base.info.dpconf.link_nr; - } - if (outp->dpcd[1] > outp->base.info.dpconf.link_bw) - outp->dpcd[1] = outp->base.info.dpconf.link_bw; - dp->pc2 = outp->dpcd[2] & DPCD_RC02_TPS3_SUPPORTED; - - /* restrict link config to the lowest required rate, if requested */ - if (datarate) { - datarate = (datarate / 8) * 10; /* 8B/10B coding overhead */ - while (cfg[1].rate >= datarate) - cfg++; - } - cfg--; - - /* disable link interrupt handling during link training */ - nvkm_notify_put(&outp->irq); - - /* enable down-spreading and execute pre-train script from vbios */ - dp_link_train_init(dp, outp->dpcd[3] & 0x01); - - while (ret = -EIO, (++cfg)->rate) { - /* select next configuration supported by encoder and sink */ - while (cfg->nr > (outp->dpcd[2] & DPCD_RC02_MAX_LANE_COUNT) || - cfg->bw > (outp->dpcd[DPCD_RC01_MAX_LINK_RATE])) - cfg++; - dp->link_bw = cfg->bw * 27000; - dp->link_nr = cfg->nr; - - /* program selected link configuration */ - ret = dp_set_link_config(dp); - if (ret == 0) { - /* attempt to train the link at this configuration */ - memset(dp->stat, 0x00, sizeof(dp->stat)); - if (!dp_link_train_cr(dp) && - !dp_link_train_eq(dp)) - break; - } else - if (ret) { - /* dp_set_link_config() handled training, or - * we failed to communicate with the sink. - */ - break; - } - } - - /* finish link training and execute post-train script from vbios */ - dp_set_training_pattern(dp, 0); - if (ret < 0) - ERR("link training failed\n"); - - dp_link_train_fini(dp); - - /* signal completion and enable link interrupt handling */ - DBG("training complete\n"); - atomic_set(&outp->lt.done, 1); - wake_up(&outp->lt.wait); - nvkm_notify_get(&outp->irq); -} |