From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../gpu/drm/nouveau/nvkm/engine/disp/outpdp.c | 301 +++++++++++++++++++++ 1 file changed, 301 insertions(+) create mode 100644 kernel/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c') diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c b/kernel/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c new file mode 100644 index 000000000..0bde0fa5b --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c @@ -0,0 +1,301 @@ +/* + * Copyright 2014 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 "outpdp.h" +#include "conn.h" +#include "dport.h" +#include "priv.h" + +#include + +#include + +int +nvkm_output_dp_train(struct nvkm_output *base, u32 datarate, bool wait) +{ + struct nvkm_output_dp *outp = (void *)base; + bool retrain = true; + u8 link[2], stat[3]; + u32 linkrate; + int ret, i; + + /* check that the link is trained at a high enough rate */ + ret = nv_rdaux(outp->base.edid, DPCD_LC00_LINK_BW_SET, link, 2); + if (ret) { + DBG("failed to read link config, assuming no sink\n"); + goto done; + } + + linkrate = link[0] * 27000 * (link[1] & DPCD_LC01_LANE_COUNT_SET); + linkrate = (linkrate * 8) / 10; /* 8B/10B coding overhead */ + datarate = (datarate + 9) / 10; /* -> decakilobits */ + if (linkrate < datarate) { + DBG("link not trained at sufficient rate\n"); + goto done; + } + + /* check that link is still trained */ + ret = nv_rdaux(outp->base.edid, DPCD_LS02, stat, 3); + if (ret) { + DBG("failed to read link status, assuming no sink\n"); + goto done; + } + + if (stat[2] & DPCD_LS04_INTERLANE_ALIGN_DONE) { + for (i = 0; i < (link[1] & DPCD_LC01_LANE_COUNT_SET); i++) { + u8 lane = (stat[i >> 1] >> ((i & 1) * 4)) & 0x0f; + if (!(lane & DPCD_LS02_LANE0_CR_DONE) || + !(lane & DPCD_LS02_LANE0_CHANNEL_EQ_DONE) || + !(lane & DPCD_LS02_LANE0_SYMBOL_LOCKED)) { + DBG("lane %d not equalised\n", lane); + goto done; + } + } + retrain = false; + } else { + DBG("no inter-lane alignment\n"); + } + +done: + if (retrain || !atomic_read(&outp->lt.done)) { + /* no sink, but still need to configure source */ + if (outp->dpcd[DPCD_RC00_DPCD_REV] == 0x00) { + outp->dpcd[DPCD_RC01_MAX_LINK_RATE] = + outp->base.info.dpconf.link_bw; + outp->dpcd[DPCD_RC02] = + outp->base.info.dpconf.link_nr; + } + atomic_set(&outp->lt.done, 0); + schedule_work(&outp->lt.work); + } else { + nvkm_notify_get(&outp->irq); + } + + if (wait) { + if (!wait_event_timeout(outp->lt.wait, + atomic_read(&outp->lt.done), + msecs_to_jiffies(2000))) + ret = -ETIMEDOUT; + } + + return ret; +} + +static void +nvkm_output_dp_enable(struct nvkm_output_dp *outp, bool present) +{ + struct nvkm_i2c_port *port = outp->base.edid; + if (present) { + if (!outp->present) { + nvkm_i2c(port)->acquire_pad(port, 0); + DBG("aux power -> always\n"); + outp->present = true; + } + nvkm_output_dp_train(&outp->base, 0, true); + } else { + if (outp->present) { + nvkm_i2c(port)->release_pad(port); + DBG("aux power -> demand\n"); + outp->present = false; + } + atomic_set(&outp->lt.done, 0); + } +} + +static void +nvkm_output_dp_detect(struct nvkm_output_dp *outp) +{ + struct nvkm_i2c_port *port = outp->base.edid; + int ret = nvkm_i2c(port)->acquire_pad(port, 0); + if (ret == 0) { + ret = nv_rdaux(outp->base.edid, DPCD_RC00_DPCD_REV, + outp->dpcd, sizeof(outp->dpcd)); + nvkm_output_dp_enable(outp, ret == 0); + nvkm_i2c(port)->release_pad(port); + } +} + +static int +nvkm_output_dp_hpd(struct nvkm_notify *notify) +{ + struct nvkm_connector *conn = container_of(notify, typeof(*conn), hpd); + struct nvkm_output_dp *outp; + struct nvkm_disp *disp = nvkm_disp(conn); + const struct nvkm_i2c_ntfy_rep *line = notify->data; + struct nvif_notify_conn_rep_v0 rep = {}; + + list_for_each_entry(outp, &disp->outp, base.head) { + if (outp->base.conn == conn && + outp->info.type == DCB_OUTPUT_DP) { + DBG("HPD: %d\n", line->mask); + nvkm_output_dp_detect(outp); + + if (line->mask & NVKM_I2C_UNPLUG) + rep.mask |= NVIF_NOTIFY_CONN_V0_UNPLUG; + if (line->mask & NVKM_I2C_PLUG) + rep.mask |= NVIF_NOTIFY_CONN_V0_PLUG; + + nvkm_event_send(&disp->hpd, rep.mask, conn->index, + &rep, sizeof(rep)); + return NVKM_NOTIFY_KEEP; + } + } + + WARN_ON(1); + return NVKM_NOTIFY_DROP; +} + +static int +nvkm_output_dp_irq(struct nvkm_notify *notify) +{ + struct nvkm_output_dp *outp = container_of(notify, typeof(*outp), irq); + struct nvkm_disp *disp = nvkm_disp(outp); + const struct nvkm_i2c_ntfy_rep *line = notify->data; + struct nvif_notify_conn_rep_v0 rep = { + .mask = NVIF_NOTIFY_CONN_V0_IRQ, + }; + int index = outp->base.info.connector; + + DBG("IRQ: %d\n", line->mask); + nvkm_output_dp_train(&outp->base, 0, true); + + nvkm_event_send(&disp->hpd, rep.mask, index, &rep, sizeof(rep)); + return NVKM_NOTIFY_DROP; +} + +int +_nvkm_output_dp_fini(struct nvkm_object *object, bool suspend) +{ + struct nvkm_output_dp *outp = (void *)object; + nvkm_notify_put(&outp->irq); + nvkm_output_dp_enable(outp, false); + return nvkm_output_fini(&outp->base, suspend); +} + +int +_nvkm_output_dp_init(struct nvkm_object *object) +{ + struct nvkm_output_dp *outp = (void *)object; + nvkm_output_dp_detect(outp); + return nvkm_output_init(&outp->base); +} + +void +_nvkm_output_dp_dtor(struct nvkm_object *object) +{ + struct nvkm_output_dp *outp = (void *)object; + nvkm_notify_fini(&outp->irq); + nvkm_output_destroy(&outp->base); +} + +int +nvkm_output_dp_create_(struct nvkm_object *parent, + struct nvkm_object *engine, + struct nvkm_oclass *oclass, + struct dcb_output *info, int index, + int length, void **pobject) +{ + struct nvkm_bios *bios = nvkm_bios(parent); + struct nvkm_i2c *i2c = nvkm_i2c(parent); + struct nvkm_output_dp *outp; + u8 hdr, cnt, len; + u32 data; + int ret; + + ret = nvkm_output_create_(parent, engine, oclass, info, index, + length, pobject); + outp = *pobject; + if (ret) + return ret; + + nvkm_notify_fini(&outp->base.conn->hpd); + + /* access to the aux channel is not optional... */ + if (!outp->base.edid) { + ERR("aux channel not found\n"); + return -ENODEV; + } + + /* nor is the bios data for this output... */ + data = nvbios_dpout_match(bios, outp->base.info.hasht, + outp->base.info.hashm, &outp->version, + &hdr, &cnt, &len, &outp->info); + if (!data) { + ERR("no bios dp data\n"); + return -ENODEV; + } + + DBG("bios dp %02x %02x %02x %02x\n", outp->version, hdr, cnt, len); + + /* link training */ + INIT_WORK(&outp->lt.work, nvkm_dp_train); + init_waitqueue_head(&outp->lt.wait); + atomic_set(&outp->lt.done, 0); + + /* link maintenance */ + ret = nvkm_notify_init(NULL, &i2c->event, nvkm_output_dp_irq, true, + &(struct nvkm_i2c_ntfy_req) { + .mask = NVKM_I2C_IRQ, + .port = outp->base.edid->index, + }, + sizeof(struct nvkm_i2c_ntfy_req), + sizeof(struct nvkm_i2c_ntfy_rep), + &outp->irq); + if (ret) { + ERR("error monitoring aux irq event: %d\n", ret); + return ret; + } + + /* hotplug detect, replaces gpio-based mechanism with aux events */ + ret = nvkm_notify_init(NULL, &i2c->event, nvkm_output_dp_hpd, true, + &(struct nvkm_i2c_ntfy_req) { + .mask = NVKM_I2C_PLUG | NVKM_I2C_UNPLUG, + .port = outp->base.edid->index, + }, + sizeof(struct nvkm_i2c_ntfy_req), + sizeof(struct nvkm_i2c_ntfy_rep), + &outp->base.conn->hpd); + if (ret) { + ERR("error monitoring aux hpd events: %d\n", ret); + return ret; + } + + return 0; +} + +int +_nvkm_output_dp_ctor(struct nvkm_object *parent, + struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *info, u32 index, + struct nvkm_object **pobject) +{ + struct nvkm_output_dp *outp; + int ret; + + ret = nvkm_output_dp_create(parent, engine, oclass, info, index, &outp); + *pobject = nv_object(outp); + if (ret) + return ret; + + return 0; +} -- cgit 1.2.3-korg