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/*
* 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 <subdev/i2c.h>
#include "outpdp.h"
#include "conn.h"
#include "dport.h"
static void
nvkm_output_dp_enable(struct nvkm_output_dp *outp, bool present)
{
struct nouveau_i2c_port *port = outp->base.edid;
if (present) {
if (!outp->present) {
nouveau_i2c(port)->acquire_pad(port, 0);
DBG("aux power -> always\n");
outp->present = true;
}
} else {
if (outp->present) {
nouveau_i2c(port)->release_pad(port);
DBG("aux power -> demand\n");
outp->present = false;
}
}
}
static void
nvkm_output_dp_detect(struct nvkm_output_dp *outp)
{
struct nouveau_i2c_port *port = outp->base.edid;
int ret = nouveau_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);
nouveau_i2c(port)->release_pad(port);
}
}
static void
nvkm_output_dp_service_work(struct work_struct *work)
{
struct nvkm_output_dp *outp = container_of(work, typeof(*outp), work);
struct nouveau_disp *disp = nouveau_disp(outp);
int type = atomic_xchg(&outp->pending, 0);
u32 send = 0;
if (type & (NVKM_I2C_PLUG | NVKM_I2C_UNPLUG)) {
nvkm_output_dp_detect(outp);
if (type & NVKM_I2C_UNPLUG)
send |= NVKM_HPD_UNPLUG;
if (type & NVKM_I2C_PLUG)
send |= NVKM_HPD_PLUG;
nouveau_event_get(outp->base.conn->hpd.event);
}
if (type & NVKM_I2C_IRQ) {
nouveau_event_get(outp->irq);
send |= NVKM_HPD_IRQ;
}
nouveau_event_trigger(disp->hpd, send, outp->base.info.connector);
}
static int
nvkm_output_dp_service(void *data, u32 type, int index)
{
struct nvkm_output_dp *outp = data;
DBG("HPD: %d\n", type);
atomic_or(type, &outp->pending);
schedule_work(&outp->work);
return NVKM_EVENT_DROP;
}
int
_nvkm_output_dp_fini(struct nouveau_object *object, bool suspend)
{
struct nvkm_output_dp *outp = (void *)object;
nouveau_event_put(outp->irq);
nvkm_output_dp_enable(outp, false);
return nvkm_output_fini(&outp->base, suspend);
}
int
_nvkm_output_dp_init(struct nouveau_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 nouveau_object *object)
{
struct nvkm_output_dp *outp = (void *)object;
nouveau_event_ref(NULL, &outp->irq);
nvkm_output_destroy(&outp->base);
}
int
nvkm_output_dp_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass,
struct dcb_output *info, int index,
int length, void **pobject)
{
struct nouveau_bios *bios = nouveau_bios(parent);
struct nouveau_i2c *i2c = nouveau_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;
nouveau_event_ref(NULL, &outp->base.conn->hpd.event);
/* 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 maintenance */
ret = nouveau_event_new(i2c->ntfy, NVKM_I2C_IRQ, outp->base.edid->index,
nvkm_output_dp_service, outp, &outp->irq);
if (ret) {
ERR("error monitoring aux irq event: %d\n", ret);
return ret;
}
INIT_WORK(&outp->work, nvkm_output_dp_service_work);
/* hotplug detect, replaces gpio-based mechanism with aux events */
ret = nouveau_event_new(i2c->ntfy, NVKM_I2C_PLUG | NVKM_I2C_UNPLUG,
outp->base.edid->index,
nvkm_output_dp_service, outp,
&outp->base.conn->hpd.event);
if (ret) {
ERR("error monitoring aux hpd events: %d\n", ret);
return ret;
}
return 0;
}
int
_nvkm_output_dp_ctor(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass, void *info, u32 index,
struct nouveau_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;
}
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