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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 "outp.h"
#include "ior.h"
#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/i2c.h>
void
nvkm_outp_route(struct nvkm_disp *disp)
{
struct nvkm_outp *outp;
struct nvkm_ior *ior;
list_for_each_entry(ior, &disp->ior, head) {
if ((outp = ior->arm.outp) && ior->arm.outp != ior->asy.outp) {
OUTP_DBG(outp, "release %s", ior->name);
if (ior->func->route.set)
ior->func->route.set(outp, NULL);
ior->arm.outp = NULL;
}
}
list_for_each_entry(ior, &disp->ior, head) {
if ((outp = ior->asy.outp)) {
OUTP_DBG(outp, "acquire %s", ior->name);
if (ior->asy.outp != ior->arm.outp) {
if (ior->func->route.set)
ior->func->route.set(outp, ior);
ior->arm.outp = ior->asy.outp;
}
}
}
}
static enum nvkm_ior_proto
nvkm_outp_xlat(struct nvkm_outp *outp, enum nvkm_ior_type *type)
{
switch (outp->info.location) {
case 0:
switch (outp->info.type) {
case DCB_OUTPUT_ANALOG: *type = DAC; return CRT;
case DCB_OUTPUT_TV : *type = DAC; return TV;
case DCB_OUTPUT_TMDS : *type = SOR; return TMDS;
case DCB_OUTPUT_LVDS : *type = SOR; return LVDS;
case DCB_OUTPUT_DP : *type = SOR; return DP;
default:
break;
}
break;
case 1:
switch (outp->info.type) {
case DCB_OUTPUT_TMDS: *type = PIOR; return TMDS;
case DCB_OUTPUT_DP : *type = PIOR; return TMDS; /* not a bug */
default:
break;
}
break;
default:
break;
}
WARN_ON(1);
return UNKNOWN;
}
void
nvkm_outp_release(struct nvkm_outp *outp, u8 user)
{
struct nvkm_ior *ior = outp->ior;
OUTP_TRACE(outp, "release %02x &= %02x %p", outp->acquired, ~user, ior);
if (ior) {
outp->acquired &= ~user;
if (!outp->acquired) {
if (outp->func->release && outp->ior)
outp->func->release(outp);
outp->ior->asy.outp = NULL;
outp->ior = NULL;
}
}
}
static inline int
nvkm_outp_acquire_ior(struct nvkm_outp *outp, u8 user, struct nvkm_ior *ior)
{
outp->ior = ior;
outp->ior->asy.outp = outp;
outp->ior->asy.link = outp->info.sorconf.link;
outp->acquired |= user;
return 0;
}
int
nvkm_outp_acquire(struct nvkm_outp *outp, u8 user)
{
struct nvkm_ior *ior = outp->ior;
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
OUTP_TRACE(outp, "acquire %02x |= %02x %p", outp->acquired, user, ior);
if (ior) {
outp->acquired |= user;
return 0;
}
/* Lookup a compatible, and unused, OR to assign to the device. */
proto = nvkm_outp_xlat(outp, &type);
if (proto == UNKNOWN)
return -ENOSYS;
/* First preference is to reuse the OR that is currently armed
* on HW, if any, in order to prevent unnecessary switching.
*/
list_for_each_entry(ior, &outp->disp->ior, head) {
if (!ior->asy.outp && ior->arm.outp == outp)
return nvkm_outp_acquire_ior(outp, user, ior);
}
/* Failing that, a completely unused OR is the next best thing. */
list_for_each_entry(ior, &outp->disp->ior, head) {
if (!ior->asy.outp && ior->type == type && !ior->arm.outp &&
(ior->func->route.set || ior->id == __ffs(outp->info.or)))
return nvkm_outp_acquire_ior(outp, user, ior);
}
/* Last resort is to assign an OR that's already active on HW,
* but will be released during the next modeset.
*/
list_for_each_entry(ior, &outp->disp->ior, head) {
if (!ior->asy.outp && ior->type == type &&
(ior->func->route.set || ior->id == __ffs(outp->info.or)))
return nvkm_outp_acquire_ior(outp, user, ior);
}
return -ENOSPC;
}
void
nvkm_outp_fini(struct nvkm_outp *outp)
{
if (outp->func->fini)
outp->func->fini(outp);
}
static void
nvkm_outp_init_route(struct nvkm_outp *outp)
{
struct nvkm_disp *disp = outp->disp;
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
struct nvkm_ior *ior;
int id, link;
/* Find any OR from the class that is able to support this device. */
proto = nvkm_outp_xlat(outp, &type);
if (proto == UNKNOWN)
return;
ior = nvkm_ior_find(disp, type, -1);
if (!ior) {
WARN_ON(1);
return;
}
/* Determine the specific OR, if any, this device is attached to. */
if (ior->func->route.get) {
id = ior->func->route.get(outp, &link);
if (id < 0) {
OUTP_DBG(outp, "no route");
return;
}
} else {
/* Prior to DCB 4.1, this is hardwired like so. */
id = ffs(outp->info.or) - 1;
link = (ior->type == SOR) ? outp->info.sorconf.link : 0;
}
ior = nvkm_ior_find(disp, type, id);
if (!ior) {
WARN_ON(1);
return;
}
/* Determine if the OR is already configured for this device. */
ior->func->state(ior, &ior->arm);
if (!ior->arm.head || ior->arm.proto != proto) {
OUTP_DBG(outp, "no heads (%x %d %d)", ior->arm.head,
ior->arm.proto, proto);
return;
}
OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link);
ior->arm.outp = outp;
}
void
nvkm_outp_init(struct nvkm_outp *outp)
{
nvkm_outp_init_route(outp);
if (outp->func->init)
outp->func->init(outp);
}
void
nvkm_outp_del(struct nvkm_outp **poutp)
{
struct nvkm_outp *outp = *poutp;
if (outp && !WARN_ON(!outp->func)) {
if (outp->func->dtor)
*poutp = outp->func->dtor(outp);
kfree(*poutp);
*poutp = NULL;
}
}
int
nvkm_outp_ctor(const struct nvkm_outp_func *func, struct nvkm_disp *disp,
int index, struct dcb_output *dcbE, struct nvkm_outp *outp)
{
struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c;
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
outp->func = func;
outp->disp = disp;
outp->index = index;
outp->info = *dcbE;
outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index);
outp->or = ffs(outp->info.or) - 1;
OUTP_DBG(outp, "type %02x loc %d or %d link %d con %x "
"edid %x bus %d head %x",
outp->info.type, outp->info.location, outp->info.or,
outp->info.type >= 2 ? outp->info.sorconf.link : 0,
outp->info.connector, outp->info.i2c_index,
outp->info.bus, outp->info.heads);
/* Cull output paths we can't map to an output resource. */
proto = nvkm_outp_xlat(outp, &type);
if (proto == UNKNOWN)
return -ENODEV;
return 0;
}
static const struct nvkm_outp_func
nvkm_outp = {
};
int
nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE,
struct nvkm_outp **poutp)
{
if (!(*poutp = kzalloc(sizeof(**poutp), GFP_KERNEL)))
return -ENOMEM;
return nvkm_outp_ctor(&nvkm_outp, disp, index, dcbE, *poutp);
}
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