/*
* 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 "conn.h"
#include "dp.h"
#include "ior.h"
#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/gpio.h>
#include <subdev/i2c.h>
static void
nvkm_outp_route(struct nvkm_disp *disp)
{
struct nvkm_outp *outp;
struct nvkm_ior *ior;
list_for_each_entry(ior, &disp->iors, 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->iors, head) {
if ((outp = ior->asy.outp)) {
if (ior->asy.outp != ior->arm.outp) {
OUTP_DBG(outp, "acquire %s", ior->name);
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_or(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) {
outp->ior->asy.outp = NULL;
outp->ior = NULL;
}
}
}
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;
}
static inline int
nvkm_outp_acquire_hda(struct nvkm_outp *outp, enum nvkm_ior_type type,
u8 user, bool hda)
{
struct nvkm_ior *ior;
/* Failing that, a completely unused OR is the next best thing. */
list_for_each_entry(ior, &outp->disp->iors, head) {
if (!ior->identity && ior->hda == hda &&
!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->iors, head) {
if (!ior->identity && ior->hda == hda &&
!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;
}
int
nvkm_outp_acquire_or(struct nvkm_outp *outp, u8 user, bool hda)
{
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;
/* Deal with panels requiring identity-mapped SOR assignment. */
if (outp->identity) {
ior = nvkm_ior_find(outp->disp, SOR, ffs(outp->info.or) - 1);
if (WARN_ON(!ior))
return -ENOSPC;
return nvkm_outp_acquire_ior(outp, user, ior);
}
/* 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->iors, head) {
if (!ior->identity && !ior->asy.outp && ior->arm.outp == outp) {
/*XXX: For various complicated reasons, we can't outright switch
* the boot-time OR on the first modeset without some fairly
* invasive changes.
*
* The systems that were fixed by modifying the OR selection
* code to account for HDA support shouldn't regress here as
* the HDA-enabled ORs match the relevant output's pad macro
* index, and the firmware seems to select an OR this way.
*
* This warning is to make it obvious if that proves wrong.
*/
WARN_ON(hda && !ior->hda);
return nvkm_outp_acquire_ior(outp, user, ior);
}
}
/* If we don't need HDA, first try to acquire an OR that doesn't
* support it to leave free the ones that do.
*/
if (!hda) {
if (!nvkm_outp_acquire_hda(outp, type, user, false))
return 0;
/* Use a HDA-supporting SOR anyway. */
return nvkm_outp_acquire_hda(outp, type, user, true);
}
/* We want HDA, try to acquire an OR that supports it. */
if (!nvkm_outp_acquire_hda(outp, type, user, true))
return 0;
/* There weren't any free ORs that support HDA, grab one that
* doesn't and at least allow display to work still.
*/
return nvkm_outp_acquire_hda(outp, type, user, false);
}
int
nvkm_outp_bl_set(struct nvkm_outp *outp, int level)
{
int ret;
ret = nvkm_outp_acquire_or(outp, NVKM_OUTP_PRIV, false);
if (ret)
return ret;
if (outp->ior->func->bl)
ret = outp->ior->func->bl->set(outp->ior, level);
else
ret = -EINVAL;
nvkm_outp_release_or(outp, NVKM_OUTP_PRIV);
return ret;
}
int
nvkm_outp_bl_get(struct nvkm_outp *outp)
{
int ret;
ret = nvkm_outp_acquire_or(outp, NVKM_OUTP_PRIV, false);
if (ret)
return ret;
if (outp->ior->func->bl)
ret = outp->ior->func->bl->get(outp->ior);
else
ret = -EINVAL;
nvkm_outp_release_or(outp, NVKM_OUTP_PRIV);
return ret;
}
int
nvkm_outp_detect(struct nvkm_outp *outp)
{
struct nvkm_gpio *gpio = outp->disp->engine.subdev.device->gpio;
int ret = -EINVAL;
if (outp->conn->info.hpd != DCB_GPIO_UNUSED) {
ret = nvkm_gpio_get(gpio, 0, DCB_GPIO_UNUSED, outp->conn->info.hpd);
if (ret < 0)
return ret;
if (ret)
return 1;
/*TODO: Look into returning NOT_PRESENT if !HPD on DVI/HDMI.
*
* It's uncertain whether this is accurate for all older chipsets,
* so we're returning UNKNOWN, and the DRM will probe DDC instead.
*/
if (outp->info.type == DCB_OUTPUT_DP)
return 0;
}
return ret;
}
void
nvkm_outp_release(struct nvkm_outp *outp)
{
nvkm_outp_release_or(outp, NVKM_OUTP_USER);
nvkm_outp_route(outp->disp);
}
int
nvkm_outp_acquire(struct nvkm_outp *outp, bool hda)
{
int ret = nvkm_outp_acquire_or(outp, NVKM_OUTP_USER, hda);
if (ret)
return ret;
nvkm_outp_route(outp->disp);
return 0;
}
struct nvkm_ior *
nvkm_outp_inherit(struct nvkm_outp *outp)
{
struct nvkm_disp *disp = outp->disp;
struct nvkm_ior *ior;
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
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 NULL;
ior = nvkm_ior_find(disp, type, -1);
if (WARN_ON(!ior))
return NULL;
/* 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 NULL;
}
} 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 (WARN_ON(!ior))
return NULL;
return ior;
}
void
nvkm_outp_init(struct nvkm_outp *outp)
{
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
struct nvkm_ior *ior;
/* Find any OR from the class that is able to support this device. */
proto = nvkm_outp_xlat(outp, &type);
ior = outp->func->inherit(outp);
if (!ior)
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);
/* The EFI GOP driver on Ampere can leave unused DP links routed,
* which we don't expect. The DisableLT IED script *should* get
* us back to where we need to be.
*/
if (ior->func->route.get && !ior->arm.head && outp->info.type == DCB_OUTPUT_DP)
nvkm_dp_disable(outp, ior);
return;
}
OUTP_DBG(outp, "on %s link %x", ior->name, ior->arm.link);
ior->arm.outp = 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_new_(const struct nvkm_outp_func *func, struct nvkm_disp *disp,
int index, struct dcb_output *dcbE, struct nvkm_outp **poutp)
{
struct nvkm_i2c *i2c = disp->engine.subdev.device->i2c;
struct nvkm_outp *outp;
enum nvkm_ior_proto proto;
enum nvkm_ior_type type;
if (!(outp = *poutp = kzalloc(sizeof(*outp), GFP_KERNEL)))
return -ENOMEM;
outp->func = func;
outp->disp = disp;
outp->index = index;
outp->info = *dcbE;
if (!disp->rm.client.gsp)
outp->i2c = nvkm_i2c_bus_find(i2c, dcbE->i2c_index);
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 = {
.init = nvkm_outp_init,
.detect = nvkm_outp_detect,
.inherit = nvkm_outp_inherit,
.acquire = nvkm_outp_acquire,
.release = nvkm_outp_release,
.bl.get = nvkm_outp_bl_get,
.bl.set = nvkm_outp_bl_set,
};
int
nvkm_outp_new(struct nvkm_disp *disp, int index, struct dcb_output *dcbE,
struct nvkm_outp **poutp)
{
return nvkm_outp_new_(&nvkm_outp, disp, index, dcbE, poutp);
}
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