outp.c

/*
 * 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>

static enum nvkm_ior_proto
nvkm_outp_xlat(struct nvkm_output *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_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_fini(struct nvkm_outp *outp)
{
	if (outp->func->fini)
		outp->func->fini(outp);
}

static void
nvkm_outp_init_route(struct nvkm_output *outp)
{
	struct nvkm_disp *disp = outp->disp;
	enum nvkm_ior_proto proto;
	enum nvkm_ior_type type;
	struct nvkm_ior *ior;
	int id;

	proto = nvkm_outp_xlat(outp, &type);
	if (proto == UNKNOWN)
		return;

	/* Determine the specific OR, if any, this device is attached to. */
	if (1) {
		/* Prior to DCB 4.1, this is hardwired like so. */
		id = ffs(outp->info.or) - 1;
	}

	ior = nvkm_ior_find(disp, type, id);
	if (!ior) {
		WARN_ON(1);
		return;
	}

	outp->ior = ior;
}

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;
}

int
nvkm_outp_new_(const struct nvkm_outp_func *func,
	       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(func, disp, index, dcbE, *poutp);
}