drm/nouveau/disp/nv50-: avoid creating ORs that aren't present on HW

[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / nouveau / nvkm / engine / disp / sornv50.c

/*
 * Copyright 2012 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 "ior.h"

#include <subdev/timer.h>

void
nv50_sor_clock(struct nvkm_ior *sor)
{
	struct nvkm_device *device = sor->disp->engine.subdev.device;
	const int  div = sor->asy.link == 3;
	const u32 soff = nv50_ior_base(sor);
	nvkm_mask(device, 0x614300 + soff, 0x00000707, (div << 8) | div);
}

static void
nv50_sor_power_wait(struct nvkm_device *device, u32 soff)
{
	nvkm_msec(device, 2000,
		if (!(nvkm_rd32(device, 0x61c004 + soff) & 0x80000000))
			break;
	);
}

void
nv50_sor_power(struct nvkm_ior *sor, bool normal, bool pu,
	       bool data, bool vsync, bool hsync)
{
	struct nvkm_device *device = sor->disp->engine.subdev.device;
	const u32  soff = nv50_ior_base(sor);
	const u32 shift = normal ? 0 : 16;
	const u32 state = 0x80000000 | (0x00000001 * !!pu) << shift;
	const u32 field = 0x80000000 | (0x00000001 << shift);

	nv50_sor_power_wait(device, soff);
	nvkm_mask(device, 0x61c004 + soff, field, state);
	nv50_sor_power_wait(device, soff);

	nvkm_msec(device, 2000,
		if (!(nvkm_rd32(device, 0x61c030 + soff) & 0x10000000))
			break;
	);
}

void
nv50_sor_state(struct nvkm_ior *sor, struct nvkm_ior_state *state)
{
	struct nvkm_device *device = sor->disp->engine.subdev.device;
	const u32 coff = sor->id * 8 + (state == &sor->arm) * 4;
	u32 ctrl = nvkm_rd32(device, 0x610b70 + coff);

	state->proto_evo = (ctrl & 0x00000f00) >> 8;
	switch (state->proto_evo) {
	case 0: state->proto = LVDS; state->link = 1; break;
	case 1: state->proto = TMDS; state->link = 1; break;
	case 2: state->proto = TMDS; state->link = 2; break;
	case 5: state->proto = TMDS; state->link = 3; break;
	default:
		state->proto = UNKNOWN;
		break;
	}

	state->head = ctrl & 0x00000003;
}

int
nv50_sor_new_(const struct nvkm_ior_func *func, struct nvkm_disp *disp, int id)
{
	struct nvkm_device *device = disp->engine.subdev.device;
	if (!(nvkm_rd32(device, 0x610184) & (0x01000000 << id)))
		return 0;
	return nvkm_ior_new_(func, disp, SOR, id);
}

static const struct nvkm_ior_func
nv50_sor = {
	.state = nv50_sor_state,
	.power = nv50_sor_power,
	.clock = nv50_sor_clock,
};

int
nv50_sor_new(struct nvkm_disp *disp, int id)
{
	return nv50_sor_new_(&nv50_sor, disp, id);
}