1/* $NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/device.h>
35
36#include <drm/drm_drv.h>
37#include <drm/drmfb.h>
38
39#include <arm/nvidia/tegra_var.h>
40#include <arm/nvidia/tegra_drm.h>
41
42static int	tegra_fb_match(device_t, cfdata_t, void *);
43static void	tegra_fb_attach(device_t, device_t, void *);
44
45static void	tegra_fb_init(struct tegra_drm_task *);
46
47static bool	tegra_fb_shutdown(device_t, int);
48
49struct tegra_fb_softc {
50	struct drmfb_softc	sc_drmfb;
51	device_t		sc_dev;
52	struct tegra_drm_softc	*sc_drm;
53	struct tegra_drmfb_attach_args sc_tfa;
54	struct tegra_framebuffer *sc_fb;
55	struct tegra_drm_task	sc_attach_task;
56};
57
58static paddr_t	tegra_fb_mmapfb(struct drmfb_softc *, off_t, int);
59static int	tegra_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
60			       lwp_t *);
61
62
63static const struct drmfb_params tegrafb_drmfb_params = {
64	.dp_mmapfb = tegra_fb_mmapfb,
65	.dp_ioctl = tegra_fb_ioctl,
66};
67
68CFATTACH_DECL_NEW(tegra_fb, sizeof(struct tegra_fb_softc),
69	tegra_fb_match, tegra_fb_attach, NULL, NULL);
70
71static int
72tegra_fb_match(device_t parent, cfdata_t cf, void *aux)
73{
74	return 1;
75}
76
77static void
78tegra_fb_attach(device_t parent, device_t self, void *aux)
79{
80	struct tegra_fb_softc * const sc = device_private(self);
81	struct tegra_drm_softc * const drmsc = device_private(parent);
82	struct tegra_drmfb_attach_args * const tfa = aux;
83
84	sc->sc_dev = self;
85	sc->sc_drm = drmsc;
86	sc->sc_tfa = *tfa;
87	sc->sc_fb = to_tegra_framebuffer(tfa->tfa_fb_helper->fb);
88
89	aprint_naive("\n");
90	aprint_normal("\n");
91
92	tegra_task_init(&sc->sc_attach_task, &tegra_fb_init);
93	tegra_task_schedule(parent, &sc->sc_attach_task);
94}
95
96static void
97tegra_fb_init(struct tegra_drm_task *task)
98{
99	struct tegra_fb_softc *sc = container_of(task, struct tegra_fb_softc,
100	    sc_attach_task);
101	device_t self = sc->sc_dev;
102	struct tegra_drmfb_attach_args * const tfa = &sc->sc_tfa;
103	const struct drmfb_attach_args da = {
104		.da_dev = self,
105		.da_fb_helper = tfa->tfa_fb_helper,
106		.da_fb_sizes = &tfa->tfa_fb_sizes,
107		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
108		.da_fb_linebytes = tfa->tfa_fb_linebytes,
109		.da_params = &tegrafb_drmfb_params,
110	};
111	int error;
112
113	error = drmfb_attach(&sc->sc_drmfb, &da);
114	if (error) {
115		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
116		return;
117	}
118
119	pmf_device_register1(self, NULL, NULL, tegra_fb_shutdown);
120}
121
122static bool
123tegra_fb_shutdown(device_t self, int flags)
124{
125	struct tegra_fb_softc * const sc = device_private(self);
126
127	return drmfb_shutdown(&sc->sc_drmfb, flags);
128}
129
130static paddr_t
131tegra_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
132{
133	struct tegra_fb_softc * const tfb_sc = (struct tegra_fb_softc *)sc;
134	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
135
136	KASSERT(off >= 0);
137	KASSERT(off < obj->dmasize);
138
139	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
140	    BUS_DMA_PREFETCHABLE);
141}
142
143static int
144tegra_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
145    lwp_t *l)
146{
147	struct wsdisplayio_bus_id *busid;
148	struct wsdisplayio_fbinfo *fbi;
149	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
150	int error;
151
152	switch (cmd) {
153	case WSDISPLAYIO_GET_BUSID:
154		busid = data;
155		busid->bus_type = WSDISPLAYIO_BUS_SOC;
156		return 0;
157	case WSDISPLAYIO_GTYPE:
158		*(u_int *)data = WSDISPLAY_TYPE_TEGRA;
159		return 0;
160	case WSDISPLAYIO_GET_FBINFO:
161		fbi = data;
162		error = wsdisplayio_get_fbinfo(ri, fbi);
163		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
164		return error;
165	default:
166		return EPASSTHROUGH;
167	}
168}
169