sunxi_fb.c revision 1.8 
1/* $NetBSD: sunxi_fb.c,v 1.8 2022/09/25 07:50:23 riastradh Exp $ */
2
3/*-
4 * Copyright (c) 2015-2019 Jared 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 "opt_wsdisplay_compat.h"
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: sunxi_fb.c,v 1.8 2022/09/25 07:50:23 riastradh Exp $");
33
34#include <sys/param.h>
35#include <sys/bus.h>
36#include <sys/device.h>
37
38#include <dev/fdt/fdtvar.h>
39
40#include <arm/sunxi/sunxi_drm.h>
41
42#include <drm/drm_drv.h>
43#include <drm/drmfb.h>
44
45static int	sunxi_fb_match(device_t, cfdata_t, void *);
46static void	sunxi_fb_attach(device_t, device_t, void *);
47
48static void	sunxi_fb_init(struct sunxi_drm_task *);
49
50static bool	sunxi_fb_shutdown(device_t, int);
51
52struct sunxi_fb_softc {
53	struct drmfb_softc	sc_drmfb;
54	device_t		sc_dev;
55	struct sunxi_drm_softc	*sc_drm;
56	struct sunxi_drm_framebuffer *sc_fb;
57	struct sunxi_drmfb_attach_args sc_sfa;
58	struct sunxi_drm_task	sc_attach_task;
59};
60
61static paddr_t	sunxi_fb_mmapfb(struct drmfb_softc *, off_t, int);
62static int	sunxi_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
63			       lwp_t *);
64
65static const struct drmfb_params sunxifb_drmfb_params = {
66	.dp_mmapfb = sunxi_fb_mmapfb,
67	.dp_ioctl = sunxi_fb_ioctl,
68
69};
70
71CFATTACH_DECL_NEW(sunxi_fb, sizeof(struct sunxi_fb_softc),
72	sunxi_fb_match, sunxi_fb_attach, NULL, NULL);
73
74static int
75sunxi_fb_match(device_t parent, cfdata_t cf, void *aux)
76{
77	return 1;
78}
79
80static void
81sunxi_fb_attach(device_t parent, device_t self, void *aux)
82{
83	struct sunxi_fb_softc * const sc = device_private(self);
84	struct sunxi_drm_softc * const drmsc = device_private(parent);
85	struct sunxi_drmfb_attach_args * const sfa = aux;
86
87	sc->sc_dev = self;
88	sc->sc_drm = drmsc;
89	sc->sc_sfa = *sfa;
90	sc->sc_fb = to_sunxi_drm_framebuffer(sfa->sfa_fb_helper->fb);
91
92	aprint_naive("\n");
93	aprint_normal("\n");
94
95	sunxi_task_init(&sc->sc_attach_task, &sunxi_fb_init);
96	sunxi_task_schedule(parent, &sc->sc_attach_task);
97}
98
99static void
100sunxi_fb_init(struct sunxi_drm_task *task)
101{
102	struct sunxi_fb_softc * const sc =
103	    container_of(task, struct sunxi_fb_softc, sc_attach_task);
104	device_t dev = sc->sc_dev;
105	struct sunxi_drmfb_attach_args * const sfa = &sc->sc_sfa;
106	int error;
107
108	const struct drmfb_attach_args da = {
109		.da_dev = dev,
110		.da_fb_helper = sfa->sfa_fb_helper,
111		.da_fb_sizes = &sfa->sfa_fb_sizes,
112		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
113		.da_fb_linebytes = sfa->sfa_fb_linebytes,
114		.da_params = &sunxifb_drmfb_params,
115	};
116
117
118	error = drmfb_attach(&sc->sc_drmfb, &da);
119	if (error) {
120		aprint_error_dev(dev, "failed to attach drmfb: %d\n", error);
121		return;
122	}
123
124	pmf_device_register1(dev, NULL, NULL, sunxi_fb_shutdown);
125}
126
127static bool
128sunxi_fb_shutdown(device_t self, int flags)
129{
130	struct sunxi_fb_softc * const sc = device_private(self);
131
132	return drmfb_shutdown(&sc->sc_drmfb, flags);
133}
134
135static paddr_t
136sunxi_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
137{
138	struct sunxi_fb_softc * const tfb_sc = (struct sunxi_fb_softc *)sc;
139	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
140
141	KASSERT(off >= 0);
142	KASSERT(off < obj->dmasize);
143
144	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
145	    BUS_DMA_PREFETCHABLE);
146}
147
148static int
149sunxi_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
150    lwp_t *l)
151{
152	struct wsdisplayio_bus_id *busid;
153	struct wsdisplayio_fbinfo *fbi;
154	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
155	int error;
156
157	switch (cmd) {
158	case WSDISPLAYIO_GET_BUSID:
159		busid = data;
160		busid->bus_type = WSDISPLAYIO_BUS_SOC;
161		return 0;
162	case WSDISPLAYIO_GTYPE:
163		*(u_int *)data = WSDISPLAY_TYPE_GENFB;
164		return 0;
165	case WSDISPLAYIO_GET_FBINFO:
166		fbi = data;
167		error = wsdisplayio_get_fbinfo(ri, fbi);
168		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
169		return error;
170	default:
171		return EPASSTHROUGH;
172	}
173}
174