sunxi_fb.c revision 1.4 
1/* $NetBSD: sunxi_fb.c,v 1.4 2021/12/19 11:00:46 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 1.4 2021/12/19 11:00:46 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 <drm/drm_drv.h>
41#include <drm/drmfb.h>
42
43#include <arm/sunxi/sunxi_drm.h>
44
45static int	sunxi_fb_match(device_t, cfdata_t, void *);
46static void	sunxi_fb_attach(device_t, device_t, void *);
47
48static bool	sunxi_fb_shutdown(device_t, int);
49
50struct sunxi_fb_softc {
51	struct drmfb_softc	sc_drmfb;
52	device_t		sc_dev;
53	struct sunxi_drm_softc	*sc_drm;
54	struct sunxi_drm_framebuffer *sc_fb;
55	struct sunxi_drmfb_attach_args sc_sfa;
56};
57
58static paddr_t	sunxi_fb_mmapfb(struct drmfb_softc *, off_t, int);
59static int	sunxi_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
60			       lwp_t *);
61
62static const struct drmfb_params sunxifb_drmfb_params = {
63	.dp_mmapfb = sunxi_fb_mmapfb,
64	.dp_ioctl = sunxi_fb_ioctl,
65
66};
67
68CFATTACH_DECL_NEW(sunxi_fb, sizeof(struct sunxi_fb_softc),
69	sunxi_fb_match, sunxi_fb_attach, NULL, NULL);
70
71static int
72sunxi_fb_match(device_t parent, cfdata_t cf, void *aux)
73{
74	return 1;
75}
76
77static void
78sunxi_fb_attach(device_t parent, device_t self, void *aux)
79{
80	struct sunxi_fb_softc * const sc = device_private(self);
81	struct sunxi_drm_softc * const drmsc = device_private(parent);
82	struct sunxi_drmfb_attach_args * const sfa = aux;
83	int error;
84
85	sc->sc_dev = self;
86	sc->sc_drm = drmsc;
87	sc->sc_sfa = *sfa;
88	sc->sc_fb = to_sunxi_drm_framebuffer(sfa->sfa_fb_helper->fb);
89
90	aprint_naive("\n");
91	aprint_normal("\n");
92
93#ifdef WSDISPLAY_MULTICONS
94	prop_dictionary_t dict = device_properties(self);
95	const bool is_console = true;
96	prop_dictionary_set_bool(dict, "is_console", is_console);
97#endif
98
99	const struct drmfb_attach_args da = {
100		.da_dev = self,
101		.da_fb_helper = sfa->sfa_fb_helper,
102		.da_fb_sizes = &sfa->sfa_fb_sizes,
103		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
104		.da_fb_linebytes = sfa->sfa_fb_linebytes,
105		.da_params = &sunxifb_drmfb_params,
106	};
107
108	error = drmfb_attach(&sc->sc_drmfb, &da);
109	if (error) {
110		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
111		return;
112	}
113
114	pmf_device_register1(self, NULL, NULL, sunxi_fb_shutdown);
115}
116
117static bool
118sunxi_fb_shutdown(device_t self, int flags)
119{
120	struct sunxi_fb_softc * const sc = device_private(self);
121
122	return drmfb_shutdown(&sc->sc_drmfb, flags);
123}
124
125static paddr_t
126sunxi_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
127{
128	struct sunxi_fb_softc * const tfb_sc = (struct sunxi_fb_softc *)sc;
129	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
130
131	KASSERT(off >= 0);
132	KASSERT(off < obj->dmasize);
133
134	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
135	    BUS_DMA_PREFETCHABLE);
136}
137
138static int
139sunxi_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
140    lwp_t *l)
141{
142	struct wsdisplayio_bus_id *busid;
143	struct wsdisplayio_fbinfo *fbi;
144	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
145	int error;
146
147	switch (cmd) {
148	case WSDISPLAYIO_GET_BUSID:
149		busid = data;
150		busid->bus_type = WSDISPLAYIO_BUS_SOC;
151		return 0;
152	case WSDISPLAYIO_GTYPE:
153		*(u_int *)data = WSDISPLAY_TYPE_GENFB;
154		return 0;
155	case WSDISPLAYIO_GET_FBINFO:
156		fbi = data;
157		error = wsdisplayio_get_fbinfo(ri, fbi);
158		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
159		return error;
160	default:
161		return EPASSTHROUGH;
162	}
163}
164