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rk_fb.c revision 1.3 
      1 /* $NetBSD: rk_fb.c,v 1.3 2021/12/19 11:00:46 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015-2019 Jared McNeill <jmcneill (at) 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: rk_fb.c,v 1.3 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/rockchip/rk_drm.h>
     44 
     45 static int	rk_fb_match(device_t, cfdata_t, void *);
     46 static void	rk_fb_attach(device_t, device_t, void *);
     47 
     48 static bool	rk_fb_shutdown(device_t, int);
     49 
     50 struct rk_fb_softc {
     51 	struct drmfb_softc	sc_drmfb;
     52 	device_t		sc_dev;
     53 	struct rk_drm_framebuffer *sc_fb;
     54 	struct rk_drmfb_attach_args sc_sfa;
     55 };
     56 
     57 static paddr_t	rk_fb_mmapfb(struct drmfb_softc *, off_t, int);
     58 static int	rk_fb_ioctl(struct drmfb_softc *, u_long, void *, int,
     59 			       lwp_t *);
     60 
     61 static const struct drmfb_params rkfb_drmfb_params = {
     62 	.dp_mmapfb = rk_fb_mmapfb,
     63 	.dp_ioctl = rk_fb_ioctl,
     64 };
     65 
     66 CFATTACH_DECL_NEW(rk_fb, sizeof(struct rk_fb_softc),
     67 	rk_fb_match, rk_fb_attach, NULL, NULL);
     68 
     69 static int
     70 rk_fb_match(device_t parent, cfdata_t cf, void *aux)
     71 {
     72 	return 1;
     73 }
     74 
     75 static void
     76 rk_fb_attach(device_t parent, device_t self, void *aux)
     77 {
     78 	struct rk_fb_softc * const sc = device_private(self);
     79 	struct rk_drmfb_attach_args * const sfa = aux;
     80 	int error;
     81 
     82 	sc->sc_dev = self;
     83 	sc->sc_sfa = *sfa;
     84 	sc->sc_fb = to_rk_drm_framebuffer(sfa->sfa_fb_helper->fb);
     85 
     86 	aprint_naive("\n");
     87 	aprint_normal("\n");
     88 
     89 #ifdef WSDISPLAY_MULTICONS
     90 	prop_dictionary_t dict = device_properties(self);
     91 	const bool is_console = true;
     92 	prop_dictionary_set_bool(dict, "is_console", is_console);
     93 #endif
     94 
     95 	const struct drmfb_attach_args da = {
     96 		.da_dev = self,
     97 		.da_fb_helper = sfa->sfa_fb_helper,
     98 		.da_fb_sizes = &sfa->sfa_fb_sizes,
     99 		.da_fb_vaddr = sc->sc_fb->obj->vaddr,
    100 		.da_fb_linebytes = sfa->sfa_fb_linebytes,
    101 		.da_params = &rkfb_drmfb_params,
    102 	};
    103 
    104 	error = drmfb_attach(&sc->sc_drmfb, &da);
    105 	if (error) {
    106 		aprint_error_dev(self, "failed to attach drmfb: %d\n", error);
    107 		return;
    108 	}
    109 
    110 	pmf_device_register1(self, NULL, NULL, rk_fb_shutdown);
    111 }
    112 
    113 static bool
    114 rk_fb_shutdown(device_t self, int flags)
    115 {
    116 	struct rk_fb_softc * const sc = device_private(self);
    117 
    118 	return drmfb_shutdown(&sc->sc_drmfb, flags);
    119 }
    120 
    121 static paddr_t
    122 rk_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot)
    123 {
    124 	struct rk_fb_softc * const tfb_sc = (struct rk_fb_softc *)sc;
    125 	struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj;
    126 
    127 	KASSERT(off >= 0);
    128 	KASSERT(off < obj->dmasize);
    129 
    130 	return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot,
    131 	    BUS_DMA_PREFETCHABLE);
    132 }
    133 
    134 static int
    135 rk_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag,
    136     lwp_t *l)
    137 {
    138 	struct wsdisplayio_bus_id *busid;
    139 	struct wsdisplayio_fbinfo *fbi;
    140 	struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri;
    141 	int error;
    142 
    143 	switch (cmd) {
    144 	case WSDISPLAYIO_GET_BUSID:
    145 		busid = data;
    146 		busid->bus_type = WSDISPLAYIO_BUS_SOC;
    147 		return 0;
    148 	case WSDISPLAYIO_GTYPE:
    149 		*(u_int *)data = WSDISPLAY_TYPE_GENFB;
    150 		return 0;
    151 	case WSDISPLAYIO_GET_FBINFO:
    152 		fbi = data;
    153 		error = wsdisplayio_get_fbinfo(ri, fbi);
    154 		fbi->fbi_flags |= WSFB_VRAM_IS_RAM;
    155 		return error;
    156 	default:
    157 		return EPASSTHROUGH;
    158 	}
    159 }
    160