1 /* $NetBSD: rk_fb.c,v 1.2 2021/05/21 09:33:27 jmcneill 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: rk_fb.c,v 1.2 2021/05/21 09:33:27 jmcneill 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/drmP.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