1 /* $NetBSD: rk_fb.c,v 1.7 2022/09/25 07:50:15 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 1.7 2022/09/25 07:50:15 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/rockchip/rk_drm.h> 41 42 #include <drm/drm_drv.h> 43 #include <drm/drmfb.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 void rk_fb_init(struct rk_drm_task *); 49 50 static bool rk_fb_shutdown(device_t, int); 51 52 struct rk_fb_softc { 53 struct drmfb_softc sc_drmfb; 54 device_t sc_dev; 55 struct rk_drm_framebuffer *sc_fb; 56 struct rk_drmfb_attach_args sc_sfa; 57 struct rk_drm_task sc_attach_task; 58 }; 59 60 static paddr_t rk_fb_mmapfb(struct drmfb_softc *, off_t, int); 61 static int rk_fb_ioctl(struct drmfb_softc *, u_long, void *, int, 62 lwp_t *); 63 64 static const struct drmfb_params rkfb_drmfb_params = { 65 .dp_mmapfb = rk_fb_mmapfb, 66 .dp_ioctl = rk_fb_ioctl, 67 }; 68 69 CFATTACH_DECL_NEW(rk_fb, sizeof(struct rk_fb_softc), 70 rk_fb_match, rk_fb_attach, NULL, NULL); 71 72 static int 73 rk_fb_match(device_t parent, cfdata_t cf, void *aux) 74 { 75 return 1; 76 } 77 78 static void 79 rk_fb_attach(device_t parent, device_t self, void *aux) 80 { 81 struct rk_fb_softc * const sc = device_private(self); 82 struct rk_drmfb_attach_args * const sfa = aux; 83 84 sc->sc_dev = self; 85 sc->sc_sfa = *sfa; 86 sc->sc_fb = to_rk_drm_framebuffer(sfa->sfa_fb_helper->fb); 87 88 aprint_naive("\n"); 89 aprint_normal("\n"); 90 91 rk_task_init(&sc->sc_attach_task, &rk_fb_init); 92 rk_task_schedule(parent, &sc->sc_attach_task); 93 } 94 95 static void 96 rk_fb_turnoffandbackonagain(device_t self) 97 { 98 struct rk_fb_softc *sc = device_private(self); 99 struct rk_drmfb_attach_args * const sfa = &sc->sc_sfa; 100 101 /* 102 * This is a grody kludge to turn the display off and back on 103 * again at boot; otherwise the initial modeset doesn't take. 104 * This is surely a bug somewhere in rk_vop.c or nearby, but I 105 * haven't been able to find it, and this gives us almost the 106 * same effect. 107 */ 108 mutex_lock(&sfa->sfa_fb_helper->lock); 109 drm_client_modeset_dpms(&sfa->sfa_fb_helper->client, DRM_MODE_DPMS_OFF); 110 drm_client_modeset_dpms(&sfa->sfa_fb_helper->client, DRM_MODE_DPMS_ON); 111 mutex_unlock(&sfa->sfa_fb_helper->lock); 112 } 113 114 static void 115 rk_fb_init(struct rk_drm_task *task) 116 { 117 struct rk_fb_softc * const sc = 118 container_of(task, struct rk_fb_softc, sc_attach_task); 119 device_t self = sc->sc_dev; 120 struct rk_drmfb_attach_args * const sfa = &sc->sc_sfa; 121 int error; 122 123 const struct drmfb_attach_args da = { 124 .da_dev = self, 125 .da_fb_helper = sfa->sfa_fb_helper, 126 .da_fb_sizes = &sfa->sfa_fb_sizes, 127 .da_fb_vaddr = sc->sc_fb->obj->vaddr, 128 .da_fb_linebytes = sfa->sfa_fb_linebytes, 129 .da_params = &rkfb_drmfb_params, 130 }; 131 132 error = drmfb_attach(&sc->sc_drmfb, &da); 133 if (error) { 134 aprint_error_dev(self, "failed to attach drmfb: %d\n", error); 135 return; 136 } 137 138 pmf_device_register1(self, NULL, NULL, rk_fb_shutdown); 139 140 config_interrupts(self, rk_fb_turnoffandbackonagain); 141 } 142 143 static bool 144 rk_fb_shutdown(device_t self, int flags) 145 { 146 struct rk_fb_softc * const sc = device_private(self); 147 148 return drmfb_shutdown(&sc->sc_drmfb, flags); 149 } 150 151 static paddr_t 152 rk_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot) 153 { 154 struct rk_fb_softc * const tfb_sc = (struct rk_fb_softc *)sc; 155 struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj; 156 157 KASSERT(off >= 0); 158 KASSERT(off < obj->dmasize); 159 160 return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot, 161 BUS_DMA_PREFETCHABLE); 162 } 163 164 static int 165 rk_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag, 166 lwp_t *l) 167 { 168 struct wsdisplayio_bus_id *busid; 169 struct wsdisplayio_fbinfo *fbi; 170 struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri; 171 int error; 172 173 switch (cmd) { 174 case WSDISPLAYIO_GET_BUSID: 175 busid = data; 176 busid->bus_type = WSDISPLAYIO_BUS_SOC; 177 return 0; 178 case WSDISPLAYIO_GTYPE: 179 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 180 return 0; 181 case WSDISPLAYIO_GET_FBINFO: 182 fbi = data; 183 error = wsdisplayio_get_fbinfo(ri, fbi); 184 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 185 return error; 186 default: 187 return EPASSTHROUGH; 188 } 189 } 190
Indexes created Sun Sep 21 14:09:52 GMT 2025