1 /* $NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2015 Jared D. 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 <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: tegra_fb.c,v 1.6 2021/12/19 12:44:50 riastradh Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 36 #include <drm/drm_drv.h> 37 #include <drm/drmfb.h> 38 39 #include <arm/nvidia/tegra_var.h> 40 #include <arm/nvidia/tegra_drm.h> 41 42 static int tegra_fb_match(device_t, cfdata_t, void *); 43 static void tegra_fb_attach(device_t, device_t, void *); 44 45 static void tegra_fb_init(struct tegra_drm_task *); 46 47 static bool tegra_fb_shutdown(device_t, int); 48 49 struct tegra_fb_softc { 50 struct drmfb_softc sc_drmfb; 51 device_t sc_dev; 52 struct tegra_drm_softc *sc_drm; 53 struct tegra_drmfb_attach_args sc_tfa; 54 struct tegra_framebuffer *sc_fb; 55 struct tegra_drm_task sc_attach_task; 56 }; 57 58 static paddr_t tegra_fb_mmapfb(struct drmfb_softc *, off_t, int); 59 static int tegra_fb_ioctl(struct drmfb_softc *, u_long, void *, int, 60 lwp_t *); 61 62 63 static const struct drmfb_params tegrafb_drmfb_params = { 64 .dp_mmapfb = tegra_fb_mmapfb, 65 .dp_ioctl = tegra_fb_ioctl, 66 }; 67 68 CFATTACH_DECL_NEW(tegra_fb, sizeof(struct tegra_fb_softc), 69 tegra_fb_match, tegra_fb_attach, NULL, NULL); 70 71 static int 72 tegra_fb_match(device_t parent, cfdata_t cf, void *aux) 73 { 74 return 1; 75 } 76 77 static void 78 tegra_fb_attach(device_t parent, device_t self, void *aux) 79 { 80 struct tegra_fb_softc * const sc = device_private(self); 81 struct tegra_drm_softc * const drmsc = device_private(parent); 82 struct tegra_drmfb_attach_args * const tfa = aux; 83 84 sc->sc_dev = self; 85 sc->sc_drm = drmsc; 86 sc->sc_tfa = *tfa; 87 sc->sc_fb = to_tegra_framebuffer(tfa->tfa_fb_helper->fb); 88 89 aprint_naive("\n"); 90 aprint_normal("\n"); 91 92 tegra_task_init(&sc->sc_attach_task, &tegra_fb_init); 93 tegra_task_schedule(parent, &sc->sc_attach_task); 94 } 95 96 static void 97 tegra_fb_init(struct tegra_drm_task *task) 98 { 99 struct tegra_fb_softc *sc = container_of(task, struct tegra_fb_softc, 100 sc_attach_task); 101 device_t self = sc->sc_dev; 102 struct tegra_drmfb_attach_args * const tfa = &sc->sc_tfa; 103 const struct drmfb_attach_args da = { 104 .da_dev = self, 105 .da_fb_helper = tfa->tfa_fb_helper, 106 .da_fb_sizes = &tfa->tfa_fb_sizes, 107 .da_fb_vaddr = sc->sc_fb->obj->vaddr, 108 .da_fb_linebytes = tfa->tfa_fb_linebytes, 109 .da_params = &tegrafb_drmfb_params, 110 }; 111 int error; 112 113 error = drmfb_attach(&sc->sc_drmfb, &da); 114 if (error) { 115 aprint_error_dev(self, "failed to attach drmfb: %d\n", error); 116 return; 117 } 118 119 pmf_device_register1(self, NULL, NULL, tegra_fb_shutdown); 120 } 121 122 static bool 123 tegra_fb_shutdown(device_t self, int flags) 124 { 125 struct tegra_fb_softc * const sc = device_private(self); 126 127 return drmfb_shutdown(&sc->sc_drmfb, flags); 128 } 129 130 static paddr_t 131 tegra_fb_mmapfb(struct drmfb_softc *sc, off_t off, int prot) 132 { 133 struct tegra_fb_softc * const tfb_sc = (struct tegra_fb_softc *)sc; 134 struct drm_gem_cma_object *obj = tfb_sc->sc_fb->obj; 135 136 KASSERT(off >= 0); 137 KASSERT(off < obj->dmasize); 138 139 return bus_dmamem_mmap(obj->dmat, obj->dmasegs, 1, off, prot, 140 BUS_DMA_PREFETCHABLE); 141 } 142 143 static int 144 tegra_fb_ioctl(struct drmfb_softc *sc, u_long cmd, void *data, int flag, 145 lwp_t *l) 146 { 147 struct wsdisplayio_bus_id *busid; 148 struct wsdisplayio_fbinfo *fbi; 149 struct rasops_info *ri = &sc->sc_genfb.vd.active->scr_ri; 150 int error; 151 152 switch (cmd) { 153 case WSDISPLAYIO_GET_BUSID: 154 busid = data; 155 busid->bus_type = WSDISPLAYIO_BUS_SOC; 156 return 0; 157 case WSDISPLAYIO_GTYPE: 158 *(u_int *)data = WSDISPLAY_TYPE_TEGRA; 159 return 0; 160 case WSDISPLAYIO_GET_FBINFO: 161 fbi = data; 162 error = wsdisplayio_get_fbinfo(ri, fbi); 163 fbi->fbi_flags |= WSFB_VRAM_IS_RAM; 164 return error; 165 default: 166 return EPASSTHROUGH; 167 } 168 } 169
Indexes created Sat Sep 20 22:09:52 GMT 2025