drmfb.c revision 1.2
1 /* $NetBSD: drmfb.c,v 1.2 2015/11/09 23:11:18 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * drmfb: wsdisplay support, via genfb, for any drm device. Use this 34 * if you're too lazy to write a hardware-accelerated framebuffer using 35 * wsdisplay directly. 36 * 37 * This doesn't actually do anything interesting -- just hooks up 38 * drmkms crap and genfb crap. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: drmfb.c,v 1.2 2015/11/09 23:11:18 jmcneill Exp $"); 43 44 #ifdef _KERNEL_OPT 45 #include "vga.h" 46 #endif 47 48 #include <sys/types.h> 49 #include <sys/param.h> 50 #include <sys/bus.h> 51 #include <sys/device.h> 52 #include <sys/kauth.h> 53 54 #if NVGA > 0 55 /* 56 * XXX All we really need is vga_is_console from vgavar.h, but the 57 * header files are missing their own dependencies, so we need to 58 * explicitly drag in the other crap. 59 */ 60 #include <dev/ic/mc6845reg.h> 61 #include <dev/ic/pcdisplayvar.h> 62 #include <dev/ic/vgareg.h> 63 #include <dev/ic/vgavar.h> 64 #endif 65 66 #include <dev/wsfb/genfbvar.h> 67 68 #include <drm/drmP.h> 69 #include <drm/drm_fb_helper.h> 70 #include <drm/drmfb.h> 71 72 static int drmfb_genfb_ioctl(void *, void *, unsigned long, void *, int, 73 struct lwp *); 74 static paddr_t drmfb_genfb_mmap(void *, void *, off_t, int); 75 static int drmfb_genfb_enable_polling(void *); 76 static int drmfb_genfb_disable_polling(void *); 77 static bool drmfb_genfb_setmode(struct genfb_softc *, int); 78 79 static const struct genfb_mode_callback drmfb_genfb_mode_callback = { 80 .gmc_setmode = drmfb_genfb_setmode, 81 }; 82 83 int 84 drmfb_attach(struct drmfb_softc *sc, const struct drmfb_attach_args *da) 85 { 86 const struct drm_fb_helper_surface_size *const sizes = da->da_fb_sizes; 87 const prop_dictionary_t dict = device_properties(da->da_dev); 88 #if NVGA > 0 89 struct drm_device *const dev = da->da_fb_helper->dev; 90 #endif 91 static const struct genfb_ops zero_genfb_ops; 92 struct genfb_ops genfb_ops = zero_genfb_ops; 93 enum { CONS_VGA, CONS_GENFB, CONS_NONE } what_was_cons; 94 bool is_console; 95 int error; 96 97 /* genfb requires this. */ 98 KASSERTMSG((void *)&sc->sc_genfb == device_private(da->da_dev), 99 "drmfb_softc must be first member of device softc"); 100 101 sc->sc_da = *da; 102 103 prop_dictionary_set_uint32(dict, "width", sizes->surface_width); 104 prop_dictionary_set_uint32(dict, "height", sizes->surface_height); 105 prop_dictionary_set_uint8(dict, "depth", sizes->surface_bpp); 106 prop_dictionary_set_uint16(dict, "linebytes", 107 roundup2((sizes->surface_width * howmany(sizes->surface_bpp, 8)), 108 64)); 109 prop_dictionary_set_uint32(dict, "address", 0); /* XXX >32-bit */ 110 CTASSERT(sizeof(uintptr_t) <= sizeof(uint64_t)); 111 prop_dictionary_set_uint64(dict, "virtual_address", 112 (uint64_t)(uintptr_t)da->da_fb_vaddr); 113 114 prop_dictionary_set_uint64(dict, "mode_callback", 115 (uint64_t)(uintptr_t)&drmfb_genfb_mode_callback); 116 117 if (!prop_dictionary_get_bool(dict, "is_console", &is_console)) { 118 /* XXX Whattakludge! */ 119 #if NVGA > 0 120 if ((da->da_params->dp_is_vga_console != NULL) && 121 (*da->da_params->dp_is_vga_console)(dev)) { 122 what_was_cons = CONS_VGA; 123 prop_dictionary_set_bool(dict, "is_console", true); 124 vga_cndetach(); 125 if (da->da_params->dp_disable_vga) 126 (*da->da_params->dp_disable_vga)(dev); 127 } else 128 #endif 129 if (genfb_is_console() && genfb_is_enabled()) { 130 what_was_cons = CONS_GENFB; 131 prop_dictionary_set_bool(dict, "is_console", true); 132 } else { 133 what_was_cons = CONS_NONE; 134 prop_dictionary_set_bool(dict, "is_console", false); 135 } 136 } else { 137 what_was_cons = CONS_NONE; 138 } 139 140 sc->sc_genfb.sc_dev = sc->sc_da.da_dev; 141 genfb_init(&sc->sc_genfb); 142 genfb_ops.genfb_ioctl = drmfb_genfb_ioctl; 143 genfb_ops.genfb_mmap = drmfb_genfb_mmap; 144 genfb_ops.genfb_enable_polling = drmfb_genfb_enable_polling; 145 genfb_ops.genfb_disable_polling = drmfb_genfb_disable_polling; 146 147 error = genfb_attach(&sc->sc_genfb, &genfb_ops); 148 if (error) { 149 aprint_error_dev(sc->sc_da.da_dev, 150 "failed to attach genfb: %d\n", error); 151 goto fail0; 152 } 153 154 /* Success! */ 155 return 0; 156 157 fail0: KASSERT(error); 158 /* XXX Restore console... */ 159 switch (what_was_cons) { 160 case CONS_VGA: 161 break; 162 case CONS_GENFB: 163 break; 164 case CONS_NONE: 165 break; 166 default: 167 break; 168 } 169 return error; 170 } 171 172 int 173 drmfb_detach(struct drmfb_softc *sc, int flags) 174 { 175 176 /* XXX genfb detach? */ 177 return 0; 178 } 179 180 static int 181 drmfb_genfb_ioctl(void *v, void *vs, unsigned long cmd, void *data, int flag, 182 struct lwp *l) 183 { 184 struct genfb_softc *const genfb = v; 185 struct drmfb_softc *const sc = container_of(genfb, struct drmfb_softc, 186 sc_genfb); 187 int error; 188 189 if (sc->sc_da.da_params->dp_ioctl) { 190 error = (*sc->sc_da.da_params->dp_ioctl)(sc, cmd, data, flag, 191 l); 192 if (error != EPASSTHROUGH) 193 return error; 194 } 195 196 switch (cmd) { 197 /* 198 * Screen blanking ioctls. Not to be confused with backlight 199 * (can be disabled while stuff is still drawn on the screen), 200 * brightness, or contrast (which we don't support). Backlight 201 * and brightness are done through WSDISPLAYIO_{GET,SET}PARAM. 202 * This toggles between DPMS ON and DPMS OFF; backlight toggles 203 * between DPMS ON and DPMS SUSPEND. 204 */ 205 case WSDISPLAYIO_GVIDEO: { 206 int *onp = (int *)data; 207 208 /* XXX Can't really determine a single answer here. */ 209 *onp = 1; 210 return 0; 211 } 212 case WSDISPLAYIO_SVIDEO: { 213 const int on = *(const int *)data; 214 const int dpms_mode = on? DRM_MODE_DPMS_ON : DRM_MODE_DPMS_OFF; 215 struct drm_fb_helper *const fb_helper = sc->sc_da.da_fb_helper; 216 struct drm_device *const dev = fb_helper->dev; 217 unsigned i; 218 219 drm_modeset_lock_all(dev); 220 for (i = 0; i < fb_helper->connector_count; i++) { 221 struct drm_connector *const connector = 222 fb_helper->connector_info[i]->connector; 223 (*connector->funcs->dpms)(connector, dpms_mode); 224 drm_object_property_set_value(&connector->base, 225 dev->mode_config.dpms_property, dpms_mode); 226 } 227 drm_modeset_unlock_all(dev); 228 229 return 0; 230 } 231 default: 232 return EPASSTHROUGH; 233 } 234 } 235 236 static paddr_t 237 drmfb_genfb_mmap(void *v, void *vs, off_t offset, int prot) 238 { 239 struct genfb_softc *const genfb = v; 240 struct drmfb_softc *const sc = container_of(genfb, struct drmfb_softc, 241 sc_genfb); 242 243 KASSERT(0 <= offset); 244 245 if (offset < genfb->sc_fbsize) { 246 if (sc->sc_da.da_params->dp_mmapfb == NULL) 247 return -1; 248 return (*sc->sc_da.da_params->dp_mmapfb)(sc, offset, prot); 249 } else { 250 if (kauth_authorize_machdep(kauth_cred_get(), 251 KAUTH_MACHDEP_UNMANAGEDMEM, NULL, NULL, NULL, NULL) 252 != 0) 253 return -1; 254 if (sc->sc_da.da_params->dp_mmap == NULL) 255 return -1; 256 return (*sc->sc_da.da_params->dp_mmap)(sc, offset, prot); 257 } 258 } 259 260 static int 261 drmfb_genfb_enable_polling(void *cookie) 262 { 263 struct genfb_softc *const genfb = cookie; 264 struct drmfb_softc *const sc = container_of(genfb, struct drmfb_softc, 265 sc_genfb); 266 267 return drm_fb_helper_debug_enter_fb(sc->sc_da.da_fb_helper); 268 } 269 270 static int 271 drmfb_genfb_disable_polling(void *cookie) 272 { 273 struct genfb_softc *const genfb = cookie; 274 struct drmfb_softc *const sc = container_of(genfb, struct drmfb_softc, 275 sc_genfb); 276 277 return drm_fb_helper_debug_leave_fb(sc->sc_da.da_fb_helper); 278 } 279 280 static bool 281 drmfb_genfb_setmode(struct genfb_softc *genfb, int mode) 282 { 283 struct drmfb_softc *sc = container_of(genfb, struct drmfb_softc, 284 sc_genfb); 285 286 if (mode == WSDISPLAYIO_MODE_EMUL) 287 drm_fb_helper_set_config(sc->sc_da.da_fb_helper); 288 289 return true; 290 } 291 292 bool 293 drmfb_shutdown(struct drmfb_softc *sc, int flags __unused) 294 { 295 296 genfb_enable_polling(sc->sc_da.da_dev); 297 return true; 298 } 299
Indexes created Tue Sep 23 07:09:52 GMT 2025