| 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 | |