target/linux/brcm2708/patches-4.9/0105-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch

   1 From ffd9952ec22321af8e891aa4cf9d79d90c4b23b6 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Wed, 14 Sep 2016 08:39:33 +0100
   4 Subject: [PATCH] drm/vc4: Add a mode for using the closed firmware for
   5  display.
   6
   7 Signed-off-by: Eric Anholt <eric@anholt.net>
   8 ---
   9  drivers/gpu/drm/vc4/Makefile           |   1 +
  10  drivers/gpu/drm/vc4/vc4_crtc.c         |  13 +
  11  drivers/gpu/drm/vc4/vc4_drv.c          |   1 +
  12  drivers/gpu/drm/vc4/vc4_drv.h          |   7 +
  13  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 660 +++++++++++++++++++++++++++++++++
  14  5 files changed, 682 insertions(+)
  15  create mode 100644 drivers/gpu/drm/vc4/vc4_firmware_kms.c
  16
  17 --- a/drivers/gpu/drm/vc4/Makefile
  18 +++ b/drivers/gpu/drm/vc4/Makefile
  19 @@ -8,6 +8,7 @@ vc4-y := \
  20         vc4_crtc.o \
  21         vc4_drv.o \
  22         vc4_dpi.o \
  23 +       vc4_firmware_kms.o \
  24         vc4_kms.o \
  25         vc4_gem.o \
  26         vc4_hdmi.o \
  27 --- a/drivers/gpu/drm/vc4/vc4_crtc.c
  28 +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
  29 @@ -163,6 +163,9 @@ int vc4_crtc_get_scanoutpos(struct drm_d
  30         int vblank_lines;
  31         int ret = 0;
  32
  33 +       if (vc4->firmware_kms)
  34 +               return 0;
  35 +
  36         /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
  37
  38         /* Get optional system timestamp before query. */
  39 @@ -656,6 +659,11 @@ int vc4_enable_vblank(struct drm_device
  40         struct vc4_dev *vc4 = to_vc4_dev(dev);
  41         struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
  42
  43 +       if (vc4->firmware_kms) {
  44 +               /* XXX: Can we mask the SMI interrupt? */
  45 +               return 0;
  46 +       }
  47 +
  48         CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
  49
  50         return 0;
  51 @@ -666,6 +674,11 @@ void vc4_disable_vblank(struct drm_devic
  52         struct vc4_dev *vc4 = to_vc4_dev(dev);
  53         struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
  54
  55 +       if (vc4->firmware_kms) {
  56 +               /* XXX: Can we mask the SMI interrupt? */
  57 +               return;
  58 +       }
  59 +
  60         CRTC_WRITE(PV_INTEN, 0);
  61  }
  62
  63 --- a/drivers/gpu/drm/vc4/vc4_drv.c
  64 +++ b/drivers/gpu/drm/vc4/vc4_drv.c
  65 @@ -292,6 +292,7 @@ static struct platform_driver *const com
  66         &vc4_dpi_driver,
  67         &vc4_hvs_driver,
  68         &vc4_crtc_driver,
  69 +       &vc4_firmware_kms_driver,
  70         &vc4_v3d_driver,
  71  };
  72
  73 --- a/drivers/gpu/drm/vc4/vc4_drv.h
  74 +++ b/drivers/gpu/drm/vc4/vc4_drv.h
  75 @@ -12,6 +12,9 @@
  76  struct vc4_dev {
  77         struct drm_device *dev;
  78
  79 +       bool firmware_kms;
  80 +       struct rpi_firmware *firmware;
  81 +
  82         struct vc4_hdmi *hdmi;
  83         struct vc4_hvs *hvs;
  84         struct vc4_crtc *crtc[3];
  85 @@ -460,6 +463,10 @@ void __iomem *vc4_ioremap_regs(struct pl
  86  extern struct platform_driver vc4_dpi_driver;
  87  int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused);
  88
  89 +/* vc4_firmware_kms.c */
  90 +extern struct platform_driver vc4_firmware_kms_driver;
  91 +void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
  92 +
  93  /* vc4_gem.c */
  94  void vc4_gem_init(struct drm_device *dev);
  95  void vc4_gem_destroy(struct drm_device *dev);
  96 --- /dev/null
  97 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  98 @@ -0,0 +1,660 @@
  99 +/*
 100 + * Copyright (C) 2016 Broadcom
 101 + *
 102 + * This program is free software; you can redistribute it and/or modify
 103 + * it under the terms of the GNU General Public License version 2 as
 104 + * published by the Free Software Foundation.
 105 + */
 106 +
 107 +/**
 108 + * DOC: VC4 firmware KMS module.
 109 + *
 110 + * As a hack to get us from the current closed source driver world
 111 + * toward a totally open stack, implement KMS on top of the Raspberry
 112 + * Pi's firmware display stack.
 113 + */
 114 +
 115 +#include "drm_atomic.h"
 116 +#include "drm_atomic_helper.h"
 117 +#include "drm_plane_helper.h"
 118 +#include "drm_crtc_helper.h"
 119 +#include "linux/clk.h"
 120 +#include "linux/debugfs.h"
 121 +#include "drm_fb_cma_helper.h"
 122 +#include "linux/component.h"
 123 +#include "linux/of_device.h"
 124 +#include "vc4_drv.h"
 125 +#include "vc4_regs.h"
 126 +#include <soc/bcm2835/raspberrypi-firmware.h>
 127 +
 128 +/* The firmware delivers a vblank interrupt to us through the SMI
 129 + * hardware, which has only this one register.
 130 + */
 131 +#define SMICS 0x0
 132 +#define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11))
 133 +
 134 +struct vc4_crtc {
 135 +       struct drm_crtc base;
 136 +       struct drm_encoder *encoder;
 137 +       struct drm_connector *connector;
 138 +       void __iomem *regs;
 139 +
 140 +       struct drm_pending_vblank_event *event;
 141 +};
 142 +
 143 +static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc)
 144 +{
 145 +       return container_of(crtc, struct vc4_crtc, base);
 146 +}
 147 +
 148 +struct vc4_fkms_encoder {
 149 +       struct drm_encoder base;
 150 +};
 151 +
 152 +static inline struct vc4_fkms_encoder *
 153 +to_vc4_fkms_encoder(struct drm_encoder *encoder)
 154 +{
 155 +       return container_of(encoder, struct vc4_fkms_encoder, base);
 156 +}
 157 +
 158 +/* VC4 FKMS connector KMS struct */
 159 +struct vc4_fkms_connector {
 160 +       struct drm_connector base;
 161 +
 162 +       /* Since the connector is attached to just the one encoder,
 163 +        * this is the reference to it so we can do the best_encoder()
 164 +        * hook.
 165 +        */
 166 +       struct drm_encoder *encoder;
 167 +};
 168 +
 169 +static inline struct vc4_fkms_connector *
 170 +to_vc4_fkms_connector(struct drm_connector *connector)
 171 +{
 172 +       return container_of(connector, struct vc4_fkms_connector, base);
 173 +}
 174 +
 175 +/* Firmware's structure for making an FB mbox call. */
 176 +struct fbinfo_s {
 177 +       u32 xres, yres, xres_virtual, yres_virtual;
 178 +       u32 pitch, bpp;
 179 +       u32 xoffset, yoffset;
 180 +       u32 base;
 181 +       u32 screen_size;
 182 +       u16 cmap[256];
 183 +};
 184 +
 185 +struct vc4_fkms_plane {
 186 +       struct drm_plane base;
 187 +       struct fbinfo_s *fbinfo;
 188 +       dma_addr_t fbinfo_bus_addr;
 189 +       u32 pitch;
 190 +};
 191 +
 192 +static inline struct vc4_fkms_plane *to_vc4_fkms_plane(struct drm_plane *plane)
 193 +{
 194 +       return (struct vc4_fkms_plane *)plane;
 195 +}
 196 +
 197 +/* Turns the display on/off. */
 198 +static int vc4_plane_set_primary_blank(struct drm_plane *plane, bool blank)
 199 +{
 200 +       struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 201 +
 202 +       u32 packet = blank;
 203 +       return rpi_firmware_property(vc4->firmware,
 204 +                                    RPI_FIRMWARE_FRAMEBUFFER_BLANK,
 205 +                                    &packet, sizeof(packet));
 206 +}
 207 +
 208 +static void vc4_primary_plane_atomic_update(struct drm_plane *plane,
 209 +                                           struct drm_plane_state *old_state)
 210 +{
 211 +       struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 212 +       struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
 213 +       struct drm_plane_state *state = plane->state;
 214 +       struct drm_framebuffer *fb = state->fb;
 215 +       struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
 216 +       volatile struct fbinfo_s *fbinfo = vc4_plane->fbinfo;
 217 +       u32 bpp = 32;
 218 +       int ret;
 219 +
 220 +       vc4_plane_set_primary_blank(plane, false);
 221 +
 222 +       fbinfo->xres = state->crtc_w;
 223 +       fbinfo->yres = state->crtc_h;
 224 +       fbinfo->xres_virtual = state->crtc_w;
 225 +       fbinfo->yres_virtual = state->crtc_h;
 226 +       fbinfo->bpp = bpp;
 227 +       fbinfo->xoffset = state->crtc_x;
 228 +       fbinfo->yoffset = state->crtc_y;
 229 +       fbinfo->base = bo->paddr + fb->offsets[0];
 230 +       fbinfo->pitch = fb->pitches[0];
 231 +       /* A bug in the firmware makes it so that if the fb->base is
 232 +        * set to nonzero, the configured pitch gets overwritten with
 233 +        * the previous pitch.  So, to get the configured pitch
 234 +        * recomputed, we have to make it allocate itself a new buffer
 235 +        * in VC memory, first.
 236 +        */
 237 +       if (vc4_plane->pitch != fb->pitches[0]) {
 238 +               u32 saved_base = fbinfo->base;
 239 +               fbinfo->base = 0;
 240 +
 241 +               ret = rpi_firmware_transaction(vc4->firmware,
 242 +                                              RPI_FIRMWARE_CHAN_FB,
 243 +                                              vc4_plane->fbinfo_bus_addr);
 244 +               fbinfo->base = saved_base;
 245 +
 246 +               vc4_plane->pitch = fbinfo->pitch;
 247 +               WARN_ON_ONCE(vc4_plane->pitch != fb->pitches[0]);
 248 +       }
 249 +
 250 +       ret = rpi_firmware_transaction(vc4->firmware,
 251 +                                      RPI_FIRMWARE_CHAN_FB,
 252 +                                      vc4_plane->fbinfo_bus_addr);
 253 +       WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]);
 254 +       WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]);
 255 +}
 256 +
 257 +static void vc4_primary_plane_atomic_disable(struct drm_plane *plane,
 258 +                                            struct drm_plane_state *old_state)
 259 +{
 260 +       vc4_plane_set_primary_blank(plane, true);
 261 +}
 262 +
 263 +static void vc4_cursor_plane_atomic_update(struct drm_plane *plane,
 264 +                                          struct drm_plane_state *old_state)
 265 +{
 266 +       struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 267 +       struct drm_plane_state *state = plane->state;
 268 +       struct drm_framebuffer *fb = state->fb;
 269 +       struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
 270 +       int ret;
 271 +       u32 packet_state[] = { true, state->crtc_x, state->crtc_y, 0 };
 272 +       u32 packet_info[] = { state->crtc_w, state->crtc_h,
 273 +                             0, /* unused */
 274 +                             bo->paddr + fb->offsets[0],
 275 +                             0, 0, /* hotx, hoty */};
 276 +       WARN_ON_ONCE(fb->pitches[0] != state->crtc_w * 4);
 277 +       WARN_ON_ONCE(fb->bits_per_pixel != 32);
 278 +
 279 +       ret = rpi_firmware_property(vc4->firmware,
 280 +                                   RPI_FIRMWARE_SET_CURSOR_STATE,
 281 +                                   &packet_state,
 282 +                                   sizeof(packet_state));
 283 +       if (ret || packet_state[0] != 0)
 284 +               DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
 285 +
 286 +       ret = rpi_firmware_property(vc4->firmware,
 287 +                                   RPI_FIRMWARE_SET_CURSOR_INFO,
 288 +                                   &packet_info,
 289 +                                   sizeof(packet_info));
 290 +       if (ret || packet_info[0] != 0)
 291 +               DRM_ERROR("Failed to set cursor info: 0x%08x\n", packet_info[0]);
 292 +}
 293 +
 294 +static void vc4_cursor_plane_atomic_disable(struct drm_plane *plane,
 295 +                                           struct drm_plane_state *old_state)
 296 +{
 297 +       struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
 298 +       u32 packet_state[] = { false, 0, 0, 0 };
 299 +       int ret;
 300 +
 301 +       ret = rpi_firmware_property(vc4->firmware,
 302 +                                   RPI_FIRMWARE_SET_CURSOR_STATE,
 303 +                                   &packet_state,
 304 +                                   sizeof(packet_state));
 305 +       if (ret || packet_state[0] != 0)
 306 +               DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
 307 +}
 308 +
 309 +static int vc4_plane_atomic_check(struct drm_plane *plane,
 310 +                                 struct drm_plane_state *state)
 311 +{
 312 +       return 0;
 313 +}
 314 +
 315 +static void vc4_plane_destroy(struct drm_plane *plane)
 316 +{
 317 +       drm_plane_helper_disable(plane);
 318 +       drm_plane_cleanup(plane);
 319 +}
 320 +
 321 +static const struct drm_plane_funcs vc4_plane_funcs = {
 322 +       .update_plane = drm_atomic_helper_update_plane,
 323 +       .disable_plane = drm_atomic_helper_disable_plane,
 324 +       .destroy = vc4_plane_destroy,
 325 +       .set_property = NULL,
 326 +       .reset = drm_atomic_helper_plane_reset,
 327 +       .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 328 +       .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 329 +};
 330 +
 331 +static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = {
 332 +       .prepare_fb = NULL,
 333 +       .cleanup_fb = NULL,
 334 +       .atomic_check = vc4_plane_atomic_check,
 335 +       .atomic_update = vc4_primary_plane_atomic_update,
 336 +       .atomic_disable = vc4_primary_plane_atomic_disable,
 337 +};
 338 +
 339 +static const struct drm_plane_helper_funcs vc4_cursor_plane_helper_funcs = {
 340 +       .prepare_fb = NULL,
 341 +       .cleanup_fb = NULL,
 342 +       .atomic_check = vc4_plane_atomic_check,
 343 +       .atomic_update = vc4_cursor_plane_atomic_update,
 344 +       .atomic_disable = vc4_cursor_plane_atomic_disable,
 345 +};
 346 +
 347 +static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
 348 +                                            enum drm_plane_type type)
 349 +{
 350 +       struct drm_plane *plane = NULL;
 351 +       struct vc4_fkms_plane *vc4_plane;
 352 +       u32 xrgb8888 = DRM_FORMAT_XRGB8888;
 353 +       u32 argb8888 = DRM_FORMAT_ARGB8888;
 354 +       int ret = 0;
 355 +       bool primary = (type == DRM_PLANE_TYPE_PRIMARY);
 356 +
 357 +       vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane),
 358 +                                GFP_KERNEL);
 359 +       if (!vc4_plane) {
 360 +               ret = -ENOMEM;
 361 +               goto fail;
 362 +       }
 363 +
 364 +       plane = &vc4_plane->base;
 365 +       ret = drm_universal_plane_init(dev, plane, 0xff,
 366 +                                      &vc4_plane_funcs,
 367 +                                      primary ? &xrgb8888 : &argb8888, 1,
 368 +                                      type, NULL);
 369 +
 370 +       if (type == DRM_PLANE_TYPE_PRIMARY) {
 371 +               vc4_plane->fbinfo =
 372 +                       dma_alloc_coherent(dev->dev,
 373 +                                          sizeof(*vc4_plane->fbinfo),
 374 +                                          &vc4_plane->fbinfo_bus_addr,
 375 +                                          GFP_KERNEL);
 376 +               memset(vc4_plane->fbinfo, 0, sizeof(*vc4_plane->fbinfo));
 377 +
 378 +               drm_plane_helper_add(plane, &vc4_primary_plane_helper_funcs);
 379 +       } else {
 380 +               drm_plane_helper_add(plane, &vc4_cursor_plane_helper_funcs);
 381 +       }
 382 +
 383 +       return plane;
 384 +fail:
 385 +       if (plane)
 386 +               vc4_plane_destroy(plane);
 387 +
 388 +       return ERR_PTR(ret);
 389 +}
 390 +
 391 +static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
 392 +{
 393 +       /* Everyting is handled in the planes. */
 394 +}
 395 +
 396 +static void vc4_crtc_disable(struct drm_crtc *crtc)
 397 +{
 398 +}
 399 +
 400 +static void vc4_crtc_enable(struct drm_crtc *crtc)
 401 +{
 402 +}
 403 +
 404 +static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
 405 +                                struct drm_crtc_state *state)
 406 +{
 407 +       return 0;
 408 +}
 409 +
 410 +static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
 411 +                                 struct drm_crtc_state *old_state)
 412 +{
 413 +}
 414 +
 415 +static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
 416 +{
 417 +       struct drm_crtc *crtc = &vc4_crtc->base;
 418 +       struct drm_device *dev = crtc->dev;
 419 +       unsigned long flags;
 420 +
 421 +       spin_lock_irqsave(&dev->event_lock, flags);
 422 +       if (vc4_crtc->event) {
 423 +               drm_crtc_send_vblank_event(crtc, vc4_crtc->event);
 424 +               vc4_crtc->event = NULL;
 425 +               drm_crtc_vblank_put(crtc);
 426 +       }
 427 +       spin_unlock_irqrestore(&dev->event_lock, flags);
 428 +}
 429 +
 430 +static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
 431 +{
 432 +       struct vc4_crtc *vc4_crtc = data;
 433 +       u32 stat = readl(vc4_crtc->regs + SMICS);
 434 +       irqreturn_t ret = IRQ_NONE;
 435 +
 436 +       if (stat & SMICS_INTERRUPTS) {
 437 +               writel(0, vc4_crtc->regs + SMICS);
 438 +               drm_crtc_handle_vblank(&vc4_crtc->base);
 439 +               vc4_crtc_handle_page_flip(vc4_crtc);
 440 +               ret = IRQ_HANDLED;
 441 +       }
 442 +
 443 +       return ret;
 444 +}
 445 +
 446 +static int vc4_page_flip(struct drm_crtc *crtc,
 447 +                        struct drm_framebuffer *fb,
 448 +                        struct drm_pending_vblank_event *event,
 449 +                        uint32_t flags)
 450 +{
 451 +       if (flags & DRM_MODE_PAGE_FLIP_ASYNC) {
 452 +               DRM_ERROR("Async flips aren't allowed\n");
 453 +               return -EINVAL;
 454 +       }
 455 +
 456 +       return drm_atomic_helper_page_flip(crtc, fb, event, flags);
 457 +}
 458 +
 459 +static const struct drm_crtc_funcs vc4_crtc_funcs = {
 460 +       .set_config = drm_atomic_helper_set_config,
 461 +       .destroy = drm_crtc_cleanup,
 462 +       .page_flip = vc4_page_flip,
 463 +       .set_property = NULL,
 464 +       .cursor_set = NULL, /* handled by drm_mode_cursor_universal */
 465 +       .cursor_move = NULL, /* handled by drm_mode_cursor_universal */
 466 +       .reset = drm_atomic_helper_crtc_reset,
 467 +       .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 468 +       .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 469 +};
 470 +
 471 +static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
 472 +       .mode_set_nofb = vc4_crtc_mode_set_nofb,
 473 +       .disable = vc4_crtc_disable,
 474 +       .enable = vc4_crtc_enable,
 475 +       .atomic_check = vc4_crtc_atomic_check,
 476 +       .atomic_flush = vc4_crtc_atomic_flush,
 477 +};
 478 +
 479 +/* Frees the page flip event when the DRM device is closed with the
 480 + * event still outstanding.
 481 + */
 482 +void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
 483 +{
 484 +       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
 485 +       struct drm_device *dev = crtc->dev;
 486 +       unsigned long flags;
 487 +
 488 +       spin_lock_irqsave(&dev->event_lock, flags);
 489 +
 490 +       if (vc4_crtc->event && vc4_crtc->event->base.file_priv == file) {
 491 +               kfree(&vc4_crtc->event->base);
 492 +               drm_crtc_vblank_put(crtc);
 493 +               vc4_crtc->event = NULL;
 494 +       }
 495 +
 496 +       spin_unlock_irqrestore(&dev->event_lock, flags);
 497 +}
 498 +
 499 +static const struct of_device_id vc4_firmware_kms_dt_match[] = {
 500 +       { .compatible = "raspberrypi,rpi-firmware-kms" },
 501 +       {}
 502 +};
 503 +
 504 +static enum drm_connector_status
 505 +vc4_fkms_connector_detect(struct drm_connector *connector, bool force)
 506 +{
 507 +       return connector_status_connected;
 508 +}
 509 +
 510 +static int vc4_fkms_connector_get_modes(struct drm_connector *connector)
 511 +{
 512 +       struct drm_device *dev = connector->dev;
 513 +       struct vc4_dev *vc4 = to_vc4_dev(dev);
 514 +       u32 wh[2] = {0, 0};
 515 +       int ret;
 516 +       struct drm_display_mode *mode;
 517 +
 518 +       ret = rpi_firmware_property(vc4->firmware,
 519 +                                   RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT,
 520 +                                   &wh, sizeof(wh));
 521 +       if (ret) {
 522 +               DRM_ERROR("Failed to get screen size: %d (0x%08x 0x%08x)\n",
 523 +                         ret, wh[0], wh[1]);
 524 +               return 0;
 525 +       }
 526 +
 527 +       mode = drm_cvt_mode(dev, wh[0], wh[1], 60 /* vrefresh */,
 528 +                           0, 0, false);
 529 +       drm_mode_probed_add(connector, mode);
 530 +
 531 +       return 1;
 532 +}
 533 +
 534 +static struct drm_encoder *
 535 +vc4_fkms_connector_best_encoder(struct drm_connector *connector)
 536 +{
 537 +       struct vc4_fkms_connector *fkms_connector =
 538 +               to_vc4_fkms_connector(connector);
 539 +       return fkms_connector->encoder;
 540 +}
 541 +
 542 +static void vc4_fkms_connector_destroy(struct drm_connector *connector)
 543 +{
 544 +       drm_connector_unregister(connector);
 545 +       drm_connector_cleanup(connector);
 546 +}
 547 +
 548 +static const struct drm_connector_funcs vc4_fkms_connector_funcs = {
 549 +       .dpms = drm_atomic_helper_connector_dpms,
 550 +       .detect = vc4_fkms_connector_detect,
 551 +       .fill_modes = drm_helper_probe_single_connector_modes,
 552 +       .destroy = vc4_fkms_connector_destroy,
 553 +       .reset = drm_atomic_helper_connector_reset,
 554 +       .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 555 +       .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 556 +};
 557 +
 558 +static const struct drm_connector_helper_funcs vc4_fkms_connector_helper_funcs = {
 559 +       .get_modes = vc4_fkms_connector_get_modes,
 560 +       .best_encoder = vc4_fkms_connector_best_encoder,
 561 +};
 562 +
 563 +static struct drm_connector *vc4_fkms_connector_init(struct drm_device *dev,
 564 +                                                    struct drm_encoder *encoder)
 565 +{
 566 +       struct drm_connector *connector = NULL;
 567 +       struct vc4_fkms_connector *fkms_connector;
 568 +       int ret = 0;
 569 +
 570 +       fkms_connector = devm_kzalloc(dev->dev, sizeof(*fkms_connector),
 571 +                                     GFP_KERNEL);
 572 +       if (!fkms_connector) {
 573 +               ret = -ENOMEM;
 574 +               goto fail;
 575 +       }
 576 +       connector = &fkms_connector->base;
 577 +
 578 +       fkms_connector->encoder = encoder;
 579 +
 580 +       drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
 581 +                          DRM_MODE_CONNECTOR_HDMIA);
 582 +       drm_connector_helper_add(connector, &vc4_fkms_connector_helper_funcs);
 583 +
 584 +       connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
 585 +                            DRM_CONNECTOR_POLL_DISCONNECT);
 586 +
 587 +       connector->interlace_allowed = 0;
 588 +       connector->doublescan_allowed = 0;
 589 +
 590 +       drm_mode_connector_attach_encoder(connector, encoder);
 591 +
 592 +       return connector;
 593 +
 594 + fail:
 595 +       if (connector)
 596 +               vc4_fkms_connector_destroy(connector);
 597 +
 598 +       return ERR_PTR(ret);
 599 +}
 600 +
 601 +static void vc4_fkms_encoder_destroy(struct drm_encoder *encoder)
 602 +{
 603 +       drm_encoder_cleanup(encoder);
 604 +}
 605 +
 606 +static const struct drm_encoder_funcs vc4_fkms_encoder_funcs = {
 607 +       .destroy = vc4_fkms_encoder_destroy,
 608 +};
 609 +
 610 +static void vc4_fkms_encoder_enable(struct drm_encoder *encoder)
 611 +{
 612 +}
 613 +
 614 +static void vc4_fkms_encoder_disable(struct drm_encoder *encoder)
 615 +{
 616 +}
 617 +
 618 +static const struct drm_encoder_helper_funcs vc4_fkms_encoder_helper_funcs = {
 619 +       .enable = vc4_fkms_encoder_enable,
 620 +       .disable = vc4_fkms_encoder_disable,
 621 +};
 622 +
 623 +static int vc4_fkms_bind(struct device *dev, struct device *master, void *data)
 624 +{
 625 +       struct platform_device *pdev = to_platform_device(dev);
 626 +       struct drm_device *drm = dev_get_drvdata(master);
 627 +       struct vc4_dev *vc4 = to_vc4_dev(drm);
 628 +       struct vc4_crtc *vc4_crtc;
 629 +       struct vc4_fkms_encoder *vc4_encoder;
 630 +       struct drm_crtc *crtc;
 631 +       struct drm_plane *primary_plane, *cursor_plane, *destroy_plane, *temp;
 632 +       struct device_node *firmware_node;
 633 +       int ret;
 634 +
 635 +       vc4->firmware_kms = true;
 636 +
 637 +       vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
 638 +       if (!vc4_crtc)
 639 +               return -ENOMEM;
 640 +       crtc = &vc4_crtc->base;
 641 +
 642 +       firmware_node = of_parse_phandle(dev->of_node, "brcm,firmware", 0);
 643 +       vc4->firmware = rpi_firmware_get(firmware_node);
 644 +       if (!vc4->firmware) {
 645 +               DRM_DEBUG("Failed to get Raspberry Pi firmware reference.\n");
 646 +               return -EPROBE_DEFER;
 647 +       }
 648 +       of_node_put(firmware_node);
 649 +
 650 +       /* Map the SMI interrupt reg */
 651 +       vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
 652 +       if (IS_ERR(vc4_crtc->regs))
 653 +               return PTR_ERR(vc4_crtc->regs);
 654 +
 655 +       /* For now, we create just the primary and the legacy cursor
 656 +        * planes.  We should be able to stack more planes on easily,
 657 +        * but to do that we would need to compute the bandwidth
 658 +        * requirement of the plane configuration, and reject ones
 659 +        * that will take too much.
 660 +        */
 661 +       primary_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
 662 +       if (IS_ERR(primary_plane)) {
 663 +               dev_err(dev, "failed to construct primary plane\n");
 664 +               ret = PTR_ERR(primary_plane);
 665 +               goto err;
 666 +       }
 667 +
 668 +       cursor_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
 669 +       if (IS_ERR(cursor_plane)) {
 670 +               dev_err(dev, "failed to construct cursor plane\n");
 671 +               ret = PTR_ERR(cursor_plane);
 672 +               goto err;
 673 +       }
 674 +
 675 +       drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane,
 676 +                                 &vc4_crtc_funcs, NULL);
 677 +       drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
 678 +       primary_plane->crtc = crtc;
 679 +       cursor_plane->crtc = crtc;
 680 +       vc4->crtc[drm_crtc_index(crtc)] = vc4_crtc;
 681 +
 682 +       vc4_encoder = devm_kzalloc(dev, sizeof(*vc4_encoder), GFP_KERNEL);
 683 +       if (!vc4_encoder)
 684 +               return -ENOMEM;
 685 +       vc4_crtc->encoder = &vc4_encoder->base;
 686 +       vc4_encoder->base.possible_crtcs |= drm_crtc_mask(crtc) ;
 687 +       drm_encoder_init(drm, &vc4_encoder->base, &vc4_fkms_encoder_funcs,
 688 +                        DRM_MODE_ENCODER_TMDS, NULL);
 689 +       drm_encoder_helper_add(&vc4_encoder->base,
 690 +                              &vc4_fkms_encoder_helper_funcs);
 691 +
 692 +       vc4_crtc->connector = vc4_fkms_connector_init(drm, &vc4_encoder->base);
 693 +       if (IS_ERR(vc4_crtc->connector)) {
 694 +               ret = PTR_ERR(vc4_crtc->connector);
 695 +               goto err_destroy_encoder;
 696 +       }
 697 +
 698 +       writel(0, vc4_crtc->regs + SMICS);
 699 +       ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
 700 +                              vc4_crtc_irq_handler, 0, "vc4 firmware kms",
 701 +                              vc4_crtc);
 702 +       if (ret)
 703 +               goto err_destroy_connector;
 704 +
 705 +       platform_set_drvdata(pdev, vc4_crtc);
 706 +
 707 +       return 0;
 708 +
 709 +err_destroy_connector:
 710 +       vc4_fkms_connector_destroy(vc4_crtc->connector);
 711 +err_destroy_encoder:
 712 +       vc4_fkms_encoder_destroy(vc4_crtc->encoder);
 713 +       list_for_each_entry_safe(destroy_plane, temp,
 714 +                                &drm->mode_config.plane_list, head) {
 715 +               if (destroy_plane->possible_crtcs == 1 << drm_crtc_index(crtc))
 716 +                   destroy_plane->funcs->destroy(destroy_plane);
 717 +       }
 718 +err:
 719 +       return ret;
 720 +}
 721 +
 722 +static void vc4_fkms_unbind(struct device *dev, struct device *master,
 723 +                           void *data)
 724 +{
 725 +       struct platform_device *pdev = to_platform_device(dev);
 726 +       struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev);
 727 +
 728 +       vc4_fkms_connector_destroy(vc4_crtc->connector);
 729 +       vc4_fkms_encoder_destroy(vc4_crtc->encoder);
 730 +       drm_crtc_cleanup(&vc4_crtc->base);
 731 +
 732 +       platform_set_drvdata(pdev, NULL);
 733 +}
 734 +
 735 +static const struct component_ops vc4_fkms_ops = {
 736 +       .bind   = vc4_fkms_bind,
 737 +       .unbind = vc4_fkms_unbind,
 738 +};
 739 +
 740 +static int vc4_fkms_probe(struct platform_device *pdev)
 741 +{
 742 +       return component_add(&pdev->dev, &vc4_fkms_ops);
 743 +}
 744 +
 745 +static int vc4_fkms_remove(struct platform_device *pdev)
 746 +{
 747 +       component_del(&pdev->dev, &vc4_fkms_ops);
 748 +       return 0;
 749 +}
 750 +
 751 +struct platform_driver vc4_firmware_kms_driver = {
 752 +       .probe = vc4_fkms_probe,
 753 +       .remove = vc4_fkms_remove,
 754 +       .driver = {
 755 +               .name = "vc4_firmware_kms",
 756 +               .of_match_table = vc4_firmware_kms_dt_match,
 757 +       },
 758 +};