drivers/gpu/drm/imx/ipuv3-crtc.c

   1 /*
   2  * i.MX IPUv3 Graphics driver
   3  *
   4  * Copyright (C) 2011 Sascha Hauer, Pengutronix
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18  * MA 02110-1301, USA.
  19  */
  20 #include <linux/component.h>
  21 #include <linux/module.h>
  22 #include <linux/export.h>
  23 #include <linux/device.h>
  24 #include <linux/platform_device.h>
  25 #include <drm/drmP.h>
  26 #include <drm/drm_crtc_helper.h>
  27 #include <linux/fb.h>
  28 #include <linux/clk.h>
  29 #include <linux/errno.h>
  30 #include <drm/drm_gem_cma_helper.h>
  31 #include <drm/drm_fb_cma_helper.h>
  32
  33 #include <video/imx-ipu-v3.h>
  34 #include "imx-drm.h"
  35 #include "ipuv3-plane.h"
  36
  37 #define DRIVER_DESC             "i.MX IPUv3 Graphics"
  38
  39 struct ipu_crtc {
  40         struct device           *dev;
  41         struct drm_crtc         base;
  42         struct imx_drm_crtc     *imx_crtc;
  43
  44         /* plane[0] is the full plane, plane[1] is the partial plane */
  45         struct ipu_plane        *plane[2];
  46
  47         struct ipu_dc           *dc;
  48         struct ipu_di           *di;
  49         int                     enabled;
  50         struct drm_pending_vblank_event *page_flip_event;
  51         struct drm_framebuffer  *newfb;
  52         int                     irq;
  53         u32                     interface_pix_fmt;
  54         unsigned long           di_clkflags;
  55         int                     di_hsync_pin;
  56         int                     di_vsync_pin;
  57 };
  58
  59 #define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
  60
  61 static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
  62 {
  63         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
  64
  65         if (ipu_crtc->enabled)
  66                 return;
  67
  68         ipu_dc_enable(ipu);
  69         ipu_plane_enable(ipu_crtc->plane[0]);
  70         /* Start DC channel and DI after IDMAC */
  71         ipu_dc_enable_channel(ipu_crtc->dc);
  72         ipu_di_enable(ipu_crtc->di);
  73
  74         ipu_crtc->enabled = 1;
  75 }
  76
  77 static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
  78 {
  79         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
  80
  81         if (!ipu_crtc->enabled)
  82                 return;
  83
  84         /* Stop DC channel and DI before IDMAC */
  85         ipu_dc_disable_channel(ipu_crtc->dc);
  86         ipu_di_disable(ipu_crtc->di);
  87         ipu_plane_disable(ipu_crtc->plane[0]);
  88         ipu_dc_disable(ipu);
  89
  90         ipu_crtc->enabled = 0;
  91 }
  92
  93 static void ipu_crtc_dpms(struct drm_crtc *crtc, int mode)
  94 {
  95         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
  96
  97         dev_dbg(ipu_crtc->dev, "%s mode: %d\n", __func__, mode);
  98
  99         switch (mode) {
 100         case DRM_MODE_DPMS_ON:
 101                 ipu_fb_enable(ipu_crtc);
 102                 break;
 103         case DRM_MODE_DPMS_STANDBY:
 104         case DRM_MODE_DPMS_SUSPEND:
 105         case DRM_MODE_DPMS_OFF:
 106                 ipu_fb_disable(ipu_crtc);
 107                 break;
 108         }
 109 }
 110
 111 static int ipu_page_flip(struct drm_crtc *crtc,
 112                 struct drm_framebuffer *fb,
 113                 struct drm_pending_vblank_event *event,
 114                 uint32_t page_flip_flags)
 115 {
 116         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 117         int ret;
 118
 119         if (ipu_crtc->newfb)
 120                 return -EBUSY;
 121
 122         ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
 123         if (ret) {
 124                 dev_dbg(ipu_crtc->dev, "failed to acquire vblank counter\n");
 125                 list_del(&event->base.link);
 126
 127                 return ret;
 128         }
 129
 130         ipu_crtc->newfb = fb;
 131         ipu_crtc->page_flip_event = event;
 132         crtc->primary->fb = fb;
 133
 134         return 0;
 135 }
 136
 137 static const struct drm_crtc_funcs ipu_crtc_funcs = {
 138         .set_config = drm_crtc_helper_set_config,
 139         .destroy = drm_crtc_cleanup,
 140         .page_flip = ipu_page_flip,
 141 };
 142
 143 static int ipu_crtc_mode_set(struct drm_crtc *crtc,
 144                                struct drm_display_mode *orig_mode,
 145                                struct drm_display_mode *mode,
 146                                int x, int y,
 147                                struct drm_framebuffer *old_fb)
 148 {
 149         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 150         int ret;
 151         struct ipu_di_signal_cfg sig_cfg = {};
 152         u32 out_pixel_fmt;
 153
 154         dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
 155                         mode->hdisplay);
 156         dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
 157                         mode->vdisplay);
 158
 159         out_pixel_fmt = ipu_crtc->interface_pix_fmt;
 160
 161         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 162                 sig_cfg.interlaced = 1;
 163         if (mode->flags & DRM_MODE_FLAG_PHSYNC)
 164                 sig_cfg.Hsync_pol = 1;
 165         if (mode->flags & DRM_MODE_FLAG_PVSYNC)
 166                 sig_cfg.Vsync_pol = 1;
 167
 168         sig_cfg.enable_pol = 1;
 169         sig_cfg.clk_pol = 0;
 170         sig_cfg.width = mode->hdisplay;
 171         sig_cfg.height = mode->vdisplay;
 172         sig_cfg.pixel_fmt = out_pixel_fmt;
 173         sig_cfg.h_start_width = mode->htotal - mode->hsync_end;
 174         sig_cfg.h_sync_width = mode->hsync_end - mode->hsync_start;
 175         sig_cfg.h_end_width = mode->hsync_start - mode->hdisplay;
 176
 177         sig_cfg.v_start_width = mode->vtotal - mode->vsync_end;
 178         sig_cfg.v_sync_width = mode->vsync_end - mode->vsync_start;
 179         sig_cfg.v_end_width = mode->vsync_start - mode->vdisplay;
 180         sig_cfg.pixelclock = mode->clock * 1000;
 181         sig_cfg.clkflags = ipu_crtc->di_clkflags;
 182
 183         sig_cfg.v_to_h_sync = 0;
 184
 185         sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
 186         sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
 187
 188         ret = ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di, sig_cfg.interlaced,
 189                         out_pixel_fmt, mode->hdisplay);
 190         if (ret) {
 191                 dev_err(ipu_crtc->dev,
 192                                 "initializing display controller failed with %d\n",
 193                                 ret);
 194                 return ret;
 195         }
 196
 197         ret = ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
 198         if (ret) {
 199                 dev_err(ipu_crtc->dev,
 200                                 "initializing panel failed with %d\n", ret);
 201                 return ret;
 202         }
 203
 204         return ipu_plane_mode_set(ipu_crtc->plane[0], crtc, mode,
 205                                   crtc->primary->fb,
 206                                   0, 0, mode->hdisplay, mode->vdisplay,
 207                                   x, y, mode->hdisplay, mode->vdisplay);
 208 }
 209
 210 static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
 211 {
 212         unsigned long flags;
 213         struct drm_device *drm = ipu_crtc->base.dev;
 214
 215         spin_lock_irqsave(&drm->event_lock, flags);
 216         if (ipu_crtc->page_flip_event)
 217                 drm_send_vblank_event(drm, -1, ipu_crtc->page_flip_event);
 218         ipu_crtc->page_flip_event = NULL;
 219         imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
 220         spin_unlock_irqrestore(&drm->event_lock, flags);
 221 }
 222
 223 static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
 224 {
 225         struct ipu_crtc *ipu_crtc = dev_id;
 226
 227         imx_drm_handle_vblank(ipu_crtc->imx_crtc);
 228
 229         if (ipu_crtc->newfb) {
 230                 struct ipu_plane *plane = ipu_crtc->plane[0];
 231
 232                 ipu_crtc->newfb = NULL;
 233                 ipu_plane_set_base(plane, ipu_crtc->base.primary->fb,
 234                                    plane->x, plane->y);
 235                 ipu_crtc_handle_pageflip(ipu_crtc);
 236         }
 237
 238         return IRQ_HANDLED;
 239 }
 240
 241 static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
 242                                   const struct drm_display_mode *mode,
 243                                   struct drm_display_mode *adjusted_mode)
 244 {
 245         return true;
 246 }
 247
 248 static void ipu_crtc_prepare(struct drm_crtc *crtc)
 249 {
 250         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 251
 252         ipu_fb_disable(ipu_crtc);
 253 }
 254
 255 static void ipu_crtc_commit(struct drm_crtc *crtc)
 256 {
 257         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 258
 259         ipu_fb_enable(ipu_crtc);
 260 }
 261
 262 static struct drm_crtc_helper_funcs ipu_helper_funcs = {
 263         .dpms = ipu_crtc_dpms,
 264         .mode_fixup = ipu_crtc_mode_fixup,
 265         .mode_set = ipu_crtc_mode_set,
 266         .prepare = ipu_crtc_prepare,
 267         .commit = ipu_crtc_commit,
 268 };
 269
 270 static int ipu_enable_vblank(struct drm_crtc *crtc)
 271 {
 272         return 0;
 273 }
 274
 275 static void ipu_disable_vblank(struct drm_crtc *crtc)
 276 {
 277         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 278
 279         ipu_crtc->page_flip_event = NULL;
 280         ipu_crtc->newfb = NULL;
 281 }
 282
 283 static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
 284                 u32 pixfmt, int hsync_pin, int vsync_pin)
 285 {
 286         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 287
 288         ipu_crtc->interface_pix_fmt = pixfmt;
 289         ipu_crtc->di_hsync_pin = hsync_pin;
 290         ipu_crtc->di_vsync_pin = vsync_pin;
 291
 292         switch (encoder_type) {
 293         case DRM_MODE_ENCODER_DAC:
 294         case DRM_MODE_ENCODER_TVDAC:
 295         case DRM_MODE_ENCODER_LVDS:
 296                 ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
 297                         IPU_DI_CLKMODE_EXT;
 298                 break;
 299         case DRM_MODE_ENCODER_TMDS:
 300         case DRM_MODE_ENCODER_NONE:
 301                 ipu_crtc->di_clkflags = 0;
 302                 break;
 303         }
 304
 305         return 0;
 306 }
 307
 308 static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs = {
 309         .enable_vblank = ipu_enable_vblank,
 310         .disable_vblank = ipu_disable_vblank,
 311         .set_interface_pix_fmt = ipu_set_interface_pix_fmt,
 312         .crtc_funcs = &ipu_crtc_funcs,
 313         .crtc_helper_funcs = &ipu_helper_funcs,
 314 };
 315
 316 static void ipu_put_resources(struct ipu_crtc *ipu_crtc)
 317 {
 318         if (!IS_ERR_OR_NULL(ipu_crtc->dc))
 319                 ipu_dc_put(ipu_crtc->dc);
 320         if (!IS_ERR_OR_NULL(ipu_crtc->di))
 321                 ipu_di_put(ipu_crtc->di);
 322 }
 323
 324 static int ipu_get_resources(struct ipu_crtc *ipu_crtc,
 325                 struct ipu_client_platformdata *pdata)
 326 {
 327         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
 328         int ret;
 329
 330         ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
 331         if (IS_ERR(ipu_crtc->dc)) {
 332                 ret = PTR_ERR(ipu_crtc->dc);
 333                 goto err_out;
 334         }
 335
 336         ipu_crtc->di = ipu_di_get(ipu, pdata->di);
 337         if (IS_ERR(ipu_crtc->di)) {
 338                 ret = PTR_ERR(ipu_crtc->di);
 339                 goto err_out;
 340         }
 341
 342         return 0;
 343 err_out:
 344         ipu_put_resources(ipu_crtc);
 345
 346         return ret;
 347 }
 348
 349 static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
 350         struct ipu_client_platformdata *pdata, struct drm_device *drm)
 351 {
 352         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
 353         int dp = -EINVAL;
 354         int ret;
 355         int id;
 356
 357         ret = ipu_get_resources(ipu_crtc, pdata);
 358         if (ret) {
 359                 dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
 360                                 ret);
 361                 return ret;
 362         }
 363
 364         ret = imx_drm_add_crtc(drm, &ipu_crtc->base, &ipu_crtc->imx_crtc,
 365                         &ipu_crtc_helper_funcs, ipu_crtc->dev->of_node);
 366         if (ret) {
 367                 dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
 368                 goto err_put_resources;
 369         }
 370
 371         if (pdata->dp >= 0)
 372                 dp = IPU_DP_FLOW_SYNC_BG;
 373         id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
 374         ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
 375                                             pdata->dma[0], dp, BIT(id), true);
 376         ret = ipu_plane_get_resources(ipu_crtc->plane[0]);
 377         if (ret) {
 378                 dev_err(ipu_crtc->dev, "getting plane 0 resources failed with %d.\n",
 379                         ret);
 380                 goto err_remove_crtc;
 381         }
 382
 383         /* If this crtc is using the DP, add an overlay plane */
 384         if (pdata->dp >= 0 && pdata->dma[1] > 0) {
 385                 ipu_crtc->plane[1] = ipu_plane_init(ipu_crtc->base.dev, ipu,
 386                                                     pdata->dma[1],
 387                                                     IPU_DP_FLOW_SYNC_FG,
 388                                                     BIT(id), false);
 389                 if (IS_ERR(ipu_crtc->plane[1]))
 390                         ipu_crtc->plane[1] = NULL;
 391         }
 392
 393         ipu_crtc->irq = ipu_plane_irq(ipu_crtc->plane[0]);
 394         ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
 395                         "imx_drm", ipu_crtc);
 396         if (ret < 0) {
 397                 dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
 398                 goto err_put_plane_res;
 399         }
 400
 401         return 0;
 402
 403 err_put_plane_res:
 404         ipu_plane_put_resources(ipu_crtc->plane[0]);
 405 err_remove_crtc:
 406         imx_drm_remove_crtc(ipu_crtc->imx_crtc);
 407 err_put_resources:
 408         ipu_put_resources(ipu_crtc);
 409
 410         return ret;
 411 }
 412
 413 static struct device_node *ipu_drm_get_port_by_id(struct device_node *parent,
 414                                                   int port_id)
 415 {
 416         struct device_node *port;
 417         int id, ret;
 418
 419         port = of_get_child_by_name(parent, "port");
 420         while (port) {
 421                 ret = of_property_read_u32(port, "reg", &id);
 422                 if (!ret && id == port_id)
 423                         return port;
 424
 425                 do {
 426                         port = of_get_next_child(parent, port);
 427                         if (!port)
 428                                 return NULL;
 429                 } while (of_node_cmp(port->name, "port"));
 430         }
 431
 432         return NULL;
 433 }
 434
 435 static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
 436 {
 437         struct ipu_client_platformdata *pdata = dev->platform_data;
 438         struct drm_device *drm = data;
 439         struct ipu_crtc *ipu_crtc;
 440         int ret;
 441
 442         ipu_crtc = devm_kzalloc(dev, sizeof(*ipu_crtc), GFP_KERNEL);
 443         if (!ipu_crtc)
 444                 return -ENOMEM;
 445
 446         ipu_crtc->dev = dev;
 447
 448         ret = ipu_crtc_init(ipu_crtc, pdata, drm);
 449         if (ret)
 450                 return ret;
 451
 452         dev_set_drvdata(dev, ipu_crtc);
 453
 454         return 0;
 455 }
 456
 457 static void ipu_drm_unbind(struct device *dev, struct device *master,
 458         void *data)
 459 {
 460         struct ipu_crtc *ipu_crtc = dev_get_drvdata(dev);
 461
 462         imx_drm_remove_crtc(ipu_crtc->imx_crtc);
 463
 464         ipu_plane_put_resources(ipu_crtc->plane[0]);
 465         ipu_put_resources(ipu_crtc);
 466 }
 467
 468 static const struct component_ops ipu_crtc_ops = {
 469         .bind = ipu_drm_bind,
 470         .unbind = ipu_drm_unbind,
 471 };
 472
 473 static int ipu_drm_probe(struct platform_device *pdev)
 474 {
 475         struct device *dev = &pdev->dev;
 476         struct ipu_client_platformdata *pdata = dev->platform_data;
 477         int ret;
 478
 479         if (!dev->platform_data)
 480                 return -EINVAL;
 481
 482         if (!dev->of_node) {
 483                 /* Associate crtc device with the corresponding DI port node */
 484                 dev->of_node = ipu_drm_get_port_by_id(dev->parent->of_node,
 485                                                       pdata->di + 2);
 486                 if (!dev->of_node) {
 487                         dev_err(dev, "missing port@%d node in %s\n",
 488                                 pdata->di + 2, dev->parent->of_node->full_name);
 489                         return -ENODEV;
 490                 }
 491         }
 492
 493         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 494         if (ret)
 495                 return ret;
 496
 497         return component_add(dev, &ipu_crtc_ops);
 498 }
 499
 500 static int ipu_drm_remove(struct platform_device *pdev)
 501 {
 502         component_del(&pdev->dev, &ipu_crtc_ops);
 503         return 0;
 504 }
 505
 506 static struct platform_driver ipu_drm_driver = {
 507         .driver = {
 508                 .name = "imx-ipuv3-crtc",
 509         },
 510         .probe = ipu_drm_probe,
 511         .remove = ipu_drm_remove,
 512 };
 513 module_platform_driver(ipu_drm_driver);
 514
 515 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 516 MODULE_DESCRIPTION(DRIVER_DESC);
 517 MODULE_LICENSE("GPL");
 518 MODULE_ALIAS("platform:imx-ipuv3-crtc");