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