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/module.h>
  21 #include <linux/export.h>
  22 #include <linux/device.h>
  23 #include <linux/platform_device.h>
  24 #include <drm/drmP.h>
  25 #include <drm/drm_crtc_helper.h>
  26 #include <linux/fb.h>
  27 #include <linux/clk.h>
  28 #include <linux/errno.h>
  29 #include <drm/drm_gem_cma_helper.h>
  30 #include <drm/drm_fb_cma_helper.h>
  31
  32 #include "ipu-v3/imx-ipu-v3.h"
  33 #include "imx-drm.h"
  34 #include "ipuv3-plane.h"
  35
  36 #define DRIVER_DESC             "i.MX IPUv3 Graphics"
  37
  38 struct ipu_crtc {
  39         struct device           *dev;
  40         struct drm_crtc         base;
  41         struct imx_drm_crtc     *imx_crtc;
  42
  43         /* plane[0] is the full plane, plane[1] is the partial plane */
  44         struct ipu_plane        *plane[2];
  45
  46         struct ipu_dc           *dc;
  47         struct ipu_di           *di;
  48         int                     enabled;
  49         struct drm_pending_vblank_event *page_flip_event;
  50         struct drm_framebuffer  *newfb;
  51         int                     irq;
  52         u32                     interface_pix_fmt;
  53         unsigned long           di_clkflags;
  54         int                     di_hsync_pin;
  55         int                     di_vsync_pin;
  56 };
  57
  58 #define to_ipu_crtc(x) container_of(x, struct ipu_crtc, base)
  59
  60 static void ipu_fb_enable(struct ipu_crtc *ipu_crtc)
  61 {
  62         if (ipu_crtc->enabled)
  63                 return;
  64
  65         ipu_di_enable(ipu_crtc->di);
  66         ipu_dc_enable_channel(ipu_crtc->dc);
  67         ipu_plane_enable(ipu_crtc->plane[0]);
  68
  69         ipu_crtc->enabled = 1;
  70 }
  71
  72 static void ipu_fb_disable(struct ipu_crtc *ipu_crtc)
  73 {
  74         if (!ipu_crtc->enabled)
  75                 return;
  76
  77         ipu_plane_disable(ipu_crtc->plane[0]);
  78         ipu_dc_disable_channel(ipu_crtc->dc);
  79         ipu_di_disable(ipu_crtc->di);
  80
  81         ipu_crtc->enabled = 0;
  82 }
  83
  84 static void ipu_crtc_dpms(struct drm_crtc *crtc, int mode)
  85 {
  86         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
  87
  88         dev_dbg(ipu_crtc->dev, "%s mode: %d\n", __func__, mode);
  89
  90         switch (mode) {
  91         case DRM_MODE_DPMS_ON:
  92                 ipu_fb_enable(ipu_crtc);
  93                 break;
  94         case DRM_MODE_DPMS_STANDBY:
  95         case DRM_MODE_DPMS_SUSPEND:
  96         case DRM_MODE_DPMS_OFF:
  97                 ipu_fb_disable(ipu_crtc);
  98                 break;
  99         }
 100 }
 101
 102 static int ipu_page_flip(struct drm_crtc *crtc,
 103                 struct drm_framebuffer *fb,
 104                 struct drm_pending_vblank_event *event,
 105                 uint32_t page_flip_flags)
 106 {
 107         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 108         int ret;
 109
 110         if (ipu_crtc->newfb)
 111                 return -EBUSY;
 112
 113         ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
 114         if (ret) {
 115                 dev_dbg(ipu_crtc->dev, "failed to acquire vblank counter\n");
 116                 list_del(&event->base.link);
 117
 118                 return ret;
 119         }
 120
 121         ipu_crtc->newfb = fb;
 122         ipu_crtc->page_flip_event = event;
 123         crtc->fb = fb;
 124
 125         return 0;
 126 }
 127
 128 static const struct drm_crtc_funcs ipu_crtc_funcs = {
 129         .set_config = drm_crtc_helper_set_config,
 130         .destroy = drm_crtc_cleanup,
 131         .page_flip = ipu_page_flip,
 132 };
 133
 134 static int ipu_crtc_mode_set(struct drm_crtc *crtc,
 135                                struct drm_display_mode *orig_mode,
 136                                struct drm_display_mode *mode,
 137                                int x, int y,
 138                                struct drm_framebuffer *old_fb)
 139 {
 140         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 141         int ret;
 142         struct ipu_di_signal_cfg sig_cfg = {};
 143         u32 out_pixel_fmt;
 144
 145         dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
 146                         mode->hdisplay);
 147         dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
 148                         mode->vdisplay);
 149
 150         out_pixel_fmt = ipu_crtc->interface_pix_fmt;
 151
 152         if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 153                 sig_cfg.interlaced = 1;
 154         if (mode->flags & DRM_MODE_FLAG_PHSYNC)
 155                 sig_cfg.Hsync_pol = 1;
 156         if (mode->flags & DRM_MODE_FLAG_PVSYNC)
 157                 sig_cfg.Vsync_pol = 1;
 158
 159         sig_cfg.enable_pol = 1;
 160         sig_cfg.clk_pol = 1;
 161         sig_cfg.width = mode->hdisplay;
 162         sig_cfg.height = mode->vdisplay;
 163         sig_cfg.pixel_fmt = out_pixel_fmt;
 164         sig_cfg.h_start_width = mode->htotal - mode->hsync_end;
 165         sig_cfg.h_sync_width = mode->hsync_end - mode->hsync_start;
 166         sig_cfg.h_end_width = mode->hsync_start - mode->hdisplay;
 167
 168         sig_cfg.v_start_width = mode->vtotal - mode->vsync_end;
 169         sig_cfg.v_sync_width = mode->vsync_end - mode->vsync_start;
 170         sig_cfg.v_end_width = mode->vsync_start - mode->vdisplay;
 171         sig_cfg.pixelclock = mode->clock * 1000;
 172         sig_cfg.clkflags = ipu_crtc->di_clkflags;
 173
 174         sig_cfg.v_to_h_sync = 0;
 175
 176         sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
 177         sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
 178
 179         ret = ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di, sig_cfg.interlaced,
 180                         out_pixel_fmt, mode->hdisplay);
 181         if (ret) {
 182                 dev_err(ipu_crtc->dev,
 183                                 "initializing display controller failed with %d\n",
 184                                 ret);
 185                 return ret;
 186         }
 187
 188         ret = ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
 189         if (ret) {
 190                 dev_err(ipu_crtc->dev,
 191                                 "initializing panel failed with %d\n", ret);
 192                 return ret;
 193         }
 194
 195         return ipu_plane_mode_set(ipu_crtc->plane[0], crtc, mode, crtc->fb,
 196                                   0, 0, mode->hdisplay, mode->vdisplay,
 197                                   x, y, mode->hdisplay, mode->vdisplay);
 198 }
 199
 200 static void ipu_crtc_handle_pageflip(struct ipu_crtc *ipu_crtc)
 201 {
 202         unsigned long flags;
 203         struct drm_device *drm = ipu_crtc->base.dev;
 204
 205         spin_lock_irqsave(&drm->event_lock, flags);
 206         if (ipu_crtc->page_flip_event)
 207                 drm_send_vblank_event(drm, -1, ipu_crtc->page_flip_event);
 208         ipu_crtc->page_flip_event = NULL;
 209         imx_drm_crtc_vblank_put(ipu_crtc->imx_crtc);
 210         spin_unlock_irqrestore(&drm->event_lock, flags);
 211 }
 212
 213 static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
 214 {
 215         struct ipu_crtc *ipu_crtc = dev_id;
 216
 217         imx_drm_handle_vblank(ipu_crtc->imx_crtc);
 218
 219         if (ipu_crtc->newfb) {
 220                 ipu_crtc->newfb = NULL;
 221                 ipu_plane_set_base(ipu_crtc->plane[0], ipu_crtc->base.fb, 0, 0);
 222                 ipu_crtc_handle_pageflip(ipu_crtc);
 223         }
 224
 225         return IRQ_HANDLED;
 226 }
 227
 228 static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
 229                                   const struct drm_display_mode *mode,
 230                                   struct drm_display_mode *adjusted_mode)
 231 {
 232         return true;
 233 }
 234
 235 static void ipu_crtc_prepare(struct drm_crtc *crtc)
 236 {
 237         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 238
 239         ipu_fb_disable(ipu_crtc);
 240 }
 241
 242 static void ipu_crtc_commit(struct drm_crtc *crtc)
 243 {
 244         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 245
 246         ipu_fb_enable(ipu_crtc);
 247 }
 248
 249 static struct drm_crtc_helper_funcs ipu_helper_funcs = {
 250         .dpms = ipu_crtc_dpms,
 251         .mode_fixup = ipu_crtc_mode_fixup,
 252         .mode_set = ipu_crtc_mode_set,
 253         .prepare = ipu_crtc_prepare,
 254         .commit = ipu_crtc_commit,
 255 };
 256
 257 static int ipu_enable_vblank(struct drm_crtc *crtc)
 258 {
 259         return 0;
 260 }
 261
 262 static void ipu_disable_vblank(struct drm_crtc *crtc)
 263 {
 264         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 265
 266         ipu_crtc->page_flip_event = NULL;
 267         ipu_crtc->newfb = NULL;
 268 }
 269
 270 static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,
 271                 u32 pixfmt, int hsync_pin, int vsync_pin)
 272 {
 273         struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
 274
 275         ipu_crtc->interface_pix_fmt = pixfmt;
 276         ipu_crtc->di_hsync_pin = hsync_pin;
 277         ipu_crtc->di_vsync_pin = vsync_pin;
 278
 279         switch (encoder_type) {
 280         case DRM_MODE_ENCODER_DAC:
 281         case DRM_MODE_ENCODER_TVDAC:
 282         case DRM_MODE_ENCODER_LVDS:
 283                 ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |
 284                         IPU_DI_CLKMODE_EXT;
 285                 break;
 286         case DRM_MODE_ENCODER_NONE:
 287                 ipu_crtc->di_clkflags = 0;
 288                 break;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static const struct imx_drm_crtc_helper_funcs ipu_crtc_helper_funcs = {
 295         .enable_vblank = ipu_enable_vblank,
 296         .disable_vblank = ipu_disable_vblank,
 297         .set_interface_pix_fmt = ipu_set_interface_pix_fmt,
 298         .crtc_funcs = &ipu_crtc_funcs,
 299         .crtc_helper_funcs = &ipu_helper_funcs,
 300 };
 301
 302 static void ipu_put_resources(struct ipu_crtc *ipu_crtc)
 303 {
 304         if (!IS_ERR_OR_NULL(ipu_crtc->dc))
 305                 ipu_dc_put(ipu_crtc->dc);
 306         if (!IS_ERR_OR_NULL(ipu_crtc->di))
 307                 ipu_di_put(ipu_crtc->di);
 308 }
 309
 310 static int ipu_get_resources(struct ipu_crtc *ipu_crtc,
 311                 struct ipu_client_platformdata *pdata)
 312 {
 313         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
 314         int ret;
 315
 316         ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
 317         if (IS_ERR(ipu_crtc->dc)) {
 318                 ret = PTR_ERR(ipu_crtc->dc);
 319                 goto err_out;
 320         }
 321
 322         ipu_crtc->di = ipu_di_get(ipu, pdata->di);
 323         if (IS_ERR(ipu_crtc->di)) {
 324                 ret = PTR_ERR(ipu_crtc->di);
 325                 goto err_out;
 326         }
 327
 328         return 0;
 329 err_out:
 330         ipu_put_resources(ipu_crtc);
 331
 332         return ret;
 333 }
 334
 335 static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
 336                 struct ipu_client_platformdata *pdata)
 337 {
 338         struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
 339         int dp = -EINVAL;
 340         int ret;
 341         int id;
 342
 343         ret = ipu_get_resources(ipu_crtc, pdata);
 344         if (ret) {
 345                 dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
 346                                 ret);
 347                 return ret;
 348         }
 349
 350         ret = imx_drm_add_crtc(&ipu_crtc->base,
 351                         &ipu_crtc->imx_crtc,
 352                         &ipu_crtc_helper_funcs, THIS_MODULE,
 353                         ipu_crtc->dev->parent->of_node, pdata->di);
 354         if (ret) {
 355                 dev_err(ipu_crtc->dev, "adding crtc failed with %d.\n", ret);
 356                 goto err_put_resources;
 357         }
 358
 359         if (pdata->dp >= 0)
 360                 dp = IPU_DP_FLOW_SYNC_BG;
 361         id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
 362         ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
 363                                             pdata->dma[0], dp, BIT(id), true);
 364         ret = ipu_plane_get_resources(ipu_crtc->plane[0]);
 365         if (ret) {
 366                 dev_err(ipu_crtc->dev, "getting plane 0 resources failed with %d.\n",
 367                         ret);
 368                 goto err_remove_crtc;
 369         }
 370
 371         /* If this crtc is using the DP, add an overlay plane */
 372         if (pdata->dp >= 0 && pdata->dma[1] > 0) {
 373                 ipu_crtc->plane[1] = ipu_plane_init(ipu_crtc->base.dev, ipu,
 374                                                     pdata->dma[1],
 375                                                     IPU_DP_FLOW_SYNC_FG,
 376                                                     BIT(id), false);
 377                 if (IS_ERR(ipu_crtc->plane[1]))
 378                         ipu_crtc->plane[1] = NULL;
 379         }
 380
 381         ipu_crtc->irq = ipu_plane_irq(ipu_crtc->plane[0]);
 382         ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
 383                         "imx_drm", ipu_crtc);
 384         if (ret < 0) {
 385                 dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
 386                 goto err_put_plane_res;
 387         }
 388
 389         return 0;
 390
 391 err_put_plane_res:
 392         ipu_plane_put_resources(ipu_crtc->plane[0]);
 393 err_remove_crtc:
 394         imx_drm_remove_crtc(ipu_crtc->imx_crtc);
 395 err_put_resources:
 396         ipu_put_resources(ipu_crtc);
 397
 398         return ret;
 399 }
 400
 401 static int ipu_drm_probe(struct platform_device *pdev)
 402 {
 403         struct ipu_client_platformdata *pdata = pdev->dev.platform_data;
 404         struct ipu_crtc *ipu_crtc;
 405         int ret;
 406
 407         if (!pdata)
 408                 return -EINVAL;
 409
 410         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 411
 412         ipu_crtc = devm_kzalloc(&pdev->dev, sizeof(*ipu_crtc), GFP_KERNEL);
 413         if (!ipu_crtc)
 414                 return -ENOMEM;
 415
 416         ipu_crtc->dev = &pdev->dev;
 417
 418         ret = ipu_crtc_init(ipu_crtc, pdata);
 419         if (ret)
 420                 return ret;
 421
 422         platform_set_drvdata(pdev, ipu_crtc);
 423
 424         return 0;
 425 }
 426
 427 static int ipu_drm_remove(struct platform_device *pdev)
 428 {
 429         struct ipu_crtc *ipu_crtc = platform_get_drvdata(pdev);
 430
 431         imx_drm_remove_crtc(ipu_crtc->imx_crtc);
 432
 433         ipu_plane_put_resources(ipu_crtc->plane[0]);
 434         ipu_put_resources(ipu_crtc);
 435
 436         return 0;
 437 }
 438
 439 static struct platform_driver ipu_drm_driver = {
 440         .driver = {
 441                 .name = "imx-ipuv3-crtc",
 442         },
 443         .probe = ipu_drm_probe,
 444         .remove = ipu_drm_remove,
 445 };
 446 module_platform_driver(ipu_drm_driver);
 447
 448 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 449 MODULE_DESCRIPTION(DRIVER_DESC);
 450 MODULE_LICENSE("GPL");
 451 MODULE_ALIAS("platform:imx-ipuv3-crtc");