drivers/gpu/drm/exynos/exynos_drm_rotator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2012 Samsung Electronics Co.Ltd
   4  * Authors:
   5  *      YoungJun Cho <yj44.cho@samsung.com>
   6  *      Eunchul Kim <chulspro.kim@samsung.com>
   7  */
   8
   9 #include <linux/clk.h>
  10 #include <linux/component.h>
  11 #include <linux/err.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/io.h>
  14 #include <linux/kernel.h>
  15 #include <linux/of_device.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/sizes.h>
  19
  20 #include <drm/drm_fourcc.h>
  21 #include <drm/exynos_drm.h>
  22
  23 #include "exynos_drm_drv.h"
  24 #include "exynos_drm_ipp.h"
  25 #include "regs-rotator.h"
  26
  27 /*
  28  * Rotator supports image crop/rotator and input/output DMA operations.
  29  * input DMA reads image data from the memory.
  30  * output DMA writes image data to memory.
  31  */
  32
  33 #define ROTATOR_AUTOSUSPEND_DELAY       2000
  34
  35 #define rot_read(offset)        readl(rot->regs + (offset))
  36 #define rot_write(cfg, offset)  writel(cfg, rot->regs + (offset))
  37
  38 enum rot_irq_status {
  39         ROT_IRQ_STATUS_COMPLETE = 8,
  40         ROT_IRQ_STATUS_ILLEGAL  = 9,
  41 };
  42
  43 struct rot_variant {
  44         const struct exynos_drm_ipp_formats *formats;
  45         unsigned int    num_formats;
  46 };
  47
  48 /*
  49  * A structure of rotator context.
  50  * @ippdrv: prepare initialization using ippdrv.
  51  * @regs: memory mapped io registers.
  52  * @clock: rotator gate clock.
  53  * @limit_tbl: limitation of rotator.
  54  * @irq: irq number.
  55  */
  56 struct rot_context {
  57         struct exynos_drm_ipp ipp;
  58         struct drm_device *drm_dev;
  59         void            *dma_priv;
  60         struct device   *dev;
  61         void __iomem    *regs;
  62         struct clk      *clock;
  63         const struct exynos_drm_ipp_formats *formats;
  64         unsigned int    num_formats;
  65         struct exynos_drm_ipp_task      *task;
  66 };
  67
  68 static void rotator_reg_set_irq(struct rot_context *rot, bool enable)
  69 {
  70         u32 val = rot_read(ROT_CONFIG);
  71
  72         if (enable == true)
  73                 val |= ROT_CONFIG_IRQ;
  74         else
  75                 val &= ~ROT_CONFIG_IRQ;
  76
  77         rot_write(val, ROT_CONFIG);
  78 }
  79
  80 static enum rot_irq_status rotator_reg_get_irq_status(struct rot_context *rot)
  81 {
  82         u32 val = rot_read(ROT_STATUS);
  83
  84         val = ROT_STATUS_IRQ(val);
  85
  86         if (val == ROT_STATUS_IRQ_VAL_COMPLETE)
  87                 return ROT_IRQ_STATUS_COMPLETE;
  88
  89         return ROT_IRQ_STATUS_ILLEGAL;
  90 }
  91
  92 static irqreturn_t rotator_irq_handler(int irq, void *arg)
  93 {
  94         struct rot_context *rot = arg;
  95         enum rot_irq_status irq_status;
  96         u32 val;
  97
  98         /* Get execution result */
  99         irq_status = rotator_reg_get_irq_status(rot);
 100
 101         /* clear status */
 102         val = rot_read(ROT_STATUS);
 103         val |= ROT_STATUS_IRQ_PENDING((u32)irq_status);
 104         rot_write(val, ROT_STATUS);
 105
 106         if (rot->task) {
 107                 struct exynos_drm_ipp_task *task = rot->task;
 108
 109                 rot->task = NULL;
 110                 pm_runtime_mark_last_busy(rot->dev);
 111                 pm_runtime_put_autosuspend(rot->dev);
 112                 exynos_drm_ipp_task_done(task,
 113                         irq_status == ROT_IRQ_STATUS_COMPLETE ? 0 : -EINVAL);
 114         }
 115
 116         return IRQ_HANDLED;
 117 }
 118
 119 static void rotator_src_set_fmt(struct rot_context *rot, u32 fmt)
 120 {
 121         u32 val;
 122
 123         val = rot_read(ROT_CONTROL);
 124         val &= ~ROT_CONTROL_FMT_MASK;
 125
 126         switch (fmt) {
 127         case DRM_FORMAT_NV12:
 128                 val |= ROT_CONTROL_FMT_YCBCR420_2P;
 129                 break;
 130         case DRM_FORMAT_XRGB8888:
 131                 val |= ROT_CONTROL_FMT_RGB888;
 132                 break;
 133         }
 134
 135         rot_write(val, ROT_CONTROL);
 136 }
 137
 138 static void rotator_src_set_buf(struct rot_context *rot,
 139                                 struct exynos_drm_ipp_buffer *buf)
 140 {
 141         u32 val;
 142
 143         /* Set buffer size configuration */
 144         val = ROT_SET_BUF_SIZE_H(buf->buf.height) |
 145               ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]);
 146         rot_write(val, ROT_SRC_BUF_SIZE);
 147
 148         /* Set crop image position configuration */
 149         val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x);
 150         rot_write(val, ROT_SRC_CROP_POS);
 151         val = ROT_SRC_CROP_SIZE_H(buf->rect.h) |
 152               ROT_SRC_CROP_SIZE_W(buf->rect.w);
 153         rot_write(val, ROT_SRC_CROP_SIZE);
 154
 155         /* Set buffer DMA address */
 156         rot_write(buf->dma_addr[0], ROT_SRC_BUF_ADDR(0));
 157         rot_write(buf->dma_addr[1], ROT_SRC_BUF_ADDR(1));
 158 }
 159
 160 static void rotator_dst_set_transf(struct rot_context *rot,
 161                                    unsigned int rotation)
 162 {
 163         u32 val;
 164
 165         /* Set transform configuration */
 166         val = rot_read(ROT_CONTROL);
 167         val &= ~ROT_CONTROL_FLIP_MASK;
 168
 169         if (rotation & DRM_MODE_REFLECT_X)
 170                 val |= ROT_CONTROL_FLIP_VERTICAL;
 171         if (rotation & DRM_MODE_REFLECT_Y)
 172                 val |= ROT_CONTROL_FLIP_HORIZONTAL;
 173
 174         val &= ~ROT_CONTROL_ROT_MASK;
 175
 176         if (rotation & DRM_MODE_ROTATE_90)
 177                 val |= ROT_CONTROL_ROT_90;
 178         else if (rotation & DRM_MODE_ROTATE_180)
 179                 val |= ROT_CONTROL_ROT_180;
 180         else if (rotation & DRM_MODE_ROTATE_270)
 181                 val |= ROT_CONTROL_ROT_270;
 182
 183         rot_write(val, ROT_CONTROL);
 184 }
 185
 186 static void rotator_dst_set_buf(struct rot_context *rot,
 187                                 struct exynos_drm_ipp_buffer *buf)
 188 {
 189         u32 val;
 190
 191         /* Set buffer size configuration */
 192         val = ROT_SET_BUF_SIZE_H(buf->buf.height) |
 193               ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]);
 194         rot_write(val, ROT_DST_BUF_SIZE);
 195
 196         /* Set crop image position configuration */
 197         val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x);
 198         rot_write(val, ROT_DST_CROP_POS);
 199
 200         /* Set buffer DMA address */
 201         rot_write(buf->dma_addr[0], ROT_DST_BUF_ADDR(0));
 202         rot_write(buf->dma_addr[1], ROT_DST_BUF_ADDR(1));
 203 }
 204
 205 static void rotator_start(struct rot_context *rot)
 206 {
 207         u32 val;
 208
 209         /* Set interrupt enable */
 210         rotator_reg_set_irq(rot, true);
 211
 212         val = rot_read(ROT_CONTROL);
 213         val |= ROT_CONTROL_START;
 214         rot_write(val, ROT_CONTROL);
 215 }
 216
 217 static int rotator_commit(struct exynos_drm_ipp *ipp,
 218                           struct exynos_drm_ipp_task *task)
 219 {
 220         struct rot_context *rot =
 221                         container_of(ipp, struct rot_context, ipp);
 222         int ret;
 223
 224         ret = pm_runtime_resume_and_get(rot->dev);
 225         if (ret < 0) {
 226                 dev_err(rot->dev, "failed to enable ROTATOR device.\n");
 227                 return ret;
 228         }
 229         rot->task = task;
 230
 231         rotator_src_set_fmt(rot, task->src.buf.fourcc);
 232         rotator_src_set_buf(rot, &task->src);
 233         rotator_dst_set_transf(rot, task->transform.rotation);
 234         rotator_dst_set_buf(rot, &task->dst);
 235         rotator_start(rot);
 236
 237         return 0;
 238 }
 239
 240 static const struct exynos_drm_ipp_funcs ipp_funcs = {
 241         .commit = rotator_commit,
 242 };
 243
 244 static int rotator_bind(struct device *dev, struct device *master, void *data)
 245 {
 246         struct rot_context *rot = dev_get_drvdata(dev);
 247         struct drm_device *drm_dev = data;
 248         struct exynos_drm_ipp *ipp = &rot->ipp;
 249
 250         rot->drm_dev = drm_dev;
 251         ipp->drm_dev = drm_dev;
 252         exynos_drm_register_dma(drm_dev, dev, &rot->dma_priv);
 253
 254         exynos_drm_ipp_register(dev, ipp, &ipp_funcs,
 255                            DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE,
 256                            rot->formats, rot->num_formats, "rotator");
 257
 258         dev_info(dev, "The exynos rotator has been probed successfully\n");
 259
 260         return 0;
 261 }
 262
 263 static void rotator_unbind(struct device *dev, struct device *master,
 264                         void *data)
 265 {
 266         struct rot_context *rot = dev_get_drvdata(dev);
 267         struct exynos_drm_ipp *ipp = &rot->ipp;
 268
 269         exynos_drm_ipp_unregister(dev, ipp);
 270         exynos_drm_unregister_dma(rot->drm_dev, rot->dev, &rot->dma_priv);
 271 }
 272
 273 static const struct component_ops rotator_component_ops = {
 274         .bind   = rotator_bind,
 275         .unbind = rotator_unbind,
 276 };
 277
 278 static int rotator_probe(struct platform_device *pdev)
 279 {
 280         struct device *dev = &pdev->dev;
 281         struct rot_context *rot;
 282         const struct rot_variant *variant;
 283         int irq;
 284         int ret;
 285
 286         rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL);
 287         if (!rot)
 288                 return -ENOMEM;
 289
 290         variant = of_device_get_match_data(dev);
 291         rot->formats = variant->formats;
 292         rot->num_formats = variant->num_formats;
 293         rot->dev = dev;
 294         rot->regs = devm_platform_ioremap_resource(pdev, 0);
 295         if (IS_ERR(rot->regs))
 296                 return PTR_ERR(rot->regs);
 297
 298         irq = platform_get_irq(pdev, 0);
 299         if (irq < 0)
 300                 return irq;
 301
 302         ret = devm_request_irq(dev, irq, rotator_irq_handler, 0, dev_name(dev),
 303                                rot);
 304         if (ret < 0) {
 305                 dev_err(dev, "failed to request irq\n");
 306                 return ret;
 307         }
 308
 309         rot->clock = devm_clk_get(dev, "rotator");
 310         if (IS_ERR(rot->clock)) {
 311                 dev_err(dev, "failed to get clock\n");
 312                 return PTR_ERR(rot->clock);
 313         }
 314
 315         pm_runtime_use_autosuspend(dev);
 316         pm_runtime_set_autosuspend_delay(dev, ROTATOR_AUTOSUSPEND_DELAY);
 317         pm_runtime_enable(dev);
 318         platform_set_drvdata(pdev, rot);
 319
 320         ret = component_add(dev, &rotator_component_ops);
 321         if (ret)
 322                 goto err_component;
 323
 324         return 0;
 325
 326 err_component:
 327         pm_runtime_dont_use_autosuspend(dev);
 328         pm_runtime_disable(dev);
 329         return ret;
 330 }
 331
 332 static int rotator_remove(struct platform_device *pdev)
 333 {
 334         struct device *dev = &pdev->dev;
 335
 336         component_del(dev, &rotator_component_ops);
 337         pm_runtime_dont_use_autosuspend(dev);
 338         pm_runtime_disable(dev);
 339
 340         return 0;
 341 }
 342
 343 #ifdef CONFIG_PM
 344 static int rotator_runtime_suspend(struct device *dev)
 345 {
 346         struct rot_context *rot = dev_get_drvdata(dev);
 347
 348         clk_disable_unprepare(rot->clock);
 349         return 0;
 350 }
 351
 352 static int rotator_runtime_resume(struct device *dev)
 353 {
 354         struct rot_context *rot = dev_get_drvdata(dev);
 355
 356         return clk_prepare_enable(rot->clock);
 357 }
 358 #endif
 359
 360 static const struct drm_exynos_ipp_limit rotator_s5pv210_rbg888_limits[] = {
 361         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) },
 362         { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
 363 };
 364
 365 static const struct drm_exynos_ipp_limit rotator_4210_rbg888_limits[] = {
 366         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) },
 367         { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
 368 };
 369
 370 static const struct drm_exynos_ipp_limit rotator_4412_rbg888_limits[] = {
 371         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
 372         { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
 373 };
 374
 375 static const struct drm_exynos_ipp_limit rotator_5250_rbg888_limits[] = {
 376         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
 377         { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
 378 };
 379
 380 static const struct drm_exynos_ipp_limit rotator_s5pv210_yuv_limits[] = {
 381         { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) },
 382         { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
 383 };
 384
 385 static const struct drm_exynos_ipp_limit rotator_4210_yuv_limits[] = {
 386         { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) },
 387         { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
 388 };
 389
 390 static const struct drm_exynos_ipp_limit rotator_4412_yuv_limits[] = {
 391         { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_32K }, .v = { 32, SZ_32K }) },
 392         { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
 393 };
 394
 395 static const struct exynos_drm_ipp_formats rotator_s5pv210_formats[] = {
 396         { IPP_SRCDST_FORMAT(XRGB8888, rotator_s5pv210_rbg888_limits) },
 397         { IPP_SRCDST_FORMAT(NV12, rotator_s5pv210_yuv_limits) },
 398 };
 399
 400 static const struct exynos_drm_ipp_formats rotator_4210_formats[] = {
 401         { IPP_SRCDST_FORMAT(XRGB8888, rotator_4210_rbg888_limits) },
 402         { IPP_SRCDST_FORMAT(NV12, rotator_4210_yuv_limits) },
 403 };
 404
 405 static const struct exynos_drm_ipp_formats rotator_4412_formats[] = {
 406         { IPP_SRCDST_FORMAT(XRGB8888, rotator_4412_rbg888_limits) },
 407         { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
 408 };
 409
 410 static const struct exynos_drm_ipp_formats rotator_5250_formats[] = {
 411         { IPP_SRCDST_FORMAT(XRGB8888, rotator_5250_rbg888_limits) },
 412         { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
 413 };
 414
 415 static const struct rot_variant rotator_s5pv210_data = {
 416         .formats = rotator_s5pv210_formats,
 417         .num_formats = ARRAY_SIZE(rotator_s5pv210_formats),
 418 };
 419
 420 static const struct rot_variant rotator_4210_data = {
 421         .formats = rotator_4210_formats,
 422         .num_formats = ARRAY_SIZE(rotator_4210_formats),
 423 };
 424
 425 static const struct rot_variant rotator_4412_data = {
 426         .formats = rotator_4412_formats,
 427         .num_formats = ARRAY_SIZE(rotator_4412_formats),
 428 };
 429
 430 static const struct rot_variant rotator_5250_data = {
 431         .formats = rotator_5250_formats,
 432         .num_formats = ARRAY_SIZE(rotator_5250_formats),
 433 };
 434
 435 static const struct of_device_id exynos_rotator_match[] = {
 436         {
 437                 .compatible = "samsung,s5pv210-rotator",
 438                 .data = &rotator_s5pv210_data,
 439         }, {
 440                 .compatible = "samsung,exynos4210-rotator",
 441                 .data = &rotator_4210_data,
 442         }, {
 443                 .compatible = "samsung,exynos4212-rotator",
 444                 .data = &rotator_4412_data,
 445         }, {
 446                 .compatible = "samsung,exynos5250-rotator",
 447                 .data = &rotator_5250_data,
 448         }, {
 449         },
 450 };
 451 MODULE_DEVICE_TABLE(of, exynos_rotator_match);
 452
 453 static const struct dev_pm_ops rotator_pm_ops = {
 454         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 455                                 pm_runtime_force_resume)
 456         SET_RUNTIME_PM_OPS(rotator_runtime_suspend, rotator_runtime_resume,
 457                                                                         NULL)
 458 };
 459
 460 struct platform_driver rotator_driver = {
 461         .probe          = rotator_probe,
 462         .remove         = rotator_remove,
 463         .driver         = {
 464                 .name   = "exynos-rotator",
 465                 .owner  = THIS_MODULE,
 466                 .pm     = &rotator_pm_ops,
 467                 .of_match_table = exynos_rotator_match,
 468         },
 469 };