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