drivers/gpu/drm/exynos/exynos_drm_rotator.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics Co.Ltd
   3  * Authors:
   4  *      YoungJun Cho <yj44.cho@samsung.com>
   5  *      Eunchul Kim <chulspro.kim@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundationr
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/component.h>
  14 #include <linux/err.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/io.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/clk.h>
  19 #include <linux/of_device.h>
  20 #include <linux/pm_runtime.h>
  21
  22 #include <drm/drmP.h>
  23 #include <drm/exynos_drm.h>
  24 #include "regs-rotator.h"
  25 #include "exynos_drm_drv.h"
  26 #include "exynos_drm_iommu.h"
  27 #include "exynos_drm_ipp.h"
  28
  29 /*
  30  * Rotator supports image crop/rotator and input/output DMA operations.
  31  * input DMA reads image data from the memory.
  32  * output DMA writes image data to memory.
  33  */
  34
  35 #define ROTATOR_AUTOSUSPEND_DELAY       2000
  36
  37 #define rot_read(offset)        readl(rot->regs + (offset))
  38 #define rot_write(cfg, offset)  writel(cfg, rot->regs + (offset))
  39
  40 enum rot_irq_status {
  41         ROT_IRQ_STATUS_COMPLETE = 8,
  42         ROT_IRQ_STATUS_ILLEGAL  = 9,
  43 };
  44
  45 struct rot_variant {
  46         const struct exynos_drm_ipp_formats *formats;
  47         unsigned int    num_formats;
  48 };
  49
  50 /*
  51  * A structure of rotator context.
  52  * @ippdrv: prepare initialization using ippdrv.
  53  * @regs: memory mapped io registers.
  54  * @clock: rotator gate clock.
  55  * @limit_tbl: limitation of rotator.
  56  * @irq: irq number.
  57  */
  58 struct rot_context {
  59         struct exynos_drm_ipp ipp;
  60         struct drm_device *drm_dev;
  61         struct device   *dev;
  62         void __iomem    *regs;
  63         struct clk      *clock;
  64         const struct exynos_drm_ipp_formats *formats;
  65         unsigned int    num_formats;
  66         struct exynos_drm_ipp_task      *task;
  67 };
  68
  69 static void rotator_reg_set_irq(struct rot_context *rot, bool enable)
  70 {
  71         u32 val = rot_read(ROT_CONFIG);
  72
  73         if (enable == true)
  74                 val |= ROT_CONFIG_IRQ;
  75         else
  76                 val &= ~ROT_CONFIG_IRQ;
  77
  78         rot_write(val, ROT_CONFIG);
  79 }
  80
  81 static enum rot_irq_status rotator_reg_get_irq_status(struct rot_context *rot)
  82 {
  83         u32 val = rot_read(ROT_STATUS);
  84
  85         val = ROT_STATUS_IRQ(val);
  86
  87         if (val == ROT_STATUS_IRQ_VAL_COMPLETE)
  88                 return ROT_IRQ_STATUS_COMPLETE;
  89
  90         return ROT_IRQ_STATUS_ILLEGAL;
  91 }
  92
  93 static irqreturn_t rotator_irq_handler(int irq, void *arg)
  94 {
  95         struct rot_context *rot = arg;
  96         enum rot_irq_status irq_status;
  97         u32 val;
  98
  99         /* Get execution result */
 100         irq_status = rotator_reg_get_irq_status(rot);
 101
 102         /* clear status */
 103         val = rot_read(ROT_STATUS);
 104         val |= ROT_STATUS_IRQ_PENDING((u32)irq_status);
 105         rot_write(val, ROT_STATUS);
 106
 107         if (rot->task) {
 108                 struct exynos_drm_ipp_task *task = rot->task;
 109
 110                 rot->task = NULL;
 111                 pm_runtime_mark_last_busy(rot->dev);
 112                 pm_runtime_put_autosuspend(rot->dev);
 113                 exynos_drm_ipp_task_done(task,
 114                         irq_status == ROT_IRQ_STATUS_COMPLETE ? 0 : -EINVAL);
 115         }
 116
 117         return IRQ_HANDLED;
 118 }
 119
 120 static void rotator_src_set_fmt(struct rot_context *rot, u32 fmt)
 121 {
 122         u32 val;
 123
 124         val = rot_read(ROT_CONTROL);
 125         val &= ~ROT_CONTROL_FMT_MASK;
 126
 127         switch (fmt) {
 128         case DRM_FORMAT_NV12:
 129                 val |= ROT_CONTROL_FMT_YCBCR420_2P;
 130                 break;
 131         case DRM_FORMAT_XRGB8888:
 132                 val |= ROT_CONTROL_FMT_RGB888;
 133                 break;
 134         }
 135
 136         rot_write(val, ROT_CONTROL);
 137 }
 138
 139 static void rotator_src_set_buf(struct rot_context *rot,
 140                                 struct exynos_drm_ipp_buffer *buf)
 141 {
 142         u32 val;
 143
 144         /* Set buffer size configuration */
 145         val = ROT_SET_BUF_SIZE_H(buf->buf.height) |
 146               ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]);
 147         rot_write(val, ROT_SRC_BUF_SIZE);
 148
 149         /* Set crop image position configuration */
 150         val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x);
 151         rot_write(val, ROT_SRC_CROP_POS);
 152         val = ROT_SRC_CROP_SIZE_H(buf->rect.h) |
 153               ROT_SRC_CROP_SIZE_W(buf->rect.w);
 154         rot_write(val, ROT_SRC_CROP_SIZE);
 155
 156         /* Set buffer DMA address */
 157         rot_write(buf->dma_addr[0], ROT_SRC_BUF_ADDR(0));
 158         rot_write(buf->dma_addr[1], ROT_SRC_BUF_ADDR(1));
 159 }
 160
 161 static void rotator_dst_set_transf(struct rot_context *rot,
 162                                    unsigned int rotation)
 163 {
 164         u32 val;
 165
 166         /* Set transform configuration */
 167         val = rot_read(ROT_CONTROL);
 168         val &= ~ROT_CONTROL_FLIP_MASK;
 169
 170         if (rotation & DRM_MODE_REFLECT_X)
 171                 val |= ROT_CONTROL_FLIP_VERTICAL;
 172         if (rotation & DRM_MODE_REFLECT_Y)
 173                 val |= ROT_CONTROL_FLIP_HORIZONTAL;
 174
 175         val &= ~ROT_CONTROL_ROT_MASK;
 176
 177         if (rotation & DRM_MODE_ROTATE_90)
 178                 val |= ROT_CONTROL_ROT_90;
 179         else if (rotation & DRM_MODE_ROTATE_180)
 180                 val |= ROT_CONTROL_ROT_180;
 181         else if (rotation & DRM_MODE_ROTATE_270)
 182                 val |= ROT_CONTROL_ROT_270;
 183
 184         rot_write(val, ROT_CONTROL);
 185 }
 186
 187 static void rotator_dst_set_buf(struct rot_context *rot,
 188                                 struct exynos_drm_ipp_buffer *buf)
 189 {
 190         u32 val;
 191
 192         /* Set buffer size configuration */
 193         val = ROT_SET_BUF_SIZE_H(buf->buf.height) |
 194               ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]);
 195         rot_write(val, ROT_DST_BUF_SIZE);
 196
 197         /* Set crop image position configuration */
 198         val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x);
 199         rot_write(val, ROT_DST_CROP_POS);
 200
 201         /* Set buffer DMA address */
 202         rot_write(buf->dma_addr[0], ROT_DST_BUF_ADDR(0));
 203         rot_write(buf->dma_addr[1], ROT_DST_BUF_ADDR(1));
 204 }
 205
 206 static void rotator_start(struct rot_context *rot)
 207 {
 208         u32 val;
 209
 210         /* Set interrupt enable */
 211         rotator_reg_set_irq(rot, true);
 212
 213         val = rot_read(ROT_CONTROL);
 214         val |= ROT_CONTROL_START;
 215         rot_write(val, ROT_CONTROL);
 216 }
 217
 218 static int rotator_commit(struct exynos_drm_ipp *ipp,
 219                           struct exynos_drm_ipp_task *task)
 220 {
 221         struct rot_context *rot =
 222                         container_of(ipp, struct rot_context, ipp);
 223
 224         pm_runtime_get_sync(rot->dev);
 225         rot->task = task;
 226
 227         rotator_src_set_fmt(rot, task->src.buf.fourcc);
 228         rotator_src_set_buf(rot, &task->src);
 229         rotator_dst_set_transf(rot, task->transform.rotation);
 230         rotator_dst_set_buf(rot, &task->dst);
 231         rotator_start(rot);
 232
 233         return 0;
 234 }
 235
 236 static const struct exynos_drm_ipp_funcs ipp_funcs = {
 237         .commit = rotator_commit,
 238 };
 239
 240 static int rotator_bind(struct device *dev, struct device *master, void *data)
 241 {
 242         struct rot_context *rot = dev_get_drvdata(dev);
 243         struct drm_device *drm_dev = data;
 244         struct exynos_drm_ipp *ipp = &rot->ipp;
 245
 246         rot->drm_dev = drm_dev;
 247         drm_iommu_attach_device(drm_dev, dev);
 248
 249         exynos_drm_ipp_register(drm_dev, ipp, &ipp_funcs,
 250                            DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE,
 251                            rot->formats, rot->num_formats, "rotator");
 252
 253         dev_info(dev, "The exynos rotator has been probed successfully\n");
 254
 255         return 0;
 256 }
 257
 258 static void rotator_unbind(struct device *dev, struct device *master,
 259                         void *data)
 260 {
 261         struct rot_context *rot = dev_get_drvdata(dev);
 262         struct drm_device *drm_dev = data;
 263         struct exynos_drm_ipp *ipp = &rot->ipp;
 264
 265         exynos_drm_ipp_unregister(drm_dev, ipp);
 266         drm_iommu_detach_device(rot->drm_dev, rot->dev);
 267 }
 268
 269 static const struct component_ops rotator_component_ops = {
 270         .bind   = rotator_bind,
 271         .unbind = rotator_unbind,
 272 };
 273
 274 static int rotator_probe(struct platform_device *pdev)
 275 {
 276         struct device *dev = &pdev->dev;
 277         struct resource *regs_res;
 278         struct rot_context *rot;
 279         const struct rot_variant *variant;
 280         int irq;
 281         int ret;
 282
 283         rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL);
 284         if (!rot)
 285                 return -ENOMEM;
 286
 287         variant = of_device_get_match_data(dev);
 288         rot->formats = variant->formats;
 289         rot->num_formats = variant->num_formats;
 290         rot->dev = dev;
 291         regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 292         rot->regs = devm_ioremap_resource(dev, regs_res);
 293         if (IS_ERR(rot->regs))
 294                 return PTR_ERR(rot->regs);
 295
 296         irq = platform_get_irq(pdev, 0);
 297         if (irq < 0) {
 298                 dev_err(dev, "failed to get irq\n");
 299                 return irq;
 300         }
 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_4210_rbg888_limits[] = {
 361         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) },
 362         { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
 363 };
 364
 365 static const struct drm_exynos_ipp_limit rotator_4412_rbg888_limits[] = {
 366         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
 367         { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) },
 368 };
 369
 370 static const struct drm_exynos_ipp_limit rotator_5250_rbg888_limits[] = {
 371         { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) },
 372         { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) },
 373 };
 374
 375 static const struct drm_exynos_ipp_limit rotator_4210_yuv_limits[] = {
 376         { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) },
 377         { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
 378 };
 379
 380 static const struct drm_exynos_ipp_limit rotator_4412_yuv_limits[] = {
 381         { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_32K }, .v = { 32, SZ_32K }) },
 382         { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) },
 383 };
 384
 385 static const struct exynos_drm_ipp_formats rotator_4210_formats[] = {
 386         { IPP_SRCDST_FORMAT(XRGB8888, rotator_4210_rbg888_limits) },
 387         { IPP_SRCDST_FORMAT(NV12, rotator_4210_yuv_limits) },
 388 };
 389
 390 static const struct exynos_drm_ipp_formats rotator_4412_formats[] = {
 391         { IPP_SRCDST_FORMAT(XRGB8888, rotator_4412_rbg888_limits) },
 392         { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
 393 };
 394
 395 static const struct exynos_drm_ipp_formats rotator_5250_formats[] = {
 396         { IPP_SRCDST_FORMAT(XRGB8888, rotator_5250_rbg888_limits) },
 397         { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) },
 398 };
 399
 400 static const struct rot_variant rotator_4210_data = {
 401         .formats = rotator_4210_formats,
 402         .num_formats = ARRAY_SIZE(rotator_4210_formats),
 403 };
 404
 405 static const struct rot_variant rotator_4412_data = {
 406         .formats = rotator_4412_formats,
 407         .num_formats = ARRAY_SIZE(rotator_4412_formats),
 408 };
 409
 410 static const struct rot_variant rotator_5250_data = {
 411         .formats = rotator_5250_formats,
 412         .num_formats = ARRAY_SIZE(rotator_5250_formats),
 413 };
 414
 415 static const struct of_device_id exynos_rotator_match[] = {
 416         {
 417                 .compatible = "samsung,exynos4210-rotator",
 418                 .data = &rotator_4210_data,
 419         }, {
 420                 .compatible = "samsung,exynos4212-rotator",
 421                 .data = &rotator_4412_data,
 422         }, {
 423                 .compatible = "samsung,exynos5250-rotator",
 424                 .data = &rotator_5250_data,
 425         }, {
 426         },
 427 };
 428 MODULE_DEVICE_TABLE(of, exynos_rotator_match);
 429
 430 static const struct dev_pm_ops rotator_pm_ops = {
 431         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 432                                 pm_runtime_force_resume)
 433         SET_RUNTIME_PM_OPS(rotator_runtime_suspend, rotator_runtime_resume,
 434                                                                         NULL)
 435 };
 436
 437 struct platform_driver rotator_driver = {
 438         .probe          = rotator_probe,
 439         .remove         = rotator_remove,
 440         .driver         = {
 441                 .name   = "exynos-rotator",
 442                 .owner  = THIS_MODULE,
 443                 .pm     = &rotator_pm_ops,
 444                 .of_match_table = exynos_rotator_match,
 445         },
 446 };