drivers/gpu/drm/zte/zx_plane.c

   1 /*
   2  * Copyright 2016 Linaro Ltd.
   3  * Copyright 2016 ZTE Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  */
  10
  11 #include <drm/drm_atomic.h>
  12 #include <drm/drm_atomic_helper.h>
  13 #include <drm/drm_fb_cma_helper.h>
  14 #include <drm/drm_gem_cma_helper.h>
  15 #include <drm/drm_modeset_helper_vtables.h>
  16 #include <drm/drm_plane_helper.h>
  17 #include <drm/drmP.h>
  18
  19 #include "zx_common_regs.h"
  20 #include "zx_drm_drv.h"
  21 #include "zx_plane.h"
  22 #include "zx_plane_regs.h"
  23 #include "zx_vou.h"
  24
  25 static const uint32_t gl_formats[] = {
  26         DRM_FORMAT_ARGB8888,
  27         DRM_FORMAT_XRGB8888,
  28         DRM_FORMAT_RGB888,
  29         DRM_FORMAT_RGB565,
  30         DRM_FORMAT_ARGB1555,
  31         DRM_FORMAT_ARGB4444,
  32 };
  33
  34 static const uint32_t vl_formats[] = {
  35         DRM_FORMAT_NV12,        /* Semi-planar YUV420 */
  36         DRM_FORMAT_YUV420,      /* Planar YUV420 */
  37         DRM_FORMAT_YUYV,        /* Packed YUV422 */
  38         DRM_FORMAT_YVYU,
  39         DRM_FORMAT_UYVY,
  40         DRM_FORMAT_VYUY,
  41         DRM_FORMAT_YUV444,      /* YUV444 8bit */
  42         /*
  43          * TODO: add formats below that HW supports:
  44          *  - YUV420 P010
  45          *  - YUV420 Hantro
  46          *  - YUV444 10bit
  47          */
  48 };
  49
  50 #define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
  51
  52 static int zx_vl_plane_atomic_check(struct drm_plane *plane,
  53                                     struct drm_plane_state *plane_state)
  54 {
  55         struct drm_framebuffer *fb = plane_state->fb;
  56         struct drm_crtc *crtc = plane_state->crtc;
  57         struct drm_crtc_state *crtc_state;
  58         struct drm_rect clip;
  59         int min_scale = FRAC_16_16(1, 8);
  60         int max_scale = FRAC_16_16(8, 1);
  61
  62         if (!crtc || !fb)
  63                 return 0;
  64
  65         crtc_state = drm_atomic_get_existing_crtc_state(plane_state->state,
  66                                                         crtc);
  67         if (WARN_ON(!crtc_state))
  68                 return -EINVAL;
  69
  70         /* nothing to check when disabling or disabled */
  71         if (!crtc_state->enable)
  72                 return 0;
  73
  74         /* plane must be enabled */
  75         if (!plane_state->crtc)
  76                 return -EINVAL;
  77
  78         clip.x1 = 0;
  79         clip.y1 = 0;
  80         clip.x2 = crtc_state->adjusted_mode.hdisplay;
  81         clip.y2 = crtc_state->adjusted_mode.vdisplay;
  82
  83         return drm_plane_helper_check_state(plane_state, &clip,
  84                                             min_scale, max_scale,
  85                                             true, true);
  86 }
  87
  88 static int zx_vl_get_fmt(uint32_t format)
  89 {
  90         switch (format) {
  91         case DRM_FORMAT_NV12:
  92                 return VL_FMT_YUV420;
  93         case DRM_FORMAT_YUV420:
  94                 return VL_YUV420_PLANAR | VL_FMT_YUV420;
  95         case DRM_FORMAT_YUYV:
  96                 return VL_YUV422_YUYV | VL_FMT_YUV422;
  97         case DRM_FORMAT_YVYU:
  98                 return VL_YUV422_YVYU | VL_FMT_YUV422;
  99         case DRM_FORMAT_UYVY:
 100                 return VL_YUV422_UYVY | VL_FMT_YUV422;
 101         case DRM_FORMAT_VYUY:
 102                 return VL_YUV422_VYUY | VL_FMT_YUV422;
 103         case DRM_FORMAT_YUV444:
 104                 return VL_FMT_YUV444_8BIT;
 105         default:
 106                 WARN_ONCE(1, "invalid pixel format %d\n", format);
 107                 return -EINVAL;
 108         }
 109 }
 110
 111 static inline void zx_vl_set_update(struct zx_plane *zplane)
 112 {
 113         void __iomem *layer = zplane->layer;
 114
 115         zx_writel_mask(layer + VL_CTRL0, VL_UPDATE, VL_UPDATE);
 116 }
 117
 118 static inline void zx_vl_rsz_set_update(struct zx_plane *zplane)
 119 {
 120         zx_writel(zplane->rsz + RSZ_VL_ENABLE_CFG, 1);
 121 }
 122
 123 static int zx_vl_rsz_get_fmt(uint32_t format)
 124 {
 125         switch (format) {
 126         case DRM_FORMAT_NV12:
 127         case DRM_FORMAT_YUV420:
 128                 return RSZ_VL_FMT_YCBCR420;
 129         case DRM_FORMAT_YUYV:
 130         case DRM_FORMAT_YVYU:
 131         case DRM_FORMAT_UYVY:
 132         case DRM_FORMAT_VYUY:
 133                 return RSZ_VL_FMT_YCBCR422;
 134         case DRM_FORMAT_YUV444:
 135                 return RSZ_VL_FMT_YCBCR444;
 136         default:
 137                 WARN_ONCE(1, "invalid pixel format %d\n", format);
 138                 return -EINVAL;
 139         }
 140 }
 141
 142 static inline u32 rsz_step_value(u32 src, u32 dst)
 143 {
 144         u32 val = 0;
 145
 146         if (src == dst)
 147                 val = 0;
 148         else if (src < dst)
 149                 val = RSZ_PARA_STEP((src << 16) / dst);
 150         else if (src > dst)
 151                 val = RSZ_DATA_STEP(src / dst) |
 152                       RSZ_PARA_STEP(((src << 16) / dst) & 0xffff);
 153
 154         return val;
 155 }
 156
 157 static void zx_vl_rsz_setup(struct zx_plane *zplane, uint32_t format,
 158                             u32 src_w, u32 src_h, u32 dst_w, u32 dst_h)
 159 {
 160         void __iomem *rsz = zplane->rsz;
 161         u32 src_chroma_w = src_w;
 162         u32 src_chroma_h = src_h;
 163         int fmt;
 164
 165         /* Set up source and destination resolution */
 166         zx_writel(rsz + RSZ_SRC_CFG, RSZ_VER(src_h - 1) | RSZ_HOR(src_w - 1));
 167         zx_writel(rsz + RSZ_DEST_CFG, RSZ_VER(dst_h - 1) | RSZ_HOR(dst_w - 1));
 168
 169         /* Configure data format for VL RSZ */
 170         fmt = zx_vl_rsz_get_fmt(format);
 171         if (fmt >= 0)
 172                 zx_writel_mask(rsz + RSZ_VL_CTRL_CFG, RSZ_VL_FMT_MASK, fmt);
 173
 174         /* Calculate Chroma height and width */
 175         if (fmt == RSZ_VL_FMT_YCBCR420) {
 176                 src_chroma_w = src_w >> 1;
 177                 src_chroma_h = src_h >> 1;
 178         } else if (fmt == RSZ_VL_FMT_YCBCR422) {
 179                 src_chroma_w = src_w >> 1;
 180         }
 181
 182         /* Set up Luma and Chroma step registers */
 183         zx_writel(rsz + RSZ_VL_LUMA_HOR, rsz_step_value(src_w, dst_w));
 184         zx_writel(rsz + RSZ_VL_LUMA_VER, rsz_step_value(src_h, dst_h));
 185         zx_writel(rsz + RSZ_VL_CHROMA_HOR, rsz_step_value(src_chroma_w, dst_w));
 186         zx_writel(rsz + RSZ_VL_CHROMA_VER, rsz_step_value(src_chroma_h, dst_h));
 187
 188         zx_vl_rsz_set_update(zplane);
 189 }
 190
 191 static void zx_vl_plane_atomic_update(struct drm_plane *plane,
 192                                       struct drm_plane_state *old_state)
 193 {
 194         struct zx_plane *zplane = to_zx_plane(plane);
 195         struct drm_plane_state *state = plane->state;
 196         struct drm_framebuffer *fb = state->fb;
 197         struct drm_rect *src = &state->src;
 198         struct drm_rect *dst = &state->dst;
 199         struct drm_gem_cma_object *cma_obj;
 200         void __iomem *layer = zplane->layer;
 201         void __iomem *hbsc = zplane->hbsc;
 202         void __iomem *paddr_reg;
 203         dma_addr_t paddr;
 204         u32 src_x, src_y, src_w, src_h;
 205         u32 dst_x, dst_y, dst_w, dst_h;
 206         uint32_t format;
 207         int fmt;
 208         int num_planes;
 209         int i;
 210
 211         if (!fb)
 212                 return;
 213
 214         format = fb->format->format;
 215
 216         src_x = src->x1 >> 16;
 217         src_y = src->y1 >> 16;
 218         src_w = drm_rect_width(src) >> 16;
 219         src_h = drm_rect_height(src) >> 16;
 220
 221         dst_x = dst->x1;
 222         dst_y = dst->y1;
 223         dst_w = drm_rect_width(dst);
 224         dst_h = drm_rect_height(dst);
 225
 226         /* Set up data address registers for Y, Cb and Cr planes */
 227         num_planes = drm_format_num_planes(format);
 228         paddr_reg = layer + VL_Y;
 229         for (i = 0; i < num_planes; i++) {
 230                 cma_obj = drm_fb_cma_get_gem_obj(fb, i);
 231                 paddr = cma_obj->paddr + fb->offsets[i];
 232                 paddr += src_y * fb->pitches[i];
 233                 paddr += src_x * drm_format_plane_cpp(format, i);
 234                 zx_writel(paddr_reg, paddr);
 235                 paddr_reg += 4;
 236         }
 237
 238         /* Set up source height/width register */
 239         zx_writel(layer + VL_SRC_SIZE, GL_SRC_W(src_w) | GL_SRC_H(src_h));
 240
 241         /* Set up start position register */
 242         zx_writel(layer + VL_POS_START, GL_POS_X(dst_x) | GL_POS_Y(dst_y));
 243
 244         /* Set up end position register */
 245         zx_writel(layer + VL_POS_END,
 246                   GL_POS_X(dst_x + dst_w) | GL_POS_Y(dst_y + dst_h));
 247
 248         /* Strides of Cb and Cr planes should be identical */
 249         zx_writel(layer + VL_STRIDE, LUMA_STRIDE(fb->pitches[0]) |
 250                   CHROMA_STRIDE(fb->pitches[1]));
 251
 252         /* Set up video layer data format */
 253         fmt = zx_vl_get_fmt(format);
 254         if (fmt >= 0)
 255                 zx_writel(layer + VL_CTRL1, fmt);
 256
 257         /* Always use scaler since it exists (set for not bypass) */
 258         zx_writel_mask(layer + VL_CTRL2, VL_SCALER_BYPASS_MODE,
 259                        VL_SCALER_BYPASS_MODE);
 260
 261         zx_vl_rsz_setup(zplane, format, src_w, src_h, dst_w, dst_h);
 262
 263         /* Enable HBSC block */
 264         zx_writel_mask(hbsc + HBSC_CTRL0, HBSC_CTRL_EN, HBSC_CTRL_EN);
 265
 266         zx_vou_layer_enable(plane);
 267
 268         zx_vl_set_update(zplane);
 269 }
 270
 271 static void zx_plane_atomic_disable(struct drm_plane *plane,
 272                                     struct drm_plane_state *old_state)
 273 {
 274         struct zx_plane *zplane = to_zx_plane(plane);
 275         void __iomem *hbsc = zplane->hbsc;
 276
 277         zx_vou_layer_disable(plane);
 278
 279         /* Disable HBSC block */
 280         zx_writel_mask(hbsc + HBSC_CTRL0, HBSC_CTRL_EN, 0);
 281 }
 282
 283 static const struct drm_plane_helper_funcs zx_vl_plane_helper_funcs = {
 284         .atomic_check = zx_vl_plane_atomic_check,
 285         .atomic_update = zx_vl_plane_atomic_update,
 286         .atomic_disable = zx_plane_atomic_disable,
 287 };
 288
 289 static int zx_gl_plane_atomic_check(struct drm_plane *plane,
 290                                     struct drm_plane_state *plane_state)
 291 {
 292         struct drm_framebuffer *fb = plane_state->fb;
 293         struct drm_crtc *crtc = plane_state->crtc;
 294         struct drm_crtc_state *crtc_state;
 295         struct drm_rect clip;
 296
 297         if (!crtc || !fb)
 298                 return 0;
 299
 300         crtc_state = drm_atomic_get_existing_crtc_state(plane_state->state,
 301                                                         crtc);
 302         if (WARN_ON(!crtc_state))
 303                 return -EINVAL;
 304
 305         /* nothing to check when disabling or disabled */
 306         if (!crtc_state->enable)
 307                 return 0;
 308
 309         /* plane must be enabled */
 310         if (!plane_state->crtc)
 311                 return -EINVAL;
 312
 313         clip.x1 = 0;
 314         clip.y1 = 0;
 315         clip.x2 = crtc_state->adjusted_mode.hdisplay;
 316         clip.y2 = crtc_state->adjusted_mode.vdisplay;
 317
 318         return drm_plane_helper_check_state(plane_state, &clip,
 319                                             DRM_PLANE_HELPER_NO_SCALING,
 320                                             DRM_PLANE_HELPER_NO_SCALING,
 321                                             false, true);
 322 }
 323
 324 static int zx_gl_get_fmt(uint32_t format)
 325 {
 326         switch (format) {
 327         case DRM_FORMAT_ARGB8888:
 328         case DRM_FORMAT_XRGB8888:
 329                 return GL_FMT_ARGB8888;
 330         case DRM_FORMAT_RGB888:
 331                 return GL_FMT_RGB888;
 332         case DRM_FORMAT_RGB565:
 333                 return GL_FMT_RGB565;
 334         case DRM_FORMAT_ARGB1555:
 335                 return GL_FMT_ARGB1555;
 336         case DRM_FORMAT_ARGB4444:
 337                 return GL_FMT_ARGB4444;
 338         default:
 339                 WARN_ONCE(1, "invalid pixel format %d\n", format);
 340                 return -EINVAL;
 341         }
 342 }
 343
 344 static inline void zx_gl_set_update(struct zx_plane *zplane)
 345 {
 346         void __iomem *layer = zplane->layer;
 347
 348         zx_writel_mask(layer + GL_CTRL0, GL_UPDATE, GL_UPDATE);
 349 }
 350
 351 static inline void zx_gl_rsz_set_update(struct zx_plane *zplane)
 352 {
 353         zx_writel(zplane->rsz + RSZ_ENABLE_CFG, 1);
 354 }
 355
 356 static void zx_gl_rsz_setup(struct zx_plane *zplane, u32 src_w, u32 src_h,
 357                             u32 dst_w, u32 dst_h)
 358 {
 359         void __iomem *rsz = zplane->rsz;
 360
 361         zx_writel(rsz + RSZ_SRC_CFG, RSZ_VER(src_h - 1) | RSZ_HOR(src_w - 1));
 362         zx_writel(rsz + RSZ_DEST_CFG, RSZ_VER(dst_h - 1) | RSZ_HOR(dst_w - 1));
 363
 364         zx_gl_rsz_set_update(zplane);
 365 }
 366
 367 static void zx_gl_plane_atomic_update(struct drm_plane *plane,
 368                                       struct drm_plane_state *old_state)
 369 {
 370         struct zx_plane *zplane = to_zx_plane(plane);
 371         struct drm_framebuffer *fb = plane->state->fb;
 372         struct drm_gem_cma_object *cma_obj;
 373         void __iomem *layer = zplane->layer;
 374         void __iomem *csc = zplane->csc;
 375         void __iomem *hbsc = zplane->hbsc;
 376         u32 src_x, src_y, src_w, src_h;
 377         u32 dst_x, dst_y, dst_w, dst_h;
 378         unsigned int bpp;
 379         uint32_t format;
 380         dma_addr_t paddr;
 381         u32 stride;
 382         int fmt;
 383
 384         if (!fb)
 385                 return;
 386
 387         format = fb->format->format;
 388         stride = fb->pitches[0];
 389
 390         src_x = plane->state->src_x >> 16;
 391         src_y = plane->state->src_y >> 16;
 392         src_w = plane->state->src_w >> 16;
 393         src_h = plane->state->src_h >> 16;
 394
 395         dst_x = plane->state->crtc_x;
 396         dst_y = plane->state->crtc_y;
 397         dst_w = plane->state->crtc_w;
 398         dst_h = plane->state->crtc_h;
 399
 400         bpp = fb->format->cpp[0];
 401
 402         cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
 403         paddr = cma_obj->paddr + fb->offsets[0];
 404         paddr += src_y * stride + src_x * bpp / 8;
 405         zx_writel(layer + GL_ADDR, paddr);
 406
 407         /* Set up source height/width register */
 408         zx_writel(layer + GL_SRC_SIZE, GL_SRC_W(src_w) | GL_SRC_H(src_h));
 409
 410         /* Set up start position register */
 411         zx_writel(layer + GL_POS_START, GL_POS_X(dst_x) | GL_POS_Y(dst_y));
 412
 413         /* Set up end position register */
 414         zx_writel(layer + GL_POS_END,
 415                   GL_POS_X(dst_x + dst_w) | GL_POS_Y(dst_y + dst_h));
 416
 417         /* Set up stride register */
 418         zx_writel(layer + GL_STRIDE, stride & 0xffff);
 419
 420         /* Set up graphic layer data format */
 421         fmt = zx_gl_get_fmt(format);
 422         if (fmt >= 0)
 423                 zx_writel_mask(layer + GL_CTRL1, GL_DATA_FMT_MASK,
 424                                fmt << GL_DATA_FMT_SHIFT);
 425
 426         /* Initialize global alpha with a sane value */
 427         zx_writel_mask(layer + GL_CTRL2, GL_GLOBAL_ALPHA_MASK,
 428                        0xff << GL_GLOBAL_ALPHA_SHIFT);
 429
 430         /* Setup CSC for the GL */
 431         if (dst_h > 720)
 432                 zx_writel_mask(csc + CSC_CTRL0, CSC_COV_MODE_MASK,
 433                                CSC_BT709_IMAGE_RGB2YCBCR << CSC_COV_MODE_SHIFT);
 434         else
 435                 zx_writel_mask(csc + CSC_CTRL0, CSC_COV_MODE_MASK,
 436                                CSC_BT601_IMAGE_RGB2YCBCR << CSC_COV_MODE_SHIFT);
 437         zx_writel_mask(csc + CSC_CTRL0, CSC_WORK_ENABLE, CSC_WORK_ENABLE);
 438
 439         /* Always use scaler since it exists (set for not bypass) */
 440         zx_writel_mask(layer + GL_CTRL3, GL_SCALER_BYPASS_MODE,
 441                        GL_SCALER_BYPASS_MODE);
 442
 443         zx_gl_rsz_setup(zplane, src_w, src_h, dst_w, dst_h);
 444
 445         /* Enable HBSC block */
 446         zx_writel_mask(hbsc + HBSC_CTRL0, HBSC_CTRL_EN, HBSC_CTRL_EN);
 447
 448         zx_vou_layer_enable(plane);
 449
 450         zx_gl_set_update(zplane);
 451 }
 452
 453 static const struct drm_plane_helper_funcs zx_gl_plane_helper_funcs = {
 454         .atomic_check = zx_gl_plane_atomic_check,
 455         .atomic_update = zx_gl_plane_atomic_update,
 456         .atomic_disable = zx_plane_atomic_disable,
 457 };
 458
 459 static void zx_plane_destroy(struct drm_plane *plane)
 460 {
 461         drm_plane_helper_disable(plane);
 462         drm_plane_cleanup(plane);
 463 }
 464
 465 static const struct drm_plane_funcs zx_plane_funcs = {
 466         .update_plane = drm_atomic_helper_update_plane,
 467         .disable_plane = drm_atomic_helper_disable_plane,
 468         .destroy = zx_plane_destroy,
 469         .reset = drm_atomic_helper_plane_reset,
 470         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 471         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 472 };
 473
 474 void zx_plane_set_update(struct drm_plane *plane)
 475 {
 476         struct zx_plane *zplane = to_zx_plane(plane);
 477
 478         /* Do nothing if the plane is not enabled */
 479         if (!plane->state->crtc)
 480                 return;
 481
 482         switch (plane->type) {
 483         case DRM_PLANE_TYPE_PRIMARY:
 484                 zx_gl_rsz_set_update(zplane);
 485                 zx_gl_set_update(zplane);
 486                 break;
 487         case DRM_PLANE_TYPE_OVERLAY:
 488                 zx_vl_rsz_set_update(zplane);
 489                 zx_vl_set_update(zplane);
 490                 break;
 491         default:
 492                 WARN_ONCE(1, "unsupported plane type %d\n", plane->type);
 493         }
 494 }
 495
 496 static void zx_plane_hbsc_init(struct zx_plane *zplane)
 497 {
 498         void __iomem *hbsc = zplane->hbsc;
 499
 500         /*
 501          *  Initialize HBSC block with a sane configuration per recommedation
 502          *  from ZTE BSP code.
 503          */
 504         zx_writel(hbsc + HBSC_SATURATION, 0x200);
 505         zx_writel(hbsc + HBSC_HUE, 0x0);
 506         zx_writel(hbsc + HBSC_BRIGHT, 0x0);
 507         zx_writel(hbsc + HBSC_CONTRAST, 0x200);
 508
 509         zx_writel(hbsc + HBSC_THRESHOLD_COL1, (0x3ac << 16) | 0x40);
 510         zx_writel(hbsc + HBSC_THRESHOLD_COL2, (0x3c0 << 16) | 0x40);
 511         zx_writel(hbsc + HBSC_THRESHOLD_COL3, (0x3c0 << 16) | 0x40);
 512 }
 513
 514 int zx_plane_init(struct drm_device *drm, struct zx_plane *zplane,
 515                   enum drm_plane_type type)
 516 {
 517         const struct drm_plane_helper_funcs *helper;
 518         struct drm_plane *plane = &zplane->plane;
 519         struct device *dev = zplane->dev;
 520         const uint32_t *formats;
 521         unsigned int format_count;
 522         int ret;
 523
 524         zx_plane_hbsc_init(zplane);
 525
 526         switch (type) {
 527         case DRM_PLANE_TYPE_PRIMARY:
 528                 helper = &zx_gl_plane_helper_funcs;
 529                 formats = gl_formats;
 530                 format_count = ARRAY_SIZE(gl_formats);
 531                 break;
 532         case DRM_PLANE_TYPE_OVERLAY:
 533                 helper = &zx_vl_plane_helper_funcs;
 534                 formats = vl_formats;
 535                 format_count = ARRAY_SIZE(vl_formats);
 536                 break;
 537         default:
 538                 return -ENODEV;
 539         }
 540
 541         ret = drm_universal_plane_init(drm, plane, VOU_CRTC_MASK,
 542                                        &zx_plane_funcs, formats, format_count,
 543                                        NULL, type, NULL);
 544         if (ret) {
 545                 DRM_DEV_ERROR(dev, "failed to init universal plane: %d\n", ret);
 546                 return ret;
 547         }
 548
 549         drm_plane_helper_add(plane, helper);
 550
 551         return 0;
 552 }