drivers/gpu/drm/sun4i/sun4i_frontend.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Free Electrons
   4  * Maxime Ripard <maxime.ripard@free-electrons.com>
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/module.h>
  10 #include <linux/of.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/regmap.h>
  14 #include <linux/reset.h>
  15
  16 #include <drm/drm_device.h>
  17 #include <drm/drm_fb_dma_helper.h>
  18 #include <drm/drm_fourcc.h>
  19 #include <drm/drm_framebuffer.h>
  20 #include <drm/drm_gem_dma_helper.h>
  21 #include <drm/drm_plane.h>
  22
  23 #include "sun4i_drv.h"
  24 #include "sun4i_frontend.h"
  25
  26 static const u32 sun4i_frontend_vert_coef[32] = {
  27         0x00004000, 0x000140ff, 0x00033ffe, 0x00043ffd,
  28         0x00063efc, 0xff083dfc, 0x000a3bfb, 0xff0d39fb,
  29         0xff0f37fb, 0xff1136fa, 0xfe1433fb, 0xfe1631fb,
  30         0xfd192ffb, 0xfd1c2cfb, 0xfd1f29fb, 0xfc2127fc,
  31         0xfc2424fc, 0xfc2721fc, 0xfb291ffd, 0xfb2c1cfd,
  32         0xfb2f19fd, 0xfb3116fe, 0xfb3314fe, 0xfa3611ff,
  33         0xfb370fff, 0xfb390dff, 0xfb3b0a00, 0xfc3d08ff,
  34         0xfc3e0600, 0xfd3f0400, 0xfe3f0300, 0xff400100,
  35 };
  36
  37 static const u32 sun4i_frontend_horz_coef[64] = {
  38         0x40000000, 0x00000000, 0x40fe0000, 0x0000ff03,
  39         0x3ffd0000, 0x0000ff05, 0x3ffc0000, 0x0000ff06,
  40         0x3efb0000, 0x0000ff08, 0x3dfb0000, 0x0000ff09,
  41         0x3bfa0000, 0x0000fe0d, 0x39fa0000, 0x0000fe0f,
  42         0x38fa0000, 0x0000fe10, 0x36fa0000, 0x0000fe12,
  43         0x33fa0000, 0x0000fd16, 0x31fa0000, 0x0000fd18,
  44         0x2ffa0000, 0x0000fd1a, 0x2cfa0000, 0x0000fc1e,
  45         0x29fa0000, 0x0000fc21, 0x27fb0000, 0x0000fb23,
  46         0x24fb0000, 0x0000fb26, 0x21fb0000, 0x0000fb29,
  47         0x1ffc0000, 0x0000fa2b, 0x1cfc0000, 0x0000fa2e,
  48         0x19fd0000, 0x0000fa30, 0x16fd0000, 0x0000fa33,
  49         0x14fd0000, 0x0000fa35, 0x11fe0000, 0x0000fa37,
  50         0x0ffe0000, 0x0000fa39, 0x0dfe0000, 0x0000fa3b,
  51         0x0afe0000, 0x0000fa3e, 0x08ff0000, 0x0000fb3e,
  52         0x06ff0000, 0x0000fb40, 0x05ff0000, 0x0000fc40,
  53         0x03ff0000, 0x0000fd41, 0x01ff0000, 0x0000fe42,
  54 };
  55
  56 /*
  57  * These coefficients are taken from the A33 BSP from Allwinner.
  58  *
  59  * The first three values of each row are coded as 13-bit signed fixed-point
  60  * numbers, with 10 bits for the fractional part. The fourth value is a
  61  * constant coded as a 14-bit signed fixed-point number with 4 bits for the
  62  * fractional part.
  63  *
  64  * The values in table order give the following colorspace translation:
  65  * G = 1.164 * Y - 0.391 * U - 0.813 * V + 135
  66  * R = 1.164 * Y + 1.596 * V - 222
  67  * B = 1.164 * Y + 2.018 * U + 276
  68  *
  69  * This seems to be a conversion from Y[16:235] UV[16:240] to RGB[0:255],
  70  * following the BT601 spec.
  71  */
  72 const u32 sunxi_bt601_yuv2rgb_coef[12] = {
  73         0x000004a7, 0x00001e6f, 0x00001cbf, 0x00000877,
  74         0x000004a7, 0x00000000, 0x00000662, 0x00003211,
  75         0x000004a7, 0x00000812, 0x00000000, 0x00002eb1,
  76 };
  77 EXPORT_SYMBOL(sunxi_bt601_yuv2rgb_coef);
  78
  79 static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend)
  80 {
  81         int i;
  82
  83         if (frontend->data->has_coef_access_ctrl)
  84                 regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG,
  85                                   SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL,
  86                                   SUN4I_FRONTEND_FRM_CTRL_COEF_ACCESS_CTRL);
  87
  88         for (i = 0; i < 32; i++) {
  89                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZCOEF0_REG(i),
  90                              sun4i_frontend_horz_coef[2 * i]);
  91                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZCOEF0_REG(i),
  92                              sun4i_frontend_horz_coef[2 * i]);
  93                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZCOEF1_REG(i),
  94                              sun4i_frontend_horz_coef[2 * i + 1]);
  95                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZCOEF1_REG(i),
  96                              sun4i_frontend_horz_coef[2 * i + 1]);
  97                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTCOEF_REG(i),
  98                              sun4i_frontend_vert_coef[i]);
  99                 regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTCOEF_REG(i),
 100                              sun4i_frontend_vert_coef[i]);
 101         }
 102
 103         if (frontend->data->has_coef_rdy)
 104                 regmap_write_bits(frontend->regs,
 105                                   SUN4I_FRONTEND_FRM_CTRL_REG,
 106                                   SUN4I_FRONTEND_FRM_CTRL_COEF_RDY,
 107                                   SUN4I_FRONTEND_FRM_CTRL_COEF_RDY);
 108 }
 109
 110 int sun4i_frontend_init(struct sun4i_frontend *frontend)
 111 {
 112         return pm_runtime_get_sync(frontend->dev);
 113 }
 114 EXPORT_SYMBOL(sun4i_frontend_init);
 115
 116 void sun4i_frontend_exit(struct sun4i_frontend *frontend)
 117 {
 118         pm_runtime_put(frontend->dev);
 119 }
 120 EXPORT_SYMBOL(sun4i_frontend_exit);
 121
 122 static bool sun4i_frontend_format_chroma_requires_swap(uint32_t fmt)
 123 {
 124         switch (fmt) {
 125         case DRM_FORMAT_YVU411:
 126         case DRM_FORMAT_YVU420:
 127         case DRM_FORMAT_YVU422:
 128         case DRM_FORMAT_YVU444:
 129                 return true;
 130
 131         default:
 132                 return false;
 133         }
 134 }
 135
 136 static bool sun4i_frontend_format_supports_tiling(uint32_t fmt)
 137 {
 138         switch (fmt) {
 139         case DRM_FORMAT_NV12:
 140         case DRM_FORMAT_NV16:
 141         case DRM_FORMAT_NV21:
 142         case DRM_FORMAT_NV61:
 143         case DRM_FORMAT_YUV411:
 144         case DRM_FORMAT_YUV420:
 145         case DRM_FORMAT_YUV422:
 146         case DRM_FORMAT_YVU420:
 147         case DRM_FORMAT_YVU422:
 148         case DRM_FORMAT_YVU411:
 149                 return true;
 150
 151         default:
 152                 return false;
 153         }
 154 }
 155
 156 void sun4i_frontend_update_buffer(struct sun4i_frontend *frontend,
 157                                   struct drm_plane *plane)
 158 {
 159         struct drm_plane_state *state = plane->state;
 160         struct drm_framebuffer *fb = state->fb;
 161         unsigned int strides[3] = {};
 162
 163         dma_addr_t dma_addr;
 164         bool swap;
 165
 166         if (fb->modifier == DRM_FORMAT_MOD_ALLWINNER_TILED) {
 167                 unsigned int width = state->src_w >> 16;
 168                 unsigned int offset;
 169
 170                 strides[0] = SUN4I_FRONTEND_LINESTRD_TILED(fb->pitches[0]);
 171
 172                 /*
 173                  * The X1 offset is the offset to the bottom-right point in the
 174                  * end tile, which is the final pixel (at offset width - 1)
 175                  * within the end tile (with a 32-byte mask).
 176                  */
 177                 offset = (width - 1) & (32 - 1);
 178
 179                 regmap_write(frontend->regs, SUN4I_FRONTEND_TB_OFF0_REG,
 180                              SUN4I_FRONTEND_TB_OFF_X1(offset));
 181
 182                 if (fb->format->num_planes > 1) {
 183                         strides[1] =
 184                                 SUN4I_FRONTEND_LINESTRD_TILED(fb->pitches[1]);
 185
 186                         regmap_write(frontend->regs, SUN4I_FRONTEND_TB_OFF1_REG,
 187                                      SUN4I_FRONTEND_TB_OFF_X1(offset));
 188                 }
 189
 190                 if (fb->format->num_planes > 2) {
 191                         strides[2] =
 192                                 SUN4I_FRONTEND_LINESTRD_TILED(fb->pitches[2]);
 193
 194                         regmap_write(frontend->regs, SUN4I_FRONTEND_TB_OFF2_REG,
 195                                      SUN4I_FRONTEND_TB_OFF_X1(offset));
 196                 }
 197         } else {
 198                 strides[0] = fb->pitches[0];
 199
 200                 if (fb->format->num_planes > 1)
 201                         strides[1] = fb->pitches[1];
 202
 203                 if (fb->format->num_planes > 2)
 204                         strides[2] = fb->pitches[2];
 205         }
 206
 207         /* Set the line width */
 208         DRM_DEBUG_DRIVER("Frontend stride: %d bytes\n", fb->pitches[0]);
 209         regmap_write(frontend->regs, SUN4I_FRONTEND_LINESTRD0_REG,
 210                      strides[0]);
 211
 212         if (fb->format->num_planes > 1)
 213                 regmap_write(frontend->regs, SUN4I_FRONTEND_LINESTRD1_REG,
 214                              strides[1]);
 215
 216         if (fb->format->num_planes > 2)
 217                 regmap_write(frontend->regs, SUN4I_FRONTEND_LINESTRD2_REG,
 218                              strides[2]);
 219
 220         /* Some planar formats require chroma channel swapping by hand. */
 221         swap = sun4i_frontend_format_chroma_requires_swap(fb->format->format);
 222
 223         /* Set the physical address of the buffer in memory */
 224         dma_addr = drm_fb_dma_get_gem_addr(fb, state, 0);
 225         DRM_DEBUG_DRIVER("Setting buffer #0 address to %pad\n", &dma_addr);
 226         regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR0_REG, dma_addr);
 227
 228         if (fb->format->num_planes > 1) {
 229                 dma_addr = drm_fb_dma_get_gem_addr(fb, state, swap ? 2 : 1);
 230                 DRM_DEBUG_DRIVER("Setting buffer #1 address to %pad\n",
 231                                  &dma_addr);
 232                 regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR1_REG,
 233                              dma_addr);
 234         }
 235
 236         if (fb->format->num_planes > 2) {
 237                 dma_addr = drm_fb_dma_get_gem_addr(fb, state, swap ? 1 : 2);
 238                 DRM_DEBUG_DRIVER("Setting buffer #2 address to %pad\n",
 239                                  &dma_addr);
 240                 regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR2_REG,
 241                              dma_addr);
 242         }
 243 }
 244 EXPORT_SYMBOL(sun4i_frontend_update_buffer);
 245
 246 static int
 247 sun4i_frontend_drm_format_to_input_fmt(const struct drm_format_info *format,
 248                                        u32 *val)
 249 {
 250         if (!format->is_yuv)
 251                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB;
 252         else if (drm_format_info_is_yuv_sampling_411(format))
 253                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV411;
 254         else if (drm_format_info_is_yuv_sampling_420(format))
 255                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV420;
 256         else if (drm_format_info_is_yuv_sampling_422(format))
 257                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV422;
 258         else if (drm_format_info_is_yuv_sampling_444(format))
 259                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV444;
 260         else
 261                 return -EINVAL;
 262
 263         return 0;
 264 }
 265
 266 static int
 267 sun4i_frontend_drm_format_to_input_mode(const struct drm_format_info *format,
 268                                         uint64_t modifier, u32 *val)
 269 {
 270         bool tiled = (modifier == DRM_FORMAT_MOD_ALLWINNER_TILED);
 271
 272         switch (format->num_planes) {
 273         case 1:
 274                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PACKED;
 275                 return 0;
 276
 277         case 2:
 278                 *val = tiled ? SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_MB32_SEMIPLANAR
 279                              : SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_SEMIPLANAR;
 280                 return 0;
 281
 282         case 3:
 283                 *val = tiled ? SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_MB32_PLANAR
 284                              : SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PLANAR;
 285                 return 0;
 286
 287         default:
 288                 return -EINVAL;
 289         }
 290 }
 291
 292 static int
 293 sun4i_frontend_drm_format_to_input_sequence(const struct drm_format_info *format,
 294                                             u32 *val)
 295 {
 296         /* Planar formats have an explicit input sequence. */
 297         if (drm_format_info_is_yuv_planar(format)) {
 298                 *val = 0;
 299                 return 0;
 300         }
 301
 302         switch (format->format) {
 303         case DRM_FORMAT_BGRX8888:
 304                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX;
 305                 return 0;
 306
 307         case DRM_FORMAT_NV12:
 308                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UV;
 309                 return 0;
 310
 311         case DRM_FORMAT_NV16:
 312                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UV;
 313                 return 0;
 314
 315         case DRM_FORMAT_NV21:
 316                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VU;
 317                 return 0;
 318
 319         case DRM_FORMAT_NV61:
 320                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VU;
 321                 return 0;
 322
 323         case DRM_FORMAT_UYVY:
 324                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UYVY;
 325                 return 0;
 326
 327         case DRM_FORMAT_VYUY:
 328                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VYUY;
 329                 return 0;
 330
 331         case DRM_FORMAT_XRGB8888:
 332                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB;
 333                 return 0;
 334
 335         case DRM_FORMAT_YUYV:
 336                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YUYV;
 337                 return 0;
 338
 339         case DRM_FORMAT_YVYU:
 340                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YVYU;
 341                 return 0;
 342
 343         default:
 344                 return -EINVAL;
 345         }
 346 }
 347
 348 static int sun4i_frontend_drm_format_to_output_fmt(uint32_t fmt, u32 *val)
 349 {
 350         switch (fmt) {
 351         case DRM_FORMAT_BGRX8888:
 352                 *val = SUN4I_FRONTEND_OUTPUT_FMT_DATA_FMT_BGRX8888;
 353                 return 0;
 354
 355         case DRM_FORMAT_XRGB8888:
 356                 *val = SUN4I_FRONTEND_OUTPUT_FMT_DATA_FMT_XRGB8888;
 357                 return 0;
 358
 359         default:
 360                 return -EINVAL;
 361         }
 362 }
 363
 364 static const uint32_t sun4i_frontend_formats[] = {
 365         DRM_FORMAT_BGRX8888,
 366         DRM_FORMAT_NV12,
 367         DRM_FORMAT_NV16,
 368         DRM_FORMAT_NV21,
 369         DRM_FORMAT_NV61,
 370         DRM_FORMAT_UYVY,
 371         DRM_FORMAT_VYUY,
 372         DRM_FORMAT_XRGB8888,
 373         DRM_FORMAT_YUV411,
 374         DRM_FORMAT_YUV420,
 375         DRM_FORMAT_YUV422,
 376         DRM_FORMAT_YUV444,
 377         DRM_FORMAT_YUYV,
 378         DRM_FORMAT_YVU411,
 379         DRM_FORMAT_YVU420,
 380         DRM_FORMAT_YVU422,
 381         DRM_FORMAT_YVU444,
 382         DRM_FORMAT_YVYU,
 383 };
 384
 385 bool sun4i_frontend_format_is_supported(uint32_t fmt, uint64_t modifier)
 386 {
 387         unsigned int i;
 388
 389         if (modifier == DRM_FORMAT_MOD_ALLWINNER_TILED)
 390                 return sun4i_frontend_format_supports_tiling(fmt);
 391         else if (modifier != DRM_FORMAT_MOD_LINEAR)
 392                 return false;
 393
 394         for (i = 0; i < ARRAY_SIZE(sun4i_frontend_formats); i++)
 395                 if (sun4i_frontend_formats[i] == fmt)
 396                         return true;
 397
 398         return false;
 399 }
 400 EXPORT_SYMBOL(sun4i_frontend_format_is_supported);
 401
 402 int sun4i_frontend_update_formats(struct sun4i_frontend *frontend,
 403                                   struct drm_plane *plane, uint32_t out_fmt)
 404 {
 405         struct drm_plane_state *state = plane->state;
 406         struct drm_framebuffer *fb = state->fb;
 407         const struct drm_format_info *format = fb->format;
 408         uint64_t modifier = fb->modifier;
 409         unsigned int ch1_phase_idx;
 410         u32 out_fmt_val;
 411         u32 in_fmt_val, in_mod_val, in_ps_val;
 412         unsigned int i;
 413         u32 bypass;
 414         int ret;
 415
 416         ret = sun4i_frontend_drm_format_to_input_fmt(format, &in_fmt_val);
 417         if (ret) {
 418                 DRM_DEBUG_DRIVER("Invalid input format\n");
 419                 return ret;
 420         }
 421
 422         ret = sun4i_frontend_drm_format_to_input_mode(format, modifier,
 423                                                       &in_mod_val);
 424         if (ret) {
 425                 DRM_DEBUG_DRIVER("Invalid input mode\n");
 426                 return ret;
 427         }
 428
 429         ret = sun4i_frontend_drm_format_to_input_sequence(format, &in_ps_val);
 430         if (ret) {
 431                 DRM_DEBUG_DRIVER("Invalid pixel sequence\n");
 432                 return ret;
 433         }
 434
 435         ret = sun4i_frontend_drm_format_to_output_fmt(out_fmt, &out_fmt_val);
 436         if (ret) {
 437                 DRM_DEBUG_DRIVER("Invalid output format\n");
 438                 return ret;
 439         }
 440
 441         /*
 442          * I have no idea what this does exactly, but it seems to be
 443          * related to the scaler FIR filter phase parameters.
 444          */
 445         ch1_phase_idx = (format->num_planes > 1) ? 1 : 0;
 446         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZPHASE_REG,
 447                      frontend->data->ch_phase[0]);
 448         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZPHASE_REG,
 449                      frontend->data->ch_phase[ch1_phase_idx]);
 450         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE0_REG,
 451                      frontend->data->ch_phase[0]);
 452         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE0_REG,
 453                      frontend->data->ch_phase[ch1_phase_idx]);
 454         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE1_REG,
 455                      frontend->data->ch_phase[0]);
 456         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE1_REG,
 457                      frontend->data->ch_phase[ch1_phase_idx]);
 458
 459         /*
 460          * Checking the input format is sufficient since we currently only
 461          * support RGB output formats to the backend. If YUV output formats
 462          * ever get supported, an YUV input and output would require bypassing
 463          * the CSC engine too.
 464          */
 465         if (format->is_yuv) {
 466                 /* Setup the CSC engine for YUV to RGB conversion. */
 467                 bypass = 0;
 468
 469                 for (i = 0; i < ARRAY_SIZE(sunxi_bt601_yuv2rgb_coef); i++)
 470                         regmap_write(frontend->regs,
 471                                      SUN4I_FRONTEND_CSC_COEF_REG(i),
 472                                      sunxi_bt601_yuv2rgb_coef[i]);
 473         } else {
 474                 bypass = SUN4I_FRONTEND_BYPASS_CSC_EN;
 475         }
 476
 477         regmap_update_bits(frontend->regs, SUN4I_FRONTEND_BYPASS_REG,
 478                            SUN4I_FRONTEND_BYPASS_CSC_EN, bypass);
 479
 480         regmap_write(frontend->regs, SUN4I_FRONTEND_INPUT_FMT_REG,
 481                      in_mod_val | in_fmt_val | in_ps_val);
 482
 483         /*
 484          * TODO: It look like the A31 and A80 at least will need the
 485          * bit 7 (ALPHA_EN) enabled when using a format with alpha (so
 486          * ARGB8888).
 487          */
 488         regmap_write(frontend->regs, SUN4I_FRONTEND_OUTPUT_FMT_REG,
 489                      out_fmt_val);
 490
 491         return 0;
 492 }
 493 EXPORT_SYMBOL(sun4i_frontend_update_formats);
 494
 495 void sun4i_frontend_update_coord(struct sun4i_frontend *frontend,
 496                                  struct drm_plane *plane)
 497 {
 498         struct drm_plane_state *state = plane->state;
 499         struct drm_framebuffer *fb = state->fb;
 500         uint32_t luma_width, luma_height;
 501         uint32_t chroma_width, chroma_height;
 502
 503         /* Set height and width */
 504         DRM_DEBUG_DRIVER("Frontend size W: %u H: %u\n",
 505                          state->crtc_w, state->crtc_h);
 506
 507         luma_width = state->src_w >> 16;
 508         luma_height = state->src_h >> 16;
 509
 510         chroma_width = DIV_ROUND_UP(luma_width, fb->format->hsub);
 511         chroma_height = DIV_ROUND_UP(luma_height, fb->format->vsub);
 512
 513         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_INSIZE_REG,
 514                      SUN4I_FRONTEND_INSIZE(luma_height, luma_width));
 515         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_INSIZE_REG,
 516                      SUN4I_FRONTEND_INSIZE(chroma_height, chroma_width));
 517
 518         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_OUTSIZE_REG,
 519                      SUN4I_FRONTEND_OUTSIZE(state->crtc_h, state->crtc_w));
 520         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_OUTSIZE_REG,
 521                      SUN4I_FRONTEND_OUTSIZE(state->crtc_h, state->crtc_w));
 522
 523         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZFACT_REG,
 524                      (luma_width << 16) / state->crtc_w);
 525         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZFACT_REG,
 526                      (chroma_width << 16) / state->crtc_w);
 527
 528         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTFACT_REG,
 529                      (luma_height << 16) / state->crtc_h);
 530         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTFACT_REG,
 531                      (chroma_height << 16) / state->crtc_h);
 532
 533         regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG,
 534                           SUN4I_FRONTEND_FRM_CTRL_REG_RDY,
 535                           SUN4I_FRONTEND_FRM_CTRL_REG_RDY);
 536 }
 537 EXPORT_SYMBOL(sun4i_frontend_update_coord);
 538
 539 int sun4i_frontend_enable(struct sun4i_frontend *frontend)
 540 {
 541         regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG,
 542                           SUN4I_FRONTEND_FRM_CTRL_FRM_START,
 543                           SUN4I_FRONTEND_FRM_CTRL_FRM_START);
 544
 545         return 0;
 546 }
 547 EXPORT_SYMBOL(sun4i_frontend_enable);
 548
 549 static const struct regmap_config sun4i_frontend_regmap_config = {
 550         .reg_bits       = 32,
 551         .val_bits       = 32,
 552         .reg_stride     = 4,
 553         .max_register   = 0x0a14,
 554 };
 555
 556 static int sun4i_frontend_bind(struct device *dev, struct device *master,
 557                          void *data)
 558 {
 559         struct platform_device *pdev = to_platform_device(dev);
 560         struct sun4i_frontend *frontend;
 561         struct drm_device *drm = data;
 562         struct sun4i_drv *drv = drm->dev_private;
 563         void __iomem *regs;
 564
 565         frontend = devm_kzalloc(dev, sizeof(*frontend), GFP_KERNEL);
 566         if (!frontend)
 567                 return -ENOMEM;
 568
 569         dev_set_drvdata(dev, frontend);
 570         frontend->dev = dev;
 571         frontend->node = dev->of_node;
 572
 573         frontend->data = of_device_get_match_data(dev);
 574         if (!frontend->data)
 575                 return -ENODEV;
 576
 577         regs = devm_platform_ioremap_resource(pdev, 0);
 578         if (IS_ERR(regs))
 579                 return PTR_ERR(regs);
 580
 581         frontend->regs = devm_regmap_init_mmio(dev, regs,
 582                                                &sun4i_frontend_regmap_config);
 583         if (IS_ERR(frontend->regs)) {
 584                 dev_err(dev, "Couldn't create the frontend regmap\n");
 585                 return PTR_ERR(frontend->regs);
 586         }
 587
 588         frontend->reset = devm_reset_control_get(dev, NULL);
 589         if (IS_ERR(frontend->reset)) {
 590                 dev_err(dev, "Couldn't get our reset line\n");
 591                 return PTR_ERR(frontend->reset);
 592         }
 593
 594         frontend->bus_clk = devm_clk_get(dev, "ahb");
 595         if (IS_ERR(frontend->bus_clk)) {
 596                 dev_err(dev, "Couldn't get our bus clock\n");
 597                 return PTR_ERR(frontend->bus_clk);
 598         }
 599
 600         frontend->mod_clk = devm_clk_get(dev, "mod");
 601         if (IS_ERR(frontend->mod_clk)) {
 602                 dev_err(dev, "Couldn't get our mod clock\n");
 603                 return PTR_ERR(frontend->mod_clk);
 604         }
 605
 606         frontend->ram_clk = devm_clk_get(dev, "ram");
 607         if (IS_ERR(frontend->ram_clk)) {
 608                 dev_err(dev, "Couldn't get our ram clock\n");
 609                 return PTR_ERR(frontend->ram_clk);
 610         }
 611
 612         list_add_tail(&frontend->list, &drv->frontend_list);
 613         pm_runtime_enable(dev);
 614
 615         return 0;
 616 }
 617
 618 static void sun4i_frontend_unbind(struct device *dev, struct device *master,
 619                             void *data)
 620 {
 621         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 622
 623         list_del(&frontend->list);
 624         pm_runtime_force_suspend(dev);
 625 }
 626
 627 static const struct component_ops sun4i_frontend_ops = {
 628         .bind   = sun4i_frontend_bind,
 629         .unbind = sun4i_frontend_unbind,
 630 };
 631
 632 static int sun4i_frontend_probe(struct platform_device *pdev)
 633 {
 634         return component_add(&pdev->dev, &sun4i_frontend_ops);
 635 }
 636
 637 static void sun4i_frontend_remove(struct platform_device *pdev)
 638 {
 639         component_del(&pdev->dev, &sun4i_frontend_ops);
 640 }
 641
 642 static int sun4i_frontend_runtime_resume(struct device *dev)
 643 {
 644         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 645         int ret;
 646
 647         clk_set_rate(frontend->mod_clk, 300000000);
 648
 649         clk_prepare_enable(frontend->bus_clk);
 650         clk_prepare_enable(frontend->mod_clk);
 651         clk_prepare_enable(frontend->ram_clk);
 652
 653         ret = reset_control_reset(frontend->reset);
 654         if (ret) {
 655                 dev_err(dev, "Couldn't reset our device\n");
 656                 return ret;
 657         }
 658
 659         regmap_update_bits(frontend->regs, SUN4I_FRONTEND_EN_REG,
 660                            SUN4I_FRONTEND_EN_EN,
 661                            SUN4I_FRONTEND_EN_EN);
 662
 663         sun4i_frontend_scaler_init(frontend);
 664
 665         return 0;
 666 }
 667
 668 static int sun4i_frontend_runtime_suspend(struct device *dev)
 669 {
 670         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 671
 672         clk_disable_unprepare(frontend->ram_clk);
 673         clk_disable_unprepare(frontend->mod_clk);
 674         clk_disable_unprepare(frontend->bus_clk);
 675
 676         reset_control_assert(frontend->reset);
 677
 678         return 0;
 679 }
 680
 681 static const struct dev_pm_ops sun4i_frontend_pm_ops = {
 682         .runtime_resume         = sun4i_frontend_runtime_resume,
 683         .runtime_suspend        = sun4i_frontend_runtime_suspend,
 684 };
 685
 686 static const struct sun4i_frontend_data sun4i_a10_frontend = {
 687         .ch_phase               = { 0x000, 0xfc000 },
 688         .has_coef_rdy           = true,
 689 };
 690
 691 static const struct sun4i_frontend_data sun8i_a33_frontend = {
 692         .ch_phase               = { 0x400, 0xfc400 },
 693         .has_coef_access_ctrl   = true,
 694 };
 695
 696 const struct of_device_id sun4i_frontend_of_table[] = {
 697         {
 698                 .compatible = "allwinner,sun4i-a10-display-frontend",
 699                 .data = &sun4i_a10_frontend
 700         },
 701         {
 702                 .compatible = "allwinner,sun7i-a20-display-frontend",
 703                 .data = &sun4i_a10_frontend
 704         },
 705         {
 706                 .compatible = "allwinner,sun8i-a23-display-frontend",
 707                 .data = &sun8i_a33_frontend
 708         },
 709         {
 710                 .compatible = "allwinner,sun8i-a33-display-frontend",
 711                 .data = &sun8i_a33_frontend
 712         },
 713         { }
 714 };
 715 EXPORT_SYMBOL(sun4i_frontend_of_table);
 716 MODULE_DEVICE_TABLE(of, sun4i_frontend_of_table);
 717
 718 static struct platform_driver sun4i_frontend_driver = {
 719         .probe          = sun4i_frontend_probe,
 720         .remove         = sun4i_frontend_remove,
 721         .driver         = {
 722                 .name           = "sun4i-frontend",
 723                 .of_match_table = sun4i_frontend_of_table,
 724                 .pm             = &sun4i_frontend_pm_ops,
 725         },
 726 };
 727 module_platform_driver(sun4i_frontend_driver);
 728
 729 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
 730 MODULE_DESCRIPTION("Allwinner A10 Display Engine Frontend Driver");
 731 MODULE_LICENSE("GPL");