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_device.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_cma_helper.h>
  18 #include <drm/drm_fourcc.h>
  19 #include <drm/drm_framebuffer.h>
  20 #include <drm/drm_gem_cma_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 paddr;
 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         paddr = drm_fb_cma_get_gem_addr(fb, state, 0);
 225         paddr -= PHYS_OFFSET;
 226         DRM_DEBUG_DRIVER("Setting buffer #0 address to %pad\n", &paddr);
 227         regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR0_REG, paddr);
 228
 229         if (fb->format->num_planes > 1) {
 230                 paddr = drm_fb_cma_get_gem_addr(fb, state, swap ? 2 : 1);
 231                 paddr -= PHYS_OFFSET;
 232                 DRM_DEBUG_DRIVER("Setting buffer #1 address to %pad\n", &paddr);
 233                 regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR1_REG,
 234                              paddr);
 235         }
 236
 237         if (fb->format->num_planes > 2) {
 238                 paddr = drm_fb_cma_get_gem_addr(fb, state, swap ? 1 : 2);
 239                 paddr -= PHYS_OFFSET;
 240                 DRM_DEBUG_DRIVER("Setting buffer #2 address to %pad\n", &paddr);
 241                 regmap_write(frontend->regs, SUN4I_FRONTEND_BUF_ADDR2_REG,
 242                              paddr);
 243         }
 244 }
 245 EXPORT_SYMBOL(sun4i_frontend_update_buffer);
 246
 247 static int
 248 sun4i_frontend_drm_format_to_input_fmt(const struct drm_format_info *format,
 249                                        u32 *val)
 250 {
 251         if (!format->is_yuv)
 252                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_RGB;
 253         else if (drm_format_info_is_yuv_sampling_411(format))
 254                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV411;
 255         else if (drm_format_info_is_yuv_sampling_420(format))
 256                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV420;
 257         else if (drm_format_info_is_yuv_sampling_422(format))
 258                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV422;
 259         else if (drm_format_info_is_yuv_sampling_444(format))
 260                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_FMT_YUV444;
 261         else
 262                 return -EINVAL;
 263
 264         return 0;
 265 }
 266
 267 static int
 268 sun4i_frontend_drm_format_to_input_mode(const struct drm_format_info *format,
 269                                         uint64_t modifier, u32 *val)
 270 {
 271         bool tiled = (modifier == DRM_FORMAT_MOD_ALLWINNER_TILED);
 272
 273         switch (format->num_planes) {
 274         case 1:
 275                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PACKED;
 276                 return 0;
 277
 278         case 2:
 279                 *val = tiled ? SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_MB32_SEMIPLANAR
 280                              : SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_SEMIPLANAR;
 281                 return 0;
 282
 283         case 3:
 284                 *val = tiled ? SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_MB32_PLANAR
 285                              : SUN4I_FRONTEND_INPUT_FMT_DATA_MOD_PLANAR;
 286                 return 0;
 287
 288         default:
 289                 return -EINVAL;
 290         }
 291 }
 292
 293 static int
 294 sun4i_frontend_drm_format_to_input_sequence(const struct drm_format_info *format,
 295                                             u32 *val)
 296 {
 297         /* Planar formats have an explicit input sequence. */
 298         if (drm_format_info_is_yuv_planar(format)) {
 299                 *val = 0;
 300                 return 0;
 301         }
 302
 303         switch (format->format) {
 304         case DRM_FORMAT_BGRX8888:
 305                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_BGRX;
 306                 return 0;
 307
 308         case DRM_FORMAT_NV12:
 309                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UV;
 310                 return 0;
 311
 312         case DRM_FORMAT_NV16:
 313                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UV;
 314                 return 0;
 315
 316         case DRM_FORMAT_NV21:
 317                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VU;
 318                 return 0;
 319
 320         case DRM_FORMAT_NV61:
 321                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VU;
 322                 return 0;
 323
 324         case DRM_FORMAT_UYVY:
 325                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_UYVY;
 326                 return 0;
 327
 328         case DRM_FORMAT_VYUY:
 329                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_VYUY;
 330                 return 0;
 331
 332         case DRM_FORMAT_XRGB8888:
 333                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_XRGB;
 334                 return 0;
 335
 336         case DRM_FORMAT_YUYV:
 337                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YUYV;
 338                 return 0;
 339
 340         case DRM_FORMAT_YVYU:
 341                 *val = SUN4I_FRONTEND_INPUT_FMT_DATA_PS_YVYU;
 342                 return 0;
 343
 344         default:
 345                 return -EINVAL;
 346         }
 347 }
 348
 349 static int sun4i_frontend_drm_format_to_output_fmt(uint32_t fmt, u32 *val)
 350 {
 351         switch (fmt) {
 352         case DRM_FORMAT_BGRX8888:
 353                 *val = SUN4I_FRONTEND_OUTPUT_FMT_DATA_FMT_BGRX8888;
 354                 return 0;
 355
 356         case DRM_FORMAT_XRGB8888:
 357                 *val = SUN4I_FRONTEND_OUTPUT_FMT_DATA_FMT_XRGB8888;
 358                 return 0;
 359
 360         default:
 361                 return -EINVAL;
 362         }
 363 }
 364
 365 static const uint32_t sun4i_frontend_formats[] = {
 366         DRM_FORMAT_BGRX8888,
 367         DRM_FORMAT_NV12,
 368         DRM_FORMAT_NV16,
 369         DRM_FORMAT_NV21,
 370         DRM_FORMAT_NV61,
 371         DRM_FORMAT_UYVY,
 372         DRM_FORMAT_VYUY,
 373         DRM_FORMAT_XRGB8888,
 374         DRM_FORMAT_YUV411,
 375         DRM_FORMAT_YUV420,
 376         DRM_FORMAT_YUV422,
 377         DRM_FORMAT_YUV444,
 378         DRM_FORMAT_YUYV,
 379         DRM_FORMAT_YVU411,
 380         DRM_FORMAT_YVU420,
 381         DRM_FORMAT_YVU422,
 382         DRM_FORMAT_YVU444,
 383         DRM_FORMAT_YVYU,
 384 };
 385
 386 bool sun4i_frontend_format_is_supported(uint32_t fmt, uint64_t modifier)
 387 {
 388         unsigned int i;
 389
 390         if (modifier == DRM_FORMAT_MOD_ALLWINNER_TILED)
 391                 return sun4i_frontend_format_supports_tiling(fmt);
 392         else if (modifier != DRM_FORMAT_MOD_LINEAR)
 393                 return false;
 394
 395         for (i = 0; i < ARRAY_SIZE(sun4i_frontend_formats); i++)
 396                 if (sun4i_frontend_formats[i] == fmt)
 397                         return true;
 398
 399         return false;
 400 }
 401 EXPORT_SYMBOL(sun4i_frontend_format_is_supported);
 402
 403 int sun4i_frontend_update_formats(struct sun4i_frontend *frontend,
 404                                   struct drm_plane *plane, uint32_t out_fmt)
 405 {
 406         struct drm_plane_state *state = plane->state;
 407         struct drm_framebuffer *fb = state->fb;
 408         const struct drm_format_info *format = fb->format;
 409         uint64_t modifier = fb->modifier;
 410         unsigned int ch1_phase_idx;
 411         u32 out_fmt_val;
 412         u32 in_fmt_val, in_mod_val, in_ps_val;
 413         unsigned int i;
 414         u32 bypass;
 415         int ret;
 416
 417         ret = sun4i_frontend_drm_format_to_input_fmt(format, &in_fmt_val);
 418         if (ret) {
 419                 DRM_DEBUG_DRIVER("Invalid input format\n");
 420                 return ret;
 421         }
 422
 423         ret = sun4i_frontend_drm_format_to_input_mode(format, modifier,
 424                                                       &in_mod_val);
 425         if (ret) {
 426                 DRM_DEBUG_DRIVER("Invalid input mode\n");
 427                 return ret;
 428         }
 429
 430         ret = sun4i_frontend_drm_format_to_input_sequence(format, &in_ps_val);
 431         if (ret) {
 432                 DRM_DEBUG_DRIVER("Invalid pixel sequence\n");
 433                 return ret;
 434         }
 435
 436         ret = sun4i_frontend_drm_format_to_output_fmt(out_fmt, &out_fmt_val);
 437         if (ret) {
 438                 DRM_DEBUG_DRIVER("Invalid output format\n");
 439                 return ret;
 440         }
 441
 442         /*
 443          * I have no idea what this does exactly, but it seems to be
 444          * related to the scaler FIR filter phase parameters.
 445          */
 446         ch1_phase_idx = (format->num_planes > 1) ? 1 : 0;
 447         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZPHASE_REG,
 448                      frontend->data->ch_phase[0]);
 449         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZPHASE_REG,
 450                      frontend->data->ch_phase[ch1_phase_idx]);
 451         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE0_REG,
 452                      frontend->data->ch_phase[0]);
 453         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE0_REG,
 454                      frontend->data->ch_phase[ch1_phase_idx]);
 455         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTPHASE1_REG,
 456                      frontend->data->ch_phase[0]);
 457         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTPHASE1_REG,
 458                      frontend->data->ch_phase[ch1_phase_idx]);
 459
 460         /*
 461          * Checking the input format is sufficient since we currently only
 462          * support RGB output formats to the backend. If YUV output formats
 463          * ever get supported, an YUV input and output would require bypassing
 464          * the CSC engine too.
 465          */
 466         if (format->is_yuv) {
 467                 /* Setup the CSC engine for YUV to RGB conversion. */
 468                 bypass = 0;
 469
 470                 for (i = 0; i < ARRAY_SIZE(sunxi_bt601_yuv2rgb_coef); i++)
 471                         regmap_write(frontend->regs,
 472                                      SUN4I_FRONTEND_CSC_COEF_REG(i),
 473                                      sunxi_bt601_yuv2rgb_coef[i]);
 474         } else {
 475                 bypass = SUN4I_FRONTEND_BYPASS_CSC_EN;
 476         }
 477
 478         regmap_update_bits(frontend->regs, SUN4I_FRONTEND_BYPASS_REG,
 479                            SUN4I_FRONTEND_BYPASS_CSC_EN, bypass);
 480
 481         regmap_write(frontend->regs, SUN4I_FRONTEND_INPUT_FMT_REG,
 482                      in_mod_val | in_fmt_val | in_ps_val);
 483
 484         /*
 485          * TODO: It look like the A31 and A80 at least will need the
 486          * bit 7 (ALPHA_EN) enabled when using a format with alpha (so
 487          * ARGB8888).
 488          */
 489         regmap_write(frontend->regs, SUN4I_FRONTEND_OUTPUT_FMT_REG,
 490                      out_fmt_val);
 491
 492         return 0;
 493 }
 494 EXPORT_SYMBOL(sun4i_frontend_update_formats);
 495
 496 void sun4i_frontend_update_coord(struct sun4i_frontend *frontend,
 497                                  struct drm_plane *plane)
 498 {
 499         struct drm_plane_state *state = plane->state;
 500         struct drm_framebuffer *fb = state->fb;
 501         uint32_t luma_width, luma_height;
 502         uint32_t chroma_width, chroma_height;
 503
 504         /* Set height and width */
 505         DRM_DEBUG_DRIVER("Frontend size W: %u H: %u\n",
 506                          state->crtc_w, state->crtc_h);
 507
 508         luma_width = state->src_w >> 16;
 509         luma_height = state->src_h >> 16;
 510
 511         chroma_width = DIV_ROUND_UP(luma_width, fb->format->hsub);
 512         chroma_height = DIV_ROUND_UP(luma_height, fb->format->vsub);
 513
 514         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_INSIZE_REG,
 515                      SUN4I_FRONTEND_INSIZE(luma_height, luma_width));
 516         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_INSIZE_REG,
 517                      SUN4I_FRONTEND_INSIZE(chroma_height, chroma_width));
 518
 519         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_OUTSIZE_REG,
 520                      SUN4I_FRONTEND_OUTSIZE(state->crtc_h, state->crtc_w));
 521         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_OUTSIZE_REG,
 522                      SUN4I_FRONTEND_OUTSIZE(state->crtc_h, state->crtc_w));
 523
 524         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_HORZFACT_REG,
 525                      (luma_width << 16) / state->crtc_w);
 526         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_HORZFACT_REG,
 527                      (chroma_width << 16) / state->crtc_w);
 528
 529         regmap_write(frontend->regs, SUN4I_FRONTEND_CH0_VERTFACT_REG,
 530                      (luma_height << 16) / state->crtc_h);
 531         regmap_write(frontend->regs, SUN4I_FRONTEND_CH1_VERTFACT_REG,
 532                      (chroma_height << 16) / state->crtc_h);
 533
 534         regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG,
 535                           SUN4I_FRONTEND_FRM_CTRL_REG_RDY,
 536                           SUN4I_FRONTEND_FRM_CTRL_REG_RDY);
 537 }
 538 EXPORT_SYMBOL(sun4i_frontend_update_coord);
 539
 540 int sun4i_frontend_enable(struct sun4i_frontend *frontend)
 541 {
 542         regmap_write_bits(frontend->regs, SUN4I_FRONTEND_FRM_CTRL_REG,
 543                           SUN4I_FRONTEND_FRM_CTRL_FRM_START,
 544                           SUN4I_FRONTEND_FRM_CTRL_FRM_START);
 545
 546         return 0;
 547 }
 548 EXPORT_SYMBOL(sun4i_frontend_enable);
 549
 550 static const struct regmap_config sun4i_frontend_regmap_config = {
 551         .reg_bits       = 32,
 552         .val_bits       = 32,
 553         .reg_stride     = 4,
 554         .max_register   = 0x0a14,
 555 };
 556
 557 static int sun4i_frontend_bind(struct device *dev, struct device *master,
 558                          void *data)
 559 {
 560         struct platform_device *pdev = to_platform_device(dev);
 561         struct sun4i_frontend *frontend;
 562         struct drm_device *drm = data;
 563         struct sun4i_drv *drv = drm->dev_private;
 564         void __iomem *regs;
 565
 566         frontend = devm_kzalloc(dev, sizeof(*frontend), GFP_KERNEL);
 567         if (!frontend)
 568                 return -ENOMEM;
 569
 570         dev_set_drvdata(dev, frontend);
 571         frontend->dev = dev;
 572         frontend->node = dev->of_node;
 573
 574         frontend->data = of_device_get_match_data(dev);
 575         if (!frontend->data)
 576                 return -ENODEV;
 577
 578         regs = devm_platform_ioremap_resource(pdev, 0);
 579         if (IS_ERR(regs))
 580                 return PTR_ERR(regs);
 581
 582         frontend->regs = devm_regmap_init_mmio(dev, regs,
 583                                                &sun4i_frontend_regmap_config);
 584         if (IS_ERR(frontend->regs)) {
 585                 dev_err(dev, "Couldn't create the frontend regmap\n");
 586                 return PTR_ERR(frontend->regs);
 587         }
 588
 589         frontend->reset = devm_reset_control_get(dev, NULL);
 590         if (IS_ERR(frontend->reset)) {
 591                 dev_err(dev, "Couldn't get our reset line\n");
 592                 return PTR_ERR(frontend->reset);
 593         }
 594
 595         frontend->bus_clk = devm_clk_get(dev, "ahb");
 596         if (IS_ERR(frontend->bus_clk)) {
 597                 dev_err(dev, "Couldn't get our bus clock\n");
 598                 return PTR_ERR(frontend->bus_clk);
 599         }
 600
 601         frontend->mod_clk = devm_clk_get(dev, "mod");
 602         if (IS_ERR(frontend->mod_clk)) {
 603                 dev_err(dev, "Couldn't get our mod clock\n");
 604                 return PTR_ERR(frontend->mod_clk);
 605         }
 606
 607         frontend->ram_clk = devm_clk_get(dev, "ram");
 608         if (IS_ERR(frontend->ram_clk)) {
 609                 dev_err(dev, "Couldn't get our ram clock\n");
 610                 return PTR_ERR(frontend->ram_clk);
 611         }
 612
 613         list_add_tail(&frontend->list, &drv->frontend_list);
 614         pm_runtime_enable(dev);
 615
 616         return 0;
 617 }
 618
 619 static void sun4i_frontend_unbind(struct device *dev, struct device *master,
 620                             void *data)
 621 {
 622         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 623
 624         list_del(&frontend->list);
 625         pm_runtime_force_suspend(dev);
 626 }
 627
 628 static const struct component_ops sun4i_frontend_ops = {
 629         .bind   = sun4i_frontend_bind,
 630         .unbind = sun4i_frontend_unbind,
 631 };
 632
 633 static int sun4i_frontend_probe(struct platform_device *pdev)
 634 {
 635         return component_add(&pdev->dev, &sun4i_frontend_ops);
 636 }
 637
 638 static int sun4i_frontend_remove(struct platform_device *pdev)
 639 {
 640         component_del(&pdev->dev, &sun4i_frontend_ops);
 641
 642         return 0;
 643 }
 644
 645 static int sun4i_frontend_runtime_resume(struct device *dev)
 646 {
 647         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 648         int ret;
 649
 650         clk_set_rate(frontend->mod_clk, 300000000);
 651
 652         clk_prepare_enable(frontend->bus_clk);
 653         clk_prepare_enable(frontend->mod_clk);
 654         clk_prepare_enable(frontend->ram_clk);
 655
 656         ret = reset_control_reset(frontend->reset);
 657         if (ret) {
 658                 dev_err(dev, "Couldn't reset our device\n");
 659                 return ret;
 660         }
 661
 662         regmap_update_bits(frontend->regs, SUN4I_FRONTEND_EN_REG,
 663                            SUN4I_FRONTEND_EN_EN,
 664                            SUN4I_FRONTEND_EN_EN);
 665
 666         sun4i_frontend_scaler_init(frontend);
 667
 668         return 0;
 669 }
 670
 671 static int sun4i_frontend_runtime_suspend(struct device *dev)
 672 {
 673         struct sun4i_frontend *frontend = dev_get_drvdata(dev);
 674
 675         clk_disable_unprepare(frontend->ram_clk);
 676         clk_disable_unprepare(frontend->mod_clk);
 677         clk_disable_unprepare(frontend->bus_clk);
 678
 679         reset_control_assert(frontend->reset);
 680
 681         return 0;
 682 }
 683
 684 static const struct dev_pm_ops sun4i_frontend_pm_ops = {
 685         .runtime_resume         = sun4i_frontend_runtime_resume,
 686         .runtime_suspend        = sun4i_frontend_runtime_suspend,
 687 };
 688
 689 static const struct sun4i_frontend_data sun4i_a10_frontend = {
 690         .ch_phase               = { 0x000, 0xfc000 },
 691         .has_coef_rdy           = true,
 692 };
 693
 694 static const struct sun4i_frontend_data sun8i_a33_frontend = {
 695         .ch_phase               = { 0x400, 0xfc400 },
 696         .has_coef_access_ctrl   = true,
 697 };
 698
 699 const struct of_device_id sun4i_frontend_of_table[] = {
 700         {
 701                 .compatible = "allwinner,sun4i-a10-display-frontend",
 702                 .data = &sun4i_a10_frontend
 703         },
 704         {
 705                 .compatible = "allwinner,sun7i-a20-display-frontend",
 706                 .data = &sun4i_a10_frontend
 707         },
 708         {
 709                 .compatible = "allwinner,sun8i-a23-display-frontend",
 710                 .data = &sun8i_a33_frontend
 711         },
 712         {
 713                 .compatible = "allwinner,sun8i-a33-display-frontend",
 714                 .data = &sun8i_a33_frontend
 715         },
 716         { }
 717 };
 718 EXPORT_SYMBOL(sun4i_frontend_of_table);
 719 MODULE_DEVICE_TABLE(of, sun4i_frontend_of_table);
 720
 721 static struct platform_driver sun4i_frontend_driver = {
 722         .probe          = sun4i_frontend_probe,
 723         .remove         = sun4i_frontend_remove,
 724         .driver         = {
 725                 .name           = "sun4i-frontend",
 726                 .of_match_table = sun4i_frontend_of_table,
 727                 .pm             = &sun4i_frontend_pm_ops,
 728         },
 729 };
 730 module_platform_driver(sun4i_frontend_driver);
 731
 732 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
 733 MODULE_DESCRIPTION("Allwinner A10 Display Engine Frontend Driver");
 734 MODULE_LICENSE("GPL");