drivers/video/sunxi_display.c

   1 /*
   2  * Display driver for Allwinner SoCs.
   3  *
   4  * (C) Copyright 2013-2014 Luc Verhaegen <libv@skynet.be>
   5  * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/display.h>
  14 #include <asm/global_data.h>
  15 #include <asm/io.h>
  16 #include <errno.h>
  17 #include <fdtdec.h>
  18 #include <fdt_support.h>
  19 #include <video_fb.h>
  20 #include "videomodes.h"
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 enum sunxi_monitor {
  25         sunxi_monitor_none,
  26         sunxi_monitor_dvi,
  27         sunxi_monitor_hdmi,
  28         sunxi_monitor_lcd,
  29         sunxi_monitor_vga,
  30 };
  31 #define SUNXI_MONITOR_LAST sunxi_monitor_vga
  32
  33 struct sunxi_display {
  34         GraphicDevice graphic_device;
  35         bool enabled;
  36         enum sunxi_monitor monitor;
  37 } sunxi_display;
  38
  39 /*
  40  * Wait up to 200ms for value to be set in given part of reg.
  41  */
  42 static int await_completion(u32 *reg, u32 mask, u32 val)
  43 {
  44         unsigned long tmo = timer_get_us() + 200000;
  45
  46         while ((readl(reg) & mask) != val) {
  47                 if (timer_get_us() > tmo) {
  48                         printf("DDC: timeout reading EDID\n");
  49                         return -ETIME;
  50                 }
  51         }
  52         return 0;
  53 }
  54
  55 static int sunxi_hdmi_hpd_detect(void)
  56 {
  57         struct sunxi_ccm_reg * const ccm =
  58                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  59         struct sunxi_hdmi_reg * const hdmi =
  60                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
  61         unsigned long tmo = timer_get_us() + 300000;
  62
  63         /* Set pll3 to 300MHz */
  64         clock_set_pll3(300000000);
  65
  66         /* Set hdmi parent to pll3 */
  67         clrsetbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_PLL_MASK,
  68                         CCM_HDMI_CTRL_PLL3);
  69
  70         /* Set ahb gating to pass */
  71 #ifdef CONFIG_MACH_SUN6I
  72         setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI);
  73 #endif
  74         setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_HDMI);
  75
  76         /* Clock on */
  77         setbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_GATE);
  78
  79         writel(SUNXI_HDMI_CTRL_ENABLE, &hdmi->ctrl);
  80         writel(SUNXI_HDMI_PAD_CTRL0_HDP, &hdmi->pad_ctrl0);
  81
  82         while (timer_get_us() < tmo) {
  83                 if (readl(&hdmi->hpd) & SUNXI_HDMI_HPD_DETECT)
  84                         return 1;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static void sunxi_hdmi_shutdown(void)
  91 {
  92         struct sunxi_ccm_reg * const ccm =
  93                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  94         struct sunxi_hdmi_reg * const hdmi =
  95                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
  96
  97         clrbits_le32(&hdmi->ctrl, SUNXI_HDMI_CTRL_ENABLE);
  98         clrbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_GATE);
  99         clrbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_HDMI);
 100 #ifdef CONFIG_MACH_SUN6I
 101         clrbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI);
 102 #endif
 103         clock_set_pll3(0);
 104 }
 105
 106 static int sunxi_hdmi_ddc_do_command(u32 cmnd, int offset, int n)
 107 {
 108         struct sunxi_hdmi_reg * const hdmi =
 109                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 110
 111         setbits_le32(&hdmi->ddc_fifo_ctrl, SUNXI_HDMI_DDC_FIFO_CTRL_CLEAR);
 112         writel(SUNXI_HMDI_DDC_ADDR_EDDC_SEGMENT(offset >> 8) |
 113                SUNXI_HMDI_DDC_ADDR_EDDC_ADDR |
 114                SUNXI_HMDI_DDC_ADDR_OFFSET(offset) |
 115                SUNXI_HMDI_DDC_ADDR_SLAVE_ADDR, &hdmi->ddc_addr);
 116 #ifndef CONFIG_MACH_SUN6I
 117         writel(n, &hdmi->ddc_byte_count);
 118         writel(cmnd, &hdmi->ddc_cmnd);
 119 #else
 120         writel(n << 16 | cmnd, &hdmi->ddc_cmnd);
 121 #endif
 122         setbits_le32(&hdmi->ddc_ctrl, SUNXI_HMDI_DDC_CTRL_START);
 123
 124         return await_completion(&hdmi->ddc_ctrl, SUNXI_HMDI_DDC_CTRL_START, 0);
 125 }
 126
 127 static int sunxi_hdmi_ddc_read(int offset, u8 *buf, int count)
 128 {
 129         struct sunxi_hdmi_reg * const hdmi =
 130                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 131         int i, n;
 132
 133         while (count > 0) {
 134                 if (count > 16)
 135                         n = 16;
 136                 else
 137                         n = count;
 138
 139                 if (sunxi_hdmi_ddc_do_command(
 140                                 SUNXI_HDMI_DDC_CMND_EXPLICIT_EDDC_READ,
 141                                 offset, n))
 142                         return -ETIME;
 143
 144                 for (i = 0; i < n; i++)
 145                         *buf++ = readb(&hdmi->ddc_fifo_data);
 146
 147                 offset += n;
 148                 count -= n;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int sunxi_hdmi_edid_get_block(int block, u8 *buf)
 155 {
 156         int r, retries = 2;
 157
 158         do {
 159                 r = sunxi_hdmi_ddc_read(block * 128, buf, 128);
 160                 if (r)
 161                         continue;
 162                 r = edid_check_checksum(buf);
 163                 if (r) {
 164                         printf("EDID block %d: checksum error%s\n",
 165                                block, retries ? ", retrying" : "");
 166                 }
 167         } while (r && retries--);
 168
 169         return r;
 170 }
 171
 172 static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
 173 {
 174         struct edid1_info edid1;
 175         struct edid_cea861_info cea681[4];
 176         struct edid_detailed_timing *t =
 177                 (struct edid_detailed_timing *)edid1.monitor_details.timing;
 178         struct sunxi_hdmi_reg * const hdmi =
 179                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 180         struct sunxi_ccm_reg * const ccm =
 181                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 182         int i, r, ext_blocks = 0;
 183
 184         /* SUNXI_HDMI_CTRL_ENABLE & PAD_CTRL0 are already set by hpd_detect */
 185         writel(SUNXI_HDMI_PAD_CTRL1 | SUNXI_HDMI_PAD_CTRL1_HALVE,
 186                &hdmi->pad_ctrl1);
 187         writel(SUNXI_HDMI_PLL_CTRL | SUNXI_HDMI_PLL_CTRL_DIV(15),
 188                &hdmi->pll_ctrl);
 189         writel(SUNXI_HDMI_PLL_DBG0_PLL3, &hdmi->pll_dbg0);
 190
 191         /* Reset i2c controller */
 192         setbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_DDC_GATE);
 193         writel(SUNXI_HMDI_DDC_CTRL_ENABLE |
 194                SUNXI_HMDI_DDC_CTRL_SDA_ENABLE |
 195                SUNXI_HMDI_DDC_CTRL_SCL_ENABLE |
 196                SUNXI_HMDI_DDC_CTRL_RESET, &hdmi->ddc_ctrl);
 197         if (await_completion(&hdmi->ddc_ctrl, SUNXI_HMDI_DDC_CTRL_RESET, 0))
 198                 return -EIO;
 199
 200         writel(SUNXI_HDMI_DDC_CLOCK, &hdmi->ddc_clock);
 201 #ifndef CONFIG_MACH_SUN6I
 202         writel(SUNXI_HMDI_DDC_LINE_CTRL_SDA_ENABLE |
 203                SUNXI_HMDI_DDC_LINE_CTRL_SCL_ENABLE, &hdmi->ddc_line_ctrl);
 204 #endif
 205
 206         r = sunxi_hdmi_edid_get_block(0, (u8 *)&edid1);
 207         if (r == 0) {
 208                 r = edid_check_info(&edid1);
 209                 if (r) {
 210                         printf("EDID: invalid EDID data\n");
 211                         r = -EINVAL;
 212                 }
 213         }
 214         if (r == 0) {
 215                 ext_blocks = edid1.extension_flag;
 216                 if (ext_blocks > 4)
 217                         ext_blocks = 4;
 218                 for (i = 0; i < ext_blocks; i++) {
 219                         if (sunxi_hdmi_edid_get_block(1 + i,
 220                                                 (u8 *)&cea681[i]) != 0) {
 221                                 ext_blocks = i;
 222                                 break;
 223                         }
 224                 }
 225         }
 226
 227         /* Disable DDC engine, no longer needed */
 228         clrbits_le32(&hdmi->ddc_ctrl, SUNXI_HMDI_DDC_CTRL_ENABLE);
 229         clrbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_DDC_GATE);
 230
 231         if (r)
 232                 return r;
 233
 234         /* We want version 1.3 or 1.2 with detailed timing info */
 235         if (edid1.version != 1 || (edid1.revision < 3 &&
 236                         !EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(edid1))) {
 237                 printf("EDID: unsupported version %d.%d\n",
 238                        edid1.version, edid1.revision);
 239                 return -EINVAL;
 240         }
 241
 242         /* Take the first usable detailed timing */
 243         for (i = 0; i < 4; i++, t++) {
 244                 r = video_edid_dtd_to_ctfb_res_modes(t, mode);
 245                 if (r == 0)
 246                         break;
 247         }
 248         if (i == 4) {
 249                 printf("EDID: no usable detailed timing found\n");
 250                 return -ENOENT;
 251         }
 252
 253         /* Check for basic audio support, if found enable hdmi output */
 254         sunxi_display.monitor = sunxi_monitor_dvi;
 255         for (i = 0; i < ext_blocks; i++) {
 256                 if (cea681[i].extension_tag != EDID_CEA861_EXTENSION_TAG ||
 257                     cea681[i].revision < 2)
 258                         continue;
 259
 260                 if (EDID_CEA861_SUPPORTS_BASIC_AUDIO(cea681[i]))
 261                         sunxi_display.monitor = sunxi_monitor_hdmi;
 262         }
 263
 264         return 0;
 265 }
 266
 267 /*
 268  * This is the entity that mixes and matches the different layers and inputs.
 269  * Allwinner calls it the back-end, but i like composer better.
 270  */
 271 static void sunxi_composer_init(void)
 272 {
 273         struct sunxi_ccm_reg * const ccm =
 274                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 275         struct sunxi_de_be_reg * const de_be =
 276                 (struct sunxi_de_be_reg *)SUNXI_DE_BE0_BASE;
 277         int i;
 278
 279 #ifdef CONFIG_MACH_SUN6I
 280         /* Reset off */
 281         setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_DE_BE0);
 282 #endif
 283
 284         /* Clocks on */
 285         setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_DE_BE0);
 286         setbits_le32(&ccm->dram_clk_gate, 1 << CCM_DRAM_GATE_OFFSET_DE_BE0);
 287         clock_set_de_mod_clock(&ccm->be0_clk_cfg, 300000000);
 288
 289         /* Engine bug, clear registers after reset */
 290         for (i = 0x0800; i < 0x1000; i += 4)
 291                 writel(0, SUNXI_DE_BE0_BASE + i);
 292
 293         setbits_le32(&de_be->mode, SUNXI_DE_BE_MODE_ENABLE);
 294 }
 295
 296 static void sunxi_composer_mode_set(const struct ctfb_res_modes *mode,
 297                                     unsigned int address)
 298 {
 299         struct sunxi_de_be_reg * const de_be =
 300                 (struct sunxi_de_be_reg *)SUNXI_DE_BE0_BASE;
 301
 302         writel(SUNXI_DE_BE_HEIGHT(mode->yres) | SUNXI_DE_BE_WIDTH(mode->xres),
 303                &de_be->disp_size);
 304         writel(SUNXI_DE_BE_HEIGHT(mode->yres) | SUNXI_DE_BE_WIDTH(mode->xres),
 305                &de_be->layer0_size);
 306         writel(SUNXI_DE_BE_LAYER_STRIDE(mode->xres), &de_be->layer0_stride);
 307         writel(address << 3, &de_be->layer0_addr_low32b);
 308         writel(address >> 29, &de_be->layer0_addr_high4b);
 309         writel(SUNXI_DE_BE_LAYER_ATTR1_FMT_XRGB8888, &de_be->layer0_attr1_ctrl);
 310
 311         setbits_le32(&de_be->mode, SUNXI_DE_BE_MODE_LAYER0_ENABLE);
 312 }
 313
 314 static void sunxi_composer_enable(void)
 315 {
 316         struct sunxi_de_be_reg * const de_be =
 317                 (struct sunxi_de_be_reg *)SUNXI_DE_BE0_BASE;
 318
 319         setbits_le32(&de_be->reg_ctrl, SUNXI_DE_BE_REG_CTRL_LOAD_REGS);
 320         setbits_le32(&de_be->mode, SUNXI_DE_BE_MODE_START);
 321 }
 322
 323 /*
 324  * LCDC, what allwinner calls a CRTC, so timing controller and serializer.
 325  */
 326 static void sunxi_lcdc_pll_set(int dotclock, int *clk_div, int *clk_double)
 327 {
 328         struct sunxi_ccm_reg * const ccm =
 329                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 330         int value, n, m, diff;
 331         int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;
 332         int best_double = 0;
 333
 334         /*
 335          * Find the lowest divider resulting in a matching clock, if there
 336          * is no match, pick the closest lower clock, as monitors tend to
 337          * not sync to higher frequencies.
 338          */
 339         for (m = 15; m > 0; m--) {
 340                 n = (m * dotclock) / 3000;
 341
 342                 if ((n >= 9) && (n <= 127)) {
 343                         value = (3000 * n) / m;
 344                         diff = dotclock - value;
 345                         if (diff < best_diff) {
 346                                 best_diff = diff;
 347                                 best_m = m;
 348                                 best_n = n;
 349                                 best_double = 0;
 350                         }
 351                 }
 352
 353                 /* These are just duplicates */
 354                 if (!(m & 1))
 355                         continue;
 356
 357                 n = (m * dotclock) / 6000;
 358                 if ((n >= 9) && (n <= 127)) {
 359                         value = (6000 * n) / m;
 360                         diff = dotclock - value;
 361                         if (diff < best_diff) {
 362                                 best_diff = diff;
 363                                 best_m = m;
 364                                 best_n = n;
 365                                 best_double = 1;
 366                         }
 367                 }
 368         }
 369
 370         debug("dotclock: %dkHz = %dkHz: (%d * 3MHz * %d) / %d\n",
 371               dotclock, (best_double + 1) * 3000 * best_n / best_m,
 372               best_double + 1, best_n, best_m);
 373
 374         clock_set_pll3(best_n * 3000000);
 375
 376         writel(CCM_LCD_CH1_CTRL_GATE |
 377             (best_double ? CCM_LCD_CH1_CTRL_PLL3_2X : CCM_LCD_CH1_CTRL_PLL3) |
 378             CCM_LCD_CH1_CTRL_M(best_m), &ccm->lcd0_ch1_clk_cfg);
 379
 380         *clk_div = best_m;
 381         *clk_double = best_double;
 382 }
 383
 384 static void sunxi_lcdc_init(void)
 385 {
 386         struct sunxi_ccm_reg * const ccm =
 387                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 388         struct sunxi_lcdc_reg * const lcdc =
 389                 (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
 390
 391         /* Reset off */
 392 #ifdef CONFIG_MACH_SUN6I
 393         setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD0);
 394 #else
 395         setbits_le32(&ccm->lcd0_ch0_clk_cfg, CCM_LCD_CH0_CTRL_RST);
 396 #endif
 397
 398         /* Clock on */
 399         setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD0);
 400
 401         /* Init lcdc */
 402         writel(0, &lcdc->ctrl); /* Disable tcon */
 403         writel(0, &lcdc->int0); /* Disable all interrupts */
 404
 405         /* Disable tcon0 dot clock */
 406         clrbits_le32(&lcdc->tcon0_dclk, SUNXI_LCDC_TCON0_DCLK_ENABLE);
 407
 408         /* Set all io lines to tristate */
 409         writel(0xffffffff, &lcdc->tcon0_io_tristate);
 410         writel(0xffffffff, &lcdc->tcon1_io_tristate);
 411 }
 412
 413 static void sunxi_lcdc_enable(void)
 414 {
 415         struct sunxi_lcdc_reg * const lcdc =
 416                 (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
 417
 418         setbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_TCON_ENABLE);
 419 }
 420
 421 static void sunxi_lcdc_tcon1_mode_set(const struct ctfb_res_modes *mode,
 422                                       int *clk_div, int *clk_double)
 423 {
 424         struct sunxi_lcdc_reg * const lcdc =
 425                 (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
 426         int bp, total;
 427
 428         /* Use tcon1 */
 429         clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
 430                         SUNXI_LCDC_CTRL_IO_MAP_TCON1);
 431
 432         /* Enabled, 0x1e start delay */
 433         writel(SUNXI_LCDC_TCON1_CTRL_ENABLE |
 434                SUNXI_LCDC_TCON1_CTRL_CLK_DELAY(0x1e), &lcdc->tcon1_ctrl);
 435
 436         writel(SUNXI_LCDC_X(mode->xres) | SUNXI_LCDC_Y(mode->yres),
 437                &lcdc->tcon1_timing_source);
 438         writel(SUNXI_LCDC_X(mode->xres) | SUNXI_LCDC_Y(mode->yres),
 439                &lcdc->tcon1_timing_scale);
 440         writel(SUNXI_LCDC_X(mode->xres) | SUNXI_LCDC_Y(mode->yres),
 441                &lcdc->tcon1_timing_out);
 442
 443         bp = mode->hsync_len + mode->left_margin;
 444         total = mode->xres + mode->right_margin + bp;
 445         writel(SUNXI_LCDC_TCON1_TIMING_H_TOTAL(total) |
 446                SUNXI_LCDC_TCON1_TIMING_H_BP(bp), &lcdc->tcon1_timing_h);
 447
 448         bp = mode->vsync_len + mode->upper_margin;
 449         total = mode->yres + mode->lower_margin + bp;
 450         writel(SUNXI_LCDC_TCON1_TIMING_V_TOTAL(total) |
 451                SUNXI_LCDC_TCON1_TIMING_V_BP(bp), &lcdc->tcon1_timing_v);
 452
 453         writel(SUNXI_LCDC_X(mode->hsync_len) | SUNXI_LCDC_Y(mode->vsync_len),
 454                &lcdc->tcon1_timing_sync);
 455
 456         sunxi_lcdc_pll_set(mode->pixclock_khz, clk_div, clk_double);
 457 }
 458
 459 #ifdef CONFIG_MACH_SUN6I
 460 static void sunxi_drc_init(void)
 461 {
 462         struct sunxi_ccm_reg * const ccm =
 463                 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 464
 465         /* On sun6i the drc must be clocked even when in pass-through mode */
 466         setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_DRC0);
 467         clock_set_de_mod_clock(&ccm->iep_drc0_clk_cfg, 300000000);
 468 }
 469 #endif
 470
 471 static void sunxi_hdmi_setup_info_frames(const struct ctfb_res_modes *mode)
 472 {
 473         struct sunxi_hdmi_reg * const hdmi =
 474                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 475         u8 checksum = 0;
 476         u8 avi_info_frame[17] = {
 477                 0x82, 0x02, 0x0d, 0x00, 0x12, 0x00, 0x88, 0x00,
 478                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 479                 0x00
 480         };
 481         u8 vendor_info_frame[19] = {
 482                 0x81, 0x01, 0x06, 0x29, 0x03, 0x0c, 0x00, 0x40,
 483                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 484                 0x00, 0x00, 0x00
 485         };
 486         int i;
 487
 488         if (mode->pixclock_khz <= 27000)
 489                 avi_info_frame[5] = 0x40; /* SD-modes, ITU601 colorspace */
 490         else
 491                 avi_info_frame[5] = 0x80; /* HD-modes, ITU709 colorspace */
 492
 493         if (mode->xres * 100 / mode->yres < 156)
 494                 avi_info_frame[5] |= 0x18; /* 4 : 3 */
 495         else
 496                 avi_info_frame[5] |= 0x28; /* 16 : 9 */
 497
 498         for (i = 0; i < ARRAY_SIZE(avi_info_frame); i++)
 499                 checksum += avi_info_frame[i];
 500
 501         avi_info_frame[3] = 0x100 - checksum;
 502
 503         for (i = 0; i < ARRAY_SIZE(avi_info_frame); i++)
 504                 writeb(avi_info_frame[i], &hdmi->avi_info_frame[i]);
 505
 506         writel(SUNXI_HDMI_QCP_PACKET0, &hdmi->qcp_packet0);
 507         writel(SUNXI_HDMI_QCP_PACKET1, &hdmi->qcp_packet1);
 508
 509         for (i = 0; i < ARRAY_SIZE(vendor_info_frame); i++)
 510                 writeb(vendor_info_frame[i], &hdmi->vendor_info_frame[i]);
 511
 512         writel(SUNXI_HDMI_PKT_CTRL0, &hdmi->pkt_ctrl0);
 513         writel(SUNXI_HDMI_PKT_CTRL1, &hdmi->pkt_ctrl1);
 514
 515         setbits_le32(&hdmi->video_ctrl, SUNXI_HDMI_VIDEO_CTRL_HDMI);
 516 }
 517
 518 static void sunxi_hdmi_mode_set(const struct ctfb_res_modes *mode,
 519                                 int clk_div, int clk_double)
 520 {
 521         struct sunxi_hdmi_reg * const hdmi =
 522                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 523         int x, y;
 524
 525         /* Write clear interrupt status bits */
 526         writel(SUNXI_HDMI_IRQ_STATUS_BITS, &hdmi->irq);
 527
 528         if (sunxi_display.monitor == sunxi_monitor_hdmi)
 529                 sunxi_hdmi_setup_info_frames(mode);
 530
 531         /* Set input sync enable */
 532         writel(SUNXI_HDMI_UNKNOWN_INPUT_SYNC, &hdmi->unknown);
 533
 534         /* Init various registers, select pll3 as clock source */
 535         writel(SUNXI_HDMI_VIDEO_POL_TX_CLK, &hdmi->video_polarity);
 536         writel(SUNXI_HDMI_PAD_CTRL0_RUN, &hdmi->pad_ctrl0);
 537         writel(SUNXI_HDMI_PAD_CTRL1, &hdmi->pad_ctrl1);
 538         writel(SUNXI_HDMI_PLL_CTRL, &hdmi->pll_ctrl);
 539         writel(SUNXI_HDMI_PLL_DBG0_PLL3, &hdmi->pll_dbg0);
 540
 541         /* Setup clk div and doubler */
 542         clrsetbits_le32(&hdmi->pll_ctrl, SUNXI_HDMI_PLL_CTRL_DIV_MASK,
 543                         SUNXI_HDMI_PLL_CTRL_DIV(clk_div));
 544         if (!clk_double)
 545                 setbits_le32(&hdmi->pad_ctrl1, SUNXI_HDMI_PAD_CTRL1_HALVE);
 546
 547         /* Setup timing registers */
 548         writel(SUNXI_HDMI_Y(mode->yres) | SUNXI_HDMI_X(mode->xres),
 549                &hdmi->video_size);
 550
 551         x = mode->hsync_len + mode->left_margin;
 552         y = mode->vsync_len + mode->upper_margin;
 553         writel(SUNXI_HDMI_Y(y) | SUNXI_HDMI_X(x), &hdmi->video_bp);
 554
 555         x = mode->right_margin;
 556         y = mode->lower_margin;
 557         writel(SUNXI_HDMI_Y(y) | SUNXI_HDMI_X(x), &hdmi->video_fp);
 558
 559         x = mode->hsync_len;
 560         y = mode->vsync_len;
 561         writel(SUNXI_HDMI_Y(y) | SUNXI_HDMI_X(x), &hdmi->video_spw);
 562
 563         if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
 564                 setbits_le32(&hdmi->video_polarity, SUNXI_HDMI_VIDEO_POL_HOR);
 565
 566         if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
 567                 setbits_le32(&hdmi->video_polarity, SUNXI_HDMI_VIDEO_POL_VER);
 568 }
 569
 570 static void sunxi_hdmi_enable(void)
 571 {
 572         struct sunxi_hdmi_reg * const hdmi =
 573                 (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
 574
 575         udelay(100);
 576         setbits_le32(&hdmi->video_ctrl, SUNXI_HDMI_VIDEO_CTRL_ENABLE);
 577 }
 578
 579 static void sunxi_engines_init(void)
 580 {
 581         sunxi_composer_init();
 582         sunxi_lcdc_init();
 583 #ifdef CONFIG_MACH_SUN6I
 584         sunxi_drc_init();
 585 #endif
 586 }
 587
 588 static void sunxi_mode_set(const struct ctfb_res_modes *mode,
 589                            unsigned int address)
 590 {
 591         switch (sunxi_display.monitor) {
 592         case sunxi_monitor_none:
 593                 break;
 594         case sunxi_monitor_dvi:
 595         case sunxi_monitor_hdmi: {
 596                 int clk_div, clk_double;
 597                 sunxi_composer_mode_set(mode, address);
 598                 sunxi_lcdc_tcon1_mode_set(mode, &clk_div, &clk_double);
 599                 sunxi_hdmi_mode_set(mode, clk_div, clk_double);
 600                 sunxi_composer_enable();
 601                 sunxi_lcdc_enable();
 602                 sunxi_hdmi_enable();
 603                 }
 604                 break;
 605         case sunxi_monitor_lcd:
 606                 /* TODO */
 607                 break;
 608         case sunxi_monitor_vga:
 609                 break;
 610         }
 611 }
 612
 613 static const char *sunxi_get_mon_desc(enum sunxi_monitor monitor)
 614 {
 615         switch (monitor) {
 616         case sunxi_monitor_none:        return "none";
 617         case sunxi_monitor_dvi:         return "dvi";
 618         case sunxi_monitor_hdmi:        return "hdmi";
 619         case sunxi_monitor_lcd:         return "lcd";
 620         case sunxi_monitor_vga:         return "vga";
 621         }
 622         return NULL; /* never reached */
 623 }
 624
 625 void *video_hw_init(void)
 626 {
 627         static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
 628         const struct ctfb_res_modes *mode;
 629         struct ctfb_res_modes edid_mode;
 630         const char *options;
 631         unsigned int depth;
 632         int i, ret, hpd, edid;
 633         char mon[16];
 634
 635         memset(&sunxi_display, 0, sizeof(struct sunxi_display));
 636
 637         printf("Reserved %dkB of RAM for Framebuffer.\n",
 638                CONFIG_SUNXI_FB_SIZE >> 10);
 639         gd->fb_base = gd->ram_top;
 640
 641         video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode, &depth, &options);
 642         hpd = video_get_option_int(options, "hpd", 1);
 643         edid = video_get_option_int(options, "edid", 1);
 644         sunxi_display.monitor = sunxi_monitor_dvi;
 645         video_get_option_string(options, "monitor", mon, sizeof(mon),
 646                                 sunxi_get_mon_desc(sunxi_display.monitor));
 647         for (i = 0; i <= SUNXI_MONITOR_LAST; i++) {
 648                 if (strcmp(mon, sunxi_get_mon_desc(i)) == 0) {
 649                         sunxi_display.monitor = i;
 650                         break;
 651                 }
 652         }
 653         if (i > SUNXI_MONITOR_LAST)
 654                 printf("Unknown monitor: '%s', falling back to '%s'\n",
 655                        mon, sunxi_get_mon_desc(sunxi_display.monitor));
 656
 657         switch (sunxi_display.monitor) {
 658         case sunxi_monitor_none:
 659                 return NULL;
 660         case sunxi_monitor_dvi:
 661         case sunxi_monitor_hdmi:
 662                 /* Always call hdp_detect, as it also enables clocks, etc. */
 663                 ret = sunxi_hdmi_hpd_detect();
 664                 if (ret) {
 665                         printf("HDMI connected: ");
 666                         if (edid && sunxi_hdmi_edid_get_mode(&edid_mode) == 0)
 667                                 mode = &edid_mode;
 668                         break;
 669                 }
 670                 if (!hpd)
 671                         break; /* User has requested to ignore hpd */
 672
 673                 sunxi_hdmi_shutdown();
 674                 return NULL;
 675         case sunxi_monitor_lcd:
 676                 printf("LCD not supported on this board\n");
 677                 return NULL;
 678         case sunxi_monitor_vga:
 679                 printf("VGA not supported on this board\n");
 680                 return NULL;
 681         }
 682
 683         if (mode->vmode != FB_VMODE_NONINTERLACED) {
 684                 printf("Only non-interlaced modes supported, falling back to 1024x768\n");
 685                 mode = &res_mode_init[RES_MODE_1024x768];
 686         } else {
 687                 printf("Setting up a %dx%d %s console\n", mode->xres,
 688                        mode->yres, sunxi_get_mon_desc(sunxi_display.monitor));
 689         }
 690
 691         sunxi_display.enabled = true;
 692         sunxi_engines_init();
 693         sunxi_mode_set(mode, gd->fb_base - CONFIG_SYS_SDRAM_BASE);
 694
 695         /*
 696          * These are the only members of this structure that are used. All the
 697          * others are driver specific. There is nothing to decribe pitch or
 698          * stride, but we are lucky with our hw.
 699          */
 700         graphic_device->frameAdrs = gd->fb_base;
 701         graphic_device->gdfIndex = GDF_32BIT_X888RGB;
 702         graphic_device->gdfBytesPP = 4;
 703         graphic_device->winSizeX = mode->xres;
 704         graphic_device->winSizeY = mode->yres;
 705
 706         return graphic_device;
 707 }
 708
 709 /*
 710  * Simplefb support.
 711  */
 712 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_VIDEO_DT_SIMPLEFB)
 713 int sunxi_simplefb_setup(void *blob)
 714 {
 715         static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
 716         int offset, ret;
 717
 718         if (!sunxi_display.enabled)
 719                 return 0;
 720
 721         /* Find a framebuffer node, with pipeline == "de_be0-lcd0-hdmi" */
 722         offset = fdt_node_offset_by_compatible(blob, -1,
 723                                                "allwinner,simple-framebuffer");
 724         while (offset >= 0) {
 725                 ret = fdt_find_string(blob, offset, "allwinner,pipeline",
 726                                       "de_be0-lcd0-hdmi");
 727                 if (ret == 0)
 728                         break;
 729                 offset = fdt_node_offset_by_compatible(blob, offset,
 730                                                "allwinner,simple-framebuffer");
 731         }
 732         if (offset < 0) {
 733                 eprintf("Cannot setup simplefb: node not found\n");
 734                 return 0; /* Keep older kernels working */
 735         }
 736
 737         ret = fdt_setup_simplefb_node(blob, offset, gd->fb_base,
 738                         graphic_device->winSizeX, graphic_device->winSizeY,
 739                         graphic_device->winSizeX * graphic_device->gdfBytesPP,
 740                         "x8r8g8b8");
 741         if (ret)
 742                 eprintf("Cannot setup simplefb: Error setting properties\n");
 743
 744         return ret;
 745 }
 746 #endif /* CONFIG_OF_BOARD_SETUP && CONFIG_VIDEO_DT_SIMPLEFB */