drivers/video/am335x-fb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2013-2018 Hannes Schmelzer <oe5hpm@oevsv.at>
   4  * B&R Industrial Automation GmbH - http://www.br-automation.com
   5  * Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
   6  *
   7  * minimal framebuffer driver for TI's AM335x SoC to be compatible with
   8  * Wolfgang Denk's LCD-Framework (CONFIG_LCD, common/lcd.c)
   9  *
  10  * - supporting 16/24/32bit RGB/TFT raster Mode (not using palette)
  11  * - sets up LCD controller as in 'am335x_lcdpanel' struct given
  12  * - starts output DMA from gd->fb_base buffer
  13  */
  14 #include <common.h>
  15 #include <dm.h>
  16 #include <lcd.h>
  17 #include <video.h>
  18 #include <asm/arch/clock.h>
  19 #include <asm/arch/hardware.h>
  20 #include <asm/arch/omap.h>
  21 #include <asm/arch/sys_proto.h>
  22 #include <asm/io.h>
  23 #include <asm/utils.h>
  24 #include <linux/err.h>
  25 #include "am335x-fb.h"
  26
  27 #define LCDC_FMAX                               200000000
  28
  29 /* LCD Control Register */
  30 #define LCDC_CTRL_CLK_DIVISOR_MASK              GENMASK(15, 8)
  31 #define LCDC_CTRL_RASTER_MODE                   BIT(0)
  32 #define LCDC_CTRL_CLK_DIVISOR(x)                (((x) & GENMASK(7, 0)) << 8)
  33 /* LCD Clock Enable Register */
  34 #define LCDC_CLKC_ENABLE_CORECLKEN              BIT(0)
  35 #define LCDC_CLKC_ENABLE_LIDDCLKEN              BIT(1)
  36 #define LCDC_CLKC_ENABLE_DMACLKEN               BIT(2)
  37 /* LCD DMA Control Register */
  38 #define LCDC_DMA_CTRL_BURST_SIZE(x)             (((x) & GENMASK(2, 0)) << 4)
  39 #define LCDC_DMA_CTRL_BURST_1                   0x0
  40 #define LCDC_DMA_CTRL_BURST_2                   0x1
  41 #define LCDC_DMA_CTRL_BURST_4                   0x2
  42 #define LCDC_DMA_CTRL_BURST_8                   0x3
  43 #define LCDC_DMA_CTRL_BURST_16                  0x4
  44 #define LCDC_DMA_CTRL_FIFO_TH(x)                (((x) & GENMASK(2, 0)) << 8)
  45 /* LCD Timing_0 Register */
  46 #define LCDC_RASTER_TIMING_0_HORMSB(x)  ((((x) - 1) & BIT(10)) >> 7)
  47 #define LCDC_RASTER_TIMING_0_HORLSB(x) (((((x) >> 4) - 1) & GENMASK(5, 0)) << 4)
  48 #define LCDC_RASTER_TIMING_0_HSWLSB(x)  ((((x) - 1) & GENMASK(5, 0)) << 10)
  49 #define LCDC_RASTER_TIMING_0_HFPLSB(x)  ((((x) - 1) & GENMASK(7, 0)) << 16)
  50 #define LCDC_RASTER_TIMING_0_HBPLSB(x)  ((((x) - 1) & GENMASK(7, 0)) << 24)
  51 /* LCD Timing_1 Register */
  52 #define LCDC_RASTER_TIMING_1_VERLSB(x)          (((x) - 1) & GENMASK(9, 0))
  53 #define LCDC_RASTER_TIMING_1_VSW(x)     ((((x) - 1) & GENMASK(5, 0)) << 10)
  54 #define LCDC_RASTER_TIMING_1_VFP(x)             (((x) & GENMASK(7, 0)) << 16)
  55 #define LCDC_RASTER_TIMING_1_VBP(x)             (((x) & GENMASK(7, 0)) << 24)
  56 /* LCD Timing_2 Register */
  57 #define LCDC_RASTER_TIMING_2_HFPMSB(x)  ((((x) - 1) & GENMASK(9, 8)) >> 8)
  58 #define LCDC_RASTER_TIMING_2_HBPMSB(x)  ((((x) - 1) & GENMASK(9, 8)) >> 4)
  59 #define LCDC_RASTER_TIMING_2_ACB(x)             (((x) & GENMASK(7, 0)) << 8)
  60 #define LCDC_RASTER_TIMING_2_ACBI(x)            (((x) & GENMASK(3, 0)) << 16)
  61 #define LCDC_RASTER_TIMING_2_VSYNC_INVERT       BIT(20)
  62 #define LCDC_RASTER_TIMING_2_HSYNC_INVERT       BIT(21)
  63 #define LCDC_RASTER_TIMING_2_PXCLK_INVERT       BIT(22)
  64 #define LCDC_RASTER_TIMING_2_DE_INVERT          BIT(23)
  65 #define LCDC_RASTER_TIMING_2_HSVS_RISEFALL      BIT(24)
  66 #define LCDC_RASTER_TIMING_2_HSVS_CONTROL       BIT(25)
  67 #define LCDC_RASTER_TIMING_2_VERMSB(x)          ((((x) - 1) & BIT(10)) << 16)
  68 #define LCDC_RASTER_TIMING_2_HSWMSB(x)  ((((x) - 1) & GENMASK(9, 6)) << 21)
  69 /* LCD Raster Ctrl Register */
  70 #define LCDC_RASTER_CTRL_ENABLE                 BIT(0)
  71 #define LCDC_RASTER_CTRL_TFT_MODE               BIT(7)
  72 #define LCDC_RASTER_CTRL_DATA_ORDER             BIT(8)
  73 #define LCDC_RASTER_CTRL_REQDLY(x)              (((x) & GENMASK(7, 0)) << 12)
  74 #define LCDC_RASTER_CTRL_PALMODE_RAWDATA        (0x02 << 20)
  75 #define LCDC_RASTER_CTRL_TFT_ALT_ENABLE         BIT(23)
  76 #define LCDC_RASTER_CTRL_TFT_24BPP_MODE         BIT(25)
  77 #define LCDC_RASTER_CTRL_TFT_24BPP_UNPACK       BIT(26)
  78
  79 struct am335x_lcdhw {
  80         unsigned int            pid;                    /* 0x00 */
  81         unsigned int            ctrl;                   /* 0x04 */
  82         unsigned int            gap0;                   /* 0x08 */
  83         unsigned int            lidd_ctrl;              /* 0x0C */
  84         unsigned int            lidd_cs0_conf;          /* 0x10 */
  85         unsigned int            lidd_cs0_addr;          /* 0x14 */
  86         unsigned int            lidd_cs0_data;          /* 0x18 */
  87         unsigned int            lidd_cs1_conf;          /* 0x1C */
  88         unsigned int            lidd_cs1_addr;          /* 0x20 */
  89         unsigned int            lidd_cs1_data;          /* 0x24 */
  90         unsigned int            raster_ctrl;            /* 0x28 */
  91         unsigned int            raster_timing0;         /* 0x2C */
  92         unsigned int            raster_timing1;         /* 0x30 */
  93         unsigned int            raster_timing2;         /* 0x34 */
  94         unsigned int            raster_subpanel;        /* 0x38 */
  95         unsigned int            raster_subpanel2;       /* 0x3C */
  96         unsigned int            lcddma_ctrl;            /* 0x40 */
  97         unsigned int            lcddma_fb0_base;        /* 0x44 */
  98         unsigned int            lcddma_fb0_ceiling;     /* 0x48 */
  99         unsigned int            lcddma_fb1_base;        /* 0x4C */
 100         unsigned int            lcddma_fb1_ceiling;     /* 0x50 */
 101         unsigned int            sysconfig;              /* 0x54 */
 102         unsigned int            irqstatus_raw;          /* 0x58 */
 103         unsigned int            irqstatus;              /* 0x5C */
 104         unsigned int            irqenable_set;          /* 0x60 */
 105         unsigned int            irqenable_clear;        /* 0x64 */
 106         unsigned int            gap1;                   /* 0x68 */
 107         unsigned int            clkc_enable;            /* 0x6C */
 108         unsigned int            clkc_reset;             /* 0x70 */
 109 };
 110
 111 struct dpll_data {
 112         unsigned long rounded_rate;
 113         u16 rounded_m;
 114         u8 rounded_n;
 115         u8 rounded_div;
 116 };
 117
 118 DECLARE_GLOBAL_DATA_PTR;
 119
 120 /**
 121  * am335x_dpll_round_rate() - Round a target rate for an OMAP DPLL
 122  *
 123  * @dpll_data: struct dpll_data pointer for the DPLL
 124  * @rate:      New DPLL clock rate
 125  * @return rounded rate and the computed m, n and div values in the dpll_data
 126  *         structure, or -ve error code.
 127  */
 128 static ulong am335x_dpll_round_rate(struct dpll_data *dd, ulong rate)
 129 {
 130         unsigned int m, n, d;
 131         unsigned long rounded_rate;
 132         int err, err_r;
 133
 134         dd->rounded_rate = -EFAULT;
 135         err = rate;
 136         err_r = err;
 137
 138         for (d = 2; err && d < 255; d++) {
 139                 for (m = 2; m < 2047; m++) {
 140                         if ((V_OSCK * m) < (rate * d))
 141                                 continue;
 142
 143                         n = (V_OSCK * m) / (rate * d);
 144                         if (n > 127)
 145                                 break;
 146
 147                         if (((V_OSCK * m) / n) > LCDC_FMAX)
 148                                 break;
 149
 150                         rounded_rate = (V_OSCK * m) / n / d;
 151                         err = abs(rounded_rate - rate);
 152                         if (err < err_r) {
 153                                 err_r = err;
 154                                 dd->rounded_rate = rounded_rate;
 155                                 dd->rounded_m = m;
 156                                 dd->rounded_n = n;
 157                                 dd->rounded_div = d;
 158                                 if (err == 0)
 159                                         break;
 160                         }
 161                 }
 162         }
 163
 164         debug("DPLL display: best error %d Hz (M %d, N %d, DIV %d)\n",
 165               err_r, dd->rounded_m, dd->rounded_n, dd->rounded_div);
 166
 167         return dd->rounded_rate;
 168 }
 169
 170 /**
 171  * am335x_fb_set_pixel_clk_rate() - Set pixel clock rate.
 172  *
 173  * @am335x_lcdhw: Base address of the LCD controller registers.
 174  * @rate:         New clock rate in Hz.
 175  * @return new rate, or -ve error code.
 176  */
 177 static ulong am335x_fb_set_pixel_clk_rate(struct am335x_lcdhw *regs, ulong rate)
 178 {
 179         struct dpll_params dpll_disp = { 1, 0, 1, -1, -1, -1, -1 };
 180         struct dpll_data dd;
 181         ulong round_rate;
 182         u32 reg;
 183
 184         round_rate = am335x_dpll_round_rate(&dd, rate);
 185         if (IS_ERR_VALUE(round_rate))
 186                 return round_rate;
 187
 188         dpll_disp.m = dd.rounded_m;
 189         dpll_disp.n = dd.rounded_n;
 190         do_setup_dpll(&dpll_disp_regs, &dpll_disp);
 191
 192         reg = readl(&regs->ctrl) & ~LCDC_CTRL_CLK_DIVISOR_MASK;
 193         reg |= LCDC_CTRL_CLK_DIVISOR(dd.rounded_div);
 194         writel(reg, &regs->ctrl);
 195         return round_rate;
 196 }
 197
 198 #if !CONFIG_IS_ENABLED(DM_VIDEO)
 199
 200 #if !defined(LCD_CNTL_BASE)
 201 #error "hw-base address of LCD-Controller (LCD_CNTL_BASE) not defined!"
 202 #endif
 203
 204 /* Macro definitions */
 205 #define FBSIZE(x)       (((x)->hactive * (x)->vactive * (x)->bpp) >> 3)
 206
 207 #define LCDC_RASTER_TIMING_2_INVMASK(x)         ((x) & GENMASK(25, 20))
 208
 209 static struct am335x_lcdhw *lcdhw = (void *)LCD_CNTL_BASE;
 210
 211 int lcd_get_size(int *line_length)
 212 {
 213         *line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 214         return *line_length * panel_info.vl_row + 0x20;
 215 }
 216
 217 int am335xfb_init(struct am335x_lcdpanel *panel)
 218 {
 219         u32 raster_ctrl = 0;
 220         struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
 221         ulong rate;
 222         u32 reg;
 223
 224         if (gd->fb_base == 0) {
 225                 printf("ERROR: no valid fb_base stored in GLOBAL_DATA_PTR!\n");
 226                 return -1;
 227         }
 228         if (panel == NULL) {
 229                 printf("ERROR: missing ptr to am335x_lcdpanel!\n");
 230                 return -1;
 231         }
 232
 233         /* We can already set the bits for the raster_ctrl in this check */
 234         switch (panel->bpp) {
 235         case 16:
 236                 break;
 237         case 32:
 238                 raster_ctrl |= LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
 239                 /* fallthrough */
 240         case 24:
 241                 raster_ctrl |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
 242                 break;
 243         default:
 244                 pr_err("am335x-fb: invalid bpp value: %d\n", panel->bpp);
 245                 return -1;
 246         }
 247
 248         /* check given clock-frequency */
 249         if (panel->pxl_clk > (LCDC_FMAX / 2)) {
 250                 pr_err("am335x-fb: requested pxl-clk: %d not supported!\n",
 251                        panel->pxl_clk);
 252                 return -1;
 253         }
 254
 255         debug("setting up LCD-Controller for %dx%dx%d (hfp=%d,hbp=%d,hsw=%d / ",
 256               panel->hactive, panel->vactive, panel->bpp,
 257               panel->hfp, panel->hbp, panel->hsw);
 258         debug("vfp=%d,vbp=%d,vsw=%d / clk=%d)\n",
 259               panel->vfp, panel->vfp, panel->vsw, panel->pxl_clk);
 260         debug("using frambuffer at 0x%08x with size %d.\n",
 261               (unsigned int)gd->fb_base, FBSIZE(panel));
 262
 263         rate = am335x_fb_set_pixel_clk_rate(lcdhw, panel->pxl_clk);
 264         if (IS_ERR_VALUE(rate))
 265                 return rate;
 266
 267         /* clock source for LCDC from dispPLL M2 */
 268         writel(0x0, &cmdpll->clklcdcpixelclk);
 269
 270         /* palette default entry */
 271         memset((void *)gd->fb_base, 0, 0x20);
 272         *(unsigned int *)gd->fb_base = 0x4000;
 273         /* point fb behind palette */
 274         gd->fb_base += 0x20;
 275
 276         /* turn ON display through powercontrol function if accessible */
 277         if (panel->panel_power_ctrl != NULL)
 278                 panel->panel_power_ctrl(1);
 279
 280         debug("am335x-fb: wait for stable power ...\n");
 281         mdelay(panel->pup_delay);
 282         lcdhw->clkc_enable = LCDC_CLKC_ENABLE_CORECLKEN |
 283                 LCDC_CLKC_ENABLE_LIDDCLKEN | LCDC_CLKC_ENABLE_DMACLKEN;
 284         lcdhw->raster_ctrl = 0;
 285
 286         reg = lcdhw->ctrl & LCDC_CTRL_CLK_DIVISOR_MASK;
 287         reg |= LCDC_CTRL_RASTER_MODE;
 288         lcdhw->ctrl = reg;
 289
 290         lcdhw->lcddma_fb0_base = gd->fb_base;
 291         lcdhw->lcddma_fb0_ceiling = gd->fb_base + FBSIZE(panel);
 292         lcdhw->lcddma_fb1_base = gd->fb_base;
 293         lcdhw->lcddma_fb1_ceiling = gd->fb_base + FBSIZE(panel);
 294         lcdhw->lcddma_ctrl = LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
 295
 296         lcdhw->raster_timing0 = LCDC_RASTER_TIMING_0_HORLSB(panel->hactive) |
 297                                 LCDC_RASTER_TIMING_0_HORMSB(panel->hactive) |
 298                                 LCDC_RASTER_TIMING_0_HFPLSB(panel->hfp) |
 299                                 LCDC_RASTER_TIMING_0_HBPLSB(panel->hbp) |
 300                                 LCDC_RASTER_TIMING_0_HSWLSB(panel->hsw);
 301         lcdhw->raster_timing1 = LCDC_RASTER_TIMING_1_VBP(panel->vbp) |
 302                                 LCDC_RASTER_TIMING_1_VFP(panel->vfp) |
 303                                 LCDC_RASTER_TIMING_1_VSW(panel->vsw) |
 304                                 LCDC_RASTER_TIMING_1_VERLSB(panel->vactive);
 305         lcdhw->raster_timing2 = LCDC_RASTER_TIMING_2_HSWMSB(panel->hsw) |
 306                                 LCDC_RASTER_TIMING_2_VERMSB(panel->vactive) |
 307                                 LCDC_RASTER_TIMING_2_INVMASK(panel->pol) |
 308                                 LCDC_RASTER_TIMING_2_HBPMSB(panel->hbp) |
 309                                 LCDC_RASTER_TIMING_2_HFPMSB(panel->hfp) |
 310                                 0x0000FF00;     /* clk cycles for ac-bias */
 311         lcdhw->raster_ctrl =    raster_ctrl |
 312                                 LCDC_RASTER_CTRL_PALMODE_RAWDATA |
 313                                 LCDC_RASTER_CTRL_TFT_MODE |
 314                                 LCDC_RASTER_CTRL_ENABLE;
 315
 316         debug("am335x-fb: waiting picture to be stable.\n.");
 317         mdelay(panel->pon_delay);
 318
 319         return 0;
 320 }
 321
 322 #else /* CONFIG_DM_VIDEO */
 323
 324 #define FBSIZE(t, p)    (((t)->hactive.typ * (t)->vactive.typ * (p)->bpp) >> 3)
 325
 326 enum {
 327         LCD_MAX_WIDTH           = 2048,
 328         LCD_MAX_HEIGHT          = 2048,
 329         LCD_MAX_LOG2_BPP        = VIDEO_BPP32,
 330 };
 331
 332 /**
 333  * tilcdc_panel_info: Panel parameters
 334  *
 335  * @ac_bias: AC Bias Pin Frequency
 336  * @ac_bias_intrpt: AC Bias Pin Transitions per Interrupt
 337  * @dma_burst_sz: DMA burst size
 338  * @bpp: Bits per pixel
 339  * @fdd: FIFO DMA Request Delay
 340  * @tft_alt_mode: TFT Alternative Signal Mapping (Only for active)
 341  * @invert_pxl_clk: Invert pixel clock
 342  * @sync_edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
 343  * @sync_ctrl: Horizontal and Vertical Sync: Control: 0=ignore
 344  * @raster_order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
 345  * @fifo_th: DMA FIFO threshold
 346  */
 347 struct tilcdc_panel_info {
 348         u32 ac_bias;
 349         u32 ac_bias_intrpt;
 350         u32 dma_burst_sz;
 351         u32 bpp;
 352         u32 fdd;
 353         bool tft_alt_mode;
 354         bool invert_pxl_clk;
 355         u32 sync_edge;
 356         u32 sync_ctrl;
 357         u32 raster_order;
 358         u32 fifo_th;
 359 };
 360
 361 struct am335x_fb_priv {
 362         struct am335x_lcdhw *regs;
 363         struct tilcdc_panel_info panel;
 364         struct display_timing timing;
 365 };
 366
 367 static int am335x_fb_remove(struct udevice *dev)
 368 {
 369         struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
 370
 371         uc_plat->base -= 0x20;
 372         uc_plat->size += 0x20;
 373         return 0;
 374 }
 375
 376 static int am335x_fb_probe(struct udevice *dev)
 377 {
 378         struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
 379         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 380         struct am335x_fb_priv *priv = dev_get_priv(dev);
 381         struct am335x_lcdhw *regs = priv->regs;
 382         struct tilcdc_panel_info *panel = &priv->panel;
 383         struct display_timing *timing = &priv->timing;
 384         struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
 385         u32 reg;
 386
 387         /* Before relocation we don't need to do anything */
 388         if (!(gd->flags & GD_FLG_RELOC))
 389                 return 0;
 390
 391         am335x_fb_set_pixel_clk_rate(regs, timing->pixelclock.typ);
 392
 393         /* clock source for LCDC from dispPLL M2 */
 394         writel(0, &cmdpll->clklcdcpixelclk);
 395
 396         /* palette default entry */
 397         memset((void *)uc_plat->base, 0, 0x20);
 398         *(unsigned int *)uc_plat->base = 0x4000;
 399         /* point fb behind palette */
 400         uc_plat->base += 0x20;
 401         uc_plat->size -= 0x20;
 402
 403         writel(LCDC_CLKC_ENABLE_CORECLKEN | LCDC_CLKC_ENABLE_LIDDCLKEN |
 404                LCDC_CLKC_ENABLE_DMACLKEN, &regs->clkc_enable);
 405         writel(0, &regs->raster_ctrl);
 406
 407         reg = readl(&regs->ctrl) & LCDC_CTRL_CLK_DIVISOR_MASK;
 408         reg |= LCDC_CTRL_RASTER_MODE;
 409         writel(reg, &regs->ctrl);
 410
 411         writel(uc_plat->base, &regs->lcddma_fb0_base);
 412         writel(uc_plat->base + FBSIZE(timing, panel),
 413                &regs->lcddma_fb0_ceiling);
 414         writel(uc_plat->base, &regs->lcddma_fb1_base);
 415         writel(uc_plat->base + FBSIZE(timing, panel),
 416                &regs->lcddma_fb1_ceiling);
 417
 418         reg = LCDC_DMA_CTRL_FIFO_TH(panel->fifo_th);
 419         switch (panel->dma_burst_sz) {
 420         case 1:
 421                 reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_1);
 422                 break;
 423         case 2:
 424                 reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_2);
 425                 break;
 426         case 4:
 427                 reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_4);
 428                 break;
 429         case 8:
 430                 reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_8);
 431                 break;
 432         case 16:
 433                 reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
 434                 break;
 435         }
 436
 437         writel(reg, &regs->lcddma_ctrl);
 438
 439         writel(LCDC_RASTER_TIMING_0_HORLSB(timing->hactive.typ) |
 440                LCDC_RASTER_TIMING_0_HORMSB(timing->hactive.typ) |
 441                LCDC_RASTER_TIMING_0_HFPLSB(timing->hfront_porch.typ) |
 442                LCDC_RASTER_TIMING_0_HBPLSB(timing->hback_porch.typ) |
 443                LCDC_RASTER_TIMING_0_HSWLSB(timing->hsync_len.typ),
 444                &regs->raster_timing0);
 445
 446         writel(LCDC_RASTER_TIMING_1_VBP(timing->vback_porch.typ) |
 447                LCDC_RASTER_TIMING_1_VFP(timing->vfront_porch.typ) |
 448                LCDC_RASTER_TIMING_1_VSW(timing->vsync_len.typ) |
 449                LCDC_RASTER_TIMING_1_VERLSB(timing->vactive.typ),
 450                &regs->raster_timing1);
 451
 452         reg = LCDC_RASTER_TIMING_2_ACB(panel->ac_bias) |
 453                 LCDC_RASTER_TIMING_2_ACBI(panel->ac_bias_intrpt) |
 454                 LCDC_RASTER_TIMING_2_HSWMSB(timing->hsync_len.typ) |
 455                 LCDC_RASTER_TIMING_2_VERMSB(timing->vactive.typ) |
 456                 LCDC_RASTER_TIMING_2_HBPMSB(timing->hback_porch.typ) |
 457                 LCDC_RASTER_TIMING_2_HFPMSB(timing->hfront_porch.typ);
 458
 459         if (timing->flags & DISPLAY_FLAGS_VSYNC_LOW)
 460                 reg |= LCDC_RASTER_TIMING_2_VSYNC_INVERT;
 461
 462         if (timing->flags & DISPLAY_FLAGS_HSYNC_LOW)
 463                 reg |= LCDC_RASTER_TIMING_2_HSYNC_INVERT;
 464
 465         if (panel->invert_pxl_clk)
 466                 reg |= LCDC_RASTER_TIMING_2_PXCLK_INVERT;
 467
 468         if (panel->sync_edge)
 469                 reg |= LCDC_RASTER_TIMING_2_HSVS_RISEFALL;
 470
 471         if (panel->sync_ctrl)
 472                 reg |= LCDC_RASTER_TIMING_2_HSVS_CONTROL;
 473
 474         writel(reg, &regs->raster_timing2);
 475
 476         reg = LCDC_RASTER_CTRL_PALMODE_RAWDATA | LCDC_RASTER_CTRL_TFT_MODE |
 477                 LCDC_RASTER_CTRL_ENABLE | LCDC_RASTER_CTRL_REQDLY(panel->fdd);
 478
 479         if (panel->tft_alt_mode)
 480                 reg |= LCDC_RASTER_CTRL_TFT_ALT_ENABLE;
 481
 482         if (panel->bpp == 24)
 483                 reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
 484         else if (panel->bpp == 32)
 485                 reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE |
 486                         LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
 487
 488         if (panel->raster_order)
 489                 reg |= LCDC_RASTER_CTRL_DATA_ORDER;
 490
 491         writel(reg, &regs->raster_ctrl);
 492
 493         uc_priv->xsize = timing->hactive.typ;
 494         uc_priv->ysize = timing->vactive.typ;
 495         uc_priv->bpix = log_2_n_round_up(panel->bpp);
 496         return 0;
 497 }
 498
 499 static int am335x_fb_ofdata_to_platdata(struct udevice *dev)
 500 {
 501         struct am335x_fb_priv *priv = dev_get_priv(dev);
 502         struct tilcdc_panel_info *panel = &priv->panel;
 503         struct display_timing *timing = &priv->timing;
 504         ofnode node;
 505         int err;
 506
 507         node = ofnode_by_compatible(ofnode_null(), "ti,am33xx-tilcdc");
 508         if (!ofnode_valid(node)) {
 509                 dev_err(dev, "missing 'ti,am33xx-tilcdc' node\n");
 510                 return -ENXIO;
 511         }
 512
 513         priv->regs = (struct am335x_lcdhw *)ofnode_get_addr(node);
 514         dev_dbg(dev, "LCD: base address=0x%x\n", (unsigned int)priv->regs);
 515
 516         err = ofnode_decode_display_timing(dev_ofnode(dev), 0, timing);
 517         if (err) {
 518                 dev_err(dev, "failed to get display timing\n");
 519                 return err;
 520         }
 521
 522         if (timing->pixelclock.typ > (LCDC_FMAX / 2)) {
 523                 dev_err(dev, "invalid display clock-frequency: %d Hz\n",
 524                         timing->pixelclock.typ);
 525                 return -EINVAL;
 526         }
 527
 528         if (timing->hactive.typ > LCD_MAX_WIDTH)
 529                 timing->hactive.typ = LCD_MAX_WIDTH;
 530
 531         if (timing->vactive.typ > LCD_MAX_HEIGHT)
 532                 timing->vactive.typ = LCD_MAX_HEIGHT;
 533
 534         node = ofnode_find_subnode(dev_ofnode(dev), "panel-info");
 535         if (!ofnode_valid(node)) {
 536                 dev_err(dev, "missing 'panel-info' node\n");
 537                 return -ENXIO;
 538         }
 539
 540         err |= ofnode_read_u32(node, "ac-bias", &panel->ac_bias);
 541         err |= ofnode_read_u32(node, "ac-bias-intrpt", &panel->ac_bias_intrpt);
 542         err |= ofnode_read_u32(node, "dma-burst-sz", &panel->dma_burst_sz);
 543         err |= ofnode_read_u32(node, "bpp", &panel->bpp);
 544         err |= ofnode_read_u32(node, "fdd", &panel->fdd);
 545         err |= ofnode_read_u32(node, "sync-edge", &panel->sync_edge);
 546         err |= ofnode_read_u32(node, "sync-ctrl", &panel->sync_ctrl);
 547         err |= ofnode_read_u32(node, "raster-order", &panel->raster_order);
 548         err |= ofnode_read_u32(node, "fifo-th", &panel->fifo_th);
 549         if (err) {
 550                 dev_err(dev, "failed to get panel info\n");
 551                 return err;
 552         }
 553
 554         switch (panel->bpp) {
 555         case 16:
 556         case 24:
 557         case 32:
 558                 break;
 559         default:
 560                 dev_err(dev, "invalid seting, bpp: %d\n", panel->bpp);
 561                 return -EINVAL;
 562         }
 563
 564         switch (panel->dma_burst_sz) {
 565         case 1:
 566         case 2:
 567         case 4:
 568         case 8:
 569         case 16:
 570                 break;
 571         default:
 572                 dev_err(dev, "invalid setting, dma-burst-sz: %d\n",
 573                         panel->dma_burst_sz);
 574                 return -EINVAL;
 575         }
 576
 577         /* optional */
 578         panel->tft_alt_mode = ofnode_read_bool(node, "tft-alt-mode");
 579         panel->invert_pxl_clk = ofnode_read_bool(node, "invert-pxl-clk");
 580
 581         dev_dbg(dev, "LCD: %dx%d, bpp=%d, clk=%d Hz\n", timing->hactive.typ,
 582                 timing->vactive.typ, panel->bpp, timing->pixelclock.typ);
 583         dev_dbg(dev, "     hbp=%d, hfp=%d, hsw=%d\n", timing->hback_porch.typ,
 584                 timing->hfront_porch.typ, timing->hsync_len.typ);
 585         dev_dbg(dev, "     vbp=%d, vfp=%d, vsw=%d\n", timing->vback_porch.typ,
 586                 timing->vfront_porch.typ, timing->vsync_len.typ);
 587
 588         return 0;
 589 }
 590
 591 static int am335x_fb_bind(struct udevice *dev)
 592 {
 593         struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
 594
 595         uc_plat->size = ((LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
 596                           (1 << LCD_MAX_LOG2_BPP)) >> 3) + 0x20;
 597
 598         dev_dbg(dev, "frame buffer size 0x%x\n", uc_plat->size);
 599         return 0;
 600 }
 601
 602 static const struct udevice_id am335x_fb_ids[] = {
 603         { .compatible = "ti,tilcdc,panel" },
 604         { }
 605 };
 606
 607 U_BOOT_DRIVER(am335x_fb) = {
 608         .name = "am335x_fb",
 609         .id = UCLASS_VIDEO,
 610         .of_match = am335x_fb_ids,
 611         .bind = am335x_fb_bind,
 612         .ofdata_to_platdata = am335x_fb_ofdata_to_platdata,
 613         .probe = am335x_fb_probe,
 614         .remove = am335x_fb_remove,
 615         .priv_auto_alloc_size = sizeof(struct am335x_fb_priv),
 616 };
 617
 618 #endif /* CONFIG_DM_VIDEO */