drivers/gpu/drm/panel/panel-sitronix-st7701.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2019, Amarula Solutions.
   4  * Author: Jagan Teki <jagan@amarulasolutions.com>
   5  */
   6
   7 #include <drm/drm_mipi_dsi.h>
   8 #include <drm/drm_modes.h>
   9 #include <drm/drm_panel.h>
  10
  11 #include <linux/bitfield.h>
  12 #include <linux/gpio/consumer.h>
  13 #include <linux/delay.h>
  14 #include <linux/module.h>
  15 #include <linux/of_device.h>
  16 #include <linux/regulator/consumer.h>
  17
  18 #include <video/mipi_display.h>
  19
  20 /* Command2 BKx selection command */
  21 #define DSI_CMD2BKX_SEL                 0xFF
  22 #define DSI_CMD1                        0
  23 #define DSI_CMD2                        BIT(4)
  24 #define DSI_CMD2BK_MASK                 GENMASK(3, 0)
  25
  26 /* Command2, BK0 commands */
  27 #define DSI_CMD2_BK0_PVGAMCTRL          0xB0 /* Positive Voltage Gamma Control */
  28 #define DSI_CMD2_BK0_NVGAMCTRL          0xB1 /* Negative Voltage Gamma Control */
  29 #define DSI_CMD2_BK0_LNESET             0xC0 /* Display Line setting */
  30 #define DSI_CMD2_BK0_PORCTRL            0xC1 /* Porch control */
  31 #define DSI_CMD2_BK0_INVSEL             0xC2 /* Inversion selection, Frame Rate Control */
  32
  33 /* Command2, BK1 commands */
  34 #define DSI_CMD2_BK1_VRHS               0xB0 /* Vop amplitude setting */
  35 #define DSI_CMD2_BK1_VCOM               0xB1 /* VCOM amplitude setting */
  36 #define DSI_CMD2_BK1_VGHSS              0xB2 /* VGH Voltage setting */
  37 #define DSI_CMD2_BK1_TESTCMD            0xB3 /* TEST Command Setting */
  38 #define DSI_CMD2_BK1_VGLS               0xB5 /* VGL Voltage setting */
  39 #define DSI_CMD2_BK1_PWCTLR1            0xB7 /* Power Control 1 */
  40 #define DSI_CMD2_BK1_PWCTLR2            0xB8 /* Power Control 2 */
  41 #define DSI_CMD2_BK1_SPD1               0xC1 /* Source pre_drive timing set1 */
  42 #define DSI_CMD2_BK1_SPD2               0xC2 /* Source EQ2 Setting */
  43 #define DSI_CMD2_BK1_MIPISET1           0xD0 /* MIPI Setting 1 */
  44
  45 /* Command2, BK0 bytes */
  46 #define DSI_CMD2_BK0_GAMCTRL_AJ_MASK    GENMASK(7, 6)
  47 #define DSI_CMD2_BK0_GAMCTRL_VC0_MASK   GENMASK(3, 0)
  48 #define DSI_CMD2_BK0_GAMCTRL_VC4_MASK   GENMASK(5, 0)
  49 #define DSI_CMD2_BK0_GAMCTRL_VC8_MASK   GENMASK(5, 0)
  50 #define DSI_CMD2_BK0_GAMCTRL_VC16_MASK  GENMASK(4, 0)
  51 #define DSI_CMD2_BK0_GAMCTRL_VC24_MASK  GENMASK(4, 0)
  52 #define DSI_CMD2_BK0_GAMCTRL_VC52_MASK  GENMASK(3, 0)
  53 #define DSI_CMD2_BK0_GAMCTRL_VC80_MASK  GENMASK(5, 0)
  54 #define DSI_CMD2_BK0_GAMCTRL_VC108_MASK GENMASK(3, 0)
  55 #define DSI_CMD2_BK0_GAMCTRL_VC147_MASK GENMASK(3, 0)
  56 #define DSI_CMD2_BK0_GAMCTRL_VC175_MASK GENMASK(5, 0)
  57 #define DSI_CMD2_BK0_GAMCTRL_VC203_MASK GENMASK(3, 0)
  58 #define DSI_CMD2_BK0_GAMCTRL_VC231_MASK GENMASK(4, 0)
  59 #define DSI_CMD2_BK0_GAMCTRL_VC239_MASK GENMASK(4, 0)
  60 #define DSI_CMD2_BK0_GAMCTRL_VC247_MASK GENMASK(5, 0)
  61 #define DSI_CMD2_BK0_GAMCTRL_VC251_MASK GENMASK(5, 0)
  62 #define DSI_CMD2_BK0_GAMCTRL_VC255_MASK GENMASK(4, 0)
  63 #define DSI_CMD2_BK0_LNESET_LINE_MASK   GENMASK(6, 0)
  64 #define DSI_CMD2_BK0_LNESET_LDE_EN      BIT(7)
  65 #define DSI_CMD2_BK0_LNESET_LINEDELTA   GENMASK(1, 0)
  66 #define DSI_CMD2_BK0_PORCTRL_VBP_MASK   GENMASK(7, 0)
  67 #define DSI_CMD2_BK0_PORCTRL_VFP_MASK   GENMASK(7, 0)
  68 #define DSI_CMD2_BK0_INVSEL_ONES_MASK   GENMASK(5, 4)
  69 #define DSI_CMD2_BK0_INVSEL_NLINV_MASK  GENMASK(2, 0)
  70 #define DSI_CMD2_BK0_INVSEL_RTNI_MASK   GENMASK(4, 0)
  71
  72 /* Command2, BK1 bytes */
  73 #define DSI_CMD2_BK1_VRHA_MASK          GENMASK(7, 0)
  74 #define DSI_CMD2_BK1_VCOM_MASK          GENMASK(7, 0)
  75 #define DSI_CMD2_BK1_VGHSS_MASK         GENMASK(3, 0)
  76 #define DSI_CMD2_BK1_TESTCMD_VAL        BIT(7)
  77 #define DSI_CMD2_BK1_VGLS_ONES          BIT(6)
  78 #define DSI_CMD2_BK1_VGLS_MASK          GENMASK(3, 0)
  79 #define DSI_CMD2_BK1_PWRCTRL1_AP_MASK   GENMASK(7, 6)
  80 #define DSI_CMD2_BK1_PWRCTRL1_APIS_MASK GENMASK(3, 2)
  81 #define DSI_CMD2_BK1_PWRCTRL1_APOS_MASK GENMASK(1, 0)
  82 #define DSI_CMD2_BK1_PWRCTRL2_AVDD_MASK GENMASK(5, 4)
  83 #define DSI_CMD2_BK1_PWRCTRL2_AVCL_MASK GENMASK(1, 0)
  84 #define DSI_CMD2_BK1_SPD1_ONES_MASK     GENMASK(6, 4)
  85 #define DSI_CMD2_BK1_SPD1_T2D_MASK      GENMASK(3, 0)
  86 #define DSI_CMD2_BK1_SPD2_ONES_MASK     GENMASK(6, 4)
  87 #define DSI_CMD2_BK1_SPD2_T3D_MASK      GENMASK(3, 0)
  88 #define DSI_CMD2_BK1_MIPISET1_ONES      BIT(7)
  89 #define DSI_CMD2_BK1_MIPISET1_EOT_EN    BIT(3)
  90
  91 #define CFIELD_PREP(_mask, _val)                                        \
  92         (((typeof(_mask))(_val) << (__builtin_ffsll(_mask) - 1)) & (_mask))
  93
  94 enum op_bias {
  95         OP_BIAS_OFF = 0,
  96         OP_BIAS_MIN,
  97         OP_BIAS_MIDDLE,
  98         OP_BIAS_MAX
  99 };
 100
 101 struct st7701;
 102
 103 struct st7701_panel_desc {
 104         const struct drm_display_mode *mode;
 105         unsigned int lanes;
 106         enum mipi_dsi_pixel_format format;
 107         unsigned int panel_sleep_delay;
 108
 109         /* TFT matrix driver configuration, panel specific. */
 110         const u8        pv_gamma[16];   /* Positive voltage gamma control */
 111         const u8        nv_gamma[16];   /* Negative voltage gamma control */
 112         const u8        nlinv;          /* Inversion selection */
 113         const u32       vop_uv;         /* Vop in uV */
 114         const u32       vcom_uv;        /* Vcom in uV */
 115         const u16       vgh_mv;         /* Vgh in mV */
 116         const s16       vgl_mv;         /* Vgl in mV */
 117         const u16       avdd_mv;        /* Avdd in mV */
 118         const s16       avcl_mv;        /* Avcl in mV */
 119         const enum op_bias      gamma_op_bias;
 120         const enum op_bias      input_op_bias;
 121         const enum op_bias      output_op_bias;
 122         const u16       t2d_ns;         /* T2D in ns */
 123         const u16       t3d_ns;         /* T3D in ns */
 124         const bool      eot_en;
 125
 126         /* GIP sequence, fully custom and undocumented. */
 127         void            (*gip_sequence)(struct st7701 *st7701);
 128 };
 129
 130 struct st7701 {
 131         struct drm_panel panel;
 132         struct mipi_dsi_device *dsi;
 133         const struct st7701_panel_desc *desc;
 134
 135         struct regulator_bulk_data supplies[2];
 136         struct gpio_desc *reset;
 137         unsigned int sleep_delay;
 138         enum drm_panel_orientation orientation;
 139 };
 140
 141 static inline struct st7701 *panel_to_st7701(struct drm_panel *panel)
 142 {
 143         return container_of(panel, struct st7701, panel);
 144 }
 145
 146 static inline int st7701_dsi_write(struct st7701 *st7701, const void *seq,
 147                                    size_t len)
 148 {
 149         return mipi_dsi_dcs_write_buffer(st7701->dsi, seq, len);
 150 }
 151
 152 #define ST7701_DSI(st7701, seq...)                              \
 153         {                                                       \
 154                 const u8 d[] = { seq };                         \
 155                 st7701_dsi_write(st7701, d, ARRAY_SIZE(d));     \
 156         }
 157
 158 static u8 st7701_vgls_map(struct st7701 *st7701)
 159 {
 160         const struct st7701_panel_desc *desc = st7701->desc;
 161         struct {
 162                 s32     vgl;
 163                 u8      val;
 164         } map[16] = {
 165                 { -7060, 0x0 }, { -7470, 0x1 },
 166                 { -7910, 0x2 }, { -8140, 0x3 },
 167                 { -8650, 0x4 }, { -8920, 0x5 },
 168                 { -9210, 0x6 }, { -9510, 0x7 },
 169                 { -9830, 0x8 }, { -10170, 0x9 },
 170                 { -10530, 0xa }, { -10910, 0xb },
 171                 { -11310, 0xc }, { -11730, 0xd },
 172                 { -12200, 0xe }, { -12690, 0xf }
 173         };
 174         int i;
 175
 176         for (i = 0; i < ARRAY_SIZE(map); i++)
 177                 if (desc->vgl_mv == map[i].vgl)
 178                         return map[i].val;
 179
 180         return 0;
 181 }
 182
 183 static void st7701_switch_cmd_bkx(struct st7701 *st7701, bool cmd2, u8 bkx)
 184 {
 185         u8 val;
 186
 187         if (cmd2)
 188                 val = DSI_CMD2 | FIELD_PREP(DSI_CMD2BK_MASK, bkx);
 189         else
 190                 val = DSI_CMD1;
 191
 192         ST7701_DSI(st7701, DSI_CMD2BKX_SEL, 0x77, 0x01, 0x00, 0x00, val);
 193 }
 194
 195 static void st7701_init_sequence(struct st7701 *st7701)
 196 {
 197         const struct st7701_panel_desc *desc = st7701->desc;
 198         const struct drm_display_mode *mode = desc->mode;
 199         const u8 linecount8 = mode->vdisplay / 8;
 200         const u8 linecountrem2 = (mode->vdisplay % 8) / 2;
 201
 202         ST7701_DSI(st7701, MIPI_DCS_SOFT_RESET, 0x00);
 203
 204         /* We need to wait 5ms before sending new commands */
 205         msleep(5);
 206
 207         ST7701_DSI(st7701, MIPI_DCS_EXIT_SLEEP_MODE, 0x00);
 208
 209         msleep(st7701->sleep_delay);
 210
 211         /* Command2, BK0 */
 212         st7701_switch_cmd_bkx(st7701, true, 0);
 213
 214         mipi_dsi_dcs_write(st7701->dsi, DSI_CMD2_BK0_PVGAMCTRL,
 215                            desc->pv_gamma, ARRAY_SIZE(desc->pv_gamma));
 216         mipi_dsi_dcs_write(st7701->dsi, DSI_CMD2_BK0_NVGAMCTRL,
 217                            desc->nv_gamma, ARRAY_SIZE(desc->nv_gamma));
 218         /*
 219          * Vertical line count configuration:
 220          * Line[6:0]: select number of vertical lines of the TFT matrix in
 221          *            multiples of 8 lines
 222          * LDE_EN: enable sub-8-line granularity line count
 223          * Line_delta[1:0]: add 0/2/4/6 extra lines to line count selected
 224          *                  using Line[6:0]
 225          *
 226          * Total number of vertical lines:
 227          * LN = ((Line[6:0] + 1) * 8) + (LDE_EN ? Line_delta[1:0] * 2 : 0)
 228          */
 229         ST7701_DSI(st7701, DSI_CMD2_BK0_LNESET,
 230                    FIELD_PREP(DSI_CMD2_BK0_LNESET_LINE_MASK, linecount8 - 1) |
 231                    (linecountrem2 ? DSI_CMD2_BK0_LNESET_LDE_EN : 0),
 232                    FIELD_PREP(DSI_CMD2_BK0_LNESET_LINEDELTA, linecountrem2));
 233         ST7701_DSI(st7701, DSI_CMD2_BK0_PORCTRL,
 234                    FIELD_PREP(DSI_CMD2_BK0_PORCTRL_VBP_MASK,
 235                               mode->vtotal - mode->vsync_end),
 236                    FIELD_PREP(DSI_CMD2_BK0_PORCTRL_VFP_MASK,
 237                               mode->vsync_start - mode->vdisplay));
 238         /*
 239          * Horizontal pixel count configuration:
 240          * PCLK = 512 + (RTNI[4:0] * 16)
 241          * The PCLK is number of pixel clock per line, which matches
 242          * mode htotal. The minimum is 512 PCLK.
 243          */
 244         ST7701_DSI(st7701, DSI_CMD2_BK0_INVSEL,
 245                    DSI_CMD2_BK0_INVSEL_ONES_MASK |
 246                    FIELD_PREP(DSI_CMD2_BK0_INVSEL_NLINV_MASK, desc->nlinv),
 247                    FIELD_PREP(DSI_CMD2_BK0_INVSEL_RTNI_MASK,
 248                               (clamp((u32)mode->htotal, 512U, 1008U) - 512) / 16));
 249
 250         /* Command2, BK1 */
 251         st7701_switch_cmd_bkx(st7701, true, 1);
 252
 253         /* Vop = 3.5375V + (VRHA[7:0] * 0.0125V) */
 254         ST7701_DSI(st7701, DSI_CMD2_BK1_VRHS,
 255                    FIELD_PREP(DSI_CMD2_BK1_VRHA_MASK,
 256                               DIV_ROUND_CLOSEST(desc->vop_uv - 3537500, 12500)));
 257
 258         /* Vcom = 0.1V + (VCOM[7:0] * 0.0125V) */
 259         ST7701_DSI(st7701, DSI_CMD2_BK1_VCOM,
 260                    FIELD_PREP(DSI_CMD2_BK1_VCOM_MASK,
 261                               DIV_ROUND_CLOSEST(desc->vcom_uv - 100000, 12500)));
 262
 263         /* Vgh = 11.5V + (VGHSS[7:0] * 0.5V) */
 264         ST7701_DSI(st7701, DSI_CMD2_BK1_VGHSS,
 265                    FIELD_PREP(DSI_CMD2_BK1_VGHSS_MASK,
 266                               DIV_ROUND_CLOSEST(clamp(desc->vgh_mv,
 267                                                       (u16)11500,
 268                                                       (u16)17000) - 11500,
 269                                                 500)));
 270
 271         ST7701_DSI(st7701, DSI_CMD2_BK1_TESTCMD, DSI_CMD2_BK1_TESTCMD_VAL);
 272
 273         /* Vgl is non-linear */
 274         ST7701_DSI(st7701, DSI_CMD2_BK1_VGLS,
 275                    DSI_CMD2_BK1_VGLS_ONES |
 276                    FIELD_PREP(DSI_CMD2_BK1_VGLS_MASK, st7701_vgls_map(st7701)));
 277
 278         ST7701_DSI(st7701, DSI_CMD2_BK1_PWCTLR1,
 279                    FIELD_PREP(DSI_CMD2_BK1_PWRCTRL1_AP_MASK,
 280                               desc->gamma_op_bias) |
 281                    FIELD_PREP(DSI_CMD2_BK1_PWRCTRL1_APIS_MASK,
 282                               desc->input_op_bias) |
 283                    FIELD_PREP(DSI_CMD2_BK1_PWRCTRL1_APOS_MASK,
 284                               desc->output_op_bias));
 285
 286         /* Avdd = 6.2V + (AVDD[1:0] * 0.2V) , Avcl = -4.4V - (AVCL[1:0] * 0.2V) */
 287         ST7701_DSI(st7701, DSI_CMD2_BK1_PWCTLR2,
 288                    FIELD_PREP(DSI_CMD2_BK1_PWRCTRL2_AVDD_MASK,
 289                               DIV_ROUND_CLOSEST(desc->avdd_mv - 6200, 200)) |
 290                    FIELD_PREP(DSI_CMD2_BK1_PWRCTRL2_AVCL_MASK,
 291                               DIV_ROUND_CLOSEST(-4400 + desc->avcl_mv, 200)));
 292
 293         /* T2D = 0.2us * T2D[3:0] */
 294         ST7701_DSI(st7701, DSI_CMD2_BK1_SPD1,
 295                    DSI_CMD2_BK1_SPD1_ONES_MASK |
 296                    FIELD_PREP(DSI_CMD2_BK1_SPD1_T2D_MASK,
 297                               DIV_ROUND_CLOSEST(desc->t2d_ns, 200)));
 298
 299         /* T3D = 4us + (0.8us * T3D[3:0]) */
 300         ST7701_DSI(st7701, DSI_CMD2_BK1_SPD2,
 301                    DSI_CMD2_BK1_SPD2_ONES_MASK |
 302                    FIELD_PREP(DSI_CMD2_BK1_SPD2_T3D_MASK,
 303                               DIV_ROUND_CLOSEST(desc->t3d_ns - 4000, 800)));
 304
 305         ST7701_DSI(st7701, DSI_CMD2_BK1_MIPISET1,
 306                    DSI_CMD2_BK1_MIPISET1_ONES |
 307                    (desc->eot_en ? DSI_CMD2_BK1_MIPISET1_EOT_EN : 0));
 308 }
 309
 310 static void ts8550b_gip_sequence(struct st7701 *st7701)
 311 {
 312         /**
 313          * ST7701_SPEC_V1.2 is unable to provide enough information above this
 314          * specific command sequence, so grab the same from vendor BSP driver.
 315          */
 316         ST7701_DSI(st7701, 0xE0, 0x00, 0x00, 0x02);
 317         ST7701_DSI(st7701, 0xE1, 0x0B, 0x00, 0x0D, 0x00, 0x0C, 0x00, 0x0E,
 318                    0x00, 0x00, 0x44, 0x44);
 319         ST7701_DSI(st7701, 0xE2, 0x33, 0x33, 0x44, 0x44, 0x64, 0x00, 0x66,
 320                    0x00, 0x65, 0x00, 0x67, 0x00, 0x00);
 321         ST7701_DSI(st7701, 0xE3, 0x00, 0x00, 0x33, 0x33);
 322         ST7701_DSI(st7701, 0xE4, 0x44, 0x44);
 323         ST7701_DSI(st7701, 0xE5, 0x0C, 0x78, 0x3C, 0xA0, 0x0E, 0x78, 0x3C,
 324                    0xA0, 0x10, 0x78, 0x3C, 0xA0, 0x12, 0x78, 0x3C, 0xA0);
 325         ST7701_DSI(st7701, 0xE6, 0x00, 0x00, 0x33, 0x33);
 326         ST7701_DSI(st7701, 0xE7, 0x44, 0x44);
 327         ST7701_DSI(st7701, 0xE8, 0x0D, 0x78, 0x3C, 0xA0, 0x0F, 0x78, 0x3C,
 328                    0xA0, 0x11, 0x78, 0x3C, 0xA0, 0x13, 0x78, 0x3C, 0xA0);
 329         ST7701_DSI(st7701, 0xEB, 0x02, 0x02, 0x39, 0x39, 0xEE, 0x44, 0x00);
 330         ST7701_DSI(st7701, 0xEC, 0x00, 0x00);
 331         ST7701_DSI(st7701, 0xED, 0xFF, 0xF1, 0x04, 0x56, 0x72, 0x3F, 0xFF,
 332                    0xFF, 0xFF, 0xFF, 0xF3, 0x27, 0x65, 0x40, 0x1F, 0xFF);
 333 }
 334
 335 static void dmt028vghmcmi_1a_gip_sequence(struct st7701 *st7701)
 336 {
 337         ST7701_DSI(st7701, 0xEE, 0x42);
 338         ST7701_DSI(st7701, 0xE0, 0x00, 0x00, 0x02);
 339
 340         ST7701_DSI(st7701, 0xE1,
 341                    0x04, 0xA0, 0x06, 0xA0,
 342                            0x05, 0xA0, 0x07, 0xA0,
 343                            0x00, 0x44, 0x44);
 344         ST7701_DSI(st7701, 0xE2,
 345                    0x00, 0x00, 0x00, 0x00,
 346                            0x00, 0x00, 0x00, 0x00,
 347                            0x00, 0x00, 0x00, 0x00);
 348         ST7701_DSI(st7701, 0xE3,
 349                    0x00, 0x00, 0x22, 0x22);
 350         ST7701_DSI(st7701, 0xE4, 0x44, 0x44);
 351         ST7701_DSI(st7701, 0xE5,
 352                    0x0C, 0x90, 0xA0, 0xA0,
 353                            0x0E, 0x92, 0xA0, 0xA0,
 354                            0x08, 0x8C, 0xA0, 0xA0,
 355                            0x0A, 0x8E, 0xA0, 0xA0);
 356         ST7701_DSI(st7701, 0xE6,
 357                    0x00, 0x00, 0x22, 0x22);
 358         ST7701_DSI(st7701, 0xE7, 0x44, 0x44);
 359         ST7701_DSI(st7701, 0xE8,
 360                    0x0D, 0x91, 0xA0, 0xA0,
 361                            0x0F, 0x93, 0xA0, 0xA0,
 362                            0x09, 0x8D, 0xA0, 0xA0,
 363                            0x0B, 0x8F, 0xA0, 0xA0);
 364         ST7701_DSI(st7701, 0xEB,
 365                    0x00, 0x00, 0xE4, 0xE4,
 366                            0x44, 0x00, 0x00);
 367         ST7701_DSI(st7701, 0xED,
 368                    0xFF, 0xF5, 0x47, 0x6F,
 369                            0x0B, 0xA1, 0xAB, 0xFF,
 370                            0xFF, 0xBA, 0x1A, 0xB0,
 371                            0xF6, 0x74, 0x5F, 0xFF);
 372         ST7701_DSI(st7701, 0xEF,
 373                    0x08, 0x08, 0x08, 0x40,
 374                            0x3F, 0x64);
 375
 376         st7701_switch_cmd_bkx(st7701, false, 0);
 377
 378         st7701_switch_cmd_bkx(st7701, true, 3);
 379         ST7701_DSI(st7701, 0xE6, 0x7C);
 380         ST7701_DSI(st7701, 0xE8, 0x00, 0x0E);
 381
 382         st7701_switch_cmd_bkx(st7701, false, 0);
 383         ST7701_DSI(st7701, 0x11);
 384         msleep(120);
 385
 386         st7701_switch_cmd_bkx(st7701, true, 3);
 387         ST7701_DSI(st7701, 0xE8, 0x00, 0x0C);
 388         msleep(10);
 389         ST7701_DSI(st7701, 0xE8, 0x00, 0x00);
 390
 391         st7701_switch_cmd_bkx(st7701, false, 0);
 392         ST7701_DSI(st7701, 0x11);
 393         msleep(120);
 394         ST7701_DSI(st7701, 0xE8, 0x00, 0x00);
 395
 396         st7701_switch_cmd_bkx(st7701, false, 0);
 397
 398         ST7701_DSI(st7701, 0x3A, 0x70);
 399 }
 400
 401 static void kd50t048a_gip_sequence(struct st7701 *st7701)
 402 {
 403         /**
 404          * ST7701_SPEC_V1.2 is unable to provide enough information above this
 405          * specific command sequence, so grab the same from vendor BSP driver.
 406          */
 407         ST7701_DSI(st7701, 0xE0, 0x00, 0x00, 0x02);
 408         ST7701_DSI(st7701, 0xE1, 0x08, 0x00, 0x0A, 0x00, 0x07, 0x00, 0x09,
 409                    0x00, 0x00, 0x33, 0x33);
 410         ST7701_DSI(st7701, 0xE2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 411                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
 412         ST7701_DSI(st7701, 0xE3, 0x00, 0x00, 0x33, 0x33);
 413         ST7701_DSI(st7701, 0xE4, 0x44, 0x44);
 414         ST7701_DSI(st7701, 0xE5, 0x0E, 0x60, 0xA0, 0xA0, 0x10, 0x60, 0xA0,
 415                    0xA0, 0x0A, 0x60, 0xA0, 0xA0, 0x0C, 0x60, 0xA0, 0xA0);
 416         ST7701_DSI(st7701, 0xE6, 0x00, 0x00, 0x33, 0x33);
 417         ST7701_DSI(st7701, 0xE7, 0x44, 0x44);
 418         ST7701_DSI(st7701, 0xE8, 0x0D, 0x60, 0xA0, 0xA0, 0x0F, 0x60, 0xA0,
 419                    0xA0, 0x09, 0x60, 0xA0, 0xA0, 0x0B, 0x60, 0xA0, 0xA0);
 420         ST7701_DSI(st7701, 0xEB, 0x02, 0x01, 0xE4, 0xE4, 0x44, 0x00, 0x40);
 421         ST7701_DSI(st7701, 0xEC, 0x02, 0x01);
 422         ST7701_DSI(st7701, 0xED, 0xAB, 0x89, 0x76, 0x54, 0x01, 0xFF, 0xFF,
 423                    0xFF, 0xFF, 0xFF, 0xFF, 0x10, 0x45, 0x67, 0x98, 0xBA);
 424 }
 425
 426 static int st7701_prepare(struct drm_panel *panel)
 427 {
 428         struct st7701 *st7701 = panel_to_st7701(panel);
 429         int ret;
 430
 431         gpiod_set_value(st7701->reset, 0);
 432
 433         ret = regulator_bulk_enable(ARRAY_SIZE(st7701->supplies),
 434                                     st7701->supplies);
 435         if (ret < 0)
 436                 return ret;
 437         msleep(20);
 438
 439         gpiod_set_value(st7701->reset, 1);
 440         msleep(150);
 441
 442         st7701_init_sequence(st7701);
 443
 444         if (st7701->desc->gip_sequence)
 445                 st7701->desc->gip_sequence(st7701);
 446
 447         /* Disable Command2 */
 448         st7701_switch_cmd_bkx(st7701, false, 0);
 449
 450         return 0;
 451 }
 452
 453 static int st7701_enable(struct drm_panel *panel)
 454 {
 455         struct st7701 *st7701 = panel_to_st7701(panel);
 456
 457         ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_ON, 0x00);
 458
 459         return 0;
 460 }
 461
 462 static int st7701_disable(struct drm_panel *panel)
 463 {
 464         struct st7701 *st7701 = panel_to_st7701(panel);
 465
 466         ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_OFF, 0x00);
 467
 468         return 0;
 469 }
 470
 471 static int st7701_unprepare(struct drm_panel *panel)
 472 {
 473         struct st7701 *st7701 = panel_to_st7701(panel);
 474
 475         ST7701_DSI(st7701, MIPI_DCS_ENTER_SLEEP_MODE, 0x00);
 476
 477         msleep(st7701->sleep_delay);
 478
 479         gpiod_set_value(st7701->reset, 0);
 480
 481         /**
 482          * During the Resetting period, the display will be blanked
 483          * (The display is entering blanking sequence, which maximum
 484          * time is 120 ms, when Reset Starts in Sleep Out –mode. The
 485          * display remains the blank state in Sleep In –mode.) and
 486          * then return to Default condition for Hardware Reset.
 487          *
 488          * So we need wait sleep_delay time to make sure reset completed.
 489          */
 490         msleep(st7701->sleep_delay);
 491
 492         regulator_bulk_disable(ARRAY_SIZE(st7701->supplies), st7701->supplies);
 493
 494         return 0;
 495 }
 496
 497 static int st7701_get_modes(struct drm_panel *panel,
 498                             struct drm_connector *connector)
 499 {
 500         struct st7701 *st7701 = panel_to_st7701(panel);
 501         const struct drm_display_mode *desc_mode = st7701->desc->mode;
 502         struct drm_display_mode *mode;
 503
 504         mode = drm_mode_duplicate(connector->dev, desc_mode);
 505         if (!mode) {
 506                 dev_err(&st7701->dsi->dev, "failed to add mode %ux%u@%u\n",
 507                         desc_mode->hdisplay, desc_mode->vdisplay,
 508                         drm_mode_vrefresh(desc_mode));
 509                 return -ENOMEM;
 510         }
 511
 512         drm_mode_set_name(mode);
 513         drm_mode_probed_add(connector, mode);
 514
 515         connector->display_info.width_mm = desc_mode->width_mm;
 516         connector->display_info.height_mm = desc_mode->height_mm;
 517
 518         /*
 519          * TODO: Remove once all drm drivers call
 520          * drm_connector_set_orientation_from_panel()
 521          */
 522         drm_connector_set_panel_orientation(connector, st7701->orientation);
 523
 524         return 1;
 525 }
 526
 527 static enum drm_panel_orientation st7701_get_orientation(struct drm_panel *panel)
 528 {
 529         struct st7701 *st7701 = panel_to_st7701(panel);
 530
 531         return st7701->orientation;
 532 }
 533
 534 static const struct drm_panel_funcs st7701_funcs = {
 535         .disable        = st7701_disable,
 536         .unprepare      = st7701_unprepare,
 537         .prepare        = st7701_prepare,
 538         .enable         = st7701_enable,
 539         .get_modes      = st7701_get_modes,
 540         .get_orientation = st7701_get_orientation,
 541 };
 542
 543 static const struct drm_display_mode ts8550b_mode = {
 544         .clock          = 27500,
 545
 546         .hdisplay       = 480,
 547         .hsync_start    = 480 + 38,
 548         .hsync_end      = 480 + 38 + 12,
 549         .htotal         = 480 + 38 + 12 + 12,
 550
 551         .vdisplay       = 854,
 552         .vsync_start    = 854 + 18,
 553         .vsync_end      = 854 + 18 + 8,
 554         .vtotal         = 854 + 18 + 8 + 4,
 555
 556         .width_mm       = 69,
 557         .height_mm      = 139,
 558
 559         .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 560 };
 561
 562 static const struct st7701_panel_desc ts8550b_desc = {
 563         .mode = &ts8550b_mode,
 564         .lanes = 2,
 565         .format = MIPI_DSI_FMT_RGB888,
 566         .panel_sleep_delay = 80, /* panel need extra 80ms for sleep out cmd */
 567
 568         .pv_gamma = {
 569                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 570                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 571                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 572                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xe),
 573                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 574                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x15),
 575                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xf),
 576
 577                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 578                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x11),
 579                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x8),
 580                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x8),
 581                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 582
 583                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x8),
 584                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x23),
 585                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x4),
 586                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 587                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
 588
 589                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x12),
 590                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 591                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x2b),
 592                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 593                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x34),
 594                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 595                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x1f)
 596         },
 597         .nv_gamma = {
 598                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 599                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 600                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 601                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xe),
 602                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0x2) |
 603                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x15),
 604                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xf),
 605
 606                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 607                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x13),
 608                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x7),
 609                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x9),
 610                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 611
 612                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x8),
 613                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x22),
 614                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x4),
 615                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 616                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x10),
 617
 618                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0xe),
 619                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 620                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x2c),
 621                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 622                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x34),
 623                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 624                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x1f)
 625         },
 626         .nlinv = 7,
 627         .vop_uv = 4400000,
 628         .vcom_uv = 337500,
 629         .vgh_mv = 15000,
 630         .vgl_mv = -9510,
 631         .avdd_mv = 6600,
 632         .avcl_mv = -4400,
 633         .gamma_op_bias = OP_BIAS_MAX,
 634         .input_op_bias = OP_BIAS_MIN,
 635         .output_op_bias = OP_BIAS_MIN,
 636         .t2d_ns = 1600,
 637         .t3d_ns = 10400,
 638         .eot_en = true,
 639         .gip_sequence = ts8550b_gip_sequence,
 640 };
 641
 642 static const struct drm_display_mode dmt028vghmcmi_1a_mode = {
 643         .clock          = 22325,
 644
 645         .hdisplay       = 480,
 646         .hsync_start    = 480 + 40,
 647         .hsync_end      = 480 + 40 + 4,
 648         .htotal         = 480 + 40 + 4 + 20,
 649
 650         .vdisplay       = 640,
 651         .vsync_start    = 640 + 2,
 652         .vsync_end      = 640 + 2 + 40,
 653         .vtotal         = 640 + 2 + 40 + 16,
 654
 655         .width_mm       = 56,
 656         .height_mm      = 78,
 657
 658         .flags          = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 659
 660         .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 661 };
 662
 663 static const struct st7701_panel_desc dmt028vghmcmi_1a_desc = {
 664         .mode = &dmt028vghmcmi_1a_mode,
 665         .lanes = 2,
 666         .format = MIPI_DSI_FMT_RGB888,
 667         .panel_sleep_delay = 5, /* panel need extra 5ms for sleep out cmd */
 668
 669         .pv_gamma = {
 670                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 671                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 672                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 673                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0x10),
 674                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 675                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x17),
 676                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xd),
 677
 678                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 679                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x11),
 680                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x6),
 681                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x5),
 682                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 683
 684                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x7),
 685                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x1f),
 686                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x4),
 687                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 688                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x11),
 689
 690                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0xe),
 691                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 692                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x29),
 693                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 694                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x30),
 695                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 696                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x1f)
 697         },
 698         .nv_gamma = {
 699                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 700                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 701                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 702                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xd),
 703                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 704                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x14),
 705                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xe),
 706
 707                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 708                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x11),
 709                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x6),
 710                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x4),
 711                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 712
 713                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x8),
 714                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x20),
 715                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x5),
 716                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 717                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
 718
 719                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x13),
 720                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 721                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x26),
 722                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 723                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x30),
 724                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 725                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x1f)
 726         },
 727         .nlinv = 1,
 728         .vop_uv = 4800000,
 729         .vcom_uv = 1650000,
 730         .vgh_mv = 15000,
 731         .vgl_mv = -10170,
 732         .avdd_mv = 6600,
 733         .avcl_mv = -4400,
 734         .gamma_op_bias = OP_BIAS_MIDDLE,
 735         .input_op_bias = OP_BIAS_MIN,
 736         .output_op_bias = OP_BIAS_MIN,
 737         .t2d_ns = 1600,
 738         .t3d_ns = 10400,
 739         .eot_en = true,
 740         .gip_sequence = dmt028vghmcmi_1a_gip_sequence,
 741 };
 742
 743 static const struct drm_display_mode kd50t048a_mode = {
 744         .clock          = 27500,
 745
 746         .hdisplay       = 480,
 747         .hsync_start    = 480 + 2,
 748         .hsync_end      = 480 + 2 + 10,
 749         .htotal         = 480 + 2 + 10 + 2,
 750
 751         .vdisplay       = 854,
 752         .vsync_start    = 854 + 2,
 753         .vsync_end      = 854 + 2 + 2,
 754         .vtotal         = 854 + 2 + 2 + 17,
 755
 756         .width_mm       = 69,
 757         .height_mm      = 139,
 758
 759         .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 760 };
 761
 762 static const struct st7701_panel_desc kd50t048a_desc = {
 763         .mode = &kd50t048a_mode,
 764         .lanes = 2,
 765         .format = MIPI_DSI_FMT_RGB888,
 766         .panel_sleep_delay = 0,
 767
 768         .pv_gamma = {
 769                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 770                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 771                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 772                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xd),
 773                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 774                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x14),
 775                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xd),
 776
 777                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 778                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x10),
 779                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x5),
 780                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x2),
 781                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 782
 783                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x8),
 784                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x1e),
 785                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x5),
 786                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 787                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
 788
 789                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x11),
 790                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 2) |
 791                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x23),
 792                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 793                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x29),
 794                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 795                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x18)
 796         },
 797         .nv_gamma = {
 798                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 799                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC0_MASK, 0),
 800                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 801                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC4_MASK, 0xc),
 802                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 803                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC8_MASK, 0x14),
 804                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC16_MASK, 0xc),
 805
 806                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 807                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC24_MASK, 0x10),
 808                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC52_MASK, 0x5),
 809                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC80_MASK, 0x3),
 810                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC108_MASK, 0x8),
 811
 812                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC147_MASK, 0x7),
 813                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC175_MASK, 0x20),
 814                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC203_MASK, 0x5),
 815                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 816                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC231_MASK, 0x13),
 817
 818                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC239_MASK, 0x11),
 819                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 2) |
 820                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC247_MASK, 0x24),
 821                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 822                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC251_MASK, 0x29),
 823                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_AJ_MASK, 0) |
 824                 CFIELD_PREP(DSI_CMD2_BK0_GAMCTRL_VC255_MASK, 0x18)
 825         },
 826         .nlinv = 1,
 827         .vop_uv = 4887500,
 828         .vcom_uv = 937500,
 829         .vgh_mv = 15000,
 830         .vgl_mv = -9510,
 831         .avdd_mv = 6600,
 832         .avcl_mv = -4400,
 833         .gamma_op_bias = OP_BIAS_MIDDLE,
 834         .input_op_bias = OP_BIAS_MIN,
 835         .output_op_bias = OP_BIAS_MIN,
 836         .t2d_ns = 1600,
 837         .t3d_ns = 10400,
 838         .eot_en = true,
 839         .gip_sequence = kd50t048a_gip_sequence,
 840 };
 841
 842 static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
 843 {
 844         const struct st7701_panel_desc *desc;
 845         struct st7701 *st7701;
 846         int ret;
 847
 848         st7701 = devm_kzalloc(&dsi->dev, sizeof(*st7701), GFP_KERNEL);
 849         if (!st7701)
 850                 return -ENOMEM;
 851
 852         desc = of_device_get_match_data(&dsi->dev);
 853         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
 854                           MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
 855         dsi->format = desc->format;
 856         dsi->lanes = desc->lanes;
 857
 858         st7701->supplies[0].supply = "VCC";
 859         st7701->supplies[1].supply = "IOVCC";
 860
 861         ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(st7701->supplies),
 862                                       st7701->supplies);
 863         if (ret < 0)
 864                 return ret;
 865
 866         st7701->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
 867         if (IS_ERR(st7701->reset)) {
 868                 dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
 869                 return PTR_ERR(st7701->reset);
 870         }
 871
 872         ret = of_drm_get_panel_orientation(dsi->dev.of_node, &st7701->orientation);
 873         if (ret < 0)
 874                 return dev_err_probe(&dsi->dev, ret, "Failed to get orientation\n");
 875
 876         drm_panel_init(&st7701->panel, &dsi->dev, &st7701_funcs,
 877                        DRM_MODE_CONNECTOR_DSI);
 878
 879         /**
 880          * Once sleep out has been issued, ST7701 IC required to wait 120ms
 881          * before initiating new commands.
 882          *
 883          * On top of that some panels might need an extra delay to wait, so
 884          * add panel specific delay for those cases. As now this panel specific
 885          * delay information is referenced from those panel BSP driver, example
 886          * ts8550b and there is no valid documentation for that.
 887          */
 888         st7701->sleep_delay = 120 + desc->panel_sleep_delay;
 889
 890         ret = drm_panel_of_backlight(&st7701->panel);
 891         if (ret)
 892                 return ret;
 893
 894         drm_panel_add(&st7701->panel);
 895
 896         mipi_dsi_set_drvdata(dsi, st7701);
 897         st7701->dsi = dsi;
 898         st7701->desc = desc;
 899
 900         ret = mipi_dsi_attach(dsi);
 901         if (ret)
 902                 goto err_attach;
 903
 904         return 0;
 905
 906 err_attach:
 907         drm_panel_remove(&st7701->panel);
 908         return ret;
 909 }
 910
 911 static void st7701_dsi_remove(struct mipi_dsi_device *dsi)
 912 {
 913         struct st7701 *st7701 = mipi_dsi_get_drvdata(dsi);
 914
 915         mipi_dsi_detach(dsi);
 916         drm_panel_remove(&st7701->panel);
 917 }
 918
 919 static const struct of_device_id st7701_of_match[] = {
 920         { .compatible = "densitron,dmt028vghmcmi-1a", .data = &dmt028vghmcmi_1a_desc },
 921         { .compatible = "elida,kd50t048a", .data = &kd50t048a_desc },
 922         { .compatible = "techstar,ts8550b", .data = &ts8550b_desc },
 923         { }
 924 };
 925 MODULE_DEVICE_TABLE(of, st7701_of_match);
 926
 927 static struct mipi_dsi_driver st7701_dsi_driver = {
 928         .probe          = st7701_dsi_probe,
 929         .remove         = st7701_dsi_remove,
 930         .driver = {
 931                 .name           = "st7701",
 932                 .of_match_table = st7701_of_match,
 933         },
 934 };
 935 module_mipi_dsi_driver(st7701_dsi_driver);
 936
 937 MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
 938 MODULE_DESCRIPTION("Sitronix ST7701 LCD Panel Driver");
 939 MODULE_LICENSE("GPL");