target/linux/bcm27xx/patches-5.15/950-0693-drm-panel-Add-panel-driver-for-TDO-Y17B-based-panels.patch

   1 From f493a1250d55c4a61d94f631757186e8beef9d90 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 26 Jan 2022 16:02:31 +0000
   4 Subject: [PATCH] drm/panel: Add panel driver for TDO Y17B based panels
   5
   6 The Top DisplayOptoelectronics (TDO) T17B driver chip is used
   7 in the TL040HDS20CT panel (found in the Pimoroni HyperPixel4
   8 Square display) and potentially other displays.
   9 The driver chip supports SPI for  configuration and DPI
  10 video data.
  11
  12 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  13 ---
  14  drivers/gpu/drm/panel/Kconfig          |  11 +
  15  drivers/gpu/drm/panel/Makefile         |   1 +
  16  drivers/gpu/drm/panel/panel-tdo-y17p.c | 279 +++++++++++++++++++++++++
  17  3 files changed, 291 insertions(+)
  18  create mode 100644 drivers/gpu/drm/panel/panel-tdo-y17p.c
  19
  20 --- a/drivers/gpu/drm/panel/Kconfig
  21 +++ b/drivers/gpu/drm/panel/Kconfig
  22 @@ -560,6 +560,17 @@ config DRM_PANEL_SONY_ACX565AKM
  23           Say Y here if you want to enable support for the Sony ACX565AKM
  24           800x600 3.5" panel (found on the Nokia N900).
  25
  26 +config DRM_PANEL_TPO_Y17P
  27 +       tristate "TDO Y17P-based panels"
  28 +       depends on OF && SPI
  29 +       depends on DRM_KMS_HELPER
  30 +       depends on DRM_KMS_CMA_HELPER
  31 +       depends on BACKLIGHT_CLASS_DEVICE
  32 +       select DRM_MIPI_DBI
  33 +       help
  34 +         Say Y if you want to enable support for panels based on the
  35 +         TDO Y17P controller.
  36 +
  37  config DRM_PANEL_TDO_TL070WSH30
  38         tristate "TDO TL070WSH30 DSI panel"
  39         depends on OF
  40 --- a/drivers/gpu/drm/panel/Makefile
  41 +++ b/drivers/gpu/drm/panel/Makefile
  42 @@ -58,6 +58,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V)
  43  obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o
  44  obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
  45  obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
  46 +obj-$(CONFIG_DRM_PANEL_TPO_Y17P) += panel-tdo-y17p.o
  47  obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
  48  obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
  49  obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
  50 --- /dev/null
  51 +++ b/drivers/gpu/drm/panel/panel-tdo-y17p.c
  52 @@ -0,0 +1,279 @@
  53 +// SPDX-License-Identifier: GPL-2.0-only
  54 +/*
  55 + * TDO Y17P TFT LCD drm_panel driver.
  56 + *
  57 + * SPI configured DPI display controller
  58 + * Copyright (C) 2022 Raspberry Pi Ltd
  59 + *
  60 + * Derived from drivers/drm/gpu/panel/panel-sitronix-st7789v.c
  61 + * Copyright (C) 2017 Free Electrons
  62 + */
  63 +
  64 +#include <drm/drm_modes.h>
  65 +#include <drm/drm_panel.h>
  66 +
  67 +#include <linux/bitops.h>
  68 +#include <linux/gpio/consumer.h>
  69 +#include <linux/media-bus-format.h>
  70 +#include <linux/module.h>
  71 +#include <linux/of_device.h>
  72 +#include <linux/regmap.h>
  73 +#include <linux/regulator/consumer.h>
  74 +#include <linux/spi/spi.h>
  75 +
  76 +#include <video/mipi_display.h>
  77 +#include <video/of_videomode.h>
  78 +#include <video/videomode.h>
  79 +
  80 +struct tdo_y17p {
  81 +       struct drm_panel panel;
  82 +       struct spi_device *spi;
  83 +       struct gpio_desc *reset;
  84 +       struct regulator *power;
  85 +       u32 bus_format;
  86 +};
  87 +
  88 +static const u16 panel_init[] = {
  89 +       0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x101, 0x008, 0x110,
  90 +       0x021, 0x109, 0x030, 0x102, 0x031, 0x100, 0x040, 0x110,
  91 +       0x041, 0x155, 0x042, 0x102, 0x043, 0x109, 0x044, 0x107,
  92 +       0x050, 0x178, 0x051, 0x178, 0x052, 0x100, 0x053, 0x16d,
  93 +       0x060, 0x107, 0x061, 0x100, 0x062, 0x108, 0x063, 0x100,
  94 +       0x0a0, 0x100, 0x0a1, 0x107, 0x0a2, 0x10c, 0x0a3, 0x10b,
  95 +       0x0a4, 0x103, 0x0a5, 0x107, 0x0a6, 0x106, 0x0a7, 0x104,
  96 +       0x0a8, 0x108, 0x0a9, 0x10c, 0x0aa, 0x113, 0x0ab, 0x106,
  97 +       0x0ac, 0x10d, 0x0ad, 0x119, 0x0ae, 0x110, 0x0af, 0x100,
  98 +       0x0c0, 0x100, 0x0c1, 0x107, 0x0c2, 0x10c, 0x0c3, 0x10b,
  99 +       0x0c4, 0x103, 0x0c5, 0x107, 0x0c6, 0x107, 0x0c7, 0x104,
 100 +       0x0c8, 0x108, 0x0c9, 0x10c, 0x0ca, 0x113, 0x0cb, 0x106,
 101 +       0x0cc, 0x10d, 0x0cd, 0x118, 0x0ce, 0x110, 0x0cf, 0x100,
 102 +       0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x106, 0x000, 0x120,
 103 +       0x001, 0x10a, 0x002, 0x100, 0x003, 0x100, 0x004, 0x101,
 104 +       0x005, 0x101, 0x006, 0x198, 0x007, 0x106, 0x008, 0x101,
 105 +       0x009, 0x180, 0x00a, 0x100, 0x00b, 0x100, 0x00c, 0x101,
 106 +       0x00d, 0x101, 0x00e, 0x100, 0x00f, 0x100, 0x010, 0x1f0,
 107 +       0x011, 0x1f4, 0x012, 0x101, 0x013, 0x100, 0x014, 0x100,
 108 +       0x015, 0x1c0, 0x016, 0x108, 0x017, 0x100, 0x018, 0x100,
 109 +       0x019, 0x100, 0x01a, 0x100, 0x01b, 0x100, 0x01c, 0x100,
 110 +       0x01d, 0x100, 0x020, 0x101, 0x021, 0x123, 0x022, 0x145,
 111 +       0x023, 0x167, 0x024, 0x101, 0x025, 0x123, 0x026, 0x145,
 112 +       0x027, 0x167, 0x030, 0x111, 0x031, 0x111, 0x032, 0x100,
 113 +       0x033, 0x1ee, 0x034, 0x1ff, 0x035, 0x1bb, 0x036, 0x1aa,
 114 +       0x037, 0x1dd, 0x038, 0x1cc, 0x039, 0x166, 0x03a, 0x177,
 115 +       0x03b, 0x122, 0x03c, 0x122, 0x03d, 0x122, 0x03e, 0x122,
 116 +       0x03f, 0x122, 0x040, 0x122, 0x052, 0x110, 0x053, 0x110,
 117 +       0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x107, 0x018, 0x11d,
 118 +       0x017, 0x122, 0x002, 0x177, 0x026, 0x1b2, 0x0e1, 0x179,
 119 +       0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x100, 0x03a, 0x160,
 120 +       0x035, 0x100, 0x011, 0x100,
 121 +};
 122 +
 123 +#define NUM_INIT_REGS ARRAY_SIZE(panel_init)
 124 +
 125 +static inline struct tdo_y17p *panel_to_tdo_y17p(struct drm_panel *panel)
 126 +{
 127 +       return container_of(panel, struct tdo_y17p, panel);
 128 +}
 129 +
 130 +static int tdo_y17p_write_msg(struct tdo_y17p *ctx, const u16 *msg, unsigned int len)
 131 +{
 132 +       struct spi_transfer xfer = { };
 133 +       struct spi_message spi;
 134 +
 135 +       spi_message_init(&spi);
 136 +
 137 +       xfer.tx_buf = msg;
 138 +       xfer.bits_per_word = 9;
 139 +       xfer.len = sizeof(u16) * len;
 140 +
 141 +       spi_message_add_tail(&xfer, &spi);
 142 +       return spi_sync(ctx->spi, &spi);
 143 +}
 144 +
 145 +static const struct drm_display_mode tdo_y17pe_720x720_mode = {
 146 +       .clock = 36720,
 147 +       .hdisplay = 720,
 148 +       .hsync_start = 720 + 20,
 149 +       .hsync_end = 720 + 20 + 20,
 150 +       .htotal = 720 + 20 + 20 + 40,
 151 +       .vdisplay = 720,
 152 +       .vsync_start = 720 + 15,
 153 +       .vsync_end = 720 + 15 + 15,
 154 +       .vtotal = 720 + 15 + 15 + 15,
 155 +       .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
 156 +};
 157 +
 158 +static int tdo_y17p_get_modes(struct drm_panel *panel,
 159 +                             struct drm_connector *connector)
 160 +{
 161 +       struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
 162 +       struct drm_display_mode *mode;
 163 +
 164 +       mode = drm_mode_duplicate(connector->dev, &tdo_y17pe_720x720_mode);
 165 +       if (!mode) {
 166 +               dev_err(panel->dev, "failed to add mode %ux%ux@%u\n",
 167 +                       tdo_y17pe_720x720_mode.hdisplay,
 168 +                       tdo_y17pe_720x720_mode.vdisplay,
 169 +                       drm_mode_vrefresh(&tdo_y17pe_720x720_mode));
 170 +               return -ENOMEM;
 171 +       }
 172 +
 173 +       drm_mode_set_name(mode);
 174 +
 175 +       mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
 176 +       drm_mode_probed_add(connector, mode);
 177 +
 178 +       connector->display_info.width_mm = 72;
 179 +       connector->display_info.height_mm = 72;
 180 +       drm_display_info_set_bus_formats(&connector->display_info,
 181 +                                        &ctx->bus_format, 1);
 182 +       connector->display_info.bus_flags = 0;
 183 +
 184 +       return 1;
 185 +}
 186 +
 187 +static int tdo_y17p_prepare(struct drm_panel *panel)
 188 +{
 189 +       struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
 190 +       int ret;
 191 +
 192 +       ret = regulator_enable(ctx->power);
 193 +       if (ret)
 194 +               return ret;
 195 +
 196 +       ret = tdo_y17p_write_msg(ctx, panel_init, NUM_INIT_REGS);
 197 +
 198 +       msleep(120);
 199 +
 200 +       return ret;
 201 +}
 202 +
 203 +static int tdo_y17p_enable(struct drm_panel *panel)
 204 +{
 205 +       struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
 206 +       const u16 msg[] = { MIPI_DCS_SET_DISPLAY_ON };
 207 +       int ret;
 208 +
 209 +       ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
 210 +
 211 +       return ret;
 212 +}
 213 +
 214 +static int tdo_y17p_disable(struct drm_panel *panel)
 215 +{
 216 +       struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
 217 +       const u16 msg[] = { MIPI_DCS_SET_DISPLAY_OFF };
 218 +       int ret;
 219 +
 220 +       ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
 221 +
 222 +       return ret;
 223 +}
 224 +
 225 +static int tdo_y17p_unprepare(struct drm_panel *panel)
 226 +{
 227 +       struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
 228 +       const u16 msg[] = { MIPI_DCS_ENTER_SLEEP_MODE };
 229 +       int ret;
 230 +
 231 +       ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
 232 +
 233 +       return ret;
 234 +}
 235 +
 236 +static const struct drm_panel_funcs tdo_y17p_drm_funcs = {
 237 +       .disable        = tdo_y17p_disable,
 238 +       .enable         = tdo_y17p_enable,
 239 +       .get_modes      = tdo_y17p_get_modes,
 240 +       .prepare        = tdo_y17p_prepare,
 241 +       .unprepare      = tdo_y17p_unprepare,
 242 +};
 243 +
 244 +static const struct of_device_id tdo_y17p_of_match[] = {
 245 +       {       .compatible = "tdo,tl040hds20ct",
 246 +               .data = (void *)MEDIA_BUS_FMT_BGR888_1X24,
 247 +       }, {
 248 +               .compatible = "pimoroni,hyperpixel4square",
 249 +               .data = (void *)MEDIA_BUS_FMT_BGR666_1X24_CPADHI,
 250 +       }, {
 251 +               .compatible = "tdo,y17p",
 252 +               .data = (void *)MEDIA_BUS_FMT_BGR888_1X24,
 253 +       }, {
 254 +               /* sentinel */
 255 +       }
 256 +};
 257 +MODULE_DEVICE_TABLE(of, tdo_y17p_of_match);
 258 +
 259 +static int tdo_y17p_probe(struct spi_device *spi)
 260 +{
 261 +       const struct of_device_id *id;
 262 +       struct tdo_y17p *ctx;
 263 +       int ret;
 264 +
 265 +       ctx = devm_kzalloc(&spi->dev, sizeof(*ctx), GFP_KERNEL);
 266 +       if (!ctx)
 267 +               return -ENOMEM;
 268 +
 269 +       id = of_match_node(tdo_y17p_of_match, spi->dev.of_node);
 270 +       if (!id)
 271 +               return -ENODEV;
 272 +
 273 +       ctx->bus_format = (u32)id->data;
 274 +
 275 +       spi_set_drvdata(spi, ctx);
 276 +       ctx->spi = spi;
 277 +
 278 +       drm_panel_init(&ctx->panel, &spi->dev, &tdo_y17p_drm_funcs,
 279 +                      DRM_MODE_CONNECTOR_DPI);
 280 +
 281 +       ctx->power = devm_regulator_get(&spi->dev, "power");
 282 +       if (IS_ERR(ctx->power))
 283 +               return PTR_ERR(ctx->power);
 284 +
 285 +       ctx->reset = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
 286 +       if (IS_ERR(ctx->reset)) {
 287 +               dev_err(&spi->dev, "Couldn't get our reset line\n");
 288 +               return PTR_ERR(ctx->reset);
 289 +       }
 290 +
 291 +       ret = drm_panel_of_backlight(&ctx->panel);
 292 +       if (ret)
 293 +               return ret;
 294 +
 295 +       drm_panel_add(&ctx->panel);
 296 +
 297 +       return 0;
 298 +}
 299 +
 300 +static int tdo_y17p_remove(struct spi_device *spi)
 301 +{
 302 +       struct tdo_y17p *ctx = spi_get_drvdata(spi);
 303 +
 304 +       drm_panel_remove(&ctx->panel);
 305 +
 306 +       return 0;
 307 +}
 308 +
 309 +static const struct spi_device_id tdo_y17p_ids[] = {
 310 +       { "tl040hds20ct", 0 },
 311 +       { "hyperpixel4square", 0 },
 312 +       { "y17p", 0 },
 313 +       { /* sentinel */ }
 314 +};
 315 +
 316 +MODULE_DEVICE_TABLE(spi, tdo_y17p_ids);
 317 +
 318 +static struct spi_driver tdo_y17p_driver = {
 319 +       .probe = tdo_y17p_probe,
 320 +       .remove = tdo_y17p_remove,
 321 +       .driver = {
 322 +               .name = "tdo_y17p",
 323 +               .of_match_table = tdo_y17p_of_match,
 324 +       },
 325 +       .id_table = tdo_y17p_ids,
 326 +};
 327 +module_spi_driver(tdo_y17p_driver);
 328 +
 329 +MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com>");
 330 +MODULE_DESCRIPTION("TDO Y17P LCD panel driver");
 331 +MODULE_LICENSE("GPL v2");