1*249a4f5eSChris Morgan // SPDX-License-Identifier: GPL-2.0 2*249a4f5eSChris Morgan /* 3*249a4f5eSChris Morgan * Magnachip d53e6ea8966 MIPI-DSI panel driver 4*249a4f5eSChris Morgan * Copyright (C) 2023 Chris Morgan 5*249a4f5eSChris Morgan */ 6*249a4f5eSChris Morgan 7*249a4f5eSChris Morgan #include <drm/drm_mipi_dbi.h> 8*249a4f5eSChris Morgan #include <drm/drm_mipi_dsi.h> 9*249a4f5eSChris Morgan #include <drm/drm_modes.h> 10*249a4f5eSChris Morgan #include <drm/drm_of.h> 11*249a4f5eSChris Morgan #include <drm/drm_panel.h> 12*249a4f5eSChris Morgan 13*249a4f5eSChris Morgan #include <linux/backlight.h> 14*249a4f5eSChris Morgan #include <linux/delay.h> 15*249a4f5eSChris Morgan #include <linux/gpio/consumer.h> 16*249a4f5eSChris Morgan #include <linux/init.h> 17*249a4f5eSChris Morgan #include <linux/kernel.h> 18*249a4f5eSChris Morgan #include <linux/media-bus-format.h> 19*249a4f5eSChris Morgan #include <linux/module.h> 20*249a4f5eSChris Morgan #include <linux/of.h> 21*249a4f5eSChris Morgan #include <linux/of_device.h> 22*249a4f5eSChris Morgan #include <linux/regulator/consumer.h> 23*249a4f5eSChris Morgan #include <linux/spi/spi.h> 24*249a4f5eSChris Morgan 25*249a4f5eSChris Morgan #include <video/mipi_display.h> 26*249a4f5eSChris Morgan 27*249a4f5eSChris Morgan /* Forward declaration for use in backlight function */ 28*249a4f5eSChris Morgan struct d53e6ea8966; 29*249a4f5eSChris Morgan 30*249a4f5eSChris Morgan /* Panel info, unique to each panel */ 31*249a4f5eSChris Morgan struct d53e6ea8966_panel_info { 32*249a4f5eSChris Morgan /** @display_modes: the supported display modes */ 33*249a4f5eSChris Morgan const struct drm_display_mode *display_modes; 34*249a4f5eSChris Morgan /** @num_modes: the number of supported display modes */ 35*249a4f5eSChris Morgan unsigned int num_modes; 36*249a4f5eSChris Morgan /** @width_mm: panel width in mm */ 37*249a4f5eSChris Morgan u16 width_mm; 38*249a4f5eSChris Morgan /** @height_mm: panel height in mm */ 39*249a4f5eSChris Morgan u16 height_mm; 40*249a4f5eSChris Morgan /** @bus_flags: drm bus flags for panel */ 41*249a4f5eSChris Morgan u32 bus_flags; 42*249a4f5eSChris Morgan /** @panel_init_seq: panel specific init sequence */ 43*249a4f5eSChris Morgan void (*panel_init_seq)(struct d53e6ea8966 *db); 44*249a4f5eSChris Morgan /** @backlight_register: panel backlight registration or NULL */ 45*249a4f5eSChris Morgan int (*backlight_register)(struct d53e6ea8966 *db); 46*249a4f5eSChris Morgan }; 47*249a4f5eSChris Morgan 48*249a4f5eSChris Morgan struct d53e6ea8966 { 49*249a4f5eSChris Morgan /** @dev: the container device */ 50*249a4f5eSChris Morgan struct device *dev; 51*249a4f5eSChris Morgan /** @dbi: the DBI bus abstraction handle */ 52*249a4f5eSChris Morgan struct mipi_dbi dbi; 53*249a4f5eSChris Morgan /** @panel: the DRM panel instance for this device */ 54*249a4f5eSChris Morgan struct drm_panel panel; 55*249a4f5eSChris Morgan /** @reset: reset GPIO line */ 56*249a4f5eSChris Morgan struct gpio_desc *reset; 57*249a4f5eSChris Morgan /** @enable: enable GPIO line */ 58*249a4f5eSChris Morgan struct gpio_desc *enable; 59*249a4f5eSChris Morgan /** @reg_vdd: VDD supply regulator for panel logic */ 60*249a4f5eSChris Morgan struct regulator *reg_vdd; 61*249a4f5eSChris Morgan /** @reg_elvdd: ELVDD supply regulator for panel display */ 62*249a4f5eSChris Morgan struct regulator *reg_elvdd; 63*249a4f5eSChris Morgan /** @dsi_dev: DSI child device (panel) */ 64*249a4f5eSChris Morgan struct mipi_dsi_device *dsi_dev; 65*249a4f5eSChris Morgan /** @bl_dev: pseudo-backlight device for oled panel */ 66*249a4f5eSChris Morgan struct backlight_device *bl_dev; 67*249a4f5eSChris Morgan /** @panel_info: struct containing panel timing and info */ 68*249a4f5eSChris Morgan const struct d53e6ea8966_panel_info *panel_info; 69*249a4f5eSChris Morgan }; 70*249a4f5eSChris Morgan 71*249a4f5eSChris Morgan #define NUM_GAMMA_LEVELS 16 72*249a4f5eSChris Morgan #define GAMMA_TABLE_COUNT 23 73*249a4f5eSChris Morgan #define MAX_BRIGHTNESS (NUM_GAMMA_LEVELS - 1) 74*249a4f5eSChris Morgan 75*249a4f5eSChris Morgan #define MCS_ELVSS_ON 0xb1 76*249a4f5eSChris Morgan #define MCS_TEMP_SWIRE 0xb2 77*249a4f5eSChris Morgan #define MCS_PASSWORD_0 0xf0 78*249a4f5eSChris Morgan #define MCS_PASSWORD_1 0xf1 79*249a4f5eSChris Morgan #define MCS_ANALOG_PWR_CTL_0 0xf4 80*249a4f5eSChris Morgan #define MCS_ANALOG_PWR_CTL_1 0xf5 81*249a4f5eSChris Morgan #define MCS_GTCON_SET 0xf7 82*249a4f5eSChris Morgan #define MCS_GATELESS_SIGNAL_SET 0xf8 83*249a4f5eSChris Morgan #define MCS_SET_GAMMA 0xf9 84*249a4f5eSChris Morgan 85*249a4f5eSChris Morgan static inline struct d53e6ea8966 *to_d53e6ea8966(struct drm_panel *panel) 86*249a4f5eSChris Morgan { 87*249a4f5eSChris Morgan return container_of(panel, struct d53e6ea8966, panel); 88*249a4f5eSChris Morgan } 89*249a4f5eSChris Morgan 90*249a4f5eSChris Morgan /* Table of gamma values provided in datasheet */ 91*249a4f5eSChris Morgan static u8 ams495qa01_gamma[NUM_GAMMA_LEVELS][GAMMA_TABLE_COUNT] = { 92*249a4f5eSChris Morgan {0x01, 0x79, 0x78, 0x8d, 0xd9, 0xdf, 0xd5, 0xcb, 0xcf, 0xc5, 93*249a4f5eSChris Morgan 0xe5, 0xe0, 0xe4, 0xdc, 0xb8, 0xd4, 0xfa, 0xed, 0xe6, 0x2f, 94*249a4f5eSChris Morgan 0x00, 0x2f}, 95*249a4f5eSChris Morgan {0x01, 0x7d, 0x7c, 0x92, 0xd7, 0xdd, 0xd2, 0xcb, 0xd0, 0xc6, 96*249a4f5eSChris Morgan 0xe5, 0xe1, 0xe3, 0xda, 0xbd, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 97*249a4f5eSChris Morgan 0x00, 0x2f}, 98*249a4f5eSChris Morgan {0x01, 0x7f, 0x7e, 0x95, 0xd7, 0xde, 0xd2, 0xcb, 0xcf, 0xc5, 99*249a4f5eSChris Morgan 0xe5, 0xe3, 0xe3, 0xda, 0xbf, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 100*249a4f5eSChris Morgan 0x00, 0x2f}, 101*249a4f5eSChris Morgan {0x01, 0x82, 0x81, 0x99, 0xd6, 0xdd, 0xd1, 0xca, 0xcf, 0xc3, 102*249a4f5eSChris Morgan 0xe4, 0xe3, 0xe3, 0xda, 0xc2, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 103*249a4f5eSChris Morgan 0x00, 0x2f}, 104*249a4f5eSChris Morgan {0x01, 0x84, 0x83, 0x9b, 0xd7, 0xde, 0xd2, 0xc8, 0xce, 0xc2, 105*249a4f5eSChris Morgan 0xe4, 0xe3, 0xe2, 0xd9, 0xc3, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 106*249a4f5eSChris Morgan 0x00, 0x2f}, 107*249a4f5eSChris Morgan {0x01, 0x87, 0x86, 0x9f, 0xd6, 0xdd, 0xd1, 0xc7, 0xce, 0xc1, 108*249a4f5eSChris Morgan 0xe4, 0xe3, 0xe2, 0xd9, 0xc6, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 109*249a4f5eSChris Morgan 0x00, 0x2f}, 110*249a4f5eSChris Morgan {0x01, 0x89, 0x89, 0xa2, 0xd5, 0xdb, 0xcf, 0xc8, 0xcf, 0xc2, 111*249a4f5eSChris Morgan 0xe3, 0xe3, 0xe1, 0xd9, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 112*249a4f5eSChris Morgan 0x00, 0x2f}, 113*249a4f5eSChris Morgan {0x01, 0x8b, 0x8b, 0xa5, 0xd5, 0xdb, 0xcf, 0xc7, 0xce, 0xc0, 114*249a4f5eSChris Morgan 0xe3, 0xe3, 0xe1, 0xd8, 0xc7, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 115*249a4f5eSChris Morgan 0x00, 0x2f}, 116*249a4f5eSChris Morgan {0x01, 0x8d, 0x8d, 0xa7, 0xd5, 0xdb, 0xcf, 0xc6, 0xce, 0xc0, 117*249a4f5eSChris Morgan 0xe4, 0xe4, 0xe1, 0xd7, 0xc8, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 118*249a4f5eSChris Morgan 0x00, 0x2f}, 119*249a4f5eSChris Morgan {0x01, 0x8f, 0x8f, 0xaa, 0xd4, 0xdb, 0xce, 0xc6, 0xcd, 0xbf, 120*249a4f5eSChris Morgan 0xe3, 0xe3, 0xe1, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 121*249a4f5eSChris Morgan 0x00, 0x2f}, 122*249a4f5eSChris Morgan {0x01, 0x91, 0x91, 0xac, 0xd3, 0xda, 0xce, 0xc5, 0xcd, 0xbe, 123*249a4f5eSChris Morgan 0xe3, 0xe3, 0xe0, 0xd7, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 124*249a4f5eSChris Morgan 0x00, 0x2f}, 125*249a4f5eSChris Morgan {0x01, 0x93, 0x93, 0xaf, 0xd3, 0xda, 0xcd, 0xc5, 0xcd, 0xbe, 126*249a4f5eSChris Morgan 0xe2, 0xe3, 0xdf, 0xd6, 0xca, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 127*249a4f5eSChris Morgan 0x00, 0x2f}, 128*249a4f5eSChris Morgan {0x01, 0x95, 0x95, 0xb1, 0xd2, 0xd9, 0xcc, 0xc4, 0xcd, 0xbe, 129*249a4f5eSChris Morgan 0xe2, 0xe3, 0xdf, 0xd7, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 130*249a4f5eSChris Morgan 0x00, 0x2f}, 131*249a4f5eSChris Morgan {0x01, 0x99, 0x99, 0xb6, 0xd1, 0xd9, 0xcc, 0xc3, 0xcb, 0xbc, 132*249a4f5eSChris Morgan 0xe2, 0xe4, 0xdf, 0xd6, 0xcc, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 133*249a4f5eSChris Morgan 0x00, 0x2f}, 134*249a4f5eSChris Morgan {0x01, 0x9c, 0x9c, 0xba, 0xd0, 0xd8, 0xcb, 0xc3, 0xcb, 0xbb, 135*249a4f5eSChris Morgan 0xe2, 0xe4, 0xdf, 0xd6, 0xce, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 136*249a4f5eSChris Morgan 0x00, 0x2f}, 137*249a4f5eSChris Morgan {0x01, 0x9f, 0x9f, 0xbe, 0xcf, 0xd7, 0xc9, 0xc2, 0xcb, 0xbb, 138*249a4f5eSChris Morgan 0xe1, 0xe3, 0xde, 0xd6, 0xd0, 0xd3, 0xfa, 0xed, 0xe6, 0x2f, 139*249a4f5eSChris Morgan 0x00, 0x2f}, 140*249a4f5eSChris Morgan }; 141*249a4f5eSChris Morgan 142*249a4f5eSChris Morgan /* 143*249a4f5eSChris Morgan * Table of elvss values provided in datasheet and corresponds to 144*249a4f5eSChris Morgan * gamma values. 145*249a4f5eSChris Morgan */ 146*249a4f5eSChris Morgan static u8 ams495qa01_elvss[NUM_GAMMA_LEVELS] = { 147*249a4f5eSChris Morgan 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 148*249a4f5eSChris Morgan 0x15, 0x15, 0x14, 0x14, 0x13, 0x12, 149*249a4f5eSChris Morgan }; 150*249a4f5eSChris Morgan 151*249a4f5eSChris Morgan static int ams495qa01_update_gamma(struct mipi_dbi *dbi, int brightness) 152*249a4f5eSChris Morgan { 153*249a4f5eSChris Morgan int tmp = brightness; 154*249a4f5eSChris Morgan 155*249a4f5eSChris Morgan mipi_dbi_command_buf(dbi, MCS_SET_GAMMA, ams495qa01_gamma[tmp], 156*249a4f5eSChris Morgan ARRAY_SIZE(ams495qa01_gamma[tmp])); 157*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_SET_GAMMA, 0x00); 158*249a4f5eSChris Morgan 159*249a4f5eSChris Morgan /* Undocumented command */ 160*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0x26, 0x00); 161*249a4f5eSChris Morgan 162*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_TEMP_SWIRE, ams495qa01_elvss[tmp]); 163*249a4f5eSChris Morgan 164*249a4f5eSChris Morgan return 0; 165*249a4f5eSChris Morgan } 166*249a4f5eSChris Morgan 167*249a4f5eSChris Morgan static void ams495qa01_panel_init(struct d53e6ea8966 *db) 168*249a4f5eSChris Morgan { 169*249a4f5eSChris Morgan struct mipi_dbi *dbi = &db->dbi; 170*249a4f5eSChris Morgan 171*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_PASSWORD_0, 0x5a, 0x5a); 172*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_PASSWORD_1, 0x5a, 0x5a); 173*249a4f5eSChris Morgan 174*249a4f5eSChris Morgan /* Undocumented commands */ 175*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xb0, 0x02); 176*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xf3, 0x3b); 177*249a4f5eSChris Morgan 178*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_ANALOG_PWR_CTL_0, 0x33, 0x42, 0x00, 0x08); 179*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_ANALOG_PWR_CTL_1, 0x00, 0x06, 0x26, 0x35, 0x03); 180*249a4f5eSChris Morgan 181*249a4f5eSChris Morgan /* Undocumented commands */ 182*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xf6, 0x02); 183*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xc6, 0x0b, 0x00, 0x00, 0x3c, 0x00, 0x22, 184*249a4f5eSChris Morgan 0x00, 0x00, 0x00, 0x00); 185*249a4f5eSChris Morgan 186*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_GTCON_SET, 0x20); 187*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_TEMP_SWIRE, 0x06, 0x06, 0x06, 0x06); 188*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_ELVSS_ON, 0x07, 0x00, 0x10); 189*249a4f5eSChris Morgan mipi_dbi_command(dbi, MCS_GATELESS_SIGNAL_SET, 0x7f, 0x7a, 190*249a4f5eSChris Morgan 0x89, 0x67, 0x26, 0x38, 0x00, 0x00, 0x09, 191*249a4f5eSChris Morgan 0x67, 0x70, 0x88, 0x7a, 0x76, 0x05, 0x09, 192*249a4f5eSChris Morgan 0x23, 0x23, 0x23); 193*249a4f5eSChris Morgan 194*249a4f5eSChris Morgan /* Undocumented commands */ 195*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xb5, 0xff, 0xef, 0x35, 0x42, 0x0d, 0xd7, 196*249a4f5eSChris Morgan 0xff, 0x07, 0xff, 0xff, 0xfd, 0x00, 0x01, 197*249a4f5eSChris Morgan 0xff, 0x05, 0x12, 0x0f, 0xff, 0xff, 0xff, 198*249a4f5eSChris Morgan 0xff); 199*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xb4, 0x15); 200*249a4f5eSChris Morgan mipi_dbi_command(dbi, 0xb3, 0x00); 201*249a4f5eSChris Morgan 202*249a4f5eSChris Morgan ams495qa01_update_gamma(dbi, MAX_BRIGHTNESS); 203*249a4f5eSChris Morgan } 204*249a4f5eSChris Morgan 205*249a4f5eSChris Morgan static int d53e6ea8966_prepare(struct drm_panel *panel) 206*249a4f5eSChris Morgan { 207*249a4f5eSChris Morgan struct d53e6ea8966 *db = to_d53e6ea8966(panel); 208*249a4f5eSChris Morgan int ret; 209*249a4f5eSChris Morgan 210*249a4f5eSChris Morgan /* Power up */ 211*249a4f5eSChris Morgan ret = regulator_enable(db->reg_vdd); 212*249a4f5eSChris Morgan if (ret) { 213*249a4f5eSChris Morgan dev_err(db->dev, "failed to enable vdd regulator: %d\n", ret); 214*249a4f5eSChris Morgan return ret; 215*249a4f5eSChris Morgan } 216*249a4f5eSChris Morgan 217*249a4f5eSChris Morgan if (db->reg_elvdd) { 218*249a4f5eSChris Morgan ret = regulator_enable(db->reg_elvdd); 219*249a4f5eSChris Morgan if (ret) { 220*249a4f5eSChris Morgan dev_err(db->dev, 221*249a4f5eSChris Morgan "failed to enable elvdd regulator: %d\n", ret); 222*249a4f5eSChris Morgan regulator_disable(db->reg_vdd); 223*249a4f5eSChris Morgan return ret; 224*249a4f5eSChris Morgan } 225*249a4f5eSChris Morgan } 226*249a4f5eSChris Morgan 227*249a4f5eSChris Morgan /* Enable */ 228*249a4f5eSChris Morgan if (db->enable) 229*249a4f5eSChris Morgan gpiod_set_value_cansleep(db->enable, 1); 230*249a4f5eSChris Morgan 231*249a4f5eSChris Morgan msleep(50); 232*249a4f5eSChris Morgan 233*249a4f5eSChris Morgan /* Reset */ 234*249a4f5eSChris Morgan gpiod_set_value_cansleep(db->reset, 1); 235*249a4f5eSChris Morgan usleep_range(1000, 5000); 236*249a4f5eSChris Morgan gpiod_set_value_cansleep(db->reset, 0); 237*249a4f5eSChris Morgan msleep(20); 238*249a4f5eSChris Morgan 239*249a4f5eSChris Morgan db->panel_info->panel_init_seq(db); 240*249a4f5eSChris Morgan 241*249a4f5eSChris Morgan return 0; 242*249a4f5eSChris Morgan } 243*249a4f5eSChris Morgan 244*249a4f5eSChris Morgan static int d53e6ea8966_enable(struct drm_panel *panel) 245*249a4f5eSChris Morgan { 246*249a4f5eSChris Morgan struct d53e6ea8966 *db = to_d53e6ea8966(panel); 247*249a4f5eSChris Morgan struct mipi_dbi *dbi = &db->dbi; 248*249a4f5eSChris Morgan 249*249a4f5eSChris Morgan mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); 250*249a4f5eSChris Morgan msleep(200); 251*249a4f5eSChris Morgan mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); 252*249a4f5eSChris Morgan usleep_range(10000, 15000); 253*249a4f5eSChris Morgan 254*249a4f5eSChris Morgan return 0; 255*249a4f5eSChris Morgan } 256*249a4f5eSChris Morgan 257*249a4f5eSChris Morgan static int d53e6ea8966_disable(struct drm_panel *panel) 258*249a4f5eSChris Morgan { 259*249a4f5eSChris Morgan struct d53e6ea8966 *db = to_d53e6ea8966(panel); 260*249a4f5eSChris Morgan struct mipi_dbi *dbi = &db->dbi; 261*249a4f5eSChris Morgan 262*249a4f5eSChris Morgan mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); 263*249a4f5eSChris Morgan msleep(20); 264*249a4f5eSChris Morgan mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE); 265*249a4f5eSChris Morgan msleep(100); 266*249a4f5eSChris Morgan 267*249a4f5eSChris Morgan return 0; 268*249a4f5eSChris Morgan } 269*249a4f5eSChris Morgan 270*249a4f5eSChris Morgan static int d53e6ea8966_unprepare(struct drm_panel *panel) 271*249a4f5eSChris Morgan { 272*249a4f5eSChris Morgan struct d53e6ea8966 *db = to_d53e6ea8966(panel); 273*249a4f5eSChris Morgan 274*249a4f5eSChris Morgan if (db->enable) 275*249a4f5eSChris Morgan gpiod_set_value_cansleep(db->enable, 0); 276*249a4f5eSChris Morgan 277*249a4f5eSChris Morgan gpiod_set_value_cansleep(db->reset, 1); 278*249a4f5eSChris Morgan 279*249a4f5eSChris Morgan if (db->reg_elvdd) 280*249a4f5eSChris Morgan regulator_disable(db->reg_elvdd); 281*249a4f5eSChris Morgan 282*249a4f5eSChris Morgan regulator_disable(db->reg_vdd); 283*249a4f5eSChris Morgan msleep(100); 284*249a4f5eSChris Morgan 285*249a4f5eSChris Morgan return 0; 286*249a4f5eSChris Morgan } 287*249a4f5eSChris Morgan 288*249a4f5eSChris Morgan static int d53e6ea8966_get_modes(struct drm_panel *panel, 289*249a4f5eSChris Morgan struct drm_connector *connector) 290*249a4f5eSChris Morgan { 291*249a4f5eSChris Morgan struct d53e6ea8966 *db = to_d53e6ea8966(panel); 292*249a4f5eSChris Morgan const struct d53e6ea8966_panel_info *panel_info = db->panel_info; 293*249a4f5eSChris Morgan struct drm_display_mode *mode; 294*249a4f5eSChris Morgan static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; 295*249a4f5eSChris Morgan unsigned int i; 296*249a4f5eSChris Morgan 297*249a4f5eSChris Morgan for (i = 0; i < panel_info->num_modes; i++) { 298*249a4f5eSChris Morgan mode = drm_mode_duplicate(connector->dev, 299*249a4f5eSChris Morgan &panel_info->display_modes[i]); 300*249a4f5eSChris Morgan if (!mode) 301*249a4f5eSChris Morgan return -ENOMEM; 302*249a4f5eSChris Morgan 303*249a4f5eSChris Morgan drm_mode_set_name(mode); 304*249a4f5eSChris Morgan drm_mode_probed_add(connector, mode); 305*249a4f5eSChris Morgan } 306*249a4f5eSChris Morgan 307*249a4f5eSChris Morgan connector->display_info.bpc = 8; 308*249a4f5eSChris Morgan connector->display_info.width_mm = panel_info->width_mm; 309*249a4f5eSChris Morgan connector->display_info.height_mm = panel_info->height_mm; 310*249a4f5eSChris Morgan connector->display_info.bus_flags = panel_info->bus_flags; 311*249a4f5eSChris Morgan 312*249a4f5eSChris Morgan drm_display_info_set_bus_formats(&connector->display_info, 313*249a4f5eSChris Morgan &bus_format, 1); 314*249a4f5eSChris Morgan 315*249a4f5eSChris Morgan return 1; 316*249a4f5eSChris Morgan } 317*249a4f5eSChris Morgan 318*249a4f5eSChris Morgan static const struct drm_panel_funcs d53e6ea8966_panel_funcs = { 319*249a4f5eSChris Morgan .disable = d53e6ea8966_disable, 320*249a4f5eSChris Morgan .enable = d53e6ea8966_enable, 321*249a4f5eSChris Morgan .get_modes = d53e6ea8966_get_modes, 322*249a4f5eSChris Morgan .prepare = d53e6ea8966_prepare, 323*249a4f5eSChris Morgan .unprepare = d53e6ea8966_unprepare, 324*249a4f5eSChris Morgan }; 325*249a4f5eSChris Morgan 326*249a4f5eSChris Morgan static int ams495qa01_set_brightness(struct backlight_device *bd) 327*249a4f5eSChris Morgan { 328*249a4f5eSChris Morgan struct d53e6ea8966 *db = bl_get_data(bd); 329*249a4f5eSChris Morgan struct mipi_dbi *dbi = &db->dbi; 330*249a4f5eSChris Morgan int brightness = backlight_get_brightness(bd); 331*249a4f5eSChris Morgan 332*249a4f5eSChris Morgan ams495qa01_update_gamma(dbi, brightness); 333*249a4f5eSChris Morgan 334*249a4f5eSChris Morgan return 0; 335*249a4f5eSChris Morgan } 336*249a4f5eSChris Morgan 337*249a4f5eSChris Morgan static const struct backlight_ops ams495qa01_backlight_ops = { 338*249a4f5eSChris Morgan .update_status = ams495qa01_set_brightness, 339*249a4f5eSChris Morgan }; 340*249a4f5eSChris Morgan 341*249a4f5eSChris Morgan static int ams495qa01_backlight_register(struct d53e6ea8966 *db) 342*249a4f5eSChris Morgan { 343*249a4f5eSChris Morgan struct backlight_properties props = { 344*249a4f5eSChris Morgan .type = BACKLIGHT_RAW, 345*249a4f5eSChris Morgan .brightness = MAX_BRIGHTNESS, 346*249a4f5eSChris Morgan .max_brightness = MAX_BRIGHTNESS, 347*249a4f5eSChris Morgan }; 348*249a4f5eSChris Morgan struct device *dev = db->dev; 349*249a4f5eSChris Morgan int ret = 0; 350*249a4f5eSChris Morgan 351*249a4f5eSChris Morgan db->bl_dev = devm_backlight_device_register(dev, "panel", dev, db, 352*249a4f5eSChris Morgan &ams495qa01_backlight_ops, 353*249a4f5eSChris Morgan &props); 354*249a4f5eSChris Morgan if (IS_ERR(db->bl_dev)) { 355*249a4f5eSChris Morgan ret = PTR_ERR(db->bl_dev); 356*249a4f5eSChris Morgan dev_err(dev, "error registering backlight device (%d)\n", ret); 357*249a4f5eSChris Morgan } 358*249a4f5eSChris Morgan 359*249a4f5eSChris Morgan return ret; 360*249a4f5eSChris Morgan } 361*249a4f5eSChris Morgan 362*249a4f5eSChris Morgan static int d53e6ea8966_probe(struct spi_device *spi) 363*249a4f5eSChris Morgan { 364*249a4f5eSChris Morgan struct device *dev = &spi->dev; 365*249a4f5eSChris Morgan struct mipi_dsi_host *dsi_host; 366*249a4f5eSChris Morgan struct d53e6ea8966 *db; 367*249a4f5eSChris Morgan int ret; 368*249a4f5eSChris Morgan struct mipi_dsi_device_info info = { 369*249a4f5eSChris Morgan .type = "d53e6ea8966", 370*249a4f5eSChris Morgan .channel = 0, 371*249a4f5eSChris Morgan .node = NULL, 372*249a4f5eSChris Morgan }; 373*249a4f5eSChris Morgan 374*249a4f5eSChris Morgan db = devm_kzalloc(dev, sizeof(*db), GFP_KERNEL); 375*249a4f5eSChris Morgan if (!db) 376*249a4f5eSChris Morgan return -ENOMEM; 377*249a4f5eSChris Morgan 378*249a4f5eSChris Morgan spi_set_drvdata(spi, db); 379*249a4f5eSChris Morgan 380*249a4f5eSChris Morgan db->dev = dev; 381*249a4f5eSChris Morgan 382*249a4f5eSChris Morgan db->panel_info = of_device_get_match_data(dev); 383*249a4f5eSChris Morgan if (!db->panel_info) 384*249a4f5eSChris Morgan return -EINVAL; 385*249a4f5eSChris Morgan 386*249a4f5eSChris Morgan db->reg_vdd = devm_regulator_get(dev, "vdd"); 387*249a4f5eSChris Morgan if (IS_ERR(db->reg_vdd)) 388*249a4f5eSChris Morgan return dev_err_probe(dev, PTR_ERR(db->reg_vdd), 389*249a4f5eSChris Morgan "Failed to get vdd supply\n"); 390*249a4f5eSChris Morgan 391*249a4f5eSChris Morgan db->reg_elvdd = devm_regulator_get_optional(dev, "elvdd"); 392*249a4f5eSChris Morgan if (IS_ERR(db->reg_elvdd)) 393*249a4f5eSChris Morgan db->reg_elvdd = NULL; 394*249a4f5eSChris Morgan 395*249a4f5eSChris Morgan db->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); 396*249a4f5eSChris Morgan if (IS_ERR(db->reset)) { 397*249a4f5eSChris Morgan ret = PTR_ERR(db->reset); 398*249a4f5eSChris Morgan return dev_err_probe(dev, ret, "no RESET GPIO\n"); 399*249a4f5eSChris Morgan } 400*249a4f5eSChris Morgan 401*249a4f5eSChris Morgan db->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); 402*249a4f5eSChris Morgan if (IS_ERR(db->enable)) { 403*249a4f5eSChris Morgan ret = PTR_ERR(db->enable); 404*249a4f5eSChris Morgan return dev_err_probe(dev, ret, "cannot get ENABLE GPIO\n"); 405*249a4f5eSChris Morgan } 406*249a4f5eSChris Morgan 407*249a4f5eSChris Morgan ret = mipi_dbi_spi_init(spi, &db->dbi, NULL); 408*249a4f5eSChris Morgan if (ret) 409*249a4f5eSChris Morgan return dev_err_probe(dev, ret, "MIPI DBI init failed\n"); 410*249a4f5eSChris Morgan 411*249a4f5eSChris Morgan dsi_host = drm_of_get_dsi_bus(dev); 412*249a4f5eSChris Morgan if (IS_ERR(dsi_host)) { 413*249a4f5eSChris Morgan ret = PTR_ERR(dsi_host); 414*249a4f5eSChris Morgan return dev_err_probe(dev, ret, "Error attaching DSI bus\n"); 415*249a4f5eSChris Morgan } 416*249a4f5eSChris Morgan 417*249a4f5eSChris Morgan db->dsi_dev = devm_mipi_dsi_device_register_full(dev, dsi_host, &info); 418*249a4f5eSChris Morgan if (IS_ERR(db->dsi_dev)) { 419*249a4f5eSChris Morgan dev_err(dev, "failed to register dsi device: %ld\n", 420*249a4f5eSChris Morgan PTR_ERR(db->dsi_dev)); 421*249a4f5eSChris Morgan ret = PTR_ERR(db->dsi_dev); 422*249a4f5eSChris Morgan } 423*249a4f5eSChris Morgan 424*249a4f5eSChris Morgan db->dsi_dev->lanes = 2; 425*249a4f5eSChris Morgan db->dsi_dev->format = MIPI_DSI_FMT_RGB888; 426*249a4f5eSChris Morgan db->dsi_dev->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | 427*249a4f5eSChris Morgan MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; 428*249a4f5eSChris Morgan 429*249a4f5eSChris Morgan drm_panel_init(&db->panel, dev, &d53e6ea8966_panel_funcs, 430*249a4f5eSChris Morgan DRM_MODE_CONNECTOR_DSI); 431*249a4f5eSChris Morgan 432*249a4f5eSChris Morgan if (db->panel_info->backlight_register) { 433*249a4f5eSChris Morgan ret = db->panel_info->backlight_register(db); 434*249a4f5eSChris Morgan if (ret < 0) 435*249a4f5eSChris Morgan return ret; 436*249a4f5eSChris Morgan db->panel.backlight = db->bl_dev; 437*249a4f5eSChris Morgan } 438*249a4f5eSChris Morgan 439*249a4f5eSChris Morgan drm_panel_add(&db->panel); 440*249a4f5eSChris Morgan 441*249a4f5eSChris Morgan ret = devm_mipi_dsi_attach(dev, db->dsi_dev); 442*249a4f5eSChris Morgan if (ret < 0) { 443*249a4f5eSChris Morgan dev_err(dev, "mipi_dsi_attach failed: %d\n", ret); 444*249a4f5eSChris Morgan drm_panel_remove(&db->panel); 445*249a4f5eSChris Morgan return ret; 446*249a4f5eSChris Morgan } 447*249a4f5eSChris Morgan 448*249a4f5eSChris Morgan return 0; 449*249a4f5eSChris Morgan } 450*249a4f5eSChris Morgan 451*249a4f5eSChris Morgan static void d53e6ea8966_remove(struct spi_device *spi) 452*249a4f5eSChris Morgan { 453*249a4f5eSChris Morgan struct d53e6ea8966 *db = spi_get_drvdata(spi); 454*249a4f5eSChris Morgan 455*249a4f5eSChris Morgan drm_panel_remove(&db->panel); 456*249a4f5eSChris Morgan } 457*249a4f5eSChris Morgan 458*249a4f5eSChris Morgan static const struct drm_display_mode ams495qa01_modes[] = { 459*249a4f5eSChris Morgan { /* 60hz */ 460*249a4f5eSChris Morgan .clock = 33500, 461*249a4f5eSChris Morgan .hdisplay = 960, 462*249a4f5eSChris Morgan .hsync_start = 960 + 10, 463*249a4f5eSChris Morgan .hsync_end = 960 + 10 + 2, 464*249a4f5eSChris Morgan .htotal = 960 + 10 + 2 + 10, 465*249a4f5eSChris Morgan .vdisplay = 544, 466*249a4f5eSChris Morgan .vsync_start = 544 + 10, 467*249a4f5eSChris Morgan .vsync_end = 544 + 10 + 2, 468*249a4f5eSChris Morgan .vtotal = 544 + 10 + 2 + 10, 469*249a4f5eSChris Morgan .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, 470*249a4f5eSChris Morgan .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, 471*249a4f5eSChris Morgan }, 472*249a4f5eSChris Morgan { /* 50hz */ 473*249a4f5eSChris Morgan .clock = 27800, 474*249a4f5eSChris Morgan .hdisplay = 960, 475*249a4f5eSChris Morgan .hsync_start = 960 + 10, 476*249a4f5eSChris Morgan .hsync_end = 960 + 10 + 2, 477*249a4f5eSChris Morgan .htotal = 960 + 10 + 2 + 10, 478*249a4f5eSChris Morgan .vdisplay = 544, 479*249a4f5eSChris Morgan .vsync_start = 544 + 10, 480*249a4f5eSChris Morgan .vsync_end = 544 + 10 + 2, 481*249a4f5eSChris Morgan .vtotal = 544 + 10 + 2 + 10, 482*249a4f5eSChris Morgan .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, 483*249a4f5eSChris Morgan .type = DRM_MODE_TYPE_DRIVER, 484*249a4f5eSChris Morgan }, 485*249a4f5eSChris Morgan }; 486*249a4f5eSChris Morgan 487*249a4f5eSChris Morgan static const struct d53e6ea8966_panel_info ams495qa01_info = { 488*249a4f5eSChris Morgan .display_modes = ams495qa01_modes, 489*249a4f5eSChris Morgan .num_modes = ARRAY_SIZE(ams495qa01_modes), 490*249a4f5eSChris Morgan .width_mm = 117, 491*249a4f5eSChris Morgan .height_mm = 74, 492*249a4f5eSChris Morgan .bus_flags = DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE, 493*249a4f5eSChris Morgan .panel_init_seq = ams495qa01_panel_init, 494*249a4f5eSChris Morgan .backlight_register = ams495qa01_backlight_register, 495*249a4f5eSChris Morgan }; 496*249a4f5eSChris Morgan 497*249a4f5eSChris Morgan static const struct of_device_id d53e6ea8966_match[] = { 498*249a4f5eSChris Morgan { .compatible = "samsung,ams495qa01", .data = &ams495qa01_info }, 499*249a4f5eSChris Morgan { /* sentinel */ }, 500*249a4f5eSChris Morgan }; 501*249a4f5eSChris Morgan MODULE_DEVICE_TABLE(of, d53e6ea8966_match); 502*249a4f5eSChris Morgan 503*249a4f5eSChris Morgan static const struct spi_device_id d53e6ea8966_ids[] = { 504*249a4f5eSChris Morgan { "ams495qa01", 0 }, 505*249a4f5eSChris Morgan { /* sentinel */ }, 506*249a4f5eSChris Morgan }; 507*249a4f5eSChris Morgan MODULE_DEVICE_TABLE(spi, d53e6ea8966_ids); 508*249a4f5eSChris Morgan 509*249a4f5eSChris Morgan static struct spi_driver d53e6ea8966_driver = { 510*249a4f5eSChris Morgan .driver = { 511*249a4f5eSChris Morgan .name = "d53e6ea8966-panel", 512*249a4f5eSChris Morgan .of_match_table = d53e6ea8966_match, 513*249a4f5eSChris Morgan }, 514*249a4f5eSChris Morgan .id_table = d53e6ea8966_ids, 515*249a4f5eSChris Morgan .probe = d53e6ea8966_probe, 516*249a4f5eSChris Morgan .remove = d53e6ea8966_remove, 517*249a4f5eSChris Morgan }; 518*249a4f5eSChris Morgan module_spi_driver(d53e6ea8966_driver); 519*249a4f5eSChris Morgan 520*249a4f5eSChris Morgan MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>"); 521*249a4f5eSChris Morgan MODULE_DESCRIPTION("Magnachip d53e6ea8966 panel driver"); 522*249a4f5eSChris Morgan MODULE_LICENSE("GPL"); 523