// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2021, Linaro Limited * * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree: * Copyright (c) 2013, The Linux Foundation. All rights reserved. */ #include #include #include #include #include #include #include #include #include struct truly_nt35521 { struct drm_panel panel; struct mipi_dsi_device *dsi; struct regulator_bulk_data supplies[2]; struct gpio_desc *reset_gpio; struct gpio_desc *blen_gpio; }; #define NT35521_DCS_SWITCH_PAGE 0xf0 #define nt35521_switch_page(dsi_ctx, page) \ mipi_dsi_dcs_write_seq_multi(dsi_ctx, NT35521_DCS_SWITCH_PAGE, \ 0x55, 0xaa, 0x52, 0x08, (page)) static inline struct truly_nt35521 *to_truly_nt35521(struct drm_panel *panel) { return container_of(panel, struct truly_nt35521, panel); } static void truly_nt35521_reset(struct truly_nt35521 *ctx) { gpiod_set_value_cansleep(ctx->reset_gpio, 1); usleep_range(1000, 2000); gpiod_set_value_cansleep(ctx->reset_gpio, 1); usleep_range(10000, 11000); gpiod_set_value_cansleep(ctx->reset_gpio, 0); msleep(150); } static int truly_nt35521_on(struct truly_nt35521 *ctx) { struct mipi_dsi_device *dsi = ctx->dsi; struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; dsi->mode_flags |= MIPI_DSI_MODE_LPM; nt35521_switch_page(&dsi_ctx, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x80); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x20, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x21); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x01, 0xa0, 0x10, 0x08, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x01, 0x02, 0x0c, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x11, 0x11); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x02); nt35521_switch_page(&dsi_ctx, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x09, 0x09); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x09, 0x09); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x8c, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x8c, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x04); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0xb5); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x35, 0x35); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x25, 0x25); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x43, 0x43); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x24, 0x24); nt35521_switch_page(&dsi_ctx, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xee, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00, 0xb2, 0x00, 0xb3, 0x00, 0xb6, 0x00, 0xc3, 0x00, 0xce, 0x00, 0xe1, 0x00, 0xf3, 0x01, 0x11); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x01, 0x2e, 0x01, 0x5c, 0x01, 0x82, 0x01, 0xc3, 0x01, 0xfe, 0x02, 0x00, 0x02, 0x37, 0x02, 0x77); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x02, 0xa1, 0x02, 0xd7, 0x02, 0xfe, 0x03, 0x2c, 0x03, 0x4b, 0x03, 0x63, 0x03, 0x8f, 0x03, 0x90); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x03, 0x96, 0x03, 0x98); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x00, 0x81, 0x00, 0x8b, 0x00, 0x9c, 0x00, 0xa9, 0x00, 0xb5, 0x00, 0xcb, 0x00, 0xdf, 0x01, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x01, 0x1f, 0x01, 0x51, 0x01, 0x7a, 0x01, 0xbf, 0x01, 0xfa, 0x01, 0xfc, 0x02, 0x34, 0x02, 0x76); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x02, 0x9f, 0x02, 0xd7, 0x02, 0xfc, 0x03, 0x2c, 0x03, 0x4a, 0x03, 0x63, 0x03, 0x8f, 0x03, 0xa2); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x03, 0xb8, 0x03, 0xba); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x00, 0x01, 0x00, 0x02, 0x00, 0x0e, 0x00, 0x2a, 0x00, 0x41, 0x00, 0x67, 0x00, 0x87, 0x00, 0xb9); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00, 0xe2, 0x01, 0x22, 0x01, 0x54, 0x01, 0xa3, 0x01, 0xe6, 0x01, 0xe7, 0x02, 0x24, 0x02, 0x67); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x02, 0x93, 0x02, 0xcd, 0x02, 0xf6, 0x03, 0x31, 0x03, 0x6c, 0x03, 0xe9, 0x03, 0xef, 0x03, 0xf4); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x03, 0xf6, 0x03, 0xf7); nt35521_switch_page(&dsi_ctx, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x22, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x22, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x05, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x05, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x05, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x05, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x53, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x53, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x53, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x53, 0x00, 0x60, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x00, 0x34, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x00, 0x00, 0x34, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x00, 0x00, 0x34, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x00, 0x00, 0x34, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x60); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0xc0); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x00); nt35521_switch_page(&dsi_ctx, 0x05); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x17, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x02, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x02, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x03, 0x03, 0x00, 0x03, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x0b); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x09); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0xa6); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x05); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x22); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x03); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x07, 0x20); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x03, 0x20); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x01, 0x60); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x01, 0x60); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x00, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x00, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x00, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x00, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x00, 0x05, 0x01, 0x07, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x10, 0x05, 0x05, 0x03, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x20, 0x00, 0x43, 0x07, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x30, 0x00, 0x43, 0x07, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe8, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe9, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xea, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xeb, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xed, 0x30); nt35521_switch_page(&dsi_ctx, 0x06); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x2d, 0x2e); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x31, 0x34); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x29, 0x2a); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x12, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x18, 0x16); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x08, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x31, 0x08); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x03, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x17, 0x19); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0x11, 0x13); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbf, 0x2a, 0x29); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x34, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x2e, 0x2d); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x2e, 0x2d); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x31, 0x34); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x29, 0x2a); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x17, 0x19); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x11, 0x13); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x03, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x08, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x31, 0x08); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0, 0x00, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x12, 0x10); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x18, 0x16); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x2a, 0x29); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x34, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5, 0x2d, 0x2e); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x31, 0x31); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x47); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x0a); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x02); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x17); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf4, 0x60); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9, 0x46); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf3, 0x01); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00); nt35521_switch_page(&dsi_ctx, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x02, 0x03, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00); nt35521_switch_page(&dsi_ctx, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x6c, 0x21); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00); mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx); mipi_dsi_msleep(&dsi_ctx, 120); mipi_dsi_dcs_set_display_on_multi(&dsi_ctx); usleep_range(1000, 2000); mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x53, 0x24); return dsi_ctx.accum_err; } static int truly_nt35521_off(struct truly_nt35521 *ctx) { struct mipi_dsi_device *dsi = ctx->dsi; struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi }; dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; mipi_dsi_dcs_set_display_off_multi(&dsi_ctx); mipi_dsi_msleep(&dsi_ctx, 50); mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx); mipi_dsi_msleep(&dsi_ctx, 150); return dsi_ctx.accum_err; } static int truly_nt35521_prepare(struct drm_panel *panel) { struct truly_nt35521 *ctx = to_truly_nt35521(panel); struct device *dev = &ctx->dsi->dev; int ret; ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); if (ret < 0) { dev_err(dev, "Failed to enable regulators: %d\n", ret); return ret; } truly_nt35521_reset(ctx); ret = truly_nt35521_on(ctx); if (ret < 0) { dev_err(dev, "Failed to initialize panel: %d\n", ret); gpiod_set_value_cansleep(ctx->reset_gpio, 1); return ret; } return 0; } static int truly_nt35521_unprepare(struct drm_panel *panel) { struct truly_nt35521 *ctx = to_truly_nt35521(panel); struct device *dev = &ctx->dsi->dev; int ret; ret = truly_nt35521_off(ctx); if (ret < 0) dev_err(dev, "Failed to un-initialize panel: %d\n", ret); gpiod_set_value_cansleep(ctx->reset_gpio, 1); regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); return 0; } static int truly_nt35521_enable(struct drm_panel *panel) { struct truly_nt35521 *ctx = to_truly_nt35521(panel); gpiod_set_value_cansleep(ctx->blen_gpio, 1); return 0; } static int truly_nt35521_disable(struct drm_panel *panel) { struct truly_nt35521 *ctx = to_truly_nt35521(panel); gpiod_set_value_cansleep(ctx->blen_gpio, 0); return 0; } static const struct drm_display_mode truly_nt35521_mode = { .clock = (720 + 232 + 20 + 112) * (1280 + 18 + 1 + 18) * 60 / 1000, .hdisplay = 720, .hsync_start = 720 + 232, .hsync_end = 720 + 232 + 20, .htotal = 720 + 232 + 20 + 112, .vdisplay = 1280, .vsync_start = 1280 + 18, .vsync_end = 1280 + 18 + 1, .vtotal = 1280 + 18 + 1 + 18, .width_mm = 65, .height_mm = 116, }; static int truly_nt35521_get_modes(struct drm_panel *panel, struct drm_connector *connector) { struct drm_display_mode *mode; mode = drm_mode_duplicate(connector->dev, &truly_nt35521_mode); if (!mode) return -ENOMEM; drm_mode_set_name(mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; connector->display_info.width_mm = mode->width_mm; connector->display_info.height_mm = mode->height_mm; drm_mode_probed_add(connector, mode); return 1; } static const struct drm_panel_funcs truly_nt35521_panel_funcs = { .prepare = truly_nt35521_prepare, .unprepare = truly_nt35521_unprepare, .enable = truly_nt35521_enable, .disable = truly_nt35521_disable, .get_modes = truly_nt35521_get_modes, }; static int truly_nt35521_bl_update_status(struct backlight_device *bl) { struct mipi_dsi_device *dsi = bl_get_data(bl); u16 brightness = backlight_get_brightness(bl); int ret; ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); if (ret < 0) return ret; return 0; } static int truly_nt35521_bl_get_brightness(struct backlight_device *bl) { struct mipi_dsi_device *dsi = bl_get_data(bl); u16 brightness; int ret; ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness); if (ret < 0) return ret; return brightness & 0xff; } static const struct backlight_ops truly_nt35521_bl_ops = { .update_status = truly_nt35521_bl_update_status, .get_brightness = truly_nt35521_bl_get_brightness, }; static struct backlight_device * truly_nt35521_create_backlight(struct mipi_dsi_device *dsi) { struct device *dev = &dsi->dev; const struct backlight_properties props = { .type = BACKLIGHT_RAW, .brightness = 255, .max_brightness = 255, }; return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, &truly_nt35521_bl_ops, &props); } static int truly_nt35521_probe(struct mipi_dsi_device *dsi) { struct device *dev = &dsi->dev; struct truly_nt35521 *ctx; int ret; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; ctx->supplies[0].supply = "positive5"; ctx->supplies[1].supply = "negative5"; ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), ctx->supplies); if (ret < 0) { dev_err(dev, "Failed to get regulators: %d\n", ret); return ret; } ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(ctx->reset_gpio)) return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "Failed to get reset-gpios\n"); ctx->blen_gpio = devm_gpiod_get(dev, "backlight", GPIOD_OUT_LOW); if (IS_ERR(ctx->blen_gpio)) return dev_err_probe(dev, PTR_ERR(ctx->blen_gpio), "Failed to get backlight-gpios\n"); ctx->dsi = dsi; mipi_dsi_set_drvdata(dsi, ctx); dsi->lanes = 4; dsi->format = MIPI_DSI_FMT_RGB888; dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS; drm_panel_init(&ctx->panel, dev, &truly_nt35521_panel_funcs, DRM_MODE_CONNECTOR_DSI); ctx->panel.backlight = truly_nt35521_create_backlight(dsi); if (IS_ERR(ctx->panel.backlight)) return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), "Failed to create backlight\n"); drm_panel_add(&ctx->panel); ret = mipi_dsi_attach(dsi); if (ret < 0) { dev_err(dev, "Failed to attach to DSI host: %d\n", ret); drm_panel_remove(&ctx->panel); return ret; } return 0; } static void truly_nt35521_remove(struct mipi_dsi_device *dsi) { struct truly_nt35521 *ctx = mipi_dsi_get_drvdata(dsi); int ret; ret = mipi_dsi_detach(dsi); if (ret < 0) dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); drm_panel_remove(&ctx->panel); } static const struct of_device_id truly_nt35521_of_match[] = { { .compatible = "sony,tulip-truly-nt35521" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, truly_nt35521_of_match); static struct mipi_dsi_driver truly_nt35521_driver = { .probe = truly_nt35521_probe, .remove = truly_nt35521_remove, .driver = { .name = "panel-truly-nt35521", .of_match_table = truly_nt35521_of_match, }, }; module_mipi_dsi_driver(truly_nt35521_driver); MODULE_AUTHOR("Shawn Guo "); MODULE_DESCRIPTION("DRM driver for Sony Tulip Truly NT35521 panel"); MODULE_LICENSE("GPL v2");