1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/media-bus-format.h>
37 	struct regulator *iovcc;  member
48 	{ 0x51, 0x85 }, /* VREG2OUT=-5V */
231 	{ 0x85, 0x0D }, /* VGL clamp level (-10V) */
257 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_init_sequence()
316 		dev_err(ctx->dev, "failed to set tear on: %d\n", ret);  in ltk050h3146w_init_sequence()
346 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_a2_select_page()
356 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_a2_write_page()
361 		dev_err(ctx->dev, "failed to select page %d: %d\n", page, ret);  in ltk050h3146w_a2_write_page()
369 			dev_err(ctx->dev, "failed to write page %d init cmds: %d\n", page, ret);  in ltk050h3146w_a2_write_page()
379 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_a2_init_sequence()
403 		dev_err(ctx->dev, "failed to select page 0: %d\n", ret);  in ltk050h3146w_a2_init_sequence()
410 		dev_err(ctx->dev, "failed to set tear on: %d\n", ret);  in ltk050h3146w_a2_init_sequence()
441 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_unprepare()
444 	if (!ctx->prepared)  in ltk050h3146w_unprepare()
449 		dev_err(ctx->dev, "failed to set display off: %d\n", ret);  in ltk050h3146w_unprepare()
455 		dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret);  in ltk050h3146w_unprepare()
459 	regulator_disable(ctx->iovcc);  in ltk050h3146w_unprepare()
460 	regulator_disable(ctx->vci);  in ltk050h3146w_unprepare()
462 	ctx->prepared = false;  in ltk050h3146w_unprepare()
470 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_prepare()
473 	if (ctx->prepared)  in ltk050h3146w_prepare()
476 	dev_dbg(ctx->dev, "Resetting the panel\n");  in ltk050h3146w_prepare()
477 	ret = regulator_enable(ctx->vci);  in ltk050h3146w_prepare()
479 		dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);  in ltk050h3146w_prepare()
482 	ret = regulator_enable(ctx->iovcc);  in ltk050h3146w_prepare()
484 		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);  in ltk050h3146w_prepare()
488 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in ltk050h3146w_prepare()
490 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in ltk050h3146w_prepare()
493 	ret = ctx->panel_desc->init(ctx);  in ltk050h3146w_prepare()
495 		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);  in ltk050h3146w_prepare()
501 		dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);  in ltk050h3146w_prepare()
510 		dev_err(ctx->dev, "Failed to set display on: %d\n", ret);  in ltk050h3146w_prepare()
516 	ctx->prepared = true;  in ltk050h3146w_prepare()
521 	regulator_disable(ctx->iovcc);  in ltk050h3146w_prepare()
523 	regulator_disable(ctx->vci);  in ltk050h3146w_prepare()
533 	mode = drm_mode_duplicate(connector->dev, ctx->panel_desc->mode);  in ltk050h3146w_get_modes()
535 		return -ENOMEM;  in ltk050h3146w_get_modes()
539 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in ltk050h3146w_get_modes()
540 	connector->display_info.width_mm = mode->width_mm;  in ltk050h3146w_get_modes()
541 	connector->display_info.height_mm = mode->height_mm;  in ltk050h3146w_get_modes()
555 	struct device *dev = &dsi->dev;  in ltk050h3146w_probe()
561 		return -ENOMEM;  in ltk050h3146w_probe()
563 	ctx->panel_desc = of_device_get_match_data(dev);  in ltk050h3146w_probe()
564 	if (!ctx->panel_desc)  in ltk050h3146w_probe()
565 		return -EINVAL;  in ltk050h3146w_probe()
567 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ltk050h3146w_probe()
568 	if (IS_ERR(ctx->reset_gpio)) {  in ltk050h3146w_probe()
570 		return PTR_ERR(ctx->reset_gpio);  in ltk050h3146w_probe()
573 	ctx->vci = devm_regulator_get(dev, "vci");  in ltk050h3146w_probe()
574 	if (IS_ERR(ctx->vci)) {  in ltk050h3146w_probe()
575 		ret = PTR_ERR(ctx->vci);  in ltk050h3146w_probe()
576 		if (ret != -EPROBE_DEFER)  in ltk050h3146w_probe()
581 	ctx->iovcc = devm_regulator_get(dev, "iovcc");  in ltk050h3146w_probe()
582 	if (IS_ERR(ctx->iovcc)) {  in ltk050h3146w_probe()
583 		ret = PTR_ERR(ctx->iovcc);  in ltk050h3146w_probe()
584 		if (ret != -EPROBE_DEFER)  in ltk050h3146w_probe()
585 			dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);  in ltk050h3146w_probe()
591 	ctx->dev = dev;  in ltk050h3146w_probe()
593 	dsi->lanes = 4;  in ltk050h3146w_probe()
594 	dsi->format = MIPI_DSI_FMT_RGB888;  in ltk050h3146w_probe()
595 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |  in ltk050h3146w_probe()
598 	drm_panel_init(&ctx->panel, &dsi->dev, &ltk050h3146w_funcs,  in ltk050h3146w_probe()
601 	ret = drm_panel_of_backlight(&ctx->panel);  in ltk050h3146w_probe()
605 	drm_panel_add(&ctx->panel);  in ltk050h3146w_probe()
610 		drm_panel_remove(&ctx->panel);  in ltk050h3146w_probe()
622 	ret = drm_panel_unprepare(&ctx->panel);  in ltk050h3146w_shutdown()
624 		dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);  in ltk050h3146w_shutdown()
626 	ret = drm_panel_disable(&ctx->panel);  in ltk050h3146w_shutdown()
628 		dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);  in ltk050h3146w_shutdown()
640 		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);  in ltk050h3146w_remove()
642 	drm_panel_remove(&ctx->panel);  in ltk050h3146w_remove()
653 		.compatible = "leadtek,ltk050h3146w-a2",
662 		.name = "panel-leadtek-ltk050h3146w",
671 MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");