1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/media-bus-format.h>
34 	struct drm_panel panel;  member
47 	{ 0x51, 0x85 }, /* VREG2OUT=-5V */
230 	{ 0x85, 0x0D }, /* VGL clamp level (-10V) */
234 	{ 0xB5, 0x07 }, /* GAMMA OP */
235 	{ 0x31, 0x45 }, /* SOURCE OP */
241 struct ltk050h3146w *panel_to_ltk050h3146w(struct drm_panel *panel)  in panel_to_ltk050h3146w()  argument
243 	return container_of(panel, struct ltk050h3146w, panel);  in panel_to_ltk050h3146w()
249 	 * Init sequence was supplied by the panel vendor without much  in ltk050h3148w_init_sequence()
323 	 * Init sequence was supplied by the panel vendor without much  in ltk050h3146w_init_sequence()
422 	 * Init sequence was supplied by the panel vendor without much  in ltk050h3146w_a2_init_sequence()
460 static int ltk050h3146w_unprepare(struct drm_panel *panel)  in ltk050h3146w_unprepare()  argument
462 	struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);  in ltk050h3146w_unprepare()
463 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_unprepare()
471 	regulator_disable(ctx->iovcc);  in ltk050h3146w_unprepare()
472 	regulator_disable(ctx->vci);  in ltk050h3146w_unprepare()
477 static int ltk050h3146w_prepare(struct drm_panel *panel)  in ltk050h3146w_prepare()  argument
479 	struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);  in ltk050h3146w_prepare()
480 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in ltk050h3146w_prepare()
483 	dev_dbg(ctx->dev, "Resetting the panel\n");  in ltk050h3146w_prepare()
484 	dsi_ctx.accum_err = regulator_enable(ctx->vci);  in ltk050h3146w_prepare()
486 		dev_err(ctx->dev, "Failed to enable vci supply: %d\n", dsi_ctx.accum_err);  in ltk050h3146w_prepare()
489 	dsi_ctx.accum_err = regulator_enable(ctx->iovcc);  in ltk050h3146w_prepare()
491 		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", dsi_ctx.accum_err);  in ltk050h3146w_prepare()
495 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in ltk050h3146w_prepare()
497 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in ltk050h3146w_prepare()
500 	ctx->panel_desc->init(&dsi_ctx);  in ltk050h3146w_prepare()
513 	regulator_disable(ctx->iovcc);  in ltk050h3146w_prepare()
515 	regulator_disable(ctx->vci);  in ltk050h3146w_prepare()
519 static int ltk050h3146w_get_modes(struct drm_panel *panel,  in ltk050h3146w_get_modes()  argument
522 	struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);  in ltk050h3146w_get_modes()
525 	mode = drm_mode_duplicate(connector->dev, ctx->panel_desc->mode);  in ltk050h3146w_get_modes()
527 		return -ENOMEM;  in ltk050h3146w_get_modes()
531 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in ltk050h3146w_get_modes()
532 	connector->display_info.width_mm = mode->width_mm;  in ltk050h3146w_get_modes()
533 	connector->display_info.height_mm = mode->height_mm;  in ltk050h3146w_get_modes()
547 	struct device *dev = &dsi->dev;  in ltk050h3146w_probe()
553 		return -ENOMEM;  in ltk050h3146w_probe()
555 	ctx->panel_desc = of_device_get_match_data(dev);  in ltk050h3146w_probe()
556 	if (!ctx->panel_desc)  in ltk050h3146w_probe()
557 		return -EINVAL;  in ltk050h3146w_probe()
559 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ltk050h3146w_probe()
560 	if (IS_ERR(ctx->reset_gpio))  in ltk050h3146w_probe()
561 		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "cannot get reset gpio\n");  in ltk050h3146w_probe()
563 	ctx->vci = devm_regulator_get(dev, "vci");  in ltk050h3146w_probe()
564 	if (IS_ERR(ctx->vci))  in ltk050h3146w_probe()
565 		return dev_err_probe(dev, PTR_ERR(ctx->vci), "Failed to request vci regulator\n");  in ltk050h3146w_probe()
567 	ctx->iovcc = devm_regulator_get(dev, "iovcc");  in ltk050h3146w_probe()
568 	if (IS_ERR(ctx->iovcc))  in ltk050h3146w_probe()
569 		return dev_err_probe(dev, PTR_ERR(ctx->iovcc),  in ltk050h3146w_probe()
574 	ctx->dev = dev;  in ltk050h3146w_probe()
576 	dsi->lanes = 4;  in ltk050h3146w_probe()
577 	dsi->format = MIPI_DSI_FMT_RGB888;  in ltk050h3146w_probe()
578 	dsi->mode_flags = ctx->panel_desc->mode_flags;  in ltk050h3146w_probe()
580 	drm_panel_init(&ctx->panel, &dsi->dev, &ltk050h3146w_funcs,  in ltk050h3146w_probe()
583 	ret = drm_panel_of_backlight(&ctx->panel);  in ltk050h3146w_probe()
587 	drm_panel_add(&ctx->panel);  in ltk050h3146w_probe()
592 		drm_panel_remove(&ctx->panel);  in ltk050h3146w_probe()
606 		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);  in ltk050h3146w_remove()
608 	drm_panel_remove(&ctx->panel);  in ltk050h3146w_remove()
617 		.compatible = "leadtek,ltk050h3146w-a2",
630 		.name = "panel-leadtek-ltk050h3146w",
638 MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
639 MODULE_DESCRIPTION("DRM driver for Leadtek LTK050H3146W MIPI DSI panel");