1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2017-2018, Bootlin
30 	enum ili9881c_op	op;  member
48 	struct drm_panel	panel;  member
58 		.op = ILI9881C_SWITCH_PAGE,	\
66 		.op = ILI9881C_COMMAND,		\
396 	ILI9881C_COMMAND_INSTR(0x6F, 0x33), /* pumping ratio VGH=5x VGL=-3x */
397 	ILI9881C_COMMAND_INSTR(0x8D, 0x1B), /* VGL clamp -10V */
456 static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)  in panel_to_ili9881c()  argument
458 	return container_of(panel, struct ili9881c, panel);  in panel_to_ili9881c()
462  * The panel seems to accept some private DCS commands that map
477 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));  in ili9881c_switch_page()
489 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));  in ili9881c_send_cmd_data()
496 static int ili9881c_prepare(struct drm_panel *panel)  in ili9881c_prepare()  argument
498 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_prepare()
502 	/* Power the panel */  in ili9881c_prepare()
503 	ret = regulator_enable(ctx->power);  in ili9881c_prepare()
509 	gpiod_set_value(ctx->reset, 1);  in ili9881c_prepare()
512 	gpiod_set_value(ctx->reset, 0);  in ili9881c_prepare()
515 	for (i = 0; i < ctx->desc->init_length; i++) {  in ili9881c_prepare()
516 		const struct ili9881c_instr *instr = &ctx->desc->init[i];  in ili9881c_prepare()
518 		if (instr->op == ILI9881C_SWITCH_PAGE)  in ili9881c_prepare()
519 			ret = ili9881c_switch_page(ctx, instr->arg.page);  in ili9881c_prepare()
520 		else if (instr->op == ILI9881C_COMMAND)  in ili9881c_prepare()
521 			ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,  in ili9881c_prepare()
522 						      instr->arg.cmd.data);  in ili9881c_prepare()
532 	ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);  in ili9881c_prepare()
536 	ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);  in ili9881c_prepare()
543 static int ili9881c_enable(struct drm_panel *panel)  in ili9881c_enable()  argument
545 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_enable()
549 	mipi_dsi_dcs_set_display_on(ctx->dsi);  in ili9881c_enable()
554 static int ili9881c_disable(struct drm_panel *panel)  in ili9881c_disable()  argument
556 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_disable()
558 	return mipi_dsi_dcs_set_display_off(ctx->dsi);  in ili9881c_disable()
561 static int ili9881c_unprepare(struct drm_panel *panel)  in ili9881c_unprepare()  argument
563 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_unprepare()
565 	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);  in ili9881c_unprepare()
566 	regulator_disable(ctx->power);  in ili9881c_unprepare()
567 	gpiod_set_value(ctx->reset, 1);  in ili9881c_unprepare()
606 static int ili9881c_get_modes(struct drm_panel *panel,  in ili9881c_get_modes()  argument
609 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_get_modes()
612 	mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);  in ili9881c_get_modes()
614 		dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",  in ili9881c_get_modes()
615 			ctx->desc->mode->hdisplay,  in ili9881c_get_modes()
616 			ctx->desc->mode->vdisplay,  in ili9881c_get_modes()
617 			drm_mode_vrefresh(ctx->desc->mode));  in ili9881c_get_modes()
618 		return -ENOMEM;  in ili9881c_get_modes()
623 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in ili9881c_get_modes()
626 	connector->display_info.width_mm = mode->width_mm;  in ili9881c_get_modes()
627 	connector->display_info.height_mm = mode->height_mm;  in ili9881c_get_modes()
645 	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);  in ili9881c_dsi_probe()
647 		return -ENOMEM;  in ili9881c_dsi_probe()
649 	ctx->dsi = dsi;  in ili9881c_dsi_probe()
650 	ctx->desc = of_device_get_match_data(&dsi->dev);  in ili9881c_dsi_probe()
652 	drm_panel_init(&ctx->panel, &dsi->dev, &ili9881c_funcs,  in ili9881c_dsi_probe()
655 	ctx->power = devm_regulator_get(&dsi->dev, "power");  in ili9881c_dsi_probe()
656 	if (IS_ERR(ctx->power)) {  in ili9881c_dsi_probe()
657 		dev_err(&dsi->dev, "Couldn't get our power regulator\n");  in ili9881c_dsi_probe()
658 		return PTR_ERR(ctx->power);  in ili9881c_dsi_probe()
661 	ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);  in ili9881c_dsi_probe()
662 	if (IS_ERR(ctx->reset)) {  in ili9881c_dsi_probe()
663 		dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");  in ili9881c_dsi_probe()
664 		return PTR_ERR(ctx->reset);  in ili9881c_dsi_probe()
667 	ret = drm_panel_of_backlight(&ctx->panel);  in ili9881c_dsi_probe()
671 	drm_panel_add(&ctx->panel);  in ili9881c_dsi_probe()
673 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE;  in ili9881c_dsi_probe()
674 	dsi->format = MIPI_DSI_FMT_RGB888;  in ili9881c_dsi_probe()
675 	dsi->lanes = 4;  in ili9881c_dsi_probe()
685 	drm_panel_remove(&ctx->panel);  in ili9881c_dsi_remove()
704 	{ .compatible = "feixin,k101-im2byl02", .data = &k101_im2byl02_desc },
713 		.name		= "ili9881c-dsi",
719 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");