1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2017-2018, Bootlin
29 	enum ili9881c_op	op;  member
49 	struct drm_panel	panel;  member
62 		.op = ILI9881C_SWITCH_PAGE,	\
70 		.op = ILI9881C_COMMAND,		\
400 	ILI9881C_COMMAND_INSTR(0x6F, 0x33), /* pumping ratio VGH=5x VGL=-3x */
401 	ILI9881C_COMMAND_INSTR(0x8D, 0x1B), /* VGL clamp -10V */
1226 static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)  in panel_to_ili9881c()  argument
1228 	return container_of(panel, struct ili9881c, panel);  in panel_to_ili9881c()
1232  * The panel seems to accept some private DCS commands that map
1247 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));  in ili9881c_switch_page()
1259 	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf));  in ili9881c_send_cmd_data()
1266 static int ili9881c_prepare(struct drm_panel *panel)  in ili9881c_prepare()  argument
1268 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_prepare()
1272 	/* Power the panel */  in ili9881c_prepare()
1273 	ret = regulator_enable(ctx->power);  in ili9881c_prepare()
1279 	gpiod_set_value_cansleep(ctx->reset, 1);  in ili9881c_prepare()
1282 	gpiod_set_value_cansleep(ctx->reset, 0);  in ili9881c_prepare()
1285 	for (i = 0; i < ctx->desc->init_length; i++) {  in ili9881c_prepare()
1286 		const struct ili9881c_instr *instr = &ctx->desc->init[i];  in ili9881c_prepare()
1288 		if (instr->op == ILI9881C_SWITCH_PAGE)  in ili9881c_prepare()
1289 			ret = ili9881c_switch_page(ctx, instr->arg.page);  in ili9881c_prepare()
1290 		else if (instr->op == ILI9881C_COMMAND)  in ili9881c_prepare()
1291 			ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd,  in ili9881c_prepare()
1292 						      instr->arg.cmd.data);  in ili9881c_prepare()
1302 	if (ctx->address_mode) {  in ili9881c_prepare()
1303 		ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_ADDRESS_MODE,  in ili9881c_prepare()
1304 					 &ctx->address_mode,  in ili9881c_prepare()
1305 					 sizeof(ctx->address_mode));  in ili9881c_prepare()
1310 	ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);  in ili9881c_prepare()
1314 	ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);  in ili9881c_prepare()
1321 static int ili9881c_enable(struct drm_panel *panel)  in ili9881c_enable()  argument
1323 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_enable()
1327 	mipi_dsi_dcs_set_display_on(ctx->dsi);  in ili9881c_enable()
1332 static int ili9881c_disable(struct drm_panel *panel)  in ili9881c_disable()  argument
1334 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_disable()
1336 	return mipi_dsi_dcs_set_display_off(ctx->dsi);  in ili9881c_disable()
1339 static int ili9881c_unprepare(struct drm_panel *panel)  in ili9881c_unprepare()  argument
1341 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_unprepare()
1343 	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);  in ili9881c_unprepare()
1344 	regulator_disable(ctx->power);  in ili9881c_unprepare()
1345 	gpiod_set_value_cansleep(ctx->reset, 1);  in ili9881c_unprepare()
1452 static int ili9881c_get_modes(struct drm_panel *panel,  in ili9881c_get_modes()  argument
1455 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_get_modes()
1458 	mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);  in ili9881c_get_modes()
1460 		dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",  in ili9881c_get_modes()
1461 			ctx->desc->mode->hdisplay,  in ili9881c_get_modes()
1462 			ctx->desc->mode->vdisplay,  in ili9881c_get_modes()
1463 			drm_mode_vrefresh(ctx->desc->mode));  in ili9881c_get_modes()
1464 		return -ENOMEM;  in ili9881c_get_modes()
1469 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in ili9881c_get_modes()
1472 	connector->display_info.width_mm = mode->width_mm;  in ili9881c_get_modes()
1473 	connector->display_info.height_mm = mode->height_mm;  in ili9881c_get_modes()
1474 	if (ctx->address_mode == 0x3)  in ili9881c_get_modes()
1475 		connector->display_info.subpixel_order = SubPixelHorizontalBGR;  in ili9881c_get_modes()
1477 		connector->display_info.subpixel_order = SubPixelHorizontalRGB;  in ili9881c_get_modes()
1483 	drm_connector_set_panel_orientation(connector, ctx->orientation);  in ili9881c_get_modes()
1488 static enum drm_panel_orientation ili9881c_get_orientation(struct drm_panel *panel)  in ili9881c_get_orientation()  argument
1490 	struct ili9881c *ctx = panel_to_ili9881c(panel);  in ili9881c_get_orientation()
1492 	return ctx->orientation;  in ili9881c_get_orientation()
1509 	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);  in ili9881c_dsi_probe()
1511 		return -ENOMEM;  in ili9881c_dsi_probe()
1513 	ctx->dsi = dsi;  in ili9881c_dsi_probe()
1514 	ctx->desc = of_device_get_match_data(&dsi->dev);  in ili9881c_dsi_probe()
1516 	drm_panel_init(&ctx->panel, &dsi->dev, &ili9881c_funcs,  in ili9881c_dsi_probe()
1519 	ctx->power = devm_regulator_get(&dsi->dev, "power");  in ili9881c_dsi_probe()
1520 	if (IS_ERR(ctx->power))  in ili9881c_dsi_probe()
1521 		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->power),  in ili9881c_dsi_probe()
1524 	ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_LOW);  in ili9881c_dsi_probe()
1525 	if (IS_ERR(ctx->reset))  in ili9881c_dsi_probe()
1526 		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),  in ili9881c_dsi_probe()
1529 	ret = of_drm_get_panel_orientation(dsi->dev.of_node, &ctx->orientation);  in ili9881c_dsi_probe()
1531 		dev_err(&dsi->dev, "%pOF: failed to get orientation: %d\n",  in ili9881c_dsi_probe()
1532 			dsi->dev.of_node, ret);  in ili9881c_dsi_probe()
1536 	ctx->address_mode = ctx->desc->default_address_mode;  in ili9881c_dsi_probe()
1537 	if (ctx->orientation == DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP) {  in ili9881c_dsi_probe()
1538 		ctx->address_mode ^= 0x03;  in ili9881c_dsi_probe()
1539 		ctx->orientation = DRM_MODE_PANEL_ORIENTATION_NORMAL;  in ili9881c_dsi_probe()
1542 	ctx->panel.prepare_prev_first = true;  in ili9881c_dsi_probe()
1544 	ret = drm_panel_of_backlight(&ctx->panel);  in ili9881c_dsi_probe()
1548 	drm_panel_add(&ctx->panel);  in ili9881c_dsi_probe()
1550 	dsi->mode_flags = ctx->desc->mode_flags;  in ili9881c_dsi_probe()
1551 	dsi->format = MIPI_DSI_FMT_RGB888;  in ili9881c_dsi_probe()
1552 	dsi->lanes = 4;  in ili9881c_dsi_probe()
1562 	drm_panel_remove(&ctx->panel);  in ili9881c_dsi_remove()
1614 	{ .compatible = "feixin,k101-im2byl02", .data = &k101_im2byl02_desc },
1627 		.name		= "ili9881c-dsi",
1633 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");