1 // SPDX-License-Identifier: GPL-2.0
3  * Elida kd35t133 5.5" MIPI-DSI panel driver
8  * Rockteck jh057n00900 5.5" MIPI-DSI panel driver
14 #include <linux/media-bus-format.h>
44 	struct regulator *iovcc;  member
63 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in kd35t133_init_sequence()
64 	struct device *dev = ctx->dev;  in kd35t133_init_sequence()
98 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in kd35t133_unprepare()
101 	if (!ctx->prepared)  in kd35t133_unprepare()
106 		dev_err(ctx->dev, "failed to set display off: %d\n", ret);  in kd35t133_unprepare()
110 		dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret);  in kd35t133_unprepare()
114 	regulator_disable(ctx->iovcc);  in kd35t133_unprepare()
115 	regulator_disable(ctx->vdd);  in kd35t133_unprepare()
117 	ctx->prepared = false;  in kd35t133_unprepare()
125 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in kd35t133_prepare()
128 	if (ctx->prepared)  in kd35t133_prepare()
131 	dev_dbg(ctx->dev, "Resetting the panel\n");  in kd35t133_prepare()
132 	ret = regulator_enable(ctx->vdd);  in kd35t133_prepare()
134 		dev_err(ctx->dev, "Failed to enable vdd supply: %d\n", ret);  in kd35t133_prepare()
138 	ret = regulator_enable(ctx->iovcc);  in kd35t133_prepare()
140 		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);  in kd35t133_prepare()
146 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in kd35t133_prepare()
148 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in kd35t133_prepare()
154 		dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);  in kd35t133_prepare()
162 		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);  in kd35t133_prepare()
168 		dev_err(ctx->dev, "Failed to set display on: %d\n", ret);  in kd35t133_prepare()
174 	ctx->prepared = true;  in kd35t133_prepare()
179 	regulator_disable(ctx->iovcc);  in kd35t133_prepare()
181 	regulator_disable(ctx->vdd);  in kd35t133_prepare()
205 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in kd35t133_get_modes()
207 		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",  in kd35t133_get_modes()
210 		return -ENOMEM;  in kd35t133_get_modes()
215 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in kd35t133_get_modes()
216 	connector->display_info.width_mm = mode->width_mm;  in kd35t133_get_modes()
217 	connector->display_info.height_mm = mode->height_mm;  in kd35t133_get_modes()
231 	struct device *dev = &dsi->dev;  in kd35t133_probe()
237 		return -ENOMEM;  in kd35t133_probe()
239 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in kd35t133_probe()
240 	if (IS_ERR(ctx->reset_gpio)) {  in kd35t133_probe()
242 		return PTR_ERR(ctx->reset_gpio);  in kd35t133_probe()
245 	ctx->vdd = devm_regulator_get(dev, "vdd");  in kd35t133_probe()
246 	if (IS_ERR(ctx->vdd)) {  in kd35t133_probe()
247 		ret = PTR_ERR(ctx->vdd);  in kd35t133_probe()
248 		if (ret != -EPROBE_DEFER)  in kd35t133_probe()
253 	ctx->iovcc = devm_regulator_get(dev, "iovcc");  in kd35t133_probe()
254 	if (IS_ERR(ctx->iovcc)) {  in kd35t133_probe()
255 		ret = PTR_ERR(ctx->iovcc);  in kd35t133_probe()
256 		if (ret != -EPROBE_DEFER)  in kd35t133_probe()
257 			dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);  in kd35t133_probe()
263 	ctx->dev = dev;  in kd35t133_probe()
265 	dsi->lanes = 1;  in kd35t133_probe()
266 	dsi->format = MIPI_DSI_FMT_RGB888;  in kd35t133_probe()
267 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |  in kd35t133_probe()
270 	drm_panel_init(&ctx->panel, &dsi->dev, &kd35t133_funcs,  in kd35t133_probe()
273 	ret = drm_panel_of_backlight(&ctx->panel);  in kd35t133_probe()
277 	drm_panel_add(&ctx->panel);  in kd35t133_probe()
282 		drm_panel_remove(&ctx->panel);  in kd35t133_probe()
294 	ret = drm_panel_unprepare(&ctx->panel);  in kd35t133_shutdown()
296 		dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);  in kd35t133_shutdown()
298 	ret = drm_panel_disable(&ctx->panel);  in kd35t133_shutdown()
300 		dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);  in kd35t133_shutdown()
312 		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);  in kd35t133_remove()
314 	drm_panel_remove(&ctx->panel);  in kd35t133_remove()
327 		.name = "panel-elida-kd35t133",
336 MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");