1 // SPDX-License-Identifier: GPL-2.0
3  * Elida kd35t133 3.5" MIPI-DSI panel driver
8  * Rockteck jh057n00900 5.5" MIPI-DSI panel driver
14 #include <linux/media-bus-format.h>
26 /* Manufacturer specific Commands send via DSI */
41 	struct drm_panel panel;  member
48 static inline struct kd35t133 *panel_to_kd35t133(struct drm_panel *panel)  in panel_to_kd35t133()  argument
50 	return container_of(panel, struct kd35t133, panel);  in panel_to_kd35t133()
56 	 * Init sequence was supplied by the panel vendor with minimal  in kd35t133_init_sequence()
81 static int kd35t133_unprepare(struct drm_panel *panel)  in kd35t133_unprepare()  argument
83 	struct kd35t133 *ctx = panel_to_kd35t133(panel);  in kd35t133_unprepare()
84 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in kd35t133_unprepare()
92 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in kd35t133_unprepare()
94 	regulator_disable(ctx->iovcc);  in kd35t133_unprepare()
95 	regulator_disable(ctx->vdd);  in kd35t133_unprepare()
100 static int kd35t133_prepare(struct drm_panel *panel)  in kd35t133_prepare()  argument
102 	struct kd35t133 *ctx = panel_to_kd35t133(panel);  in kd35t133_prepare()
103 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);  in kd35t133_prepare()
106 	dev_dbg(ctx->dev, "Resetting the panel\n");  in kd35t133_prepare()
107 	dsi_ctx.accum_err = regulator_enable(ctx->vdd);  in kd35t133_prepare()
109 		dev_err(ctx->dev, "Failed to enable vdd supply: %d\n",  in kd35t133_prepare()
114 	dsi_ctx.accum_err = regulator_enable(ctx->iovcc);  in kd35t133_prepare()
116 		dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n",  in kd35t133_prepare()
123 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in kd35t133_prepare()
125 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in kd35t133_prepare()
134 		dev_dbg(ctx->dev, "Panel init sequence done\n");  in kd35t133_prepare()
145 	regulator_disable(ctx->iovcc);  in kd35t133_prepare()
147 	regulator_disable(ctx->vdd);  in kd35t133_prepare()
165 static int kd35t133_get_modes(struct drm_panel *panel,  in kd35t133_get_modes()  argument
168 	struct kd35t133 *ctx = panel_to_kd35t133(panel);  in kd35t133_get_modes()
171 	mode = drm_mode_duplicate(connector->dev, &default_mode);  in kd35t133_get_modes()
173 		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",  in kd35t133_get_modes()
176 		return -ENOMEM;  in kd35t133_get_modes()
181 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in kd35t133_get_modes()
182 	connector->display_info.width_mm = mode->width_mm;  in kd35t133_get_modes()
183 	connector->display_info.height_mm = mode->height_mm;  in kd35t133_get_modes()
189 static enum drm_panel_orientation kd35t133_get_orientation(struct drm_panel *panel)  in kd35t133_get_orientation()  argument
191 	struct kd35t133 *ctx = panel_to_kd35t133(panel);  in kd35t133_get_orientation()
193 	return ctx->orientation;  in kd35t133_get_orientation()
205 	struct device *dev = &dsi->dev;  in kd35t133_probe()
211 		return -ENOMEM;  in kd35t133_probe()
213 	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in kd35t133_probe()
214 	if (IS_ERR(ctx->reset_gpio)) {  in kd35t133_probe()
216 		return PTR_ERR(ctx->reset_gpio);  in kd35t133_probe()
219 	ctx->vdd = devm_regulator_get(dev, "vdd");  in kd35t133_probe()
220 	if (IS_ERR(ctx->vdd)) {  in kd35t133_probe()
221 		ret = PTR_ERR(ctx->vdd);  in kd35t133_probe()
222 		if (ret != -EPROBE_DEFER)  in kd35t133_probe()
227 	ctx->iovcc = devm_regulator_get(dev, "iovcc");  in kd35t133_probe()
228 	if (IS_ERR(ctx->iovcc)) {  in kd35t133_probe()
229 		ret = PTR_ERR(ctx->iovcc);  in kd35t133_probe()
230 		if (ret != -EPROBE_DEFER)  in kd35t133_probe()
235 	ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);  in kd35t133_probe()
237 		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);  in kd35t133_probe()
243 	ctx->dev = dev;  in kd35t133_probe()
245 	dsi->lanes = 1;  in kd35t133_probe()
246 	dsi->format = MIPI_DSI_FMT_RGB888;  in kd35t133_probe()
247 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |  in kd35t133_probe()
251 	drm_panel_init(&ctx->panel, &dsi->dev, &kd35t133_funcs,  in kd35t133_probe()
254 	ret = drm_panel_of_backlight(&ctx->panel);  in kd35t133_probe()
258 	drm_panel_add(&ctx->panel);  in kd35t133_probe()
263 		drm_panel_remove(&ctx->panel);  in kd35t133_probe()
277 		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);  in kd35t133_remove()
279 	drm_panel_remove(&ctx->panel);  in kd35t133_remove()
290 		.name = "panel-elida-kd35t133",
298 MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
299 MODULE_DESCRIPTION("DRM driver for Elida kd35t133 MIPI DSI panel");