24 	/* the datasheet refers to them as DSI-LINK1 and DSI-LINK2 */
37 static inline struct sharp_panel *to_sharp_panel(struct drm_panel *panel)  in to_sharp_panel()  argument
39 	return container_of(panel, struct sharp_panel, base);  in to_sharp_panel()
44 	unsigned int refresh = drm_mode_vrefresh(sharp->mode);  in sharp_wait_frames()
55 	struct mipi_dsi_device *dsi = sharp->link1;  in sharp_panel_write()  local
58 	err = mipi_dsi_generic_write(dsi, payload, sizeof(payload));  in sharp_panel_write()
60 		dev_err(&dsi->dev, "failed to write %02x to %04x: %zd\n",  in sharp_panel_write()
65 	err = mipi_dsi_dcs_nop(dsi);  in sharp_panel_write()
67 		dev_err(&dsi->dev, "failed to send DCS nop: %zd\n", err);  in sharp_panel_write()
83 	err = mipi_dsi_generic_read(sharp->link1, &offset, sizeof(offset),  in sharp_panel_read()
86 		dev_err(&sharp->link1->dev, "failed to read from %04x: %zd\n",  in sharp_panel_read()
92 static int sharp_panel_disable(struct drm_panel *panel)  in sharp_panel_disable()  argument
94 	struct sharp_panel *sharp = to_sharp_panel(panel);  in sharp_panel_disable()
96 	if (!sharp->enabled)  in sharp_panel_disable()
99 	backlight_disable(sharp->backlight);  in sharp_panel_disable()
101 	sharp->enabled = false;  in sharp_panel_disable()
106 static int sharp_panel_unprepare(struct drm_panel *panel)  in sharp_panel_unprepare()  argument
108 	struct sharp_panel *sharp = to_sharp_panel(panel);  in sharp_panel_unprepare()
111 	if (!sharp->prepared)  in sharp_panel_unprepare()
116 	err = mipi_dsi_dcs_set_display_off(sharp->link1);  in sharp_panel_unprepare()
118 		dev_err(panel->dev, "failed to set display off: %d\n", err);  in sharp_panel_unprepare()
120 	err = mipi_dsi_dcs_enter_sleep_mode(sharp->link1);  in sharp_panel_unprepare()
122 		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);  in sharp_panel_unprepare()
126 	regulator_disable(sharp->supply);  in sharp_panel_unprepare()
128 	sharp->prepared = false;  in sharp_panel_unprepare()
139 	err = mipi_dsi_dcs_set_column_address(left, 0, mode->hdisplay / 2 - 1);  in sharp_setup_symmetrical_split()
141 		dev_err(&left->dev, "failed to set column address: %d\n", err);  in sharp_setup_symmetrical_split()
145 	err = mipi_dsi_dcs_set_page_address(left, 0, mode->vdisplay - 1);  in sharp_setup_symmetrical_split()
147 		dev_err(&left->dev, "failed to set page address: %d\n", err);  in sharp_setup_symmetrical_split()
151 	err = mipi_dsi_dcs_set_column_address(right, mode->hdisplay / 2,  in sharp_setup_symmetrical_split()
152 					      mode->hdisplay - 1);  in sharp_setup_symmetrical_split()
154 		dev_err(&right->dev, "failed to set column address: %d\n", err);  in sharp_setup_symmetrical_split()
158 	err = mipi_dsi_dcs_set_page_address(right, 0, mode->vdisplay - 1);  in sharp_setup_symmetrical_split()
160 		dev_err(&right->dev, "failed to set page address: %d\n", err);  in sharp_setup_symmetrical_split()
167 static int sharp_panel_prepare(struct drm_panel *panel)  in sharp_panel_prepare()  argument
169 	struct sharp_panel *sharp = to_sharp_panel(panel);  in sharp_panel_prepare()
173 	if (sharp->prepared)  in sharp_panel_prepare()
176 	err = regulator_enable(sharp->supply);  in sharp_panel_prepare()
181 	 * According to the datasheet, the panel needs around 10 ms to fully  in sharp_panel_prepare()
183 	 * mode to make sure the panel is ready. Throw in another 20 ms for  in sharp_panel_prepare()
188 	err = mipi_dsi_dcs_exit_sleep_mode(sharp->link1);  in sharp_panel_prepare()
190 		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);  in sharp_panel_prepare()
203 	/* set left-right mode */  in sharp_panel_prepare()
206 		dev_err(panel->dev, "failed to set left-right mode: %d\n", err);  in sharp_panel_prepare()
213 		dev_err(panel->dev, "failed to enable command mode: %d\n", err);  in sharp_panel_prepare()
217 	err = mipi_dsi_dcs_set_pixel_format(sharp->link1, format);  in sharp_panel_prepare()
219 		dev_err(panel->dev, "failed to set pixel format: %d\n", err);  in sharp_panel_prepare()
224 	 * TODO: The device supports both left-right and even-odd split  in sharp_panel_prepare()
225 	 * configurations, but this driver currently supports only the left-  in sharp_panel_prepare()
227 	 * put in place to communicate the configuration back to the DSI host  in sharp_panel_prepare()
230 	err = sharp_setup_symmetrical_split(sharp->link1, sharp->link2,  in sharp_panel_prepare()
231 					    sharp->mode);  in sharp_panel_prepare()
233 		dev_err(panel->dev, "failed to set up symmetrical split: %d\n",  in sharp_panel_prepare()
238 	err = mipi_dsi_dcs_set_display_on(sharp->link1);  in sharp_panel_prepare()
240 		dev_err(panel->dev, "failed to set display on: %d\n", err);  in sharp_panel_prepare()
244 	sharp->prepared = true;  in sharp_panel_prepare()
252 	regulator_disable(sharp->supply);  in sharp_panel_prepare()
256 static int sharp_panel_enable(struct drm_panel *panel)  in sharp_panel_enable()  argument
258 	struct sharp_panel *sharp = to_sharp_panel(panel);  in sharp_panel_enable()
260 	if (sharp->enabled)  in sharp_panel_enable()
263 	backlight_enable(sharp->backlight);  in sharp_panel_enable()
265 	sharp->enabled = true;  in sharp_panel_enable()
283 static int sharp_panel_get_modes(struct drm_panel *panel)  in sharp_panel_get_modes()  argument
287 	mode = drm_mode_duplicate(panel->drm, &default_mode);  in sharp_panel_get_modes()
289 		dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",  in sharp_panel_get_modes()
292 		return -ENOMEM;  in sharp_panel_get_modes()
297 	drm_mode_probed_add(panel->connector, mode);  in sharp_panel_get_modes()
299 	panel->connector->display_info.width_mm = 217;  in sharp_panel_get_modes()
300 	panel->connector->display_info.height_mm = 136;  in sharp_panel_get_modes()
321 	struct device *dev = &sharp->link1->dev;  in sharp_panel_add()
323 	sharp->mode = &default_mode;  in sharp_panel_add()
325 	sharp->supply = devm_regulator_get(&sharp->link1->dev, "power");  in sharp_panel_add()
326 	if (IS_ERR(sharp->supply))  in sharp_panel_add()
327 		return PTR_ERR(sharp->supply);  in sharp_panel_add()
329 	sharp->backlight = devm_of_find_backlight(dev);  in sharp_panel_add()
331 	if (IS_ERR(sharp->backlight))  in sharp_panel_add()
332 		return PTR_ERR(sharp->backlight);  in sharp_panel_add()
334 	drm_panel_init(&sharp->base);  in sharp_panel_add()
335 	sharp->base.funcs = &sharp_panel_funcs;  in sharp_panel_add()
336 	sharp->base.dev = &sharp->link1->dev;  in sharp_panel_add()
338 	return drm_panel_add(&sharp->base);  in sharp_panel_add()
343 	if (sharp->base.dev)  in sharp_panel_del()
344 		drm_panel_remove(&sharp->base);  in sharp_panel_del()
346 	if (sharp->link2)  in sharp_panel_del()
347 		put_device(&sharp->link2->dev);  in sharp_panel_del()
350 static int sharp_panel_probe(struct mipi_dsi_device *dsi)  in sharp_panel_probe()  argument
357 	dsi->lanes = 4;  in sharp_panel_probe()
358 	dsi->format = MIPI_DSI_FMT_RGB888;  in sharp_panel_probe()
359 	dsi->mode_flags = MIPI_DSI_MODE_LPM;  in sharp_panel_probe()
361 	/* Find DSI-LINK1 */  in sharp_panel_probe()
362 	np = of_parse_phandle(dsi->dev.of_node, "link2", 0);  in sharp_panel_probe()
368 			return -EPROBE_DEFER;  in sharp_panel_probe()
371 	/* register a panel for only the DSI-LINK1 interface */  in sharp_panel_probe()
373 		sharp = devm_kzalloc(&dsi->dev, sizeof(*sharp), GFP_KERNEL);  in sharp_panel_probe()
375 			put_device(&secondary->dev);  in sharp_panel_probe()
376 			return -ENOMEM;  in sharp_panel_probe()
379 		mipi_dsi_set_drvdata(dsi, sharp);  in sharp_panel_probe()
381 		sharp->link2 = secondary;  in sharp_panel_probe()
382 		sharp->link1 = dsi;  in sharp_panel_probe()
386 			put_device(&secondary->dev);  in sharp_panel_probe()
391 	err = mipi_dsi_attach(dsi);  in sharp_panel_probe()
402 static int sharp_panel_remove(struct mipi_dsi_device *dsi)  in sharp_panel_remove()  argument
404 	struct sharp_panel *sharp = mipi_dsi_get_drvdata(dsi);  in sharp_panel_remove()
407 	/* only detach from host for the DSI-LINK2 interface */  in sharp_panel_remove()
409 		mipi_dsi_detach(dsi);  in sharp_panel_remove()
413 	err = sharp_panel_disable(&sharp->base);  in sharp_panel_remove()
415 		dev_err(&dsi->dev, "failed to disable panel: %d\n", err);  in sharp_panel_remove()
417 	err = mipi_dsi_detach(dsi);  in sharp_panel_remove()
419 		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);  in sharp_panel_remove()
426 static void sharp_panel_shutdown(struct mipi_dsi_device *dsi)  in sharp_panel_shutdown()  argument
428 	struct sharp_panel *sharp = mipi_dsi_get_drvdata(dsi);  in sharp_panel_shutdown()
430 	/* nothing to do for DSI-LINK2 */  in sharp_panel_shutdown()
434 	sharp_panel_disable(&sharp->base);  in sharp_panel_shutdown()
439 		.name = "panel-sharp-lq101r1sx01",
449 MODULE_DESCRIPTION("Sharp LQ101R1SX01 panel driver");