1 // SPDX-License-Identifier: GPL-2.0-only
21 	struct drm_panel panel;  member
22 	struct mipi_dsi_device *dsi;  member
34 static inline struct novatek_nt37801 *to_novatek_nt37801(struct drm_panel *panel)  in to_novatek_nt37801()  argument
36 	return container_of(panel, struct novatek_nt37801, panel);  in to_novatek_nt37801()
41 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in novatek_nt37801_reset()
43 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in novatek_nt37801_reset()
45 	gpiod_set_value_cansleep(ctx->reset_gpio, 0);  in novatek_nt37801_reset()
57 	struct mipi_dsi_device *dsi = ctx->dsi;  in novatek_nt37801_on()  local
58 	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };  in novatek_nt37801_on()
60 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in novatek_nt37801_on()
114 	struct mipi_dsi_device *dsi = ctx->dsi;  in novatek_nt37801_off()  local
115 	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };  in novatek_nt37801_off()
117 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in novatek_nt37801_off()
128 static int novatek_nt37801_prepare(struct drm_panel *panel)  in novatek_nt37801_prepare()  argument
130 	struct novatek_nt37801 *ctx = to_novatek_nt37801(panel);  in novatek_nt37801_prepare()
131 	struct device *dev = &ctx->dsi->dev;  in novatek_nt37801_prepare()
136 				    ctx->supplies);  in novatek_nt37801_prepare()
146 	drm_dsc_pps_payload_pack(&pps, &ctx->dsc);  in novatek_nt37801_prepare()
148 	ret = mipi_dsi_picture_parameter_set(ctx->dsi, &pps);  in novatek_nt37801_prepare()
150 		dev_err(panel->dev, "failed to transmit PPS: %d\n", ret);  in novatek_nt37801_prepare()
154 	ret = mipi_dsi_compression_mode(ctx->dsi, true);  in novatek_nt37801_prepare()
165 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in novatek_nt37801_prepare()
167 			       ctx->supplies);  in novatek_nt37801_prepare()
172 static int novatek_nt37801_unprepare(struct drm_panel *panel)  in novatek_nt37801_unprepare()  argument
174 	struct novatek_nt37801 *ctx = to_novatek_nt37801(panel);  in novatek_nt37801_unprepare()
175 	struct device *dev = &ctx->dsi->dev;  in novatek_nt37801_unprepare()
180 		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);  in novatek_nt37801_unprepare()
182 	gpiod_set_value_cansleep(ctx->reset_gpio, 1);  in novatek_nt37801_unprepare()
185 			       ctx->supplies);  in novatek_nt37801_unprepare()
203 static int novatek_nt37801_get_modes(struct drm_panel *panel,  in novatek_nt37801_get_modes()  argument
218 	struct mipi_dsi_device *dsi = bl_get_data(bl);  in novatek_nt37801_bl_update_status()  local
222 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;  in novatek_nt37801_bl_update_status()
224 	ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);  in novatek_nt37801_bl_update_status()
228 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;  in novatek_nt37801_bl_update_status()
238 novatek_nt37801_create_backlight(struct mipi_dsi_device *dsi)  in novatek_nt37801_create_backlight()  argument
240 	struct device *dev = &dsi->dev;  in novatek_nt37801_create_backlight()
247 	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,  in novatek_nt37801_create_backlight()
251 static int novatek_nt37801_probe(struct mipi_dsi_device *dsi)  in novatek_nt37801_probe()  argument
253 	struct device *dev = &dsi->dev;  in novatek_nt37801_probe()
257 	ctx = devm_drm_panel_alloc(dev, struct novatek_nt37801, panel,  in novatek_nt37801_probe()
266 					    &ctx->supplies);  in novatek_nt37801_probe()
270 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in novatek_nt37801_probe()
271 	if (IS_ERR(ctx->reset_gpio))  in novatek_nt37801_probe()
272 		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),  in novatek_nt37801_probe()
273 				     "Failed to get reset-gpios\n");  in novatek_nt37801_probe()
275 	ctx->dsi = dsi;  in novatek_nt37801_probe()
276 	mipi_dsi_set_drvdata(dsi, ctx);  in novatek_nt37801_probe()
278 	dsi->lanes = 4;  in novatek_nt37801_probe()
279 	dsi->format = MIPI_DSI_FMT_RGB888;  in novatek_nt37801_probe()
280 	dsi->mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_CLOCK_NON_CONTINUOUS;  in novatek_nt37801_probe()
282 	ctx->panel.prepare_prev_first = true;  in novatek_nt37801_probe()
283 	ctx->panel.backlight = novatek_nt37801_create_backlight(dsi);  in novatek_nt37801_probe()
284 	if (IS_ERR(ctx->panel.backlight))  in novatek_nt37801_probe()
285 		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),  in novatek_nt37801_probe()
288 	drm_panel_add(&ctx->panel);  in novatek_nt37801_probe()
290 	/* This panel only supports DSC; unconditionally enable it */  in novatek_nt37801_probe()
291 	dsi->dsc = &ctx->dsc;  in novatek_nt37801_probe()
292 	ctx->dsc.dsc_version_major = 1;  in novatek_nt37801_probe()
293 	ctx->dsc.dsc_version_minor = 1;  in novatek_nt37801_probe()
294 	ctx->dsc.slice_height = 40;  in novatek_nt37801_probe()
295 	ctx->dsc.slice_width = 720;  in novatek_nt37801_probe()
296 	ctx->dsc.slice_count = 1440 / ctx->dsc.slice_width;  in novatek_nt37801_probe()
297 	ctx->dsc.bits_per_component = 8;  in novatek_nt37801_probe()
298 	ctx->dsc.bits_per_pixel = 8 << 4; /* 4 fractional bits */  in novatek_nt37801_probe()
299 	ctx->dsc.block_pred_enable = true;  in novatek_nt37801_probe()
301 	ret = mipi_dsi_attach(dsi);  in novatek_nt37801_probe()
303 		drm_panel_remove(&ctx->panel);  in novatek_nt37801_probe()
304 		return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");  in novatek_nt37801_probe()
310 static void novatek_nt37801_remove(struct mipi_dsi_device *dsi)  in novatek_nt37801_remove()  argument
312 	struct novatek_nt37801 *ctx = mipi_dsi_get_drvdata(dsi);  in novatek_nt37801_remove()
315 	ret = mipi_dsi_detach(dsi);  in novatek_nt37801_remove()
317 		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);  in novatek_nt37801_remove()
319 	drm_panel_remove(&ctx->panel);  in novatek_nt37801_remove()
332 		.name = "panel-novatek-nt37801",
339 MODULE_DESCRIPTION("Panel driver for the Novatek NT37801/NT37810 AMOLED DSI panel");