1 // SPDX-License-Identifier: GPL-2.0-only
14  * the code needed to set up and configure the panel will be similar,
16  * per-panel, e.g. for physical size.
21  * I2C or SPI interface for setting up the NT35510. If this is needed
128  * struct nt35510_config - the display-specific NT35510 configuration
154  * +------------------------------------------->
180 	 * @bt1ctr: setting for boost power control for the AVDD step-up
183 	 * frequency for the step-up circuit:
193 	 * amplification for the the step-up circuit:
204 	 * @avee: setting for AVEE ranging from 0x00 = -6.5V to 0x14 = -4.5V
205 	 * in 0.1V steps the default is 0x05 which means -6.0V
209 	 * @bt2ctr: setting for boost power control for the AVEE step-up
214 	 * amplification for the the step-up circuit.
216 	 * 1 = -1.5 x VDDB
217 	 * 2 = -2 x VDDB
218 	 * 3 = -2.5 x VDDB
219 	 * 4 = -3 x VDDB
229 	 * @bt4ctr: setting for boost power control for the VGH step-up
234 	 * amplification for the the step-up circuit.
236 	 * 1 = AVDD - AVEE
237 	 * 2 = AVDD - AVEE + VDDB
238 	 * 3 = AVDD x 2 - AVEE
243 	 * @vgl: setting for VGL ranging from 0x00 = -2V to 0x0f = -15V in
244 	 * 1V steps, the default is 0x08 which means -10V
248 	 * @bt5ctr: setting for boost power control for the VGL step-up
253 	 * amplification for the the step-up circuit.
255 	 * 1 = AVEE - AVDD
256 	 * 2 = AVEE + VCL - AVDD
257 	 * 3 = AVEE x 2 - AVDD
281 	 * and EQS3, setting the rise time for each equalizer step:
313 	 * Byte 1 bit 1 selects gate signal mode: 0 = non-overlap, 1 = overlap
315 	 * 1 = swap all O->E, L->R
349  * struct nt35510 - state container for the NT35510 panel
406 		dev_err(nt->dev, "error sending DCS command seq cmd %02x\n", cmd);  in nt35510_send_long()
413 		chunk = cmdlen - cmdwritten;  in nt35510_send_long()
418 			dev_err(nt->dev, "error sending generic write seq %02x\n", cmd);  in nt35510_send_long()
424 	dev_dbg(nt->dev, "sent command %02x %02x bytes\n", cmd, cmdlen);  in nt35510_send_long()
430 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_read_id()
436 		dev_err(nt->dev, "could not read MTP ID1\n");  in nt35510_read_id()
441 		dev_err(nt->dev, "could not read MTP ID2\n");  in nt35510_read_id()
446 		dev_err(nt->dev, "could not read MTP ID3\n");  in nt35510_read_id()
451 	 * Multi-Time Programmable (?) memory contains manufacturer  in nt35510_read_id()
455 	dev_info(nt->dev, "MTP ID manufacturer: %02x version: %02x driver: %02x\n", id1, id2, id3);  in nt35510_read_id()
461  * nt35510_setup_power() - set up power config in page 1
462  * @nt: the display instance to set up
466 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_setup_power()
471 				nt->conf->avdd);  in nt35510_setup_power()
476 				nt->conf->bt1ctr);  in nt35510_setup_power()
481 				nt->conf->avee);  in nt35510_setup_power()
486 				nt->conf->bt2ctr);  in nt35510_setup_power()
491 				nt->conf->vgh);  in nt35510_setup_power()
496 				nt->conf->bt4ctr);  in nt35510_setup_power()
506 				nt->conf->vgl);  in nt35510_setup_power()
511 				nt->conf->bt5ctr);  in nt35510_setup_power()
516 				nt->conf->vgp);  in nt35510_setup_power()
521 				nt->conf->vgn);  in nt35510_setup_power()
532  * nt35510_setup_display() - set up display config in page 0
533  * @nt: the display instance to set up
537 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_setup_display()
538 	const struct nt35510_config *conf = nt->conf;  in nt35510_setup_display()
542 	/* FIXME: set up any rotation (assume none for now) */  in nt35510_setup_display()
584 				conf->sdeqctr);  in nt35510_setup_display()
589 				 &conf->sdvpctr, 1);  in nt35510_setup_display()
609 	dpfrctr[0] = (conf->t1 >> 8) & 0xFF;  in nt35510_setup_display()
610 	dpfrctr[1] = conf->t1 & 0xFF;  in nt35510_setup_display()
612 	dpfrctr[2] = conf->vbp;  in nt35510_setup_display()
614 	dpfrctr[3] = conf->vfp;  in nt35510_setup_display()
615 	dpfrctr[4] = conf->psel;  in nt35510_setup_display()
622 	dpfrctr[3]--;  in nt35510_setup_display()
642 				conf->dpmctr12);  in nt35510_setup_display()
652 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_set_brightness()
653 	u8 brightness = bl->props.brightness;  in nt35510_set_brightness()
656 	dev_dbg(nt->dev, "set brightness %d\n", brightness);  in nt35510_set_brightness()
671  * This power-on sequence
675 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_power_on()
678 	ret = regulator_bulk_enable(ARRAY_SIZE(nt->supplies), nt->supplies);  in nt35510_power_on()
680 		dev_err(nt->dev, "unable to enable regulators\n");  in nt35510_power_on()
685 	if (nt->reset_gpio) {  in nt35510_power_on()
686 		gpiod_set_value(nt->reset_gpio, 1);  in nt35510_power_on()
689 		gpiod_set_value(nt->reset_gpio, 0);  in nt35510_power_on()
692 		 * according to datasheet, let's use 120-140 ms.  in nt35510_power_on()
713 	/* Set up stuff in  manufacturer control, page 1 */  in nt35510_power_on()
726 				nt->conf->gamma_corr_pos_r);  in nt35510_power_on()
731 				nt->conf->gamma_corr_pos_g);  in nt35510_power_on()
736 				nt->conf->gamma_corr_pos_b);  in nt35510_power_on()
741 				nt->conf->gamma_corr_neg_r);  in nt35510_power_on()
746 				nt->conf->gamma_corr_neg_g);  in nt35510_power_on()
751 				nt->conf->gamma_corr_neg_b);  in nt35510_power_on()
755 	/* Set up stuff in  manufacturer control, page 0 */  in nt35510_power_on()
773 	ret = regulator_bulk_disable(ARRAY_SIZE(nt->supplies), nt->supplies);  in nt35510_power_off()
777 	if (nt->reset_gpio)  in nt35510_power_off()
778 		gpiod_set_value(nt->reset_gpio, 1);  in nt35510_power_off()
786 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_unprepare()
791 		dev_err(nt->dev, "failed to turn display off (%d)\n", ret);  in nt35510_unprepare()
799 		dev_err(nt->dev, "failed to enter sleep mode (%d)\n", ret);  in nt35510_unprepare()
816 	struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);  in nt35510_prepare()
826 		dev_err(nt->dev, "failed to exit sleep mode (%d)\n", ret);  in nt35510_prepare()
829 	/* Up to 120 ms */  in nt35510_prepare()
834 		dev_err(nt->dev, "failed to turn display on (%d)\n", ret);  in nt35510_prepare()
850 	info = &connector->display_info;  in nt35510_get_modes()
851 	info->width_mm = nt->conf->width_mm;  in nt35510_get_modes()
852 	info->height_mm = nt->conf->height_mm;  in nt35510_get_modes()
853 	mode = drm_mode_duplicate(connector->dev, &nt->conf->mode);  in nt35510_get_modes()
855 		dev_err(panel->dev, "bad mode or failed to add mode\n");  in nt35510_get_modes()
856 		return -EINVAL;  in nt35510_get_modes()
859 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;  in nt35510_get_modes()
861 	mode->width_mm = nt->conf->width_mm;  in nt35510_get_modes()
862 	mode->height_mm = nt->conf->height_mm;  in nt35510_get_modes()
876 	struct device *dev = &dsi->dev;  in nt35510_probe()
882 		return -ENOMEM;  in nt35510_probe()
884 	nt->dev = dev;  in nt35510_probe()
886 	dsi->lanes = 2;  in nt35510_probe()
887 	dsi->format = MIPI_DSI_FMT_RGB888;  in nt35510_probe()
893 	 * HVA40WV1 panel and setting up the LP frequency makes the panel  in nt35510_probe()
897 	 * maybe make this a per-panel config in struct nt35510_config?  in nt35510_probe()
899 	dsi->hs_rate = 349440000;  in nt35510_probe()
900 	dsi->lp_rate = 9600000;  in nt35510_probe()
901 	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |  in nt35510_probe()
908 	nt->conf = of_device_get_match_data(dev);  in nt35510_probe()
909 	if (!nt->conf) {  in nt35510_probe()
911 		return -ENODEV;  in nt35510_probe()
914 	nt->supplies[0].supply = "vdd"; /* 2.3-4.8 V */  in nt35510_probe()
915 	nt->supplies[1].supply = "vddi"; /* 1.65-3.3V */  in nt35510_probe()
916 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(nt->supplies),  in nt35510_probe()
917 				      nt->supplies);  in nt35510_probe()
920 	ret = regulator_set_voltage(nt->supplies[0].consumer,  in nt35510_probe()
924 	ret = regulator_set_voltage(nt->supplies[1].consumer,  in nt35510_probe()
929 	nt->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);  in nt35510_probe()
930 	if (IS_ERR(nt->reset_gpio)) {  in nt35510_probe()
932 		return PTR_ERR(nt->reset_gpio);  in nt35510_probe()
935 	drm_panel_init(&nt->panel, dev, &nt35510_drm_funcs,  in nt35510_probe()
943 	ret = drm_panel_of_backlight(&nt->panel);  in nt35510_probe()
948 	if (!nt->panel.backlight) {  in nt35510_probe()
957 		bl->props.max_brightness = 255;  in nt35510_probe()
958 		bl->props.brightness = 255;  in nt35510_probe()
959 		bl->props.power = FB_BLANK_POWERDOWN;  in nt35510_probe()
960 		nt->panel.backlight = bl;  in nt35510_probe()
963 	drm_panel_add(&nt->panel);  in nt35510_probe()
967 		drm_panel_remove(&nt->panel);  in nt35510_probe()
980 	drm_panel_remove(&nt->panel);  in nt35510_remove()
989  * step on the curve. As can be seen these default curves goes from 0x0001
1039 	/* 0x09: AVEE = -5.6V */
1041 	/* 0x24: NCK = Hsync/2, BTN =  -2 x VDDB */
1045 	/* 0x24: NCKA = Hsync/2, VGH = 2 x AVDD - AVEE */
1047 	/* 0x0B = -13V */
1049 	/* 0x24: LCKA = Hsync, VGL = AVDD + VCL - AVDD */
1055 	/* SDEQCTR: source driver EQ mode 2, 2.5 us rise time on each step */
1067 	/* DPTMCTR12: 0x03: LVGL = VGLX, overlap mode, swap R->L O->E */
1091 		.name = "panel-novatek-nt35510",
1098 MODULE_DESCRIPTION("NT35510-based panel driver");