forked from mirrors/linux
		
	drm/panel: Add driver for the Toppoly TD028TTEC1 panel
This panel is used on the OpenMoko Neo FreeRunner and Neo 1973. The code is based on the omapdrm-specific panel-tpo-td028ttec1 driver. v2: - fix checkpatch warnings: o (lcd == NULL) => (!lcd) (sam) o (1 << X) => BIT(X) (sam) Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-9-laurent.pinchart@ideasonboard.com
This commit is contained in:
		
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						commit
						415b8dd087
					
				
					 4 changed files with 413 additions and 5 deletions
				
			
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			@ -324,6 +324,14 @@ config DRM_PANEL_SONY_ACX565AKM
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	  Say Y here if you want to enable support for the Sony ACX565AKM
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	  800x600 3.5" panel (found on the Nokia N900).
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config DRM_PANEL_TPO_TD028TTEC1
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	tristate "Toppoly (TPO) TD028TTEC1 panel driver"
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	depends on OF && SPI
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	depends on BACKLIGHT_CLASS_DEVICE
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	help
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	  Say Y here if you want to enable support for TPO TD028TTEC1 480x640
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	  2.8" panel (found on the OpenMoko Neo FreeRunner and Neo 1973).
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config DRM_PANEL_TPO_TPG110
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	tristate "TPO TPG 800x400 panel"
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	depends on OF && SPI && GPIOLIB
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			@ -34,5 +34,6 @@ obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o
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obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
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obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
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obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
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obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
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obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
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obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o
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			@ -31,10 +31,10 @@
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#define CTRL_DISP_BRIGHTNESS_CTRL_ON		(1 << 5)
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#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON		(1 << 4)
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#define CTRL_DISP_BACKLIGHT_ON			(1 << 2)
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#define CTRL_DISP_AUTO_BRIGHTNESS_ON		(1 << 1)
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#define CTRL_DISP_BRIGHTNESS_CTRL_ON		BIT(5)
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#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON		BIT(4)
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#define CTRL_DISP_BACKLIGHT_ON			BIT(2)
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#define CTRL_DISP_AUTO_BRIGHTNESS_ON		BIT(1)
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#define MIPID_CMD_WRITE_CABC		0x55
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#define MIPID_CMD_READ_CABC		0x56
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			@ -621,7 +621,7 @@ static int acx565akm_probe(struct spi_device *spi)
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	int ret;
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	lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
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	if (lcd == NULL)
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	if (!lcd)
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		return -ENOMEM;
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	spi_set_drvdata(spi, lcd);
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										399
									
								
								drivers/gpu/drm/panel/panel-tpo-td028ttec1.c
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										399
									
								
								drivers/gpu/drm/panel/panel-tpo-td028ttec1.c
									
									
									
									
									
										Normal file
									
								
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			@ -0,0 +1,399 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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 * Toppoly TD028TTEC1 Panel Driver
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 *
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 * Copyright (C) 2019 Texas Instruments Incorporated
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 *
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 * Based on the omapdrm-specific panel-tpo-td028ttec1 driver
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 *
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 * Copyright (C) 2008 Nokia Corporation
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 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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 *
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 * Neo 1973 code (jbt6k74.c):
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 * Copyright (C) 2006-2007 OpenMoko, Inc.
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 * Author: Harald Welte <laforge@openmoko.org>
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 *
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 * Ported and adapted from Neo 1973 U-Boot by:
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 * H. Nikolaus Schaller <hns@goldelico.com>
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 */
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <drm/drm_connector.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#define JBT_COMMAND			0x000
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#define JBT_DATA			0x100
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#define JBT_REG_SLEEP_IN		0x10
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#define JBT_REG_SLEEP_OUT		0x11
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#define JBT_REG_DISPLAY_OFF		0x28
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#define JBT_REG_DISPLAY_ON		0x29
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#define JBT_REG_RGB_FORMAT		0x3a
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#define JBT_REG_QUAD_RATE		0x3b
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#define JBT_REG_POWER_ON_OFF		0xb0
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#define JBT_REG_BOOSTER_OP		0xb1
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#define JBT_REG_BOOSTER_MODE		0xb2
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#define JBT_REG_BOOSTER_FREQ		0xb3
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#define JBT_REG_OPAMP_SYSCLK		0xb4
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#define JBT_REG_VSC_VOLTAGE		0xb5
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#define JBT_REG_VCOM_VOLTAGE		0xb6
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#define JBT_REG_EXT_DISPL		0xb7
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#define JBT_REG_OUTPUT_CONTROL		0xb8
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#define JBT_REG_DCCLK_DCEV		0xb9
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#define JBT_REG_DISPLAY_MODE1		0xba
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#define JBT_REG_DISPLAY_MODE2		0xbb
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#define JBT_REG_DISPLAY_MODE		0xbc
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#define JBT_REG_ASW_SLEW		0xbd
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#define JBT_REG_DUMMY_DISPLAY		0xbe
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#define JBT_REG_DRIVE_SYSTEM		0xbf
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#define JBT_REG_SLEEP_OUT_FR_A		0xc0
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#define JBT_REG_SLEEP_OUT_FR_B		0xc1
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#define JBT_REG_SLEEP_OUT_FR_C		0xc2
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#define JBT_REG_SLEEP_IN_LCCNT_D	0xc3
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#define JBT_REG_SLEEP_IN_LCCNT_E	0xc4
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#define JBT_REG_SLEEP_IN_LCCNT_F	0xc5
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#define JBT_REG_SLEEP_IN_LCCNT_G	0xc6
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#define JBT_REG_GAMMA1_FINE_1		0xc7
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#define JBT_REG_GAMMA1_FINE_2		0xc8
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#define JBT_REG_GAMMA1_INCLINATION	0xc9
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#define JBT_REG_GAMMA1_BLUE_OFFSET	0xca
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#define JBT_REG_BLANK_CONTROL		0xcf
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#define JBT_REG_BLANK_TH_TV		0xd0
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#define JBT_REG_CKV_ON_OFF		0xd1
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#define JBT_REG_CKV_1_2			0xd2
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#define JBT_REG_OEV_TIMING		0xd3
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#define JBT_REG_ASW_TIMING_1		0xd4
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#define JBT_REG_ASW_TIMING_2		0xd5
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#define JBT_REG_HCLOCK_VGA		0xec
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#define JBT_REG_HCLOCK_QVGA		0xed
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struct td028ttec1_panel {
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	struct drm_panel panel;
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	struct spi_device *spi;
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	struct backlight_device *backlight;
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};
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#define to_td028ttec1_device(p) container_of(p, struct td028ttec1_panel, panel)
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static int jbt_ret_write_0(struct td028ttec1_panel *lcd, u8 reg, int *err)
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{
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	struct spi_device *spi = lcd->spi;
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	u16 tx_buf = JBT_COMMAND | reg;
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	int ret;
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	if (err && *err)
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		return *err;
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	ret = spi_write(spi, (u8 *)&tx_buf, sizeof(tx_buf));
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	if (ret < 0) {
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		dev_err(&spi->dev, "%s: SPI write failed: %d\n", __func__, ret);
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		if (err)
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			*err = ret;
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	}
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	return ret;
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}
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static int jbt_reg_write_1(struct td028ttec1_panel *lcd,
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			   u8 reg, u8 data, int *err)
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{
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	struct spi_device *spi = lcd->spi;
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	u16 tx_buf[2];
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	int ret;
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	if (err && *err)
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		return *err;
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	tx_buf[0] = JBT_COMMAND | reg;
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	tx_buf[1] = JBT_DATA | data;
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	ret = spi_write(spi, (u8 *)tx_buf, sizeof(tx_buf));
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	if (ret < 0) {
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		dev_err(&spi->dev, "%s: SPI write failed: %d\n", __func__, ret);
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		if (err)
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			*err = ret;
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	}
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	return ret;
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}
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static int jbt_reg_write_2(struct td028ttec1_panel *lcd,
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			   u8 reg, u16 data, int *err)
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{
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	struct spi_device *spi = lcd->spi;
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	u16 tx_buf[3];
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	int ret;
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	if (err && *err)
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		return *err;
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	tx_buf[0] = JBT_COMMAND | reg;
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	tx_buf[1] = JBT_DATA | (data >> 8);
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	tx_buf[2] = JBT_DATA | (data & 0xff);
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	ret = spi_write(spi, (u8 *)tx_buf, sizeof(tx_buf));
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	if (ret < 0) {
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		dev_err(&spi->dev, "%s: SPI write failed: %d\n", __func__, ret);
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		if (err)
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			*err = ret;
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	}
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	return ret;
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}
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static int td028ttec1_prepare(struct drm_panel *panel)
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{
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	struct td028ttec1_panel *lcd = to_td028ttec1_device(panel);
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	unsigned int i;
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	int ret = 0;
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	/* Three times command zero */
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	for (i = 0; i < 3; ++i) {
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		jbt_ret_write_0(lcd, 0x00, &ret);
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		usleep_range(1000, 2000);
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	}
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	/* deep standby out */
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	jbt_reg_write_1(lcd, JBT_REG_POWER_ON_OFF, 0x17, &ret);
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	/* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
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	jbt_reg_write_1(lcd, JBT_REG_DISPLAY_MODE, 0x80, &ret);
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	/* Quad mode off */
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	jbt_reg_write_1(lcd, JBT_REG_QUAD_RATE, 0x00, &ret);
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	/* AVDD on, XVDD on */
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	jbt_reg_write_1(lcd, JBT_REG_POWER_ON_OFF, 0x16, &ret);
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	/* Output control */
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	jbt_reg_write_2(lcd, JBT_REG_OUTPUT_CONTROL, 0xfff9, &ret);
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	/* Sleep mode off */
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	jbt_ret_write_0(lcd, JBT_REG_SLEEP_OUT, &ret);
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	/* at this point we have like 50% grey */
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	/* initialize register set */
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	jbt_reg_write_1(lcd, JBT_REG_DISPLAY_MODE1, 0x01, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_DISPLAY_MODE2, 0x00, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_RGB_FORMAT, 0x60, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_DRIVE_SYSTEM, 0x10, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_BOOSTER_OP, 0x56, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_BOOSTER_MODE, 0x33, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_BOOSTER_FREQ, 0x11, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_BOOSTER_FREQ, 0x11, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_OPAMP_SYSCLK, 0x02, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_VSC_VOLTAGE, 0x2b, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_VCOM_VOLTAGE, 0x40, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_EXT_DISPL, 0x03, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_DCCLK_DCEV, 0x04, &ret);
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	/*
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	 * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
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	 * to avoid red / blue flicker
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	 */
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	jbt_reg_write_1(lcd, JBT_REG_ASW_SLEW, 0x04, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_DUMMY_DISPLAY, 0x00, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_SLEEP_OUT_FR_A, 0x11, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_SLEEP_OUT_FR_B, 0x11, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_SLEEP_OUT_FR_C, 0x11, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_GAMMA1_FINE_1, 0x5533, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_GAMMA1_FINE_2, 0x00, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_GAMMA1_INCLINATION, 0x00, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_HCLOCK_VGA, 0x1f0, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_BLANK_CONTROL, 0x02, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_BLANK_TH_TV, 0x0804, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_CKV_ON_OFF, 0x01, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_CKV_1_2, 0x0000, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_OEV_TIMING, 0x0d0e, &ret);
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	jbt_reg_write_2(lcd, JBT_REG_ASW_TIMING_1, 0x11a4, &ret);
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	jbt_reg_write_1(lcd, JBT_REG_ASW_TIMING_2, 0x0e, &ret);
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	return ret;
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}
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static int td028ttec1_enable(struct drm_panel *panel)
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{
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	struct td028ttec1_panel *lcd = to_td028ttec1_device(panel);
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	int ret;
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 | 
			
		||||
	ret = jbt_ret_write_0(lcd, JBT_REG_DISPLAY_ON, NULL);
 | 
			
		||||
	if (ret)
 | 
			
		||||
		return ret;
 | 
			
		||||
 | 
			
		||||
	backlight_enable(lcd->backlight);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int td028ttec1_disable(struct drm_panel *panel)
 | 
			
		||||
{
 | 
			
		||||
	struct td028ttec1_panel *lcd = to_td028ttec1_device(panel);
 | 
			
		||||
 | 
			
		||||
	backlight_disable(lcd->backlight);
 | 
			
		||||
 | 
			
		||||
	jbt_ret_write_0(lcd, JBT_REG_DISPLAY_OFF, NULL);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int td028ttec1_unprepare(struct drm_panel *panel)
 | 
			
		||||
{
 | 
			
		||||
	struct td028ttec1_panel *lcd = to_td028ttec1_device(panel);
 | 
			
		||||
 | 
			
		||||
	jbt_reg_write_2(lcd, JBT_REG_OUTPUT_CONTROL, 0x8002, NULL);
 | 
			
		||||
	jbt_ret_write_0(lcd, JBT_REG_SLEEP_IN, NULL);
 | 
			
		||||
	jbt_reg_write_1(lcd, JBT_REG_POWER_ON_OFF, 0x00, NULL);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static const struct drm_display_mode td028ttec1_mode = {
 | 
			
		||||
	.clock = 22153,
 | 
			
		||||
	.hdisplay = 480,
 | 
			
		||||
	.hsync_start = 480 + 24,
 | 
			
		||||
	.hsync_end = 480 + 24 + 8,
 | 
			
		||||
	.htotal = 480 + 24 + 8 + 8,
 | 
			
		||||
	.vdisplay = 640,
 | 
			
		||||
	.vsync_start = 640 + 4,
 | 
			
		||||
	.vsync_end = 640 + 4 + 2,
 | 
			
		||||
	.vtotal = 640 + 4 + 2 + 2,
 | 
			
		||||
	.vrefresh = 66,
 | 
			
		||||
	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
 | 
			
		||||
	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 | 
			
		||||
	.width_mm = 43,
 | 
			
		||||
	.height_mm = 58,
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
static int td028ttec1_get_modes(struct drm_panel *panel)
 | 
			
		||||
{
 | 
			
		||||
	struct drm_connector *connector = panel->connector;
 | 
			
		||||
	struct drm_display_mode *mode;
 | 
			
		||||
 | 
			
		||||
	mode = drm_mode_duplicate(panel->drm, &td028ttec1_mode);
 | 
			
		||||
	if (!mode)
 | 
			
		||||
		return -ENOMEM;
 | 
			
		||||
 | 
			
		||||
	drm_mode_set_name(mode);
 | 
			
		||||
	drm_mode_probed_add(connector, mode);
 | 
			
		||||
 | 
			
		||||
	connector->display_info.width_mm = td028ttec1_mode.width_mm;
 | 
			
		||||
	connector->display_info.height_mm = td028ttec1_mode.height_mm;
 | 
			
		||||
	/*
 | 
			
		||||
	 * FIXME: According to the datasheet sync signals are sampled on the
 | 
			
		||||
	 * rising edge of the clock, but the code running on the OpenMoko Neo
 | 
			
		||||
	 * FreeRunner and Neo 1973 indicates sampling on the falling edge. This
 | 
			
		||||
	 * should be tested on a real device.
 | 
			
		||||
	 */
 | 
			
		||||
	connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH
 | 
			
		||||
					  | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
 | 
			
		||||
					  | DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
 | 
			
		||||
 | 
			
		||||
	return 1;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static const struct drm_panel_funcs td028ttec1_funcs = {
 | 
			
		||||
	.prepare = td028ttec1_prepare,
 | 
			
		||||
	.enable = td028ttec1_enable,
 | 
			
		||||
	.disable = td028ttec1_disable,
 | 
			
		||||
	.unprepare = td028ttec1_unprepare,
 | 
			
		||||
	.get_modes = td028ttec1_get_modes,
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
static int td028ttec1_probe(struct spi_device *spi)
 | 
			
		||||
{
 | 
			
		||||
	struct td028ttec1_panel *lcd;
 | 
			
		||||
	int ret;
 | 
			
		||||
 | 
			
		||||
	lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
 | 
			
		||||
	if (lcd == NULL)
 | 
			
		||||
		return -ENOMEM;
 | 
			
		||||
 | 
			
		||||
	spi_set_drvdata(spi, lcd);
 | 
			
		||||
	lcd->spi = spi;
 | 
			
		||||
 | 
			
		||||
	lcd->backlight = devm_of_find_backlight(&spi->dev);
 | 
			
		||||
	if (IS_ERR(lcd->backlight))
 | 
			
		||||
		return PTR_ERR(lcd->backlight);
 | 
			
		||||
 | 
			
		||||
	spi->mode = SPI_MODE_3;
 | 
			
		||||
	spi->bits_per_word = 9;
 | 
			
		||||
 | 
			
		||||
	ret = spi_setup(spi);
 | 
			
		||||
	if (ret < 0) {
 | 
			
		||||
		dev_err(&spi->dev, "failed to setup SPI: %d\n", ret);
 | 
			
		||||
		return ret;
 | 
			
		||||
	}
 | 
			
		||||
 | 
			
		||||
	drm_panel_init(&lcd->panel);
 | 
			
		||||
	lcd->panel.dev = &lcd->spi->dev;
 | 
			
		||||
	lcd->panel.funcs = &td028ttec1_funcs;
 | 
			
		||||
 | 
			
		||||
	return drm_panel_add(&lcd->panel);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int td028ttec1_remove(struct spi_device *spi)
 | 
			
		||||
{
 | 
			
		||||
	struct td028ttec1_panel *lcd = spi_get_drvdata(spi);
 | 
			
		||||
 | 
			
		||||
	drm_panel_remove(&lcd->panel);
 | 
			
		||||
	drm_panel_disable(&lcd->panel);
 | 
			
		||||
	drm_panel_unprepare(&lcd->panel);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static const struct of_device_id td028ttec1_of_match[] = {
 | 
			
		||||
	{ .compatible = "tpo,td028ttec1", },
 | 
			
		||||
	/* DT backward compatibility. */
 | 
			
		||||
	{ .compatible = "toppoly,td028ttec1", },
 | 
			
		||||
	{ /* sentinel */ },
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
 | 
			
		||||
 | 
			
		||||
static const struct spi_device_id td028ttec1_ids[] = {
 | 
			
		||||
	{ "tpo,td028ttec1", 0},
 | 
			
		||||
	{ "toppoly,td028ttec1", 0 },
 | 
			
		||||
	{ /* sentinel */ }
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
MODULE_DEVICE_TABLE(spi, td028ttec1_ids);
 | 
			
		||||
 | 
			
		||||
static struct spi_driver td028ttec1_driver = {
 | 
			
		||||
	.probe		= td028ttec1_probe,
 | 
			
		||||
	.remove		= td028ttec1_remove,
 | 
			
		||||
	.id_table	= td028ttec1_ids,
 | 
			
		||||
	.driver		= {
 | 
			
		||||
		.name   = "panel-tpo-td028ttec1",
 | 
			
		||||
		.of_match_table = td028ttec1_of_match,
 | 
			
		||||
	},
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
module_spi_driver(td028ttec1_driver);
 | 
			
		||||
 | 
			
		||||
MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 | 
			
		||||
MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
 | 
			
		||||
MODULE_LICENSE("GPL");
 | 
			
		||||
		Loading…
	
		Reference in a new issue