drm/panel: Add driver for the Toppoly TD043MTEA1 panel
This panel is used on the OMAP3 Pandora.
The code is based on the omapdrm-specific panel-tpo-td043mtea1 driver.
v2:
- fix checkpatch warnings
o (lcd == NULL) => (!lcd) (sam)
o alignment to open '(' (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/20190813201101.30980-10-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart
Sam Ravnborg
parent
415b8dd087
commit
dc2e1e5b27
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@ -332,6 +332,13 @@ config DRM_PANEL_TPO_TD028TTEC1
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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_TD043MTEA1
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tristate "Toppoly (TPO) TD043MTEA1 panel driver"
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depends on GPIOLIB && OF && REGULATOR && SPI
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help
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Say Y here if you want to enable support for TPO TD043MTEA1 800x480
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4.3" panel (found on the OMAP3 Pandora board).
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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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@ -35,5 +35,6 @@ 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-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
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obj-$(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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@ -328,7 +328,7 @@ static int td028ttec1_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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@ -0,0 +1,509 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Toppoly TD043MTEA1 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-td043mtea1 driver
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*
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* Author: Gražvydas Ignotas <notasas@gmail.com>
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/regulator/consumer.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 TPO_R02_MODE(x) ((x) & 7)
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#define TPO_R02_MODE_800x480 7
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#define TPO_R02_NCLK_RISING BIT(3)
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#define TPO_R02_HSYNC_HIGH BIT(4)
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#define TPO_R02_VSYNC_HIGH BIT(5)
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#define TPO_R03_NSTANDBY BIT(0)
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#define TPO_R03_EN_CP_CLK BIT(1)
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#define TPO_R03_EN_VGL_PUMP BIT(2)
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#define TPO_R03_EN_PWM BIT(3)
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#define TPO_R03_DRIVING_CAP_100 BIT(4)
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#define TPO_R03_EN_PRE_CHARGE BIT(6)
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#define TPO_R03_SOFTWARE_CTL BIT(7)
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#define TPO_R04_NFLIP_H BIT(0)
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#define TPO_R04_NFLIP_V BIT(1)
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#define TPO_R04_CP_CLK_FREQ_1H BIT(2)
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#define TPO_R04_VGL_FREQ_1H BIT(4)
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#define TPO_R03_VAL_NORMAL \
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(TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | TPO_R03_EN_VGL_PUMP | \
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TPO_R03_EN_PWM | TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
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TPO_R03_SOFTWARE_CTL)
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#define TPO_R03_VAL_STANDBY \
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(TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
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TPO_R03_SOFTWARE_CTL)
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static const u16 td043mtea1_def_gamma[12] = {
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105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023
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};
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struct td043mtea1_panel {
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struct drm_panel panel;
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struct spi_device *spi;
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struct regulator *vcc_reg;
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struct gpio_desc *reset_gpio;
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unsigned int mode;
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u16 gamma[12];
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bool vmirror;
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bool powered_on;
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bool spi_suspended;
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bool power_on_resume;
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};
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#define to_td043mtea1_device(p) container_of(p, struct td043mtea1_panel, panel)
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/* -----------------------------------------------------------------------------
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* Hardware Access
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*/
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static int td043mtea1_write(struct td043mtea1_panel *lcd, u8 addr, u8 value)
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{
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struct spi_message msg;
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struct spi_transfer xfer;
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u16 data;
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int ret;
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spi_message_init(&msg);
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memset(&xfer, 0, sizeof(xfer));
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data = ((u16)addr << 10) | (1 << 8) | value;
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xfer.tx_buf = &data;
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xfer.bits_per_word = 16;
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xfer.len = 2;
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(lcd->spi, &msg);
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if (ret < 0)
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dev_warn(&lcd->spi->dev, "failed to write to LCD reg (%d)\n",
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ret);
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return ret;
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}
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static void td043mtea1_write_gamma(struct td043mtea1_panel *lcd)
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{
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const u16 *gamma = lcd->gamma;
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unsigned int i;
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u8 val;
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/* gamma bits [9:8] */
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for (val = i = 0; i < 4; i++)
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val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
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td043mtea1_write(lcd, 0x11, val);
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for (val = i = 0; i < 4; i++)
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val |= (gamma[i + 4] & 0x300) >> ((i + 1) * 2);
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td043mtea1_write(lcd, 0x12, val);
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for (val = i = 0; i < 4; i++)
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val |= (gamma[i + 8] & 0x300) >> ((i + 1) * 2);
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td043mtea1_write(lcd, 0x13, val);
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/* gamma bits [7:0] */
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for (val = i = 0; i < 12; i++)
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td043mtea1_write(lcd, 0x14 + i, gamma[i] & 0xff);
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}
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static int td043mtea1_write_mirror(struct td043mtea1_panel *lcd)
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{
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u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V |
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TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
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if (lcd->vmirror)
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reg4 &= ~TPO_R04_NFLIP_V;
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return td043mtea1_write(lcd, 4, reg4);
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}
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static int td043mtea1_power_on(struct td043mtea1_panel *lcd)
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{
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int ret;
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if (lcd->powered_on)
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return 0;
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ret = regulator_enable(lcd->vcc_reg);
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if (ret < 0)
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return ret;
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/* Wait for the panel to stabilize. */
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msleep(160);
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gpiod_set_value(lcd->reset_gpio, 0);
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td043mtea1_write(lcd, 2, TPO_R02_MODE(lcd->mode) | TPO_R02_NCLK_RISING);
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td043mtea1_write(lcd, 3, TPO_R03_VAL_NORMAL);
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td043mtea1_write(lcd, 0x20, 0xf0);
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td043mtea1_write(lcd, 0x21, 0xf0);
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td043mtea1_write_mirror(lcd);
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td043mtea1_write_gamma(lcd);
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lcd->powered_on = true;
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return 0;
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}
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static void td043mtea1_power_off(struct td043mtea1_panel *lcd)
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{
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if (!lcd->powered_on)
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return;
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td043mtea1_write(lcd, 3, TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
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gpiod_set_value(lcd->reset_gpio, 1);
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/* wait for at least 2 vsyncs before cutting off power */
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msleep(50);
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td043mtea1_write(lcd, 3, TPO_R03_VAL_STANDBY);
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regulator_disable(lcd->vcc_reg);
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lcd->powered_on = false;
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}
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/* -----------------------------------------------------------------------------
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* sysfs
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*/
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static ssize_t vmirror_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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return snprintf(buf, PAGE_SIZE, "%d\n", lcd->vmirror);
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}
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static ssize_t vmirror_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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int val;
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int ret;
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ret = kstrtoint(buf, 0, &val);
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if (ret < 0)
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return ret;
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lcd->vmirror = !!val;
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ret = td043mtea1_write_mirror(lcd);
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if (ret < 0)
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return ret;
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return count;
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}
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static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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return snprintf(buf, PAGE_SIZE, "%d\n", lcd->mode);
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}
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static ssize_t mode_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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long val;
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int ret;
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ret = kstrtol(buf, 0, &val);
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if (ret != 0 || val & ~7)
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return -EINVAL;
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lcd->mode = val;
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val |= TPO_R02_NCLK_RISING;
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td043mtea1_write(lcd, 2, val);
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return count;
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}
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static ssize_t gamma_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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ssize_t len = 0;
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unsigned int i;
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int ret;
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for (i = 0; i < ARRAY_SIZE(lcd->gamma); i++) {
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ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
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lcd->gamma[i]);
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if (ret < 0)
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return ret;
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len += ret;
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}
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buf[len - 1] = '\n';
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return len;
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}
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static ssize_t gamma_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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unsigned int g[12];
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unsigned int i;
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int ret;
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ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
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&g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
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&g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
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if (ret != 12)
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return -EINVAL;
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for (i = 0; i < 12; i++)
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lcd->gamma[i] = g[i];
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td043mtea1_write_gamma(lcd);
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return count;
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}
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static DEVICE_ATTR_RW(vmirror);
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static DEVICE_ATTR_RW(mode);
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static DEVICE_ATTR_RW(gamma);
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static struct attribute *td043mtea1_attrs[] = {
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&dev_attr_vmirror.attr,
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&dev_attr_mode.attr,
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&dev_attr_gamma.attr,
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NULL,
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};
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static const struct attribute_group td043mtea1_attr_group = {
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.attrs = td043mtea1_attrs,
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};
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/* -----------------------------------------------------------------------------
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* Panel Operations
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*/
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static int td043mtea1_unprepare(struct drm_panel *panel)
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{
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struct td043mtea1_panel *lcd = to_td043mtea1_device(panel);
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if (!lcd->spi_suspended)
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td043mtea1_power_off(lcd);
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return 0;
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}
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static int td043mtea1_prepare(struct drm_panel *panel)
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{
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struct td043mtea1_panel *lcd = to_td043mtea1_device(panel);
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int ret;
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/*
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* If we are resuming from system suspend, SPI might not be enabled
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* yet, so we'll program the LCD from SPI PM resume callback.
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*/
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if (lcd->spi_suspended)
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return 0;
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ret = td043mtea1_power_on(lcd);
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if (ret) {
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dev_err(&lcd->spi->dev, "%s: power on failed (%d)\n",
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__func__, ret);
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return ret;
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}
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return 0;
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}
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static const struct drm_display_mode td043mtea1_mode = {
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.clock = 36000,
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.hdisplay = 800,
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.hsync_start = 800 + 68,
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.hsync_end = 800 + 68 + 1,
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.htotal = 800 + 68 + 1 + 214,
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.vdisplay = 480,
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.vsync_start = 480 + 39,
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.vsync_end = 480 + 39 + 1,
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.vtotal = 480 + 39 + 1 + 34,
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.vrefresh = 60,
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.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
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.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
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.width_mm = 94,
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.height_mm = 56,
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};
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static int td043mtea1_get_modes(struct drm_panel *panel)
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{
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struct drm_connector *connector = panel->connector;
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(panel->drm, &td043mtea1_mode);
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if (!mode)
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return -ENOMEM;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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connector->display_info.width_mm = td043mtea1_mode.width_mm;
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connector->display_info.height_mm = td043mtea1_mode.height_mm;
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/*
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* FIXME: According to the datasheet sync signals are sampled on the
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* rising edge of the clock, but the code running on the OMAP3 Pandora
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* indicates sampling on the falling edge. This should be tested on a
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* real device.
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*/
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connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH
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| DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
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| DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
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return 1;
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}
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static const struct drm_panel_funcs td043mtea1_funcs = {
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.unprepare = td043mtea1_unprepare,
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.prepare = td043mtea1_prepare,
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.get_modes = td043mtea1_get_modes,
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};
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/* -----------------------------------------------------------------------------
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* Power Management, Probe and Remove
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*/
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static int __maybe_unused td043mtea1_suspend(struct device *dev)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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if (lcd->powered_on) {
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td043mtea1_power_off(lcd);
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lcd->powered_on = true;
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}
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lcd->spi_suspended = true;
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return 0;
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}
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static int __maybe_unused td043mtea1_resume(struct device *dev)
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{
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struct td043mtea1_panel *lcd = dev_get_drvdata(dev);
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int ret;
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lcd->spi_suspended = false;
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if (lcd->powered_on) {
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lcd->powered_on = false;
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ret = td043mtea1_power_on(lcd);
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if (ret)
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return ret;
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}
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||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(td043mtea1_pm_ops, td043mtea1_suspend,
|
||||
td043mtea1_resume);
|
||||
|
||||
static int td043mtea1_probe(struct spi_device *spi)
|
||||
{
|
||||
struct td043mtea1_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->mode = TPO_R02_MODE_800x480;
|
||||
memcpy(lcd->gamma, td043mtea1_def_gamma, sizeof(lcd->gamma));
|
||||
|
||||
lcd->vcc_reg = devm_regulator_get(&spi->dev, "vcc");
|
||||
if (IS_ERR(lcd->vcc_reg)) {
|
||||
dev_err(&spi->dev, "failed to get VCC regulator\n");
|
||||
return PTR_ERR(lcd->vcc_reg);
|
||||
}
|
||||
|
||||
lcd->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(lcd->reset_gpio)) {
|
||||
dev_err(&spi->dev, "failed to get reset GPIO\n");
|
||||
return PTR_ERR(lcd->reset_gpio);
|
||||
}
|
||||
|
||||
spi->bits_per_word = 16;
|
||||
spi->mode = SPI_MODE_0;
|
||||
|
||||
ret = spi_setup(spi);
|
||||
if (ret < 0) {
|
||||
dev_err(&spi->dev, "failed to setup SPI: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = sysfs_create_group(&spi->dev.kobj, &td043mtea1_attr_group);
|
||||
if (ret < 0) {
|
||||
dev_err(&spi->dev, "failed to create sysfs files\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
drm_panel_init(&lcd->panel);
|
||||
lcd->panel.dev = &lcd->spi->dev;
|
||||
lcd->panel.funcs = &td043mtea1_funcs;
|
||||
|
||||
ret = drm_panel_add(&lcd->panel);
|
||||
if (ret < 0) {
|
||||
sysfs_remove_group(&spi->dev.kobj, &td043mtea1_attr_group);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int td043mtea1_remove(struct spi_device *spi)
|
||||
{
|
||||
struct td043mtea1_panel *lcd = spi_get_drvdata(spi);
|
||||
|
||||
drm_panel_remove(&lcd->panel);
|
||||
drm_panel_disable(&lcd->panel);
|
||||
drm_panel_unprepare(&lcd->panel);
|
||||
|
||||
sysfs_remove_group(&spi->dev.kobj, &td043mtea1_attr_group);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id td043mtea1_of_match[] = {
|
||||
{ .compatible = "tpo,td043mtea1", },
|
||||
{ /* sentinel */ },
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(of, td043mtea1_of_match);
|
||||
|
||||
static struct spi_driver td043mtea1_driver = {
|
||||
.probe = td043mtea1_probe,
|
||||
.remove = td043mtea1_remove,
|
||||
.driver = {
|
||||
.name = "panel-tpo-td043mtea1",
|
||||
.pm = &td043mtea1_pm_ops,
|
||||
.of_match_table = td043mtea1_of_match,
|
||||
},
|
||||
};
|
||||
|
||||
module_spi_driver(td043mtea1_driver);
|
||||
|
||||
MODULE_ALIAS("spi:tpo,td043mtea1");
|
||||
MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
|
||||
MODULE_DESCRIPTION("TPO TD043MTEA1 Panel Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue