This driver is for the Ilitek ILI9341 based YX240QV29-T 2.4" 240x320 TFT LCD panel from Adafruit.
Signed-off-by: Paul Cercueil paul@crapouillou.net --- drivers/gpu/drm/panel/Kconfig | 9 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-ilitek-ili9341.c | 347 +++++++++++++++++++ 3 files changed, 357 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9341.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index a1723c1b5fbf..2eb2ca77cab2 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -95,6 +95,15 @@ config DRM_PANEL_ILITEK_IL9322 Say Y here if you want to enable support for Ilitek IL9322 QVGA (320x240) RGB, YUV and ITU-T BT.656 panels.
+config DRM_PANEL_ILITEK_IL9341 + tristate "Ilitek ILI9341 320x240 QVGA panels" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for Ilitek IL9341 + QVGA (320x240) RGB, YUV and ITU-T BT.656 panels. + config DRM_PANEL_ILITEK_ILI9881C tristate "Ilitek ILI9881C-based panels" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 96a883cd6630..d1235431691a 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o +obj-$(CONFIG_DRM_PANEL_ILITEK_IL9341) += panel-ilitek-ili9341.o obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9341.c b/drivers/gpu/drm/panel/panel-ilitek-ili9341.c new file mode 100644 index 000000000000..6fb253b49f8a --- /dev/null +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9341.c @@ -0,0 +1,347 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for Ilitek ILI9341 panels + * + * Copyright 2018 David Lechner david@lechnology.com + * Copyright 2020 Paul Cercueil paul@crapouillou.net + * + * Based on mi0283qt.c: + * Copyright 2016 Noralf Trønnes + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/dma-buf.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of_graph.h> +#include <linux/property.h> +#include <drm/drm_atomic_helper.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <video/mipi_display.h> + +#define ILI9341_FRMCTR1 0xb1 +#define ILI9341_DISCTRL 0xb6 +#define ILI9341_ETMOD 0xb7 + +#define ILI9341_PWCTRL1 0xc0 +#define ILI9341_PWCTRL2 0xc1 +#define ILI9341_VMCTRL1 0xc5 +#define ILI9341_VMCTRL2 0xc7 +#define ILI9341_PWCTRLA 0xcb +#define ILI9341_PWCTRLB 0xcf + +#define ILI9341_PGAMCTRL 0xe0 +#define ILI9341_NGAMCTRL 0xe1 +#define ILI9341_DTCTRLA 0xe8 +#define ILI9341_DTCTRLB 0xea +#define ILI9341_PWRSEQ 0xed + +#define ILI9341_EN3GAM 0xf2 +#define ILI9341_PUMPCTRL 0xf7 + +#define ILI9341_MADCTL_BGR BIT(3) +#define ILI9341_MADCTL_MV BIT(5) +#define ILI9341_MADCTL_MX BIT(6) +#define ILI9341_MADCTL_MY BIT(7) + +struct ili9341_pdata { + struct drm_display_mode mode; + unsigned int width_mm; + unsigned int height_mm; + unsigned int bus_type; + unsigned int lanes; +}; + +struct ili9341 { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + const struct ili9341_pdata *pdata; + + struct gpio_desc *reset_gpiod; + struct backlight_device *backlight; + u32 rotation; +}; + +#define mipi_dcs_command(dsi, cmd, seq...) \ +({ \ + u8 d[] = { seq }; \ + mipi_dsi_dcs_write(dsi, cmd, d, ARRAY_SIZE(d)); \ +}) + +static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel) +{ + return container_of(panel, struct ili9341, panel); +} + +static int ili9341_prepare(struct drm_panel *panel) +{ + struct ili9341 *priv = panel_to_ili9341(panel); + struct mipi_dsi_device *dsi = priv->dsi; + u8 addr_mode; + int ret; + + gpiod_set_value_cansleep(priv->reset_gpiod, 0); + usleep_range(20, 1000); + gpiod_set_value_cansleep(priv->reset_gpiod, 1); + msleep(120); + + ret = mipi_dcs_command(dsi, MIPI_DCS_SOFT_RESET); + if (ret) { + dev_err(panel->dev, "Failed to send reset command: %d\n", ret); + return ret; + } + + /* Wait 5ms after soft reset per MIPI DCS spec */ + usleep_range(5000, 20000); + + mipi_dcs_command(dsi, MIPI_DCS_SET_DISPLAY_OFF); + + mipi_dcs_command(dsi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30); + mipi_dcs_command(dsi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); + mipi_dcs_command(dsi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78); + mipi_dcs_command(dsi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); + mipi_dcs_command(dsi, ILI9341_PUMPCTRL, 0x20); + mipi_dcs_command(dsi, ILI9341_DTCTRLB, 0x00, 0x00); + + /* Power Control */ + mipi_dcs_command(dsi, ILI9341_PWCTRL1, 0x23); + mipi_dcs_command(dsi, ILI9341_PWCTRL2, 0x10); + /* VCOM */ + mipi_dcs_command(dsi, ILI9341_VMCTRL1, 0x3e, 0x28); + mipi_dcs_command(dsi, ILI9341_VMCTRL2, 0x86); + + /* Memory Access Control */ + mipi_dcs_command(dsi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); + + /* Frame Rate */ + mipi_dcs_command(dsi, ILI9341_FRMCTR1, 0x00, 0x1b); + + /* Gamma */ + mipi_dcs_command(dsi, ILI9341_EN3GAM, 0x00); + mipi_dcs_command(dsi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); + mipi_dcs_command(dsi, ILI9341_PGAMCTRL, + 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1, + 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00); + mipi_dcs_command(dsi, ILI9341_NGAMCTRL, + 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1, + 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f); + + /* DDRAM */ + mipi_dcs_command(dsi, ILI9341_ETMOD, 0x07); + + /* Display */ + mipi_dcs_command(dsi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00); + mipi_dcs_command(dsi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + mipi_dcs_command(dsi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + + switch (priv->rotation) { + default: + addr_mode = ILI9341_MADCTL_MX; + break; + case 90: + addr_mode = ILI9341_MADCTL_MV; + break; + case 180: + addr_mode = ILI9341_MADCTL_MY; + break; + case 270: + addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | + ILI9341_MADCTL_MX; + break; + } + addr_mode |= ILI9341_MADCTL_BGR; + mipi_dcs_command(dsi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + + return 0; +} + +static int ili9341_enable(struct drm_panel *panel) +{ + struct ili9341 *priv = panel_to_ili9341(panel); + + backlight_enable(priv->backlight); + + return 0; +} + +static int ili9341_disable(struct drm_panel *panel) +{ + struct ili9341 *priv = panel_to_ili9341(panel); + + backlight_disable(priv->backlight); + + return 0; +} + +static int ili9341_unprepare(struct drm_panel *panel) +{ + struct ili9341 *priv = panel_to_ili9341(panel); + + mipi_dcs_command(priv->dsi, MIPI_DCS_SET_DISPLAY_OFF); + + return 0; +} + +static int ili9341_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct ili9341 *priv = panel_to_ili9341(panel); + struct drm_display_mode *mode; + u32 format = MEDIA_BUS_FMT_RGB565_1X16; + + mode = drm_mode_duplicate(connector->dev, &priv->pdata->mode); + if (!mode) { + dev_err(panel->dev, "failed to add mode %ux%ux@%u\n", + priv->pdata->mode.hdisplay, + priv->pdata->mode.vdisplay, + priv->pdata->mode.vrefresh); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + connector->display_info.bpc = 8; + connector->display_info.width_mm = priv->pdata->width_mm; + connector->display_info.height_mm = priv->pdata->height_mm; + + drm_display_info_set_bus_formats(&connector->display_info, &format, 1); + connector->display_info.bus_flags = DRM_BUS_FLAG_PIXDATA_POSEDGE; + + return 1; +} + +static const struct drm_panel_funcs ili9341_funcs = { + .prepare = ili9341_prepare, + .unprepare = ili9341_unprepare, + .enable = ili9341_enable, + .disable = ili9341_disable, + .get_modes = ili9341_get_modes, +}; + +static int ili9341_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct ili9341 *priv; + int ret; + + /* See comment for mipi_dbi_spi_init() */ + if (!dev->coherent_dma_mask) { + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) { + dev_warn(dev, "Failed to set dma mask %d\n", ret); + return ret; + } + } + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, priv); + priv->dsi = dsi; + + device_property_read_u32(dev, "rotation", &priv->rotation); + + priv->pdata = device_get_match_data(dev); + if (!priv->pdata) + return -EINVAL; + + drm_panel_init(&priv->panel, dev, &ili9341_funcs, + DRM_MODE_CONNECTOR_DPI); + + priv->reset_gpiod = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(priv->reset_gpiod)) { + dev_err(dev, "Couldn't get our reset GPIO\n"); + return PTR_ERR(priv->reset_gpiod); + } + + priv->backlight = devm_of_find_backlight(dev); + if (IS_ERR(priv->backlight)) { + ret = PTR_ERR(priv->backlight); + if (ret != -EPROBE_DEFER) + dev_err(dev, "Failed to get backlight handle\n"); + return ret; + } + + ret = drm_panel_add(&priv->panel); + if (ret < 0) { + dev_err(dev, "Failed to register panel\n"); + return ret; + } + + dsi->bus_type = priv->pdata->bus_type; + dsi->lanes = priv->pdata->lanes; + dsi->format = MIPI_DSI_FMT_RGB565; + + ret = mipi_dsi_attach(dsi); + if (ret) { + dev_err(dev, "Failed to attach DSI panel\n"); + goto err_panel_remove; + } + + ret = mipi_dsi_maybe_register_tiny_driver(dsi); + if (ret) { + dev_err(dev, "Failed to init TinyDRM driver\n"); + goto err_mipi_dsi_detach; + } + + return 0; + +err_mipi_dsi_detach: + mipi_dsi_detach(dsi); +err_panel_remove: + drm_panel_remove(&priv->panel); + return ret; +} + +static int ili9341_remove(struct mipi_dsi_device *dsi) +{ + struct ili9341 *priv = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_panel_remove(&priv->panel); + + if (priv->backlight) + put_device(&priv->backlight->dev); + + return 0; +} + +static const struct ili9341_pdata yx240qv29_pdata = { + .mode = { DRM_SIMPLE_MODE(240, 320, 37, 49) }, + .width_mm = 0, // TODO + .height_mm = 0, // TODO + .bus_type = MIPI_DEVICE_TYPE_DBI_SPI_MODE3, + .lanes = 1, +}; + +static const struct of_device_id ili9341_of_match[] = { + { .compatible = "adafruit,yx240qv29", .data = &yx240qv29_pdata }, + { } +}; +MODULE_DEVICE_TABLE(of, ili9341_of_match); + +static struct mipi_dsi_driver ili9341_dsi_driver = { + .probe = ili9341_probe, + .remove = ili9341_remove, + .driver = { + .name = "ili9341-dsi", + .of_match_table = ili9341_of_match, + }, +}; +module_mipi_dsi_driver(ili9341_dsi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9341 DRM panel driver"); +MODULE_AUTHOR("David Lechner david@lechnology.com"); +MODULE_AUTHOR("Paul Cercueil paul@crapouillou.net"); +MODULE_LICENSE("GPL");