This adds a new driver for display panels that use the Ilitek ILI9341 controller. It currently supports a single display panel, namely the YX240QV29-T (e.g. Adafruit 2.4" TFT). The init sequence is from the Adafruit Python library for the ILI9341 controller. https://github.com/adafruit/Adafruit_Python_ILI9341 Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Reviewed-by: Noralf Trønnes <noralf@xxxxxxxxxxx> --- MAINTAINERS | 6 + drivers/gpu/drm/tinydrm/Kconfig | 10 ++ drivers/gpu/drm/tinydrm/Makefile | 1 + drivers/gpu/drm/tinydrm/ili9341.c | 233 ++++++++++++++++++++++++++++++ 4 files changed, 250 insertions(+) create mode 100644 drivers/gpu/drm/tinydrm/ili9341.c diff --git a/MAINTAINERS b/MAINTAINERS index bc219de9cbee..ffa099abbd79 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4480,6 +4480,12 @@ S: Maintained F: drivers/gpu/drm/tinydrm/ili9225.c F: Documentation/devicetree/bindings/display/ilitek,ili9225.txt +DRM DRIVER FOR ILITEK ILI9341 PANELS +M: David Lechner <david@xxxxxxxxxxxxxx> +S: Maintained +F: drivers/gpu/drm/tinydrm/ili9341.c +F: Documentation/devicetree/bindings/display/ilitek,ili9341.txt + DRM DRIVER FOR INTEL I810 VIDEO CARDS S: Orphan / Obsolete F: drivers/gpu/drm/i810/ diff --git a/drivers/gpu/drm/tinydrm/Kconfig b/drivers/gpu/drm/tinydrm/Kconfig index 4592a5e3f20b..7a8008b0783f 100644 --- a/drivers/gpu/drm/tinydrm/Kconfig +++ b/drivers/gpu/drm/tinydrm/Kconfig @@ -20,6 +20,16 @@ config TINYDRM_ILI9225 If M is selected the module will be called ili9225. +config TINYDRM_ILI9341 + tristate "DRM support for ILI9341 display panels" + depends on DRM_TINYDRM && SPI + select TINYDRM_MIPI_DBI + help + DRM driver for the following Ilitek ILI9341 panels: + * YX240QV29-T 2.4" 240x320 TFT (Adafruit 2.4") + + If M is selected the module will be called ili9341. + config TINYDRM_MI0283QT tristate "DRM support for MI0283QT" depends on DRM_TINYDRM && SPI diff --git a/drivers/gpu/drm/tinydrm/Makefile b/drivers/gpu/drm/tinydrm/Makefile index 49a111929724..14d99080665a 100644 --- a/drivers/gpu/drm/tinydrm/Makefile +++ b/drivers/gpu/drm/tinydrm/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_TINYDRM_MIPI_DBI) += mipi-dbi.o # Displays obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o +obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o obj-$(CONFIG_TINYDRM_ST7586) += st7586.o diff --git a/drivers/gpu/drm/tinydrm/ili9341.c b/drivers/gpu/drm/tinydrm/ili9341.c new file mode 100644 index 000000000000..8864dcde6edc --- /dev/null +++ b/drivers/gpu/drm/tinydrm/ili9341.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for Ilitek ILI9341 panels + * + * Copyright 2018 David Lechner <david@xxxxxxxxxxxxxx> + * + * Based on mi0283qt.c: + * Copyright 2016 Noralf Trønnes + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> + +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_modeset_helper.h> +#include <drm/tinydrm/mipi-dbi.h> +#include <drm/tinydrm/tinydrm-helpers.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) + +static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct tinydrm_device *tdev = pipe_to_tinydrm(pipe); + struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev); + u8 addr_mode; + int ret; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(mipi); + if (ret < 0) + return; + if (ret == 1) + goto out_enable; + + mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF); + + mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30); + mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); + mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78); + mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); + mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20); + mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00); + + /* Power Control */ + mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x23); + mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x10); + /* VCOM */ + mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x3e, 0x28); + mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0x86); + + /* Memory Access Control */ + mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); + + /* Frame Rate */ + mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b); + + /* Gamma */ + mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x00); + mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); + mipi_dbi_command(mipi, ILI9341_PGAMCTRL, + 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1, + 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00); + mipi_dbi_command(mipi, ILI9341_NGAMCTRL, + 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1, + 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f); + + /* DDRAM */ + mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07); + + /* Display */ + mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00); + mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + +out_enable: + switch (mipi->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_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(mipi, crtc_state, plane_state); +} + +static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = { + .enable = yx240qv29_enable, + .disable = mipi_dbi_pipe_disable, + .update = tinydrm_display_pipe_update, + .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb, +}; + +static const struct drm_display_mode yx240qv29_mode = { + TINYDRM_MODE(240, 320, 37, 49), +}; + +DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops); + +static struct drm_driver ili9341_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC, + .fops = &ili9341_fops, + TINYDRM_GEM_DRIVER_OPS, + .lastclose = drm_fb_helper_lastclose, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "ili9341", + .desc = "Ilitek ILI9341", + .date = "20180514", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id ili9341_of_match[] = { + { .compatible = "adafruit,yx240qv29" }, + { } +}; +MODULE_DEVICE_TABLE(of, ili9341_of_match); + +static const struct spi_device_id ili9341_id[] = { + { "yx240qv29", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ili9341_id); + +static int ili9341_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi *mipi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL); + if (!mipi) + return -ENOMEM; + + mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(mipi->reset)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); + return PTR_ERR(mipi->reset); + } + + dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); + return PTR_ERR(dc); + } + + mipi->backlight = devm_of_find_backlight(dev); + if (IS_ERR(mipi->backlight)) + return PTR_ERR(mipi->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, mipi, dc); + if (ret) + return ret; + + ret = mipi_dbi_init(&spi->dev, mipi, &ili9341_pipe_funcs, + &ili9341_driver, &yx240qv29_mode, rotation); + if (ret) + return ret; + + spi_set_drvdata(spi, mipi); + + return devm_tinydrm_register(&mipi->tinydrm); +} + +static void ili9341_shutdown(struct spi_device *spi) +{ + struct mipi_dbi *mipi = spi_get_drvdata(spi); + + tinydrm_shutdown(&mipi->tinydrm); +} + +static struct spi_driver ili9341_spi_driver = { + .driver = { + .name = "ili9341", + .of_match_table = ili9341_of_match, + }, + .id_table = ili9341_id, + .probe = ili9341_probe, + .shutdown = ili9341_shutdown, +}; +module_spi_driver(ili9341_spi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver"); +MODULE_AUTHOR("David Lechner <david@xxxxxxxxxxxxxx>"); +MODULE_LICENSE("GPL"); -- 2.17.0 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
