233 lines
6 KiB
C
233 lines
6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* DRM driver for Ilitek ILI9341 panels
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*
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* Copyright 2018 David Lechner <david@lechnology.com>
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*
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* Based on mi0283qt.c:
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* Copyright 2016 Noralf Trønnes
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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/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/property.h>
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#include <linux/spi/spi.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_modeset_helper.h>
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#include <drm/tinydrm/mipi-dbi.h>
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#include <drm/tinydrm/tinydrm-helpers.h>
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#include <video/mipi_display.h>
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#define ILI9341_FRMCTR1 0xb1
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#define ILI9341_DISCTRL 0xb6
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#define ILI9341_ETMOD 0xb7
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#define ILI9341_PWCTRL1 0xc0
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#define ILI9341_PWCTRL2 0xc1
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#define ILI9341_VMCTRL1 0xc5
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#define ILI9341_VMCTRL2 0xc7
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#define ILI9341_PWCTRLA 0xcb
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#define ILI9341_PWCTRLB 0xcf
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#define ILI9341_PGAMCTRL 0xe0
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#define ILI9341_NGAMCTRL 0xe1
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#define ILI9341_DTCTRLA 0xe8
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#define ILI9341_DTCTRLB 0xea
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#define ILI9341_PWRSEQ 0xed
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#define ILI9341_EN3GAM 0xf2
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#define ILI9341_PUMPCTRL 0xf7
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#define ILI9341_MADCTL_BGR BIT(3)
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#define ILI9341_MADCTL_MV BIT(5)
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#define ILI9341_MADCTL_MX BIT(6)
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#define ILI9341_MADCTL_MY BIT(7)
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static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
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struct drm_crtc_state *crtc_state,
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struct drm_plane_state *plane_state)
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{
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struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
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struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
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u8 addr_mode;
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int ret;
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DRM_DEBUG_KMS("\n");
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ret = mipi_dbi_poweron_conditional_reset(mipi);
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if (ret < 0)
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return;
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if (ret == 1)
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goto out_enable;
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mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
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mipi_dbi_command(mipi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
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mipi_dbi_command(mipi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
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mipi_dbi_command(mipi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
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mipi_dbi_command(mipi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
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mipi_dbi_command(mipi, ILI9341_PUMPCTRL, 0x20);
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mipi_dbi_command(mipi, ILI9341_DTCTRLB, 0x00, 0x00);
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/* Power Control */
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mipi_dbi_command(mipi, ILI9341_PWCTRL1, 0x23);
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mipi_dbi_command(mipi, ILI9341_PWCTRL2, 0x10);
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/* VCOM */
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mipi_dbi_command(mipi, ILI9341_VMCTRL1, 0x3e, 0x28);
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mipi_dbi_command(mipi, ILI9341_VMCTRL2, 0x86);
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/* Memory Access Control */
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mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
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/* Frame Rate */
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mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
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/* Gamma */
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mipi_dbi_command(mipi, ILI9341_EN3GAM, 0x00);
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mipi_dbi_command(mipi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
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mipi_dbi_command(mipi, ILI9341_PGAMCTRL,
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0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
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0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
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mipi_dbi_command(mipi, ILI9341_NGAMCTRL,
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0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
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0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
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/* DDRAM */
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mipi_dbi_command(mipi, ILI9341_ETMOD, 0x07);
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/* Display */
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mipi_dbi_command(mipi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
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mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
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msleep(100);
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mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
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msleep(100);
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out_enable:
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switch (mipi->rotation) {
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default:
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addr_mode = ILI9341_MADCTL_MX;
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break;
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case 90:
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addr_mode = ILI9341_MADCTL_MV;
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break;
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case 180:
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addr_mode = ILI9341_MADCTL_MY;
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break;
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case 270:
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addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
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ILI9341_MADCTL_MX;
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break;
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}
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addr_mode |= ILI9341_MADCTL_BGR;
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mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
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mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
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}
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static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = {
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.enable = yx240qv29_enable,
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.disable = mipi_dbi_pipe_disable,
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.update = tinydrm_display_pipe_update,
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.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
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};
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static const struct drm_display_mode yx240qv29_mode = {
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TINYDRM_MODE(240, 320, 37, 49),
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};
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DEFINE_DRM_GEM_CMA_FOPS(ili9341_fops);
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static struct drm_driver ili9341_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
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.fops = &ili9341_fops,
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TINYDRM_GEM_DRIVER_OPS,
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.debugfs_init = mipi_dbi_debugfs_init,
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.name = "ili9341",
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.desc = "Ilitek ILI9341",
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.date = "20180514",
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.major = 1,
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.minor = 0,
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};
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static const struct of_device_id ili9341_of_match[] = {
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{ .compatible = "adafruit,yx240qv29" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, ili9341_of_match);
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static const struct spi_device_id ili9341_id[] = {
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{ "yx240qv29", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, ili9341_id);
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static int ili9341_probe(struct spi_device *spi)
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{
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struct device *dev = &spi->dev;
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struct mipi_dbi *mipi;
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struct gpio_desc *dc;
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u32 rotation = 0;
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int ret;
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mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
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if (!mipi)
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return -ENOMEM;
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mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(mipi->reset)) {
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DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
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return PTR_ERR(mipi->reset);
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}
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dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
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if (IS_ERR(dc)) {
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DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
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return PTR_ERR(dc);
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}
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mipi->backlight = devm_of_find_backlight(dev);
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if (IS_ERR(mipi->backlight))
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return PTR_ERR(mipi->backlight);
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device_property_read_u32(dev, "rotation", &rotation);
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ret = mipi_dbi_spi_init(spi, mipi, dc);
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if (ret)
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return ret;
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ret = mipi_dbi_init(&spi->dev, mipi, &ili9341_pipe_funcs,
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&ili9341_driver, &yx240qv29_mode, rotation);
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if (ret)
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return ret;
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spi_set_drvdata(spi, mipi);
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return devm_tinydrm_register(&mipi->tinydrm);
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}
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static void ili9341_shutdown(struct spi_device *spi)
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{
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struct mipi_dbi *mipi = spi_get_drvdata(spi);
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tinydrm_shutdown(&mipi->tinydrm);
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}
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static struct spi_driver ili9341_spi_driver = {
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.driver = {
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.name = "ili9341",
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.of_match_table = ili9341_of_match,
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},
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.id_table = ili9341_id,
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.probe = ili9341_probe,
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.shutdown = ili9341_shutdown,
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};
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module_spi_driver(ili9341_spi_driver);
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MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
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MODULE_AUTHOR("David Lechner <david@lechnology.com>");
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MODULE_LICENSE("GPL");
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