Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0+
/*
 * DRM driver for the HX8357D LCD controller
 *
 * Copyright 2018 Broadcom
 * Copyright 2018 David Lechner <david@lechnology.com>
 * Copyright 2016 Noralf Trønnes
 * Copyright (C) 2015 Adafruit Industries
 * Copyright (C) 2013 Christian Vogelgsang
 */
 
#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_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modeset_helper.h>
#include <video/mipi_display.h>
 
#define HX8357D_SETOSC 0xb0
#define HX8357D_SETPOWER 0xb1
#define HX8357D_SETRGB 0xb3
#define HX8357D_SETCYC 0xb3
#define HX8357D_SETCOM 0xb6
#define HX8357D_SETEXTC 0xb9
#define HX8357D_SETSTBA 0xc0
#define HX8357D_SETPANEL 0xcc
#define HX8357D_SETGAMMA 0xe0
 
#define HX8357D_MADCTL_MY  0x80
#define HX8357D_MADCTL_MX  0x40
#define HX8357D_MADCTL_MV  0x20
#define HX8357D_MADCTL_ML  0x10
#define HX8357D_MADCTL_RGB 0x00
#define HX8357D_MADCTL_BGR 0x08
#define HX8357D_MADCTL_MH  0x04
 
static void yx240qv29_enable(struct drm_simple_display_pipe *pipe,
<------><------><------>     struct drm_crtc_state *crtc_state,
<------><------><------>     struct drm_plane_state *plane_state)
{
<------>struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
<------>struct mipi_dbi *dbi = &dbidev->dbi;
<------>u8 addr_mode;
<------>int ret, idx;
 
<------>if (!drm_dev_enter(pipe->crtc.dev, &idx))
<------><------>return;
 
<------>DRM_DEBUG_KMS("\n");
 
<------>ret = mipi_dbi_poweron_conditional_reset(dbidev);
<------>if (ret < 0)
<------><------>goto out_exit;
<------>if (ret == 1)
<------><------>goto out_enable;
 
<------>/* setextc */
<------>mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57);
<------>msleep(150);
 
<------>/* setRGB which also enables SDO */
<------>mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06);
 
<------>/* -1.52V */
<------>mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25);
 
<------>/* Normal mode 70Hz, Idle mode 55 Hz */
<------>mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68);
 
<------>/* Set Panel - BGR, Gate direction swapped */
<------>mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05);
 
<------>mipi_dbi_command(dbi, HX8357D_SETPOWER,
<------><------><------> 0x00,  /* Not deep standby */
<------><------><------> 0x15,  /* BT */
<------><------><------> 0x1C,  /* VSPR */
<------><------><------> 0x1C,  /* VSNR */
<------><------><------> 0x83,  /* AP */
<------><------><------> 0xAA);  /* FS */
 
<------>mipi_dbi_command(dbi, HX8357D_SETSTBA,
<------><------><------> 0x50,  /* OPON normal */
<------><------><------> 0x50,  /* OPON idle */
<------><------><------> 0x01,  /* STBA */
<------><------><------> 0x3C,  /* STBA */
<------><------><------> 0x1E,  /* STBA */
<------><------><------> 0x08);  /* GEN */
 
<------>mipi_dbi_command(dbi, HX8357D_SETCYC,
<------><------><------> 0x02,  /* NW 0x02 */
<------><------><------> 0x40,  /* RTN */
<------><------><------> 0x00,  /* DIV */
<------><------><------> 0x2A,  /* DUM */
<------><------><------> 0x2A,  /* DUM */
<------><------><------> 0x0D,  /* GDON */
<------><------><------> 0x78);  /* GDOFF */
 
<------>mipi_dbi_command(dbi, HX8357D_SETGAMMA,
<------><------><------> 0x02,
<------><------><------> 0x0A,
<------><------><------> 0x11,
<------><------><------> 0x1d,
<------><------><------> 0x23,
<------><------><------> 0x35,
<------><------><------> 0x41,
<------><------><------> 0x4b,
<------><------><------> 0x4b,
<------><------><------> 0x42,
<------><------><------> 0x3A,
<------><------><------> 0x27,
<------><------><------> 0x1B,
<------><------><------> 0x08,
<------><------><------> 0x09,
<------><------><------> 0x03,
<------><------><------> 0x02,
<------><------><------> 0x0A,
<------><------><------> 0x11,
<------><------><------> 0x1d,
<------><------><------> 0x23,
<------><------><------> 0x35,
<------><------><------> 0x41,
<------><------><------> 0x4b,
<------><------><------> 0x4b,
<------><------><------> 0x42,
<------><------><------> 0x3A,
<------><------><------> 0x27,
<------><------><------> 0x1B,
<------><------><------> 0x08,
<------><------><------> 0x09,
<------><------><------> 0x03,
<------><------><------> 0x00,
<------><------><------> 0x01);
 
<------>/* 16 bit */
<------>mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
<------><------><------> MIPI_DCS_PIXEL_FMT_16BIT);
 
<------>/* TE off */
<------>mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00);
 
<------>/* tear line */
<------>mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
 
<------>/* Exit Sleep */
<------>mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
<------>msleep(150);
 
<------>/* display on */
<------>mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
<------>usleep_range(5000, 7000);
 
out_enable:
<------>switch (dbidev->rotation) {
<------>default:
<------><------>addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
<------><------>break;
<------>case 90:
<------><------>addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
<------><------>break;
<------>case 180:
<------><------>addr_mode = 0;
<------><------>break;
<------>case 270:
<------><------>addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
<------><------>break;
<------>}
<------>mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
<------>mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
out_exit:
<------>drm_dev_exit(idx);
}
 
static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = {
<------>.enable = yx240qv29_enable,
<------>.disable = mipi_dbi_pipe_disable,
<------>.update = mipi_dbi_pipe_update,
<------>.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
};
 
static const struct drm_display_mode yx350hv15_mode = {
<------>DRM_SIMPLE_MODE(320, 480, 60, 75),
};
 
DEFINE_DRM_GEM_CMA_FOPS(hx8357d_fops);
 
static struct drm_driver hx8357d_driver = {
<------>.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
<------>.fops			= &hx8357d_fops,
<------>DRM_GEM_CMA_DRIVER_OPS_VMAP,
<------>.debugfs_init		= mipi_dbi_debugfs_init,
<------>.name			= "hx8357d",
<------>.desc			= "HX8357D",
<------>.date			= "20181023",
<------>.major			= 1,
<------>.minor			= 0,
};
 
static const struct of_device_id hx8357d_of_match[] = {
<------>{ .compatible = "adafruit,yx350hv15" },
<------>{ }
};
MODULE_DEVICE_TABLE(of, hx8357d_of_match);
 
static const struct spi_device_id hx8357d_id[] = {
<------>{ "yx350hv15", 0 },
<------>{ }
};
MODULE_DEVICE_TABLE(spi, hx8357d_id);
 
static int hx8357d_probe(struct spi_device *spi)
{
<------>struct device *dev = &spi->dev;
<------>struct mipi_dbi_dev *dbidev;
<------>struct drm_device *drm;
<------>struct gpio_desc *dc;
<------>u32 rotation = 0;
<------>int ret;
 
<------>dbidev = devm_drm_dev_alloc(dev, &hx8357d_driver,
<------><------><------><------>    struct mipi_dbi_dev, drm);
<------>if (IS_ERR(dbidev))
<------><------>return PTR_ERR(dbidev);
 
<------>drm = &dbidev->drm;
 
<------>dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW);
<------>if (IS_ERR(dc)) {
<------><------>DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
<------><------>return PTR_ERR(dc);
<------>}
 
<------>dbidev->backlight = devm_of_find_backlight(dev);
<------>if (IS_ERR(dbidev->backlight))
<------><------>return PTR_ERR(dbidev->backlight);
 
<------>device_property_read_u32(dev, "rotation", &rotation);
 
<------>ret = mipi_dbi_spi_init(spi, &dbidev->dbi, dc);
<------>if (ret)
<------><------>return ret;
 
<------>ret = mipi_dbi_dev_init(dbidev, &hx8357d_pipe_funcs, &yx350hv15_mode, rotation);
<------>if (ret)
<------><------>return ret;
 
<------>drm_mode_config_reset(drm);
 
<------>ret = drm_dev_register(drm, 0);
<------>if (ret)
<------><------>return ret;
 
<------>spi_set_drvdata(spi, drm);
 
<------>drm_fbdev_generic_setup(drm, 0);
 
<------>return 0;
}
 
static int hx8357d_remove(struct spi_device *spi)
{
<------>struct drm_device *drm = spi_get_drvdata(spi);
 
<------>drm_dev_unplug(drm);
<------>drm_atomic_helper_shutdown(drm);
 
<------>return 0;
}
 
static void hx8357d_shutdown(struct spi_device *spi)
{
<------>drm_atomic_helper_shutdown(spi_get_drvdata(spi));
}
 
static struct spi_driver hx8357d_spi_driver = {
<------>.driver = {
<------><------>.name = "hx8357d",
<------><------>.of_match_table = hx8357d_of_match,
<------>},
<------>.id_table = hx8357d_id,
<------>.probe = hx8357d_probe,
<------>.remove = hx8357d_remove,
<------>.shutdown = hx8357d_shutdown,
};
module_spi_driver(hx8357d_spi_driver);
 
MODULE_DESCRIPTION("HX8357D DRM driver");
MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
MODULE_LICENSE("GPL");