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// 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_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,
.release = mipi_dbi_release,
DRM_GEM_CMA_VMAP_DRIVER_OPS,
.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 = kzalloc(sizeof(*dbidev), GFP_KERNEL);
if (!dbidev)
return -ENOMEM;
drm = &dbidev->drm;
ret = devm_drm_dev_init(dev, drm, &hx8357d_driver);
if (ret) {
kfree(dbidev);
return ret;
}
drm_mode_config_init(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");
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