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linux/drivers/gpu/drm/panel/panel-ilitek-ili9341.c
Dillon Min 5a04227326 drm/panel: Add ilitek ili9341 panel driver 
This driver combines tiny/ili9341.c mipi_dbi_interface driver
with mipi_dpi_interface driver, can support ili9341 with serial
mode and parallel rgb interface mode by different dts bindings.

Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1627098243-2742-4-git-send-email-dillon.minfei@gmail.com
2021-08-05 11:09:23 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Ilitek ILI9341 TFT LCD drm_panel driver.
*
* This panel can be configured to support:
* - 16-bit parallel RGB interface
* - 18-bit parallel RGB interface
* - 4-line serial spi interface
*
* Copyright (C) 2021 Dillon Min <dillon.minfei@gmail.com>
*
* For dbi+dpi part:
* Derived from drivers/drm/gpu/panel/panel-ilitek-ili9322.c
* the reuse of DBI abstraction part referred from Linus's patch
* "drm/panel: s6e63m0: Switch to DBI abstraction for SPI"
*
* For only-dbi part, copy from David's code (drm/tiny/ili9341.c)
* Copyright 2018 David Lechner <david@lechnology.com>
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_atomic_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_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#define ILI9341_RGB_INTERFACE 0xb0 /* RGB Interface Signal Control */
#define ILI9341_FRC 0xb1 /* Frame Rate Control register */
#define ILI9341_DFC 0xb6 /* Display Function Control register */
#define ILI9341_POWER1 0xc0 /* Power Control 1 register */
#define ILI9341_POWER2 0xc1 /* Power Control 2 register */
#define ILI9341_VCOM1 0xc5 /* VCOM Control 1 register */
#define ILI9341_VCOM2 0xc7 /* VCOM Control 2 register */
#define ILI9341_POWERA 0xcb /* Power control A register */
#define ILI9341_POWERB 0xcf /* Power control B register */
#define ILI9341_PGAMMA 0xe0 /* Positive Gamma Correction register */
#define ILI9341_NGAMMA 0xe1 /* Negative Gamma Correction register */
#define ILI9341_DTCA 0xe8 /* Driver timing control A */
#define ILI9341_DTCB 0xea /* Driver timing control B */
#define ILI9341_POWER_SEQ 0xed /* Power on sequence register */
#define ILI9341_3GAMMA_EN 0xf2 /* 3 Gamma enable register */
#define ILI9341_INTERFACE 0xf6 /* Interface control register */
#define ILI9341_PRC 0xf7 /* Pump ratio control register */
#define ILI9341_ETMOD 0xb7 /* Entry mode set */
#define ILI9341_MADCTL_BGR BIT(3)
#define ILI9341_MADCTL_MV BIT(5)
#define ILI9341_MADCTL_MX BIT(6)
#define ILI9341_MADCTL_MY BIT(7)
#define ILI9341_POWER_B_LEN 3
#define ILI9341_POWER_SEQ_LEN 4
#define ILI9341_DTCA_LEN 3
#define ILI9341_DTCB_LEN 2
#define ILI9341_POWER_A_LEN 5
#define ILI9341_DFC_1_LEN 2
#define ILI9341_FRC_LEN 2
#define ILI9341_VCOM_1_LEN 2
#define ILI9341_DFC_2_LEN 4
#define ILI9341_COLUMN_ADDR_LEN 4
#define ILI9341_PAGE_ADDR_LEN 4
#define ILI9341_INTERFACE_LEN 3
#define ILI9341_PGAMMA_LEN 15
#define ILI9341_NGAMMA_LEN 15
#define ILI9341_CA_LEN 3
#define ILI9341_PIXEL_DPI_16_BITS (BIT(6) | BIT(4))
#define ILI9341_PIXEL_DPI_18_BITS (BIT(6) | BIT(5))
#define ILI9341_GAMMA_CURVE_1 BIT(0)
#define ILI9341_IF_WE_MODE BIT(0)
#define ILI9341_IF_BIG_ENDIAN 0x00
#define ILI9341_IF_DM_RGB BIT(2)
#define ILI9341_IF_DM_INTERNAL 0x00
#define ILI9341_IF_DM_VSYNC BIT(3)
#define ILI9341_IF_RM_RGB BIT(1)
#define ILI9341_IF_RIM_RGB 0x00
#define ILI9341_COLUMN_ADDR 0x00ef
#define ILI9341_PAGE_ADDR 0x013f
#define ILI9341_RGB_EPL BIT(0)
#define ILI9341_RGB_DPL BIT(1)
#define ILI9341_RGB_HSPL BIT(2)
#define ILI9341_RGB_VSPL BIT(3)
#define ILI9341_RGB_DE_MODE BIT(6)
#define ILI9341_RGB_DISP_PATH_MEM BIT(7)
#define ILI9341_DBI_VCOMH_4P6V 0x23
#define ILI9341_DBI_PWR_2_DEFAULT 0x10
#define ILI9341_DBI_PRC_NORMAL 0x20
#define ILI9341_DBI_VCOM_1_VMH_4P25V 0x3e
#define ILI9341_DBI_VCOM_1_VML_1P5V 0x28
#define ILI9341_DBI_VCOM_2_DEC_58 0x86
#define ILI9341_DBI_FRC_DIVA 0x00
#define ILI9341_DBI_FRC_RTNA 0x1b
#define ILI9341_DBI_EMS_GAS BIT(0)
#define ILI9341_DBI_EMS_DTS BIT(1)
#define ILI9341_DBI_EMS_GON BIT(2)
/* struct ili9341_config - the system specific ILI9341 configuration */
struct ili9341_config {
u32 max_spi_speed;
/* mode: the drm display mode */
const struct drm_display_mode mode;
/* ca: TODO: need comments for this register */
u8 ca[ILI9341_CA_LEN];
/* power_b: TODO: need comments for this register */
u8 power_b[ILI9341_POWER_B_LEN];
/* power_seq: TODO: need comments for this register */
u8 power_seq[ILI9341_POWER_SEQ_LEN];
/* dtca: TODO: need comments for this register */
u8 dtca[ILI9341_DTCA_LEN];
/* dtcb: TODO: need comments for this register */
u8 dtcb[ILI9341_DTCB_LEN];
/* power_a: TODO: need comments for this register */
u8 power_a[ILI9341_POWER_A_LEN];
/* frc: Frame Rate Control (In Normal Mode/Full Colors) (B1h) */
u8 frc[ILI9341_FRC_LEN];
/* prc: TODO: need comments for this register */
u8 prc;
/* dfc_1: B6h DISCTRL (Display Function Control) */
u8 dfc_1[ILI9341_DFC_1_LEN];
/* power_1: Power Control 1 (C0h) */
u8 power_1;
/* power_2: Power Control 2 (C1h) */
u8 power_2;
/* vcom_1: VCOM Control 1(C5h) */
u8 vcom_1[ILI9341_VCOM_1_LEN];
/* vcom_2: VCOM Control 2(C7h) */
u8 vcom_2;
/* address_mode: Memory Access Control (36h) */
u8 address_mode;
/* g3amma_en: TODO: need comments for this register */
u8 g3amma_en;
/* rgb_interface: RGB Interface Signal Control (B0h) */
u8 rgb_interface;
/* dfc_2: refer to dfc_1 */
u8 dfc_2[ILI9341_DFC_2_LEN];
/* column_addr: Column Address Set (2Ah) */
u8 column_addr[ILI9341_COLUMN_ADDR_LEN];
/* page_addr: Page Address Set (2Bh) */
u8 page_addr[ILI9341_PAGE_ADDR_LEN];
/* interface: Interface Control (F6h) */
u8 interface[ILI9341_INTERFACE_LEN];
/*
* pixel_format: This command sets the pixel format for the RGB
* image data used by
*/
u8 pixel_format;
/*
* gamma_curve: This command is used to select the desired Gamma
* curve for the
*/
u8 gamma_curve;
/* pgamma: Positive Gamma Correction (E0h) */
u8 pgamma[ILI9341_PGAMMA_LEN];
/* ngamma: Negative Gamma Correction (E1h) */
u8 ngamma[ILI9341_NGAMMA_LEN];
};
struct ili9341 {
struct device *dev;
const struct ili9341_config *conf;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct gpio_desc *dc_gpio;
struct mipi_dbi *dbi;
u32 max_spi_speed;
struct regulator_bulk_data supplies[3];
};
/*
* The Stm32f429-disco board has a panel ili9341 connected to ltdc controller
*/
static const struct ili9341_config ili9341_stm32f429_disco_data = {
.max_spi_speed = 10000000,
.mode = {
.clock = 6100,
.hdisplay = 240,
.hsync_start = 240 + 10,/* hfp 10 */
.hsync_end = 240 + 10 + 10,/* hsync 10 */
.htotal = 240 + 10 + 10 + 20,/* hbp 20 */
.vdisplay = 320,
.vsync_start = 320 + 4,/* vfp 4 */
.vsync_end = 320 + 4 + 2,/* vsync 2 */
.vtotal = 320 + 4 + 2 + 2,/* vbp 2 */
.flags = 0,
.width_mm = 65,
.height_mm = 50,
.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
},
.ca = {0xc3, 0x08, 0x50},
.power_b = {0x00, 0xc1, 0x30},
.power_seq = {0x64, 0x03, 0x12, 0x81},
.dtca = {0x85, 0x00, 0x78},
.power_a = {0x39, 0x2c, 0x00, 0x34, 0x02},
.prc = 0x20,
.dtcb = {0x00, 0x00},
/* 0x00 fosc, 0x1b 70hz */
.frc = {0x00, 0x1b},
/*
* 0x0a Interval scan, AGND AGND AGND AGND
* 0xa2 Normally white, G1 -> G320, S720 -> S1,
* Scan Cycle 5 frames,85ms
*/
.dfc_1 = {0x0a, 0xa2},
/* 0x10 3.65v */
.power_1 = 0x10,
/* 0x10 AVDD=vci*2, VGH=vci*7, VGL=-vci*4 */
.power_2 = 0x10,
/* 0x45 VCOMH 4.425v, 0x15 VCOML -1.975*/
.vcom_1 = {0x45, 0x15},
/* 0x90 offset voltage, VMH-48, VML-48 */
.vcom_2 = 0x90,
/*
* 0xc8 Row Address Order, Column Address Order
* BGR 1
*/
.address_mode = 0xc8,
.g3amma_en = 0x00,
/*
* 0xc2
* Display Data Path: Memory
* RGB: DE mode
* DOTCLK polarity set (data fetched at the falling time)
*/
.rgb_interface = ILI9341_RGB_DISP_PATH_MEM |
ILI9341_RGB_DE_MODE |
ILI9341_RGB_DPL,
/*
* 0x0a
* Gate outputs in non-display area: Interval scan
* Determine source/VCOM output in a non-display area in the partial
* display mode: AGND AGND AGND AGND
*
* 0xa7
* Scan Cycle: 15 frames
* fFLM = 60Hz: 255ms
* Liquid crystal type: Normally white
* Gate Output Scan Direction: G1 -> G320
* Source Output Scan Direction: S720 -> S1
*
* 0x27
* LCD Driver Line: 320 lines
*
* 0x04
* PCDIV: 4
*/
.dfc_2 = {0x0a, 0xa7, 0x27, 0x04},
/* column address: 240 */
.column_addr = {0x00, 0x00, (ILI9341_COLUMN_ADDR >> 4) & 0xff,
ILI9341_COLUMN_ADDR & 0xff},
/* page address: 320 */
.page_addr = {0x00, 0x00, (ILI9341_PAGE_ADDR >> 4) & 0xff,
ILI9341_PAGE_ADDR & 0xff},
/*
* Memory write control: When the transfer number of data exceeds
* (EC-SC+1)*(EP-SP+1), the column and page number will be
* reset, and the exceeding data will be written into the following
* column and page.
* Display Operation Mode: RGB Interface Mode
* Interface for RAM Access: RGB interface
* 16- bit RGB interface (1 transfer/pixel)
*/
.interface = {ILI9341_IF_WE_MODE, 0x00,
ILI9341_IF_DM_RGB | ILI9341_IF_RM_RGB},
/* DPI: 16 bits / pixel */
.pixel_format = ILI9341_PIXEL_DPI_16_BITS,
/* Curve Selected: Gamma curve 1 (G2.2) */
.gamma_curve = ILI9341_GAMMA_CURVE_1,
.pgamma = {0x0f, 0x29, 0x24, 0x0c, 0x0e,
0x09, 0x4e, 0x78, 0x3c, 0x09,
0x13, 0x05, 0x17, 0x11, 0x00},
.ngamma = {0x00, 0x16, 0x1b, 0x04, 0x11,
0x07, 0x31, 0x33, 0x42, 0x05,
0x0c, 0x0a, 0x28, 0x2f, 0x0f},
};
static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel)
{
return container_of(panel, struct ili9341, panel);
}
static void ili9341_dpi_init(struct ili9341 *ili)
{
struct device *dev = (&ili->panel)->dev;
struct mipi_dbi *dbi = ili->dbi;
struct ili9341_config *cfg = (struct ili9341_config *)ili->conf;
/* Power Control */
mipi_dbi_command_stackbuf(dbi, 0xca, cfg->ca, ILI9341_CA_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_POWERB, cfg->power_b,
ILI9341_POWER_B_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_POWER_SEQ, cfg->power_seq,
ILI9341_POWER_SEQ_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_DTCA, cfg->dtca,
ILI9341_DTCA_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_POWERA, cfg->power_a,
ILI9341_POWER_A_LEN);
mipi_dbi_command(ili->dbi, ILI9341_PRC, cfg->prc);
mipi_dbi_command_stackbuf(dbi, ILI9341_DTCB, cfg->dtcb,
ILI9341_DTCB_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_FRC, cfg->frc, ILI9341_FRC_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_1,
ILI9341_DFC_1_LEN);
mipi_dbi_command(dbi, ILI9341_POWER1, cfg->power_1);
mipi_dbi_command(dbi, ILI9341_POWER2, cfg->power_2);
/* VCOM */
mipi_dbi_command_stackbuf(dbi, ILI9341_VCOM1, cfg->vcom_1,
ILI9341_VCOM_1_LEN);
mipi_dbi_command(dbi, ILI9341_VCOM2, cfg->vcom_2);
mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, cfg->address_mode);
/* Gamma */
mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, cfg->g3amma_en);
mipi_dbi_command(dbi, ILI9341_RGB_INTERFACE, cfg->rgb_interface);
mipi_dbi_command_stackbuf(dbi, ILI9341_DFC, cfg->dfc_2,
ILI9341_DFC_2_LEN);
/* Colomn address set */
mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_COLUMN_ADDRESS,
cfg->column_addr, ILI9341_COLUMN_ADDR_LEN);
/* Page address set */
mipi_dbi_command_stackbuf(dbi, MIPI_DCS_SET_PAGE_ADDRESS,
cfg->page_addr, ILI9341_PAGE_ADDR_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_INTERFACE, cfg->interface,
ILI9341_INTERFACE_LEN);
/* Format */
mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, cfg->pixel_format);
mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START);
msleep(200);
mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, cfg->gamma_curve);
mipi_dbi_command_stackbuf(dbi, ILI9341_PGAMMA, cfg->pgamma,
ILI9341_PGAMMA_LEN);
mipi_dbi_command_stackbuf(dbi, ILI9341_NGAMMA, cfg->ngamma,
ILI9341_NGAMMA_LEN);
mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
msleep(200);
mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
mipi_dbi_command(dbi, MIPI_DCS_WRITE_MEMORY_START);
dev_info(dev, "Initialized display rgb interface\n");
}
static int ili9341_dpi_power_on(struct ili9341 *ili)
{
struct device *dev = (&ili->panel)->dev;
int ret = 0;
/* Assert RESET */
gpiod_set_value(ili->reset_gpio, 1);
/* Enable power */
ret = regulator_bulk_enable(ARRAY_SIZE(ili->supplies),
ili->supplies);
if (ret < 0) {
dev_err(dev, "unable to enable vcc\n");
return ret;
}
msleep(20);
/* De-assert RESET */
gpiod_set_value(ili->reset_gpio, 0);
msleep(20);
return 0;
}
static int ili9341_dpi_power_off(struct ili9341 *ili)
{
/* Assert RESET */
gpiod_set_value(ili->reset_gpio, 1);
/* Disable power */
return regulator_bulk_disable(ARRAY_SIZE(ili->supplies),
ili->supplies);
}
static int ili9341_dpi_disable(struct drm_panel *panel)
{
struct ili9341 *ili = panel_to_ili9341(panel);
mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_OFF);
return 0;
}
static int ili9341_dpi_unprepare(struct drm_panel *panel)
{
struct ili9341 *ili = panel_to_ili9341(panel);
return ili9341_dpi_power_off(ili);
}
static int ili9341_dpi_prepare(struct drm_panel *panel)
{
struct ili9341 *ili = panel_to_ili9341(panel);
int ret;
ret = ili9341_dpi_power_on(ili);
if (ret < 0)
return ret;
ili9341_dpi_init(ili);
return ret;
}
static int ili9341_dpi_enable(struct drm_panel *panel)
{
struct ili9341 *ili = panel_to_ili9341(panel);
mipi_dbi_command(ili->dbi, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
static int ili9341_dpi_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct ili9341 *ili = panel_to_ili9341(panel);
struct drm_device *drm = connector->dev;
struct drm_display_mode *mode;
struct drm_display_info *info;
info = &connector->display_info;
info->width_mm = ili->conf->mode.width_mm;
info->height_mm = ili->conf->mode.height_mm;
if (ili->conf->rgb_interface & ILI9341_RGB_DPL)
info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
else
info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
if (ili->conf->rgb_interface & ILI9341_RGB_EPL)
info->bus_flags |= DRM_BUS_FLAG_DE_LOW;
else
info->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
mode = drm_mode_duplicate(drm, &ili->conf->mode);
if (!mode) {
drm_err(drm, "bad mode or failed to add mode\n");
return -EINVAL;
}
drm_mode_set_name(mode);
/* Set up the polarity */
if (ili->conf->rgb_interface & ILI9341_RGB_HSPL)
mode->flags |= DRM_MODE_FLAG_PHSYNC;
else
mode->flags |= DRM_MODE_FLAG_NHSYNC;
if (ili->conf->rgb_interface & ILI9341_RGB_VSPL)
mode->flags |= DRM_MODE_FLAG_PVSYNC;
else
mode->flags |= DRM_MODE_FLAG_NVSYNC;
drm_mode_probed_add(connector, mode);
return 1; /* Number of modes */
}
static const struct drm_panel_funcs ili9341_dpi_funcs = {
.disable = ili9341_dpi_disable,
.unprepare = ili9341_dpi_unprepare,
.prepare = ili9341_dpi_prepare,
.enable = ili9341_dpi_enable,
.get_modes = ili9341_dpi_get_modes,
};
static void ili9341_dbi_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;
ret = mipi_dbi_poweron_conditional_reset(dbidev);
if (ret < 0)
goto out_exit;
if (ret == 1)
goto out_enable;
mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
mipi_dbi_command(dbi, ILI9341_POWERB, 0x00, 0xc1, 0x30);
mipi_dbi_command(dbi, ILI9341_POWER_SEQ, 0x64, 0x03, 0x12, 0x81);
mipi_dbi_command(dbi, ILI9341_DTCA, 0x85, 0x00, 0x78);
mipi_dbi_command(dbi, ILI9341_POWERA, 0x39, 0x2c, 0x00, 0x34, 0x02);
mipi_dbi_command(dbi, ILI9341_PRC, ILI9341_DBI_PRC_NORMAL);
mipi_dbi_command(dbi, ILI9341_DTCB, 0x00, 0x00);
/* Power Control */
mipi_dbi_command(dbi, ILI9341_POWER1, ILI9341_DBI_VCOMH_4P6V);
mipi_dbi_command(dbi, ILI9341_POWER2, ILI9341_DBI_PWR_2_DEFAULT);
/* VCOM */
mipi_dbi_command(dbi, ILI9341_VCOM1, ILI9341_DBI_VCOM_1_VMH_4P25V,
ILI9341_DBI_VCOM_1_VML_1P5V);
mipi_dbi_command(dbi, ILI9341_VCOM2, ILI9341_DBI_VCOM_2_DEC_58);
/* Memory Access Control */
mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT,
MIPI_DCS_PIXEL_FMT_16BIT);
/* Frame Rate */
mipi_dbi_command(dbi, ILI9341_FRC, ILI9341_DBI_FRC_DIVA & 0x03,
ILI9341_DBI_FRC_RTNA & 0x1f);
/* Gamma */
mipi_dbi_command(dbi, ILI9341_3GAMMA_EN, 0x00);
mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, ILI9341_GAMMA_CURVE_1);
mipi_dbi_command(dbi, ILI9341_PGAMMA,
0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
mipi_dbi_command(dbi, ILI9341_NGAMMA,
0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
/* DDRAM */
mipi_dbi_command(dbi, ILI9341_ETMOD, ILI9341_DBI_EMS_GAS |
ILI9341_DBI_EMS_DTS |
ILI9341_DBI_EMS_GON);
/* Display */
mipi_dbi_command(dbi, ILI9341_DFC, 0x08, 0x82, 0x27, 0x00);
mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
msleep(100);
mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
msleep(100);
out_enable:
switch (dbidev->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(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
drm_info(&dbidev->drm, "Initialized display serial interface\n");
out_exit:
drm_dev_exit(idx);
}
static const struct drm_simple_display_pipe_funcs ili9341_dbi_funcs = {
.enable = ili9341_dbi_enable,
.disable = mipi_dbi_pipe_disable,
.update = mipi_dbi_pipe_update,
.prepare_fb = drm_gem_simple_display_pipe_prepare_fb,
};
static const struct drm_display_mode ili9341_dbi_mode = {
DRM_SIMPLE_MODE(240, 320, 37, 49),
};
DEFINE_DRM_GEM_CMA_FOPS(ili9341_dbi_fops);
static struct drm_driver ili9341_dbi_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.fops = &ili9341_dbi_fops,
DRM_GEM_CMA_DRIVER_OPS_VMAP,
.debugfs_init = mipi_dbi_debugfs_init,
.name = "ili9341",
.desc = "Ilitek ILI9341",
.date = "20210716",
.major = 1,
.minor = 0,
};
static int ili9341_dbi_probe(struct spi_device *spi, struct gpio_desc *dc,
struct gpio_desc *reset)
{
struct device *dev = &spi->dev;
struct mipi_dbi_dev *dbidev;
struct mipi_dbi *dbi;
struct drm_device *drm;
struct regulator *vcc;
u32 rotation = 0;
int ret;
vcc = devm_regulator_get_optional(dev, "vcc");
if (IS_ERR(vcc))
dev_err(dev, "get optional vcc failed\n");
dbidev = devm_drm_dev_alloc(dev, &ili9341_dbi_driver,
struct mipi_dbi_dev, drm);
if (IS_ERR(dbidev))
return PTR_ERR(dbidev);
dbi = &dbidev->dbi;
drm = &dbidev->drm;
dbi->reset = reset;
dbidev->regulator = vcc;
drm_mode_config_init(drm);
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, dbi, dc);
if (ret)
return ret;
ret = mipi_dbi_dev_init(dbidev, &ili9341_dbi_funcs,
&ili9341_dbi_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 ili9341_dpi_probe(struct spi_device *spi, struct gpio_desc *dc,
struct gpio_desc *reset)
{
struct device *dev = &spi->dev;
struct ili9341 *ili;
int ret;
ili = devm_kzalloc(dev, sizeof(struct ili9341), GFP_KERNEL);
if (!ili)
return -ENOMEM;
ili->dbi = devm_kzalloc(dev, sizeof(struct mipi_dbi),
GFP_KERNEL);
if (!ili->dbi)
return -ENOMEM;
ili->supplies[0].supply = "vci";
ili->supplies[1].supply = "vddi";
ili->supplies[2].supply = "vddi-led";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ili->supplies),
ili->supplies);
if (ret < 0) {
dev_err(dev, "failed to get regulators: %d\n", ret);
return ret;
}
ret = mipi_dbi_spi_init(spi, ili->dbi, dc);
if (ret)
return ret;
spi_set_drvdata(spi, ili);
ili->reset_gpio = reset;
/*
* Every new incarnation of this display must have a unique
* data entry for the system in this driver.
*/
ili->conf = of_device_get_match_data(dev);
if (!ili->conf) {
dev_err(dev, "missing device configuration\n");
return -ENODEV;
}
ili->max_spi_speed = ili->conf->max_spi_speed;
drm_panel_init(&ili->panel, dev, &ili9341_dpi_funcs,
DRM_MODE_CONNECTOR_DPI);
drm_panel_add(&ili->panel);
return 0;
}
static int ili9341_probe(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct gpio_desc *dc;
struct gpio_desc *reset;
const struct spi_device_id *id = spi_get_device_id(spi);
reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(reset))
dev_err(dev, "Failed to get gpio 'reset'\n");
dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
if (IS_ERR(dc))
dev_err(dev, "Failed to get gpio 'dc'\n");
if (!strcmp(id->name, "sf-tc240t-9370-t"))
return ili9341_dpi_probe(spi, dc, reset);
else if (!strcmp(id->name, "yx240qv29"))
return ili9341_dbi_probe(spi, dc, reset);
return -1;
}
static int ili9341_remove(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
struct ili9341 *ili = spi_get_drvdata(spi);
struct drm_device *drm = spi_get_drvdata(spi);
if (!strcmp(id->name, "sf-tc240t-9370-t")) {
ili9341_dpi_power_off(ili);
drm_panel_remove(&ili->panel);
} else if (!strcmp(id->name, "yx240qv29")) {
drm_dev_unplug(drm);
drm_atomic_helper_shutdown(drm);
}
return 0;
}
static void ili9341_shutdown(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
if (!strcmp(id->name, "yx240qv29"))
drm_atomic_helper_shutdown(spi_get_drvdata(spi));
}
static const struct of_device_id ili9341_of_match[] = {
{
.compatible = "st,sf-tc240t-9370-t",
.data = &ili9341_stm32f429_disco_data,
},
{
/* porting from tiny/ili9341.c
* for original mipi dbi compitable
*/
.compatible = "adafruit,yx240qv29",
.data = NULL,
},
{ }
};
MODULE_DEVICE_TABLE(of, ili9341_of_match);
static const struct spi_device_id ili9341_id[] = {
{ "yx240qv29", 0 },
{ "sf-tc240t-9370-t", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, ili9341_id);
static struct spi_driver ili9341_driver = {
.probe = ili9341_probe,
.remove = ili9341_remove,
.shutdown = ili9341_shutdown,
.id_table = ili9341_id,
.driver = {
.name = "panel-ilitek-ili9341",
.of_match_table = ili9341_of_match,
},
};
module_spi_driver(ili9341_driver);
MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>");
MODULE_DESCRIPTION("ILI9341 LCD panel driver");
MODULE_LICENSE("GPL v2");
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