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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 STMicroelectronics - All Rights Reserved
* Author(s): Yannick Fertre <yannick.fertre@st.com> for STMicroelectronics.
* Philippe Cornu <philippe.cornu@st.com> for STMicroelectronics.
*
* This otm8009a panel driver is inspired from the Linux Kernel driver
* drivers/gpu/drm/panel/panel-orisetech-otm8009a.c.
*/
#include <common.h>
#include <backlight.h>
#include <dm.h>
#include <mipi_dsi.h>
#include <panel.h>
#include <asm/gpio.h>
#include <dm/device_compat.h>
#include <linux/delay.h>
#include <power/regulator.h>
#define OTM8009A_BACKLIGHT_DEFAULT 240
#define OTM8009A_BACKLIGHT_MAX 255
/* Manufacturer Command Set */
#define MCS_ADRSFT 0x0000 /* Address Shift Function */
#define MCS_PANSET 0xB3A6 /* Panel Type Setting */
#define MCS_SD_CTRL 0xC0A2 /* Source Driver Timing Setting */
#define MCS_P_DRV_M 0xC0B4 /* Panel Driving Mode */
#define MCS_OSC_ADJ 0xC181 /* Oscillator Adjustment for Idle/Normal mode */
#define MCS_RGB_VID_SET 0xC1A1 /* RGB Video Mode Setting */
#define MCS_SD_PCH_CTRL 0xC480 /* Source Driver Precharge Control */
#define MCS_NO_DOC1 0xC48A /* Command not documented */
#define MCS_PWR_CTRL1 0xC580 /* Power Control Setting 1 */
#define MCS_PWR_CTRL2 0xC590 /* Power Control Setting 2 for Normal Mode */
#define MCS_PWR_CTRL4 0xC5B0 /* Power Control Setting 4 for DC Voltage */
#define MCS_PANCTRLSET1 0xCB80 /* Panel Control Setting 1 */
#define MCS_PANCTRLSET2 0xCB90 /* Panel Control Setting 2 */
#define MCS_PANCTRLSET3 0xCBA0 /* Panel Control Setting 3 */
#define MCS_PANCTRLSET4 0xCBB0 /* Panel Control Setting 4 */
#define MCS_PANCTRLSET5 0xCBC0 /* Panel Control Setting 5 */
#define MCS_PANCTRLSET6 0xCBD0 /* Panel Control Setting 6 */
#define MCS_PANCTRLSET7 0xCBE0 /* Panel Control Setting 7 */
#define MCS_PANCTRLSET8 0xCBF0 /* Panel Control Setting 8 */
#define MCS_PANU2D1 0xCC80 /* Panel U2D Setting 1 */
#define MCS_PANU2D2 0xCC90 /* Panel U2D Setting 2 */
#define MCS_PANU2D3 0xCCA0 /* Panel U2D Setting 3 */
#define MCS_PAND2U1 0xCCB0 /* Panel D2U Setting 1 */
#define MCS_PAND2U2 0xCCC0 /* Panel D2U Setting 2 */
#define MCS_PAND2U3 0xCCD0 /* Panel D2U Setting 3 */
#define MCS_GOAVST 0xCE80 /* GOA VST Setting */
#define MCS_GOACLKA1 0xCEA0 /* GOA CLKA1 Setting */
#define MCS_GOACLKA3 0xCEB0 /* GOA CLKA3 Setting */
#define MCS_GOAECLK 0xCFC0 /* GOA ECLK Setting */
#define MCS_NO_DOC2 0xCFD0 /* Command not documented */
#define MCS_GVDDSET 0xD800 /* GVDD/NGVDD */
#define MCS_VCOMDC 0xD900 /* VCOM Voltage Setting */
#define MCS_GMCT2_2P 0xE100 /* Gamma Correction 2.2+ Setting */
#define MCS_GMCT2_2N 0xE200 /* Gamma Correction 2.2- Setting */
#define MCS_NO_DOC3 0xF5B6 /* Command not documented */
#define MCS_CMD2_ENA1 0xFF00 /* Enable Access Command2 "CMD2" */
#define MCS_CMD2_ENA2 0xFF80 /* Enable Access Orise Command2 */
struct otm8009a_panel_priv {
struct udevice *reg;
struct gpio_desc reset;
unsigned int lanes;
enum mipi_dsi_pixel_format format;
unsigned long mode_flags;
};
static const struct display_timing default_timing = {
.pixelclock.typ = 29700000,
.hactive.typ = 480,
.hfront_porch.typ = 98,
.hback_porch.typ = 98,
.hsync_len.typ = 32,
.vactive.typ = 800,
.vfront_porch.typ = 15,
.vback_porch.typ = 14,
.vsync_len.typ = 10,
};
static void otm8009a_dcs_write_buf(struct udevice *dev, const void *data,
size_t len)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
if (mipi_dsi_dcs_write_buffer(device, data, len) < 0)
dev_err(dev, "mipi dsi dcs write buffer failed\n");
}
static void otm8009a_dcs_write_buf_hs(struct udevice *dev, const void *data,
size_t len)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
/* data will be sent in dsi hs mode (ie. no lpm) */
device->mode_flags &= ~MIPI_DSI_MODE_LPM;
if (mipi_dsi_dcs_write_buffer(device, data, len) < 0)
dev_err(dev, "mipi dsi dcs write buffer failed\n");
/* restore back the dsi lpm mode */
device->mode_flags |= MIPI_DSI_MODE_LPM;
}
#define dcs_write_seq(dev, seq...) \
({ \
static const u8 d[] = { seq }; \
otm8009a_dcs_write_buf(dev, d, ARRAY_SIZE(d)); \
})
#define dcs_write_seq_hs(dev, seq...) \
({ \
static const u8 d[] = { seq }; \
otm8009a_dcs_write_buf_hs(dev, d, ARRAY_SIZE(d)); \
})
#define dcs_write_cmd_at(dev, cmd, seq...) \
({ \
static const u16 c = cmd; \
struct udevice *device = dev; \
dcs_write_seq(device, MCS_ADRSFT, (c) & 0xFF); \
dcs_write_seq(device, (c) >> 8, seq); \
})
static int otm8009a_init_sequence(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
int ret;
/* Enter CMD2 */
dcs_write_cmd_at(dev, MCS_CMD2_ENA1, 0x80, 0x09, 0x01);
/* Enter Orise Command2 */
dcs_write_cmd_at(dev, MCS_CMD2_ENA2, 0x80, 0x09);
dcs_write_cmd_at(dev, MCS_SD_PCH_CTRL, 0x30);
mdelay(10);
dcs_write_cmd_at(dev, MCS_NO_DOC1, 0x40);
mdelay(10);
dcs_write_cmd_at(dev, MCS_PWR_CTRL4 + 1, 0xA9);
dcs_write_cmd_at(dev, MCS_PWR_CTRL2 + 1, 0x34);
dcs_write_cmd_at(dev, MCS_P_DRV_M, 0x50);
dcs_write_cmd_at(dev, MCS_VCOMDC, 0x4E);
dcs_write_cmd_at(dev, MCS_OSC_ADJ, 0x66); /* 65Hz */
dcs_write_cmd_at(dev, MCS_PWR_CTRL2 + 2, 0x01);
dcs_write_cmd_at(dev, MCS_PWR_CTRL2 + 5, 0x34);
dcs_write_cmd_at(dev, MCS_PWR_CTRL2 + 4, 0x33);
dcs_write_cmd_at(dev, MCS_GVDDSET, 0x79, 0x79);
dcs_write_cmd_at(dev, MCS_SD_CTRL + 1, 0x1B);
dcs_write_cmd_at(dev, MCS_PWR_CTRL1 + 2, 0x83);
dcs_write_cmd_at(dev, MCS_SD_PCH_CTRL + 1, 0x83);
dcs_write_cmd_at(dev, MCS_RGB_VID_SET, 0x0E);
dcs_write_cmd_at(dev, MCS_PANSET, 0x00, 0x01);
dcs_write_cmd_at(dev, MCS_GOAVST, 0x85, 0x01, 0x00, 0x84, 0x01, 0x00);
dcs_write_cmd_at(dev, MCS_GOACLKA1, 0x18, 0x04, 0x03, 0x39, 0x00, 0x00,
0x00, 0x18, 0x03, 0x03, 0x3A, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_GOACLKA3, 0x18, 0x02, 0x03, 0x3B, 0x00, 0x00,
0x00, 0x18, 0x01, 0x03, 0x3C, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_GOAECLK, 0x01, 0x01, 0x20, 0x20, 0x00, 0x00,
0x01, 0x02, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_NO_DOC2, 0x00);
dcs_write_cmd_at(dev, MCS_PANCTRLSET1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET5, 0, 4, 4, 4, 4, 4, 0, 0, 0, 0,
0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET6, 0, 0, 0, 0, 0, 0, 4, 4, 4, 4,
4, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
dcs_write_cmd_at(dev, MCS_PANCTRLSET8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF);
dcs_write_cmd_at(dev, MCS_PANU2D1, 0x00, 0x26, 0x09, 0x0B, 0x01, 0x25,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_PANU2D2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x26, 0x0A, 0x0C, 0x02);
dcs_write_cmd_at(dev, MCS_PANU2D3, 0x25, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_PAND2U1, 0x00, 0x25, 0x0C, 0x0A, 0x02, 0x26,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_PAND2U2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x25, 0x0B, 0x09, 0x01);
dcs_write_cmd_at(dev, MCS_PAND2U3, 0x26, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_at(dev, MCS_PWR_CTRL1 + 1, 0x66);
dcs_write_cmd_at(dev, MCS_NO_DOC3, 0x06);
dcs_write_cmd_at(dev, MCS_GMCT2_2P, 0x00, 0x09, 0x0F, 0x0E, 0x07, 0x10,
0x0B, 0x0A, 0x04, 0x07, 0x0B, 0x08, 0x0F, 0x10, 0x0A,
0x01);
dcs_write_cmd_at(dev, MCS_GMCT2_2N, 0x00, 0x09, 0x0F, 0x0E, 0x07, 0x10,
0x0B, 0x0A, 0x04, 0x07, 0x0B, 0x08, 0x0F, 0x10, 0x0A,
0x01);
/* Exit CMD2 */
dcs_write_cmd_at(dev, MCS_CMD2_ENA1, 0xFF, 0xFF, 0xFF);
ret = mipi_dsi_dcs_nop(device);
if (ret)
return ret;
ret = mipi_dsi_dcs_exit_sleep_mode(device);
if (ret)
return ret;
/* Wait for sleep out exit */
mdelay(120);
/* Default portrait 480x800 rgb24 */
dcs_write_seq(dev, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
ret = mipi_dsi_dcs_set_column_address(device, 0,
default_timing.hactive.typ - 1);
if (ret)
return ret;
ret = mipi_dsi_dcs_set_page_address(device, 0,
default_timing.vactive.typ - 1);
if (ret)
return ret;
/* See otm8009a driver documentation for pixel format descriptions */
ret = mipi_dsi_dcs_set_pixel_format(device, MIPI_DCS_PIXEL_FMT_24BIT |
MIPI_DCS_PIXEL_FMT_24BIT << 4);
if (ret)
return ret;
/* Disable CABC feature */
dcs_write_seq(dev, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
ret = mipi_dsi_dcs_set_display_on(device);
if (ret)
return ret;
ret = mipi_dsi_dcs_nop(device);
if (ret)
return ret;
/* Send Command GRAM memory write (no parameters) */
dcs_write_seq(dev, MIPI_DCS_WRITE_MEMORY_START);
return 0;
}
static int otm8009a_panel_enable_backlight(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
int ret;
ret = mipi_dsi_attach(device);
if (ret < 0)
return ret;
ret = otm8009a_init_sequence(dev);
if (ret)
return ret;
/*
* Power on the backlight with the requested brightness
* Note We can not use mipi_dsi_dcs_set_display_brightness()
* as otm8009a driver support only 8-bit brightness (1 param).
*/
dcs_write_seq(dev, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
OTM8009A_BACKLIGHT_DEFAULT);
/* Update Brightness Control & Backlight */
dcs_write_seq(dev, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
/* Update Brightness Control & Backlight */
dcs_write_seq_hs(dev, MIPI_DCS_WRITE_CONTROL_DISPLAY);
/* Need to wait a few time before sending the first image */
mdelay(10);
return 0;
}
static int otm8009a_panel_get_display_timing(struct udevice *dev,
struct display_timing *timings)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
struct otm8009a_panel_priv *priv = dev_get_priv(dev);
memcpy(timings, &default_timing, sizeof(*timings));
/* fill characteristics of DSI data link */
device->lanes = priv->lanes;
device->format = priv->format;
device->mode_flags = priv->mode_flags;
return 0;
}
static int otm8009a_panel_ofdata_to_platdata(struct udevice *dev)
{
struct otm8009a_panel_priv *priv = dev_get_priv(dev);
int ret;
if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
ret = device_get_supply_regulator(dev, "power-supply",
&priv->reg);
if (ret && ret != -ENOENT) {
dev_err(dev, "Warning: cannot get power supply\n");
return ret;
}
}
ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset,
GPIOD_IS_OUT);
if (ret) {
dev_err(dev, "warning: cannot get reset GPIO\n");
if (ret != -ENOENT)
return ret;
}
return 0;
}
static int otm8009a_panel_probe(struct udevice *dev)
{
struct otm8009a_panel_priv *priv = dev_get_priv(dev);
int ret;
if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
dev_dbg(dev, "enable regulator '%s'\n", priv->reg->name);
ret = regulator_set_enable(priv->reg, true);
if (ret)
return ret;
}
/* reset panel */
dm_gpio_set_value(&priv->reset, true);
mdelay(1); /* >50us */
dm_gpio_set_value(&priv->reset, false);
mdelay(10); /* >5ms */
priv->lanes = 2;
priv->format = MIPI_DSI_FMT_RGB888;
priv->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM;
return 0;
}
static const struct panel_ops otm8009a_panel_ops = {
.enable_backlight = otm8009a_panel_enable_backlight,
.get_display_timing = otm8009a_panel_get_display_timing,
};
static const struct udevice_id otm8009a_panel_ids[] = {
{ .compatible = "orisetech,otm8009a" },
{ }
};
U_BOOT_DRIVER(otm8009a_panel) = {
.name = "otm8009a_panel",
.id = UCLASS_PANEL,
.of_match = otm8009a_panel_ids,
.ops = &otm8009a_panel_ops,
.ofdata_to_platdata = otm8009a_panel_ofdata_to_platdata,
.probe = otm8009a_panel_probe,
.platdata_auto_alloc_size = sizeof(struct mipi_dsi_panel_plat),
.priv_auto_alloc_size = sizeof(struct otm8009a_panel_priv),
};
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