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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 rm68200 panel driver is inspired from the Linux Kernel driver
* drivers/gpu/drm/panel/panel-raydium-rm68200.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>
/*** Manufacturer Command Set ***/
#define MCS_CMD_MODE_SW 0xFE /* CMD Mode Switch */
#define MCS_CMD1_UCS 0x00 /* User Command Set (UCS = CMD1) */
#define MCS_CMD2_P0 0x01 /* Manufacture Command Set Page0 (CMD2 P0) */
#define MCS_CMD2_P1 0x02 /* Manufacture Command Set Page1 (CMD2 P1) */
#define MCS_CMD2_P2 0x03 /* Manufacture Command Set Page2 (CMD2 P2) */
#define MCS_CMD2_P3 0x04 /* Manufacture Command Set Page3 (CMD2 P3) */
/* CMD2 P0 commands (Display Options and Power) */
#define MCS_STBCTR 0x12 /* TE1 Output Setting Zig-Zag Connection */
#define MCS_SGOPCTR 0x16 /* Source Bias Current */
#define MCS_SDCTR 0x1A /* Source Output Delay Time */
#define MCS_INVCTR 0x1B /* Inversion Type */
#define MCS_EXT_PWR_IC 0x24 /* External PWR IC Control */
#define MCS_SETAVDD 0x27 /* PFM Control for AVDD Output */
#define MCS_SETAVEE 0x29 /* PFM Control for AVEE Output */
#define MCS_BT2CTR 0x2B /* DDVDL Charge Pump Control */
#define MCS_BT3CTR 0x2F /* VGH Charge Pump Control */
#define MCS_BT4CTR 0x34 /* VGL Charge Pump Control */
#define MCS_VCMCTR 0x46 /* VCOM Output Level Control */
#define MCS_SETVGN 0x52 /* VG M/S N Control */
#define MCS_SETVGP 0x54 /* VG M/S P Control */
#define MCS_SW_CTRL 0x5F /* Interface Control for PFM and MIPI */
/* CMD2 P2 commands (GOA Timing Control) - no description in datasheet */
#define GOA_VSTV1 0x00
#define GOA_VSTV2 0x07
#define GOA_VCLK1 0x0E
#define GOA_VCLK2 0x17
#define GOA_VCLK_OPT1 0x20
#define GOA_BICLK1 0x2A
#define GOA_BICLK2 0x37
#define GOA_BICLK3 0x44
#define GOA_BICLK4 0x4F
#define GOA_BICLK_OPT1 0x5B
#define GOA_BICLK_OPT2 0x60
#define MCS_GOA_GPO1 0x6D
#define MCS_GOA_GPO2 0x71
#define MCS_GOA_EQ 0x74
#define MCS_GOA_CLK_GALLON 0x7C
#define MCS_GOA_FS_SEL0 0x7E
#define MCS_GOA_FS_SEL1 0x87
#define MCS_GOA_FS_SEL2 0x91
#define MCS_GOA_FS_SEL3 0x9B
#define MCS_GOA_BS_SEL0 0xAC
#define MCS_GOA_BS_SEL1 0xB5
#define MCS_GOA_BS_SEL2 0xBF
#define MCS_GOA_BS_SEL3 0xC9
#define MCS_GOA_BS_SEL4 0xD3
/* CMD2 P3 commands (Gamma) */
#define MCS_GAMMA_VP 0x60 /* Gamma VP1~VP16 */
#define MCS_GAMMA_VN 0x70 /* Gamma VN1~VN16 */
struct rm68200_panel_priv {
struct udevice *reg;
struct udevice *backlight;
struct gpio_desc reset;
};
static const struct display_timing default_timing = {
.pixelclock.typ = 54000000,
.hactive.typ = 720,
.hfront_porch.typ = 48,
.hback_porch.typ = 48,
.hsync_len.typ = 9,
.vactive.typ = 1280,
.vfront_porch.typ = 12,
.vback_porch.typ = 12,
.vsync_len.typ = 5,
};
static void rm68200_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;
int err;
err = mipi_dsi_dcs_write_buffer(device, data, len);
if (err < 0)
dev_err(dev, "MIPI DSI DCS write buffer failed: %d\n", err);
}
static void rm68200_dcs_write_cmd(struct udevice *dev, u8 cmd, u8 value)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
int err;
err = mipi_dsi_dcs_write(device, cmd, &value, 1);
if (err < 0)
dev_err(dev, "MIPI DSI DCS write failed: %d\n", err);
}
#define dcs_write_seq(ctx, seq...) \
({ \
static const u8 d[] = { seq }; \
\
rm68200_dcs_write_buf(ctx, d, ARRAY_SIZE(d)); \
})
/*
* This panel is not able to auto-increment all cmd addresses so for some of
* them, we need to send them one by one...
*/
#define dcs_write_cmd_seq(ctx, cmd, seq...) \
({ \
static const u8 d[] = { seq }; \
unsigned int i; \
\
for (i = 0; i < ARRAY_SIZE(d) ; i++) \
rm68200_dcs_write_cmd(ctx, cmd + i, d[i]); \
})
static void rm68200_init_sequence(struct udevice *dev)
{
/* Enter CMD2 with page 0 */
dcs_write_seq(dev, MCS_CMD_MODE_SW, MCS_CMD2_P0);
dcs_write_cmd_seq(dev, MCS_EXT_PWR_IC, 0xC0, 0x53, 0x00);
dcs_write_seq(dev, MCS_BT2CTR, 0xE5);
dcs_write_seq(dev, MCS_SETAVDD, 0x0A);
dcs_write_seq(dev, MCS_SETAVEE, 0x0A);
dcs_write_seq(dev, MCS_SGOPCTR, 0x52);
dcs_write_seq(dev, MCS_BT3CTR, 0x53);
dcs_write_seq(dev, MCS_BT4CTR, 0x5A);
dcs_write_seq(dev, MCS_INVCTR, 0x00);
dcs_write_seq(dev, MCS_STBCTR, 0x0A);
dcs_write_seq(dev, MCS_SDCTR, 0x06);
dcs_write_seq(dev, MCS_VCMCTR, 0x56);
dcs_write_seq(dev, MCS_SETVGN, 0xA0, 0x00);
dcs_write_seq(dev, MCS_SETVGP, 0xA0, 0x00);
dcs_write_seq(dev, MCS_SW_CTRL, 0x11); /* 2 data lanes, see doc */
dcs_write_seq(dev, MCS_CMD_MODE_SW, MCS_CMD2_P2);
dcs_write_seq(dev, GOA_VSTV1, 0x05);
dcs_write_seq(dev, 0x02, 0x0B);
dcs_write_seq(dev, 0x03, 0x0F);
dcs_write_seq(dev, 0x04, 0x7D, 0x00, 0x50);
dcs_write_cmd_seq(dev, GOA_VSTV2, 0x05, 0x16, 0x0D, 0x11, 0x7D, 0x00,
0x50);
dcs_write_cmd_seq(dev, GOA_VCLK1, 0x07, 0x08, 0x01, 0x02, 0x00, 0x7D,
0x00, 0x85, 0x08);
dcs_write_cmd_seq(dev, GOA_VCLK2, 0x03, 0x04, 0x05, 0x06, 0x00, 0x7D,
0x00, 0x85, 0x08);
dcs_write_seq(dev, GOA_VCLK_OPT1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_seq(dev, GOA_BICLK1, 0x07, 0x08);
dcs_write_seq(dev, 0x2D, 0x01);
dcs_write_seq(dev, 0x2F, 0x02, 0x00, 0x40, 0x05, 0x08, 0x54, 0x7D,
0x00);
dcs_write_cmd_seq(dev, GOA_BICLK2, 0x03, 0x04, 0x05, 0x06, 0x00);
dcs_write_seq(dev, 0x3D, 0x40);
dcs_write_seq(dev, 0x3F, 0x05, 0x08, 0x54, 0x7D, 0x00);
dcs_write_seq(dev, GOA_BICLK3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(dev, GOA_BICLK4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00);
dcs_write_seq(dev, 0x58, 0x00, 0x00, 0x00);
dcs_write_seq(dev, GOA_BICLK_OPT1, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(dev, GOA_BICLK_OPT2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(dev, MCS_GOA_GPO1, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(dev, MCS_GOA_GPO2, 0x00, 0x20, 0x00);
dcs_write_seq(dev, MCS_GOA_EQ, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x00, 0x00);
dcs_write_seq(dev, MCS_GOA_CLK_GALLON, 0x00, 0x00);
dcs_write_cmd_seq(dev, MCS_GOA_FS_SEL0, 0xBF, 0x02, 0x06, 0x14, 0x10,
0x16, 0x12, 0x08, 0x3F);
dcs_write_cmd_seq(dev, MCS_GOA_FS_SEL1, 0x3F, 0x3F, 0x3F, 0x3F, 0x0C,
0x0A, 0x0E, 0x3F, 0x3F, 0x00);
dcs_write_cmd_seq(dev, MCS_GOA_FS_SEL2, 0x04, 0x3F, 0x3F, 0x3F, 0x3F,
0x05, 0x01, 0x3F, 0x3F, 0x0F);
dcs_write_cmd_seq(dev, MCS_GOA_FS_SEL3, 0x0B, 0x0D, 0x3F, 0x3F, 0x3F,
0x3F);
dcs_write_cmd_seq(dev, 0xA2, 0x3F, 0x09, 0x13, 0x17, 0x11, 0x15);
dcs_write_cmd_seq(dev, 0xA9, 0x07, 0x03, 0x3F);
dcs_write_cmd_seq(dev, MCS_GOA_BS_SEL0, 0x3F, 0x05, 0x01, 0x17, 0x13,
0x15, 0x11, 0x0F, 0x3F);
dcs_write_cmd_seq(dev, MCS_GOA_BS_SEL1, 0x3F, 0x3F, 0x3F, 0x3F, 0x0B,
0x0D, 0x09, 0x3F, 0x3F, 0x07);
dcs_write_cmd_seq(dev, MCS_GOA_BS_SEL2, 0x03, 0x3F, 0x3F, 0x3F, 0x3F,
0x02, 0x06, 0x3F, 0x3F, 0x08);
dcs_write_cmd_seq(dev, MCS_GOA_BS_SEL3, 0x0C, 0x0A, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x0E, 0x10, 0x14);
dcs_write_cmd_seq(dev, MCS_GOA_BS_SEL4, 0x12, 0x16, 0x00, 0x04, 0x3F);
dcs_write_seq(dev, 0xDC, 0x02);
dcs_write_seq(dev, 0xDE, 0x12);
dcs_write_seq(dev, MCS_CMD_MODE_SW, 0x0E); /* No documentation */
dcs_write_seq(dev, 0x01, 0x75);
dcs_write_seq(dev, MCS_CMD_MODE_SW, MCS_CMD2_P3);
dcs_write_cmd_seq(dev, MCS_GAMMA_VP, 0x00, 0x0C, 0x12, 0x0E, 0x06,
0x12, 0x0E, 0x0B, 0x15, 0x0B, 0x10, 0x07, 0x0F,
0x12, 0x0C, 0x00);
dcs_write_cmd_seq(dev, MCS_GAMMA_VN, 0x00, 0x0C, 0x12, 0x0E, 0x06,
0x12, 0x0E, 0x0B, 0x15, 0x0B, 0x10, 0x07, 0x0F,
0x12, 0x0C, 0x00);
/* Exit CMD2 */
dcs_write_seq(dev, MCS_CMD_MODE_SW, MCS_CMD1_UCS);
}
static int rm68200_panel_enable_backlight(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
struct mipi_dsi_device *device = plat->device;
struct rm68200_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = mipi_dsi_attach(device);
if (ret < 0)
return ret;
rm68200_init_sequence(dev);
ret = mipi_dsi_dcs_exit_sleep_mode(device);
if (ret)
return ret;
mdelay(125);
ret = mipi_dsi_dcs_set_display_on(device);
if (ret)
return ret;
mdelay(20);
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
return 0;
}
static int rm68200_panel_get_display_timing(struct udevice *dev,
struct display_timing *timings)
{
memcpy(timings, &default_timing, sizeof(*timings));
return 0;
}
static int rm68200_panel_ofdata_to_platdata(struct udevice *dev)
{
struct rm68200_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;
}
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (ret) {
dev_err(dev, "Cannot get backlight: ret=%d\n", ret);
return ret;
}
return 0;
}
static int rm68200_panel_probe(struct udevice *dev)
{
struct rm68200_panel_priv *priv = dev_get_priv(dev);
struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
int ret;
if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
ret = regulator_set_enable(priv->reg, true);
if (ret)
return ret;
}
/* reset panel */
dm_gpio_set_value(&priv->reset, true);
mdelay(1);
dm_gpio_set_value(&priv->reset, false);
mdelay(10);
/* fill characteristics of DSI data link */
plat->lanes = 2;
plat->format = MIPI_DSI_FMT_RGB888;
plat->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM;
return 0;
}
static const struct panel_ops rm68200_panel_ops = {
.enable_backlight = rm68200_panel_enable_backlight,
.get_display_timing = rm68200_panel_get_display_timing,
};
static const struct udevice_id rm68200_panel_ids[] = {
{ .compatible = "raydium,rm68200" },
{ }
};
U_BOOT_DRIVER(rm68200_panel) = {
.name = "rm68200_panel",
.id = UCLASS_PANEL,
.of_match = rm68200_panel_ids,
.ops = &rm68200_panel_ops,
.ofdata_to_platdata = rm68200_panel_ofdata_to_platdata,
.probe = rm68200_panel_probe,
.platdata_auto_alloc_size = sizeof(struct mipi_dsi_panel_plat),
.priv_auto_alloc_size = sizeof(struct rm68200_panel_priv),
};
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