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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2025 Ion Agorria <[email protected]>
*/
#include <backlight.h>
#include <dm.h>
#include <panel.h>
#include <log.h>
#include <malloc.h>
#include <spi.h>
#include <mipi_display.h>
#include <linux/delay.h>
#include <power/regulator.h>
#include <asm/gpio.h>
#define S6E63M0_DCS_CMD 0
#define S6E63M0_DCS_DATA 1
#define S6E63M0_INFO_FLAG_PGAMMACTL BIT(0)
#define S6E63M0_INFO_FLAG_GAMMA_DELTA BIT(1)
#define S6E63M0_GTCON_FLAG_FLIP_H BIT(0)
#define S6E63M0_GTCON_FLAG_FLIP_V BIT(1)
/* Manufacturer Command Set */
#define MCS_PENTILE_1 0xb3
#define MCS_GAMMA_DELTA_Y_RED 0xb5
#define MCS_GAMMA_DELTA_X_RED 0xb6
#define MCS_GAMMA_DELTA_Y_GREEN 0xb7
#define MCS_GAMMA_DELTA_X_GREEN 0xb8
#define MCS_GAMMA_DELTA_Y_BLUE 0xb9
#define MCS_GAMMA_DELTA_X_BLUE 0xba
#define MCS_DISCTL 0xf2
#define MCS_SRCCTL 0xf6
#define MCS_IFCTL 0xf7
#define MCS_PANELCTL 0xf8
#define MCS_PGAMMACTL 0xfa
#define MCS_PANELCTL_LEN 14
#define MCS_IFCTL_LEN 3
#define MCS_PGAMMACTL_LEN 22
#define MCS_GAMMA_DELTA_Y_LEN 32
#define MCS_GAMMA_DELTA_X_LEN 16
struct s6e63m0_priv {
struct udevice *vdd3;
struct udevice *vci;
struct s6e63m0_info *info;
struct gpio_desc reset_gpio;
u8 gtcon;
};
struct s6e63m0_info {
const u32 flags;
struct display_timing timing;
const u8 cmd_mcs_panelctl[MCS_PANELCTL_LEN];
const u8 cmd_mcs_pgammactl_1[MCS_PGAMMACTL_LEN];
const u8 cmd_mcs_pgammactl_2;
const u8 cmd_mcs_gamma_delta_y[MCS_GAMMA_DELTA_Y_LEN];
const u8 cmd_mcs_gamma_delta_x[MCS_GAMMA_DELTA_X_LEN];
};
static const struct s6e63m0_info s6e63m0_generic_info = {
.flags = S6E63M0_INFO_FLAG_GAMMA_DELTA,
.timing = {
.pixelclock.typ = 25628,
.hactive.typ = 480,
.hfront_porch.typ = 16,
.hback_porch.typ = 16,
.hsync_len.typ = 2,
.vactive.typ = 800,
.vfront_porch.typ = 28,
.vback_porch.typ = 1,
.vsync_len.typ = 2,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
},
.cmd_mcs_panelctl = {
0x01, /* DOCT */ 0x27, /* CLWEA */
0x27, /* CLWEB*/ 0x07, /* CLTE */
0x07, /* SHE */ 0x54, /* FLTE */
0x9F, /* FLWE */ 0x63, /* SCTE */
0x8F, /* SCWE */ 0x1A, /* INTE */
0x33, /* INWE */ 0x0D, /* EMPS */
0x00, /* E_INTE */ 0x00 /* E_INWE */
},
.cmd_mcs_pgammactl_1 = {
0x00, 0x18, 0x08, 0x24, 0x64, 0x56, 0x33, 0xb6,
0xba, 0xa8, 0xac, 0xb1, 0x9d, 0xc1, 0xc1, 0xb7,
0x00, 0x9c, 0x00, 0x9f, 0x00, 0xd6
},
.cmd_mcs_pgammactl_2 = 0x01,
.cmd_mcs_gamma_delta_y = {
0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, 0x13,
0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, 0x1a, 0x17,
0x2b, 0x26, 0x22, 0x20, 0x3a, 0x34, 0x30, 0x2c,
0x29, 0x26, 0x25, 0x23, 0x21, 0x20, 0x1e, 0x1e
},
.cmd_mcs_gamma_delta_x = {
0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, 0x44,
0x55, 0x55, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66
},
};
static const struct s6e63m0_info samsung_bose_panel_info = {
.flags = S6E63M0_INFO_FLAG_PGAMMACTL | S6E63M0_INFO_FLAG_GAMMA_DELTA,
.timing = {
.pixelclock.typ = 24000000,
.hactive.typ = 480,
.hfront_porch.typ = 16,
.hback_porch.typ = 14,
.hsync_len.typ = 2,
.vactive.typ = 800,
.vfront_porch.typ = 28,
.vback_porch.typ = 1,
.vsync_len.typ = 2,
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_LOW | DISPLAY_FLAGS_PIXDATA_NEGEDGE,
},
.cmd_mcs_panelctl = {
0x01, /* DOCT */ 0x27, /* CLWEA */
0x27, /* CLWEB*/ 0x07, /* CLTE */
0x07, /* SHE */ 0x54, /* FLTE */
0x9F, /* FLWE */ 0x63, /* SCTE */
0x86, /* SCWE */ 0x1A, /* INTE */
0x33, /* INWE */ 0x0D, /* EMPS */
0x00, /* E_INTE */ 0x00 /* E_INWE */
},
.cmd_mcs_pgammactl_1 = {
0x02, 0x18, 0x08, 0x24, 0x70, 0x6e, 0x4e, 0xbc,
0xc0, 0xaf, 0xb3, 0xb8, 0xa5, 0xc5, 0xc7, 0xbb,
0x00, 0xb9, 0x00, 0xb8, 0x00, 0xfc
},
.cmd_mcs_pgammactl_2 = 0x03,
.cmd_mcs_gamma_delta_y = {
0x2c, 0x12, 0x0c, 0x0a, 0x10, 0x0e, 0x17, 0x13,
0x1f, 0x1a, 0x2a, 0x24, 0x1f, 0x1b, 0x1a, 0x17,
0x2b, 0x26, 0x22, 0x20, 0x3a, 0x34, 0x30, 0x2c,
0x29, 0x26, 0x25, 0x23, 0x21, 0x20, 0x1e, 0x1e
},
.cmd_mcs_gamma_delta_x = {
0x00, 0x00, 0x11, 0x22, 0x33, 0x44, 0x44, 0x44,
0x55, 0x55, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66
},
};
static int s6e63m0_dcs_write(struct udevice *dev, u8 cmd, const u8 *seq, size_t len)
{
int ret;
u8 data[2];
int i;
data[0] = S6E63M0_DCS_CMD;
data[1] = cmd;
ret = dm_spi_xfer(dev, 9, &data, NULL, SPI_XFER_ONCE);
if (ret)
return ret;
for (i = 0; i < len; i++) {
data[0] = S6E63M0_DCS_DATA;
data[1] = seq[i];
ret = dm_spi_xfer(dev, 9, &data, NULL, SPI_XFER_ONCE);
if (ret)
return ret;
}
return 0;
}
#define s6e63m0_dcs_write_seq_static(dev, cmd, seq ...) ({ \
static const u8 d[] = { seq }; \
ret = s6e63m0_dcs_write(dev, cmd, d, ARRAY_SIZE(d)); \
if (ret) \
return ret; \
})
static int s6e63m0_enable_backlight(struct udevice *dev)
{
struct s6e63m0_priv *priv = dev_get_priv(dev);
struct s6e63m0_info *info = priv->info;
u8 cmd_mcs_ifctl[MCS_IFCTL_LEN];
int ret;
ret = s6e63m0_dcs_write(dev, MCS_PANELCTL, info->cmd_mcs_panelctl, MCS_PANELCTL_LEN);
if (ret)
return ret;
s6e63m0_dcs_write_seq_static(dev, MCS_DISCTL,
0x02, /* Number of Line */
0x03, /* VBP */
0x1c, /* VFP */
0x10, /* HBP */
0x10); /* HFP */
cmd_mcs_ifctl[0] = priv->gtcon; /* GTCON */
cmd_mcs_ifctl[1] = 0x00; /* Display Mode */
cmd_mcs_ifctl[2] = 0x00; /* Vsync/Hsync, DOCCLK, RGB mode */
ret = s6e63m0_dcs_write(dev, MCS_IFCTL, cmd_mcs_ifctl, MCS_IFCTL_LEN);
if (ret)
return ret;
if (info->flags & S6E63M0_INFO_FLAG_PGAMMACTL) {
ret = s6e63m0_dcs_write(dev, MCS_PGAMMACTL, info->cmd_mcs_pgammactl_1,
MCS_PGAMMACTL_LEN);
if (ret)
return ret;
s6e63m0_dcs_write(dev, MCS_PGAMMACTL, &info->cmd_mcs_pgammactl_2, 1);
}
s6e63m0_dcs_write_seq_static(dev, MCS_SRCCTL, 0x00, 0x8e, 0x07);
s6e63m0_dcs_write_seq_static(dev, MCS_PENTILE_1, 0x6c);
if (info->flags & S6E63M0_INFO_FLAG_GAMMA_DELTA) {
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_Y_RED, info->cmd_mcs_gamma_delta_y,
MCS_GAMMA_DELTA_Y_LEN);
if (ret)
return ret;
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_X_RED, info->cmd_mcs_gamma_delta_x,
MCS_GAMMA_DELTA_X_LEN);
if (ret)
return ret;
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_Y_GREEN, info->cmd_mcs_gamma_delta_y,
MCS_GAMMA_DELTA_Y_LEN);
if (ret)
return ret;
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_X_GREEN, info->cmd_mcs_gamma_delta_x,
MCS_GAMMA_DELTA_X_LEN);
if (ret)
return ret;
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_Y_BLUE, info->cmd_mcs_gamma_delta_y,
MCS_GAMMA_DELTA_Y_LEN);
if (ret)
return ret;
ret = s6e63m0_dcs_write(dev, MCS_GAMMA_DELTA_X_BLUE, info->cmd_mcs_gamma_delta_x,
MCS_GAMMA_DELTA_X_LEN);
if (ret)
return ret;
}
s6e63m0_dcs_write_seq_static(dev, MIPI_DCS_EXIT_SLEEP_MODE);
s6e63m0_dcs_write_seq_static(dev, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
static int s6e63m0_set_backlight(struct udevice *dev, int percent)
{
return 0;
}
static int s6e63m0_get_display_timing(struct udevice *dev, struct display_timing *timing)
{
struct s6e63m0_priv *priv = dev_get_priv(dev);
memcpy(timing, &priv->info->timing, sizeof(*timing));
return 0;
}
static int s6e63m0_of_to_plat(struct udevice *dev)
{
struct s6e63m0_priv *priv = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vdd3-supply", &priv->vdd3);
if (ret) {
log_debug("%s: cannot get vdd3-supply: ret = %d\n",
__func__, ret);
return ret;
}
ret = device_get_supply_regulator(dev, "vci-supply", &priv->vci);
if (ret) {
log_debug("%s: cannot get vci-supply: ret = %d\n",
__func__, ret);
return ret;
}
ret = gpio_request_by_name(dev, "reset-gpios", 0,
&priv->reset_gpio, GPIOD_IS_OUT);
if (ret) {
log_debug("%s: cannot decode reset-gpios (%d)\n",
__func__, ret);
return ret;
}
if (dev_read_bool(dev, "flip-horizontal"))
priv->gtcon |= S6E63M0_GTCON_FLAG_FLIP_H;
if (dev_read_bool(dev, "flip-vertical"))
priv->gtcon |= S6E63M0_GTCON_FLAG_FLIP_V;
return 0;
}
static int s6e63m0_hw_init(struct udevice *dev)
{
struct s6e63m0_priv *priv = dev_get_priv(dev);
int ret;
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_debug("%s: error entering reset (%d)\n", __func__, ret);
return ret;
}
ret = regulator_set_enable_if_allowed(priv->vdd3, 1);
if (ret) {
log_debug("%s: enabling vdd3-supply failed (%d)\n",
__func__, ret);
return ret;
}
mdelay(1);
ret = regulator_set_enable_if_allowed(priv->vci, 1);
if (ret) {
log_debug("%s: enabling vci-supply failed (%d)\n",
__func__, ret);
return ret;
}
mdelay(26);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_debug("%s: error exiting reset (%d)\n", __func__, ret);
return ret;
}
mdelay(10);
return 0;
}
static int s6e63m0_probe(struct udevice *dev)
{
struct s6e63m0_priv *priv = dev_get_priv(dev);
struct spi_slave *slave = dev_get_parent_priv(dev);
int ret;
if (device_get_uclass_id(dev->parent) != UCLASS_SPI)
return -EPROTONOSUPPORT;
ret = spi_claim_bus(slave);
if (ret) {
log_err("SPI bus allocation failed (%d)\n", ret);
return ret;
}
priv->info = (struct s6e63m0_info *)dev_get_driver_data(dev);
return s6e63m0_hw_init(dev);
}
static const struct panel_ops s6e63m0_ops = {
.enable_backlight = s6e63m0_enable_backlight,
.set_backlight = s6e63m0_set_backlight,
.get_display_timing = s6e63m0_get_display_timing,
};
static const struct udevice_id s6e63m0_ids[] = {
{
.compatible = "samsung,s6e63m0",
.data = (ulong)&s6e63m0_generic_info
},
{
.compatible = "samsung,bose-panel",
.data = (ulong)&samsung_bose_panel_info
},
{ }
};
U_BOOT_DRIVER(samsung_s6e63m0) = {
.name = "samsung_s6e63m0",
.id = UCLASS_PANEL,
.of_match = s6e63m0_ids,
.ops = &s6e63m0_ops,
.of_to_plat = s6e63m0_of_to_plat,
.probe = s6e63m0_probe,
.priv_auto = sizeof(struct s6e63m0_priv),
};
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