// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct visionox_rm69299 {
struct drm_panel panel;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
struct mipi_dsi_device *dsi;
};
static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
{
return container_of(panel, struct visionox_rm69299, panel);
}
static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
/*
* Reset sequence of visionox panel requires the panel to be
* out of reset for 10ms, followed by being held in reset
* for 10ms and then out again
*/
gpiod_set_value(ctx->reset_gpio, 1);
usleep_range(10000, 20000);
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(10000, 20000);
gpiod_set_value(ctx->reset_gpio, 1);
usleep_range(10000, 20000);
return 0;
}
static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
{
gpiod_set_value(ctx->reset_gpio, 0);
return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
static int visionox_rm69299_unprepare(struct drm_panel *panel)
{
struct visionox_rm69299 *ctx = panel_to_ctx(panel);
int ret;
ctx->dsi->mode_flags = 0;
ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
if (ret < 0)
dev_err(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);
/* 120ms delay required here as per DCS spec */
msleep(120);
ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
if (ret < 0) {
dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);
}
ret = visionox_rm69299_power_off(ctx);
return ret;
}
static int visionox_rm69299_prepare(struct drm_panel *panel)
{
struct visionox_rm69299 *ctx = panel_to_ctx(panel);
int ret;
ret = visionox_rm69299_power_on(ctx);
if (ret < 0)
return ret;
ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
if (ret < 0) {
dev_err(ctx->panel.dev, "cmd set tx 0 failed, ret = %d\n", ret);
goto power_off;
}
ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
if (ret < 0) {
dev_err(ctx->panel.dev, "cmd set tx 1 failed, ret = %d\n", ret);
goto power_off;
}
ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
if (ret < 0) {
dev_err(ctx->panel.dev, "cmd set tx 2 failed, ret = %d\n", ret);
goto power_off;
}
ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
if (ret < 0) {
dev_err(ctx->panel.dev, "cmd set tx 3 failed, ret = %d\n", ret);
goto power_off;
}
ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
if (ret < 0) {
dev_err(ctx->panel.dev, "exit_sleep_mode cmd failed ret = %d\n", ret);
goto power_off;
}
/* Per DSI spec wait 120ms after sending exit sleep DCS command */
msleep(120);
ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
if (ret < 0) {
dev_err(ctx->panel.dev, "set_display_on cmd failed ret = %d\n", ret);
goto power_off;
}
/* Per DSI spec wait 120ms after sending set_display_on DCS command */
msleep(120);
return 0;
power_off:
return ret;
}
static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
.name = "1080x2248",
.clock = 158695,
.hdisplay = 1080,
.hsync_start = 1080 + 26,
.hsync_end = 1080 + 26 + 2,
.htotal = 1080 + 26 + 2 + 36,
.vdisplay = 2248,
.vsync_start = 2248 + 56,
.vsync_end = 2248 + 56 + 4,
.vtotal = 2248 + 56 + 4 + 4,
.flags = 0,
};
static int visionox_rm69299_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct visionox_rm69299 *ctx = panel_to_ctx(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev,
&visionox_rm69299_1080x2248_60hz);
if (!mode) {
dev_err(ctx->panel.dev, "failed to create a new display mode\n");
return 0;
}
connector->display_info.width_mm = 74;
connector->display_info.height_mm = 131;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
.unprepare = visionox_rm69299_unprepare,
.prepare = visionox_rm69299_prepare,
.get_modes = visionox_rm69299_get_modes,
};
static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct visionox_rm69299 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, ctx);
ctx->panel.dev = dev;
ctx->dsi = dsi;
ctx->supplies[0].supply = "vdda";
ctx->supplies[0].init_load_uA = 32000;
ctx->supplies[1].supply = "vdd3p3";
ctx->supplies[1].init_load_uA = 13200;
ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0)
return ret;
ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
"reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
return PTR_ERR(ctx->reset_gpio);
}
drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->panel.dev = dev;
ctx->panel.funcs = &visionox_rm69299_drm_funcs;
drm_panel_add(&ctx->panel);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "dsi attach failed ret = %d\n", ret);
goto err_dsi_attach;
}
return 0;
err_dsi_attach:
drm_panel_remove(&ctx->panel);
return ret;
}
static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)
{
struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(ctx->dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id visionox_rm69299_of_match[] = {
{ .compatible = "visionox,rm69299-1080p-display", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
static struct mipi_dsi_driver visionox_rm69299_driver = {
.driver = {
.name = "panel-visionox-rm69299",
.of_match_table = visionox_rm69299_of_match,
},
.probe = visionox_rm69299_probe,
.remove = visionox_rm69299_remove,
};
module_mipi_dsi_driver(visionox_rm69299_driver);
MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
MODULE_LICENSE("GPL v2");
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