#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <video/of_videomode.h>
#include <video/videomode.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#define COL_FMT_16BPP 0x55
#define COL_FMT_18BPP 0x66
#define COL_FMT_24BPP 0x77
#define WRMAUCCTR 0xFE
struct cmd_set_entry {
u8 cmd;
u8 param;
};
static const struct cmd_set_entry manufacturer_cmd_set[] = {
{0xFE, 0x0B},
{0x28, 0x40},
{0x29, 0x4F},
{0xFE, 0x0E},
{0x4B, 0x00},
{0x4C, 0x0F},
{0x4D, 0x20},
{0x4E, 0x40},
{0x4F, 0x60},
{0x50, 0xA0},
{0x51, 0xC0},
{0x52, 0xE0},
{0x53, 0xFF},
{0xFE, 0x0D},
{0x18, 0x08},
{0x42, 0x00},
{0x08, 0x41},
{0x46, 0x02},
{0x72, 0x09},
{0xFE, 0x0A},
{0x24, 0x17},
{0x04, 0x07},
{0x1A, 0x0C},
{0x0F, 0x44},
{0xFE, 0x04},
{0x00, 0x0C},
{0x05, 0x08},
{0x06, 0x08},
{0x08, 0x08},
{0x09, 0x08},
{0x0A, 0xE6},
{0x0B, 0x8C},
{0x1A, 0x12},
{0x1E, 0xE0},
{0x29, 0x93},
{0x2A, 0x93},
{0x2F, 0x02},
{0x31, 0x02},
{0x33, 0x05},
{0x37, 0x2D},
{0x38, 0x2D},
{0x3A, 0x1E},
{0x3B, 0x1E},
{0x3D, 0x27},
{0x3F, 0x80},
{0x40, 0x40},
{0x41, 0xE0},
{0x4F, 0x2F},
{0x50, 0x1E},
{0xFE, 0x06},
{0x00, 0xCC},
{0x05, 0x05},
{0x07, 0xA2},
{0x08, 0xCC},
{0x0D, 0x03},
{0x0F, 0xA2},
{0x32, 0xCC},
{0x37, 0x05},
{0x39, 0x83},
{0x3A, 0xCC},
{0x41, 0x04},
{0x43, 0x83},
{0x44, 0xCC},
{0x49, 0x05},
{0x4B, 0xA2},
{0x4C, 0xCC},
{0x51, 0x03},
{0x53, 0xA2},
{0x75, 0xCC},
{0x7A, 0x03},
{0x7C, 0x83},
{0x7D, 0xCC},
{0x82, 0x02},
{0x84, 0x83},
{0x85, 0xEC},
{0x86, 0x0F},
{0x87, 0xFF},
{0x88, 0x00},
{0x8A, 0x02},
{0x8C, 0xA2},
{0x8D, 0xEA},
{0x8E, 0x01},
{0x8F, 0xE8},
{0xFE, 0x06},
{0x90, 0x0A},
{0x92, 0x06},
{0x93, 0xA0},
{0x94, 0xA8},
{0x95, 0xEC},
{0x96, 0x0F},
{0x97, 0xFF},
{0x98, 0x00},
{0x9A, 0x02},
{0x9C, 0xA2},
{0xAC, 0x04},
{0xFE, 0x06},
{0xB1, 0x12},
{0xB2, 0x17},
{0xB3, 0x17},
{0xB4, 0x17},
{0xB5, 0x17},
{0xB6, 0x11},
{0xB7, 0x08},
{0xB8, 0x09},
{0xB9, 0x06},
{0xBA, 0x07},
{0xBB, 0x17},
{0xBC, 0x17},
{0xBD, 0x17},
{0xBE, 0x17},
{0xBF, 0x17},
{0xC0, 0x17},
{0xC1, 0x17},
{0xC2, 0x17},
{0xC3, 0x17},
{0xC4, 0x0F},
{0xC5, 0x0E},
{0xC6, 0x00},
{0xC7, 0x01},
{0xC8, 0x10},
{0xFE, 0x06},
{0x95, 0xEC},
{0x8D, 0xEE},
{0x44, 0xEC},
{0x4C, 0xEC},
{0x32, 0xEC},
{0x3A, 0xEC},
{0x7D, 0xEC},
{0x75, 0xEC},
{0x00, 0xEC},
{0x08, 0xEC},
{0x85, 0xEC},
{0xA6, 0x21},
{0xA7, 0x05},
{0xA9, 0x06},
{0x82, 0x06},
{0x41, 0x06},
{0x7A, 0x07},
{0x37, 0x07},
{0x05, 0x06},
{0x49, 0x06},
{0x0D, 0x04},
{0x51, 0x04},
};
static const u32 rad_bus_formats[] = {
MEDIA_BUS_FMT_RGB888_1X24,
MEDIA_BUS_FMT_RGB666_1X18,
MEDIA_BUS_FMT_RGB565_1X16,
};
static const u32 rad_bus_flags = DRM_BUS_FLAG_DE_LOW |
DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
struct rad_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct gpio_desc *reset;
struct backlight_device *backlight;
struct regulator_bulk_data *supplies;
unsigned int num_supplies;
bool prepared;
};
static const struct drm_display_mode default_mode = {
.clock = 132000,
.hdisplay = 1080,
.hsync_start = 1080 + 20,
.hsync_end = 1080 + 20 + 2,
.htotal = 1080 + 20 + 2 + 34,
.vdisplay = 1920,
.vsync_start = 1920 + 10,
.vsync_end = 1920 + 10 + 2,
.vtotal = 1920 + 10 + 2 + 4,
.width_mm = 68,
.height_mm = 121,
.flags = DRM_MODE_FLAG_NHSYNC |
DRM_MODE_FLAG_NVSYNC,
};
static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)
{
return container_of(panel, struct rad_panel, panel);
}
static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)
{
size_t i;
size_t count = ARRAY_SIZE(manufacturer_cmd_set);
int ret = 0;
for (i = 0; i < count; i++) {
const struct cmd_set_entry *entry = &manufacturer_cmd_set[i];
u8 buffer[2] = { entry->cmd, entry->param };
ret = mipi_dsi_generic_write(dsi, &buffer, sizeof(buffer));
if (ret < 0)
return ret;
}
return ret;
};
static int color_format_from_dsi_format(enum mipi_dsi_pixel_format format)
{
switch (format) {
case MIPI_DSI_FMT_RGB565:
return COL_FMT_16BPP;
case MIPI_DSI_FMT_RGB666:
case MIPI_DSI_FMT_RGB666_PACKED:
return COL_FMT_18BPP;
case MIPI_DSI_FMT_RGB888:
return COL_FMT_24BPP;
default:
return COL_FMT_24BPP;
}
};
static int rad_panel_prepare(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
int ret;
ret = regulator_bulk_enable(rad->num_supplies, rad->supplies);
if (ret)
return ret;
if (rad->reset) {
gpiod_set_value_cansleep(rad->reset, 1);
usleep_range(3000, 5000);
gpiod_set_value_cansleep(rad->reset, 0);
usleep_range(18000, 20000);
}
rad->prepared = true;
return 0;
}
static int rad_panel_unprepare(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
int ret;
if (rad->reset) {
gpiod_set_value_cansleep(rad->reset, 1);
usleep_range(15000, 17000);
gpiod_set_value_cansleep(rad->reset, 0);
}
ret = regulator_bulk_disable(rad->num_supplies, rad->supplies);
if (ret)
return ret;
rad->prepared = false;
return 0;
}
static int rad_panel_enable(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
struct mipi_dsi_device *dsi = rad->dsi;
struct device *dev = &dsi->dev;
int color_format = color_format_from_dsi_format(dsi->format);
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
ret = rad_panel_push_cmd_list(dsi);
if (ret < 0) {
dev_err(dev, "Failed to send MCS (%d)\n", ret);
goto fail;
}
ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);
if (ret < 0)
goto fail;
ret = mipi_dsi_dcs_soft_reset(dsi);
if (ret < 0) {
dev_err(dev, "Failed to do Software Reset (%d)\n", ret);
goto fail;
}
usleep_range(15000, 17000);
ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);
if (ret < 0) {
dev_err(dev, "Failed to set DSI mode (%d)\n", ret);
goto fail;
}
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret < 0) {
dev_err(dev, "Failed to set tear ON (%d)\n", ret);
goto fail;
}
ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);
if (ret < 0) {
dev_err(dev, "Failed to set tear scanline (%d)\n", ret);
goto fail;
}
ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);
dev_dbg(dev, "Interface color format set to 0x%x\n", color_format);
if (ret < 0) {
dev_err(dev, "Failed to set pixel format (%d)\n", ret);
goto fail;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
goto fail;
}
usleep_range(5000, 7000);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display ON (%d)\n", ret);
goto fail;
}
backlight_enable(rad->backlight);
return 0;
fail:
gpiod_set_value_cansleep(rad->reset, 1);
return ret;
}
static int rad_panel_disable(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
struct mipi_dsi_device *dsi = rad->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
backlight_disable(rad->backlight);
usleep_range(10000, 12000);
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display OFF (%d)\n", ret);
return ret;
}
usleep_range(5000, 10000);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
return ret;
}
return 0;
}
static int rad_panel_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
drm_mode_vrefresh(&default_mode));
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
connector->display_info.bus_flags = rad_bus_flags;
drm_display_info_set_bus_formats(&connector->display_info,
rad_bus_formats,
ARRAY_SIZE(rad_bus_formats));
return 1;
}
static int rad_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
u16 brightness;
int ret;
if (!rad->prepared)
return 0;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
if (ret < 0)
return ret;
bl->props.brightness = brightness;
return brightness & 0xff;
}
static int rad_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
int ret = 0;
if (!rad->prepared)
return 0;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
if (ret < 0)
return ret;
return 0;
}
static const struct backlight_ops rad_bl_ops = {
.update_status = rad_bl_update_status,
.get_brightness = rad_bl_get_brightness,
};
static const struct drm_panel_funcs rad_panel_funcs = {
.prepare = rad_panel_prepare,
.unprepare = rad_panel_unprepare,
.enable = rad_panel_enable,
.disable = rad_panel_disable,
.get_modes = rad_panel_get_modes,
};
static const char * const rad_supply_names[] = {
"v3p3",
"v1p8",
};
static int rad_init_regulators(struct rad_panel *rad)
{
struct device *dev = &rad->dsi->dev;
int i;
rad->num_supplies = ARRAY_SIZE(rad_supply_names);
rad->supplies = devm_kcalloc(dev, rad->num_supplies,
sizeof(*rad->supplies), GFP_KERNEL);
if (!rad->supplies)
return -ENOMEM;
for (i = 0; i < rad->num_supplies; i++)
rad->supplies[i].supply = rad_supply_names[i];
return devm_regulator_bulk_get(dev, rad->num_supplies, rad->supplies);
};
static int rad_panel_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct device_node *np = dev->of_node;
struct rad_panel *panel;
struct backlight_properties bl_props;
int ret;
u32 video_mode;
panel = devm_drm_panel_alloc(dev, struct rad_panel, panel,
&rad_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(panel))
return PTR_ERR(panel);
mipi_dsi_set_drvdata(dsi, panel);
panel->dsi = dsi;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO;
ret = of_property_read_u32(np, "video-mode", &video_mode);
if (!ret) {
switch (video_mode) {
case 0:
dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;
break;
case 1:
break;
case 2:
dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
break;
default:
dev_warn(dev, "invalid video mode %d\n", video_mode);
break;
}
}
ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);
if (ret) {
dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);
return ret;
}
panel->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(panel->reset))
return PTR_ERR(panel->reset);
memset(&bl_props, 0, sizeof(bl_props));
bl_props.type = BACKLIGHT_RAW;
bl_props.brightness = 255;
bl_props.max_brightness = 255;
panel->backlight = devm_backlight_device_register(dev, dev_name(dev),
dev, dsi, &rad_bl_ops,
&bl_props);
if (IS_ERR(panel->backlight)) {
ret = PTR_ERR(panel->backlight);
dev_err(dev, "Failed to register backlight (%d)\n", ret);
return ret;
}
ret = rad_init_regulators(panel);
if (ret)
return ret;
dev_set_drvdata(dev, panel);
drm_panel_add(&panel->panel);
ret = mipi_dsi_attach(dsi);
if (ret)
drm_panel_remove(&panel->panel);
return ret;
}
static void rad_panel_remove(struct mipi_dsi_device *dsi)
{
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
struct device *dev = &dsi->dev;
int ret;
ret = mipi_dsi_detach(dsi);
if (ret)
dev_err(dev, "Failed to detach from host (%d)\n", ret);
drm_panel_remove(&rad->panel);
}
static const struct of_device_id rad_of_match[] = {
{ .compatible = "raydium,rm67191", },
{ }
};
MODULE_DEVICE_TABLE(of, rad_of_match);
static struct mipi_dsi_driver rad_panel_driver = {
.driver = {
.name = "panel-raydium-rm67191",
.of_match_table = rad_of_match,
},
.probe = rad_panel_probe,
.remove = rad_panel_remove,
};
module_mipi_dsi_driver(rad_panel_driver);
MODULE_AUTHOR("Robert Chiras <robert.chiras@nxp.com>");
MODULE_DESCRIPTION("DRM Driver for Raydium RM67191 MIPI DSI panel");
MODULE_LICENSE("GPL v2");
