blob: 7e9682af063b63aa22bc14aa2cdd275edd0eb70a [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* i.MX drm driver - Raydium MIPI-DSI panel driver
*
* Copyright (C) 2017 NXP
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <linux/gpio/consumer.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>
/* Write Manufacture Command Set Control */
#define WRMAUCCTR 0xFE
/* Manufacturer Command Set pages (CMD2) */
struct cmd_set_entry {
u8 cmd;
u8 param;
};
/*
* There is no description in the Reference Manual about these commands.
* We received them from vendor, so just use them as is.
*/
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,
};
struct rad_panel {
struct drm_panel base;
struct mipi_dsi_device *dsi;
struct gpio_desc *reset;
struct backlight_device *backlight;
bool prepared;
bool enabled;
struct videomode vm;
u32 width_mm;
u32 height_mm;
};
static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)
{
return container_of(panel, struct rad_panel, base);
}
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 0x55;
case MIPI_DSI_FMT_RGB666:
case MIPI_DSI_FMT_RGB666_PACKED:
return 0x66;
case MIPI_DSI_FMT_RGB888:
return 0x77;
default:
return 0x77; /* for backward compatibility */
}
};
static int rad_panel_prepare(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
if (rad->prepared)
return 0;
if (rad->reset != NULL) {
gpiod_set_value(rad->reset, 0);
usleep_range(5000, 10000);
gpiod_set_value(rad->reset, 1);
usleep_range(20000, 25000);
}
rad->prepared = true;
return 0;
}
static int rad_panel_unprepare(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
struct device *dev = &rad->dsi->dev;
if (!rad->prepared)
return 0;
if (rad->enabled) {
DRM_DEV_ERROR(dev, "Panel still enabled!\n");
return -EPERM;
}
if (rad->reset != NULL) {
gpiod_set_value(rad->reset, 0);
usleep_range(15000, 17000);
gpiod_set_value(rad->reset, 1);
}
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);
u16 brightness;
int ret;
if (rad->enabled)
return 0;
if (!rad->prepared) {
DRM_DEV_ERROR(dev, "Panel not prepared!\n");
return -EPERM;
}
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
ret = rad_panel_push_cmd_list(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to send MCS (%d)\n", ret);
goto fail;
}
/* Select User Command Set table (CMD1) */
ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);
if (ret < 0)
goto fail;
/* Software reset */
ret = mipi_dsi_dcs_soft_reset(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to do Software Reset (%d)\n", ret);
goto fail;
}
usleep_range(15000, 17000);
/* Set DSI mode */
ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set DSI mode (%d)\n", ret);
goto fail;
}
/* Set tear ON */
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set tear ON (%d)\n", ret);
goto fail;
}
/* Set tear scanline */
ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set tear scanline (%d)\n", ret);
goto fail;
}
/* Set pixel format */
ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);
DRM_DEV_DEBUG_DRIVER(dev, "Interface color format set to 0x%x\n",
color_format);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set pixel format (%d)\n", ret);
goto fail;
}
/* Set display brightness */
brightness = rad->backlight->props.brightness;
ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set display brightness (%d)\n",
ret);
goto fail;
}
/* Exit sleep mode */
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to exit sleep mode (%d)\n", ret);
goto fail;
}
usleep_range(5000, 10000);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to set display ON (%d)\n", ret);
goto fail;
}
backlight_enable(rad->backlight);
rad->enabled = true;
return 0;
fail:
if (rad->reset != NULL)
gpiod_set_value(rad->reset, 0);
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;
if (!rad->enabled)
return 0;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
backlight_disable(rad->backlight);
usleep_range(10000, 15000);
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0) {
DRM_DEV_ERROR(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) {
DRM_DEV_ERROR(dev, "Failed to enter sleep mode (%d)\n", ret);
return ret;
}
rad->enabled = false;
return 0;
}
static int rad_panel_get_modes(struct drm_panel *panel)
{
struct rad_panel *rad = to_rad_panel(panel);
struct device *dev = &rad->dsi->dev;
struct drm_connector *connector = panel->connector;
struct drm_display_mode *mode;
u32 *bus_flags = &connector->display_info.bus_flags;
int ret;
mode = drm_mode_create(connector->dev);
if (!mode) {
DRM_DEV_ERROR(dev, "Failed to create display mode!\n");
return 0;
}
drm_display_mode_from_videomode(&rad->vm, mode);
mode->width_mm = rad->width_mm;
mode->height_mm = rad->height_mm;
connector->display_info.width_mm = rad->width_mm;
connector->display_info.height_mm = rad->height_mm;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
if (rad->vm.flags & DISPLAY_FLAGS_DE_HIGH)
*bus_flags |= DRM_BUS_FLAG_DE_HIGH;
if (rad->vm.flags & DISPLAY_FLAGS_DE_LOW)
*bus_flags |= DRM_BUS_FLAG_DE_LOW;
if (rad->vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
*bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
if (rad->vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
*bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
ret = drm_display_info_set_bus_formats(&connector->display_info,
rad_bus_formats, ARRAY_SIZE(rad_bus_formats));
if (ret)
return ret;
drm_mode_probed_add(panel->connector, mode);
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);
struct device *dev = &dsi->dev;
u16 brightness;
int ret;
if (!rad->prepared)
return 0;
DRM_DEV_DEBUG_DRIVER(dev, "\n");
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);
struct device *dev = &dsi->dev;
int ret = 0;
if (!rad->prepared)
return 0;
DRM_DEV_DEBUG_DRIVER(dev, "New brightness: %d\n", bl->props.brightness);
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,
};
/*
* The clock might range from 66MHz (30Hz refresh rate)
* to 132MHz (60Hz refresh rate)
*/
static const struct display_timing rad_default_timing = {
.pixelclock = { 66000000, 132000000, 132000000 },
.hactive = { 1080, 1080, 1080 },
.hfront_porch = { 20, 20, 20 },
.hsync_len = { 2, 2, 2 },
.hback_porch = { 34, 34, 34 },
.vactive = { 1920, 1920, 1920 },
.vfront_porch = { 10, 10, 10 },
.vsync_len = { 2, 2, 2 },
.vback_porch = { 4, 4, 4 },
.flags = DISPLAY_FLAGS_HSYNC_LOW |
DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_LOW |
DISPLAY_FLAGS_PIXDATA_NEGEDGE,
};
static int rad_panel_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct device_node *np = dev->of_node;
struct device_node *timings;
struct rad_panel *panel;
struct backlight_properties bl_props;
int ret;
u32 video_mode;
panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
if (!panel)
return -ENOMEM;
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 |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
ret = of_property_read_u32(np, "video-mode", &video_mode);
if (!ret) {
switch (video_mode) {
case 0:
/* burst mode */
dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;
break;
case 1:
/* non-burst mode with sync event */
break;
case 2:
/* non-burst mode with sync pulse */
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 < 0) {
dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);
return ret;
}
/*
* 'display-timings' is optional, so verify if the node is present
* before calling of_get_videomode so we won't get console error
* messages
*/
timings = of_get_child_by_name(np, "display-timings");
if (timings) {
of_node_put(timings);
ret = of_get_videomode(np, &panel->vm, 0);
} else {
videomode_from_timing(&rad_default_timing, &panel->vm);
}
if (ret < 0)
return ret;
of_property_read_u32(np, "panel-width-mm", &panel->width_mm);
of_property_read_u32(np, "panel-height-mm", &panel->height_mm);
panel->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(panel->reset))
panel->reset = NULL;
else
gpiod_set_value(panel->reset, 0);
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;
}
drm_panel_init(&panel->base);
panel->base.funcs = &rad_panel_funcs;
panel->base.dev = dev;
dev_set_drvdata(dev, panel);
ret = drm_panel_add(&panel->base);
if (ret < 0)
return ret;
ret = mipi_dsi_attach(dsi);
if (ret < 0)
drm_panel_remove(&panel->base);
return ret;
}
static int 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 < 0)
DRM_DEV_ERROR(dev, "Failed to detach from host (%d)\n",
ret);
drm_panel_remove(&rad->base);
return 0;
}
static void rad_panel_shutdown(struct mipi_dsi_device *dsi)
{
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
rad_panel_disable(&rad->base);
rad_panel_unprepare(&rad->base);
}
#ifdef CONFIG_PM
static int rad_panel_suspend(struct device *dev)
{
struct rad_panel *rad = dev_get_drvdata(dev);
if (!rad->reset)
return 0;
devm_gpiod_put(dev, rad->reset);
rad->reset = NULL;
return 0;
}
static int rad_panel_resume(struct device *dev)
{
struct rad_panel *rad = dev_get_drvdata(dev);
if (rad->reset)
return 0;
rad->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(rad->reset))
rad->reset = NULL;
return PTR_ERR_OR_ZERO(rad->reset);
}
#endif
static const struct dev_pm_ops rad_pm_ops = {
SET_RUNTIME_PM_OPS(rad_panel_suspend, rad_panel_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(rad_panel_suspend, rad_panel_resume)
};
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,
.pm = &rad_pm_ops,
},
.probe = rad_panel_probe,
.remove = rad_panel_remove,
.shutdown = rad_panel_shutdown,
};
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");