/*
* Copyright (C) 2018 SwtcR <[email protected]>
*
* Based on Sharp ls043t1le01 panel driver by Werner Johansson <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/backlight.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <video/mipi_display.h>
struct jdi_panel {
struct drm_panel base;
struct mipi_dsi_device *dsi;
struct backlight_device *backlight;
struct regulator *supply1;
struct regulator *supply2;
struct gpio_desc *reset_gpio;
bool prepared;
bool enabled;
const struct drm_display_mode *mode;
};
struct init_cmd {
u8 cmd;
int length;
u8 data[0x40];
};
struct init_cmd init_cmds_0x10[] = {
{ 0xb9, 3, { 0xff, 0x83, 0x94 }},
{ 0xbd, 1, { 0x00 }},
{ 0xd8, 0x18, { 0xaa, 0xaa, 0xaa, 0xeb, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xeb, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xeb, 0xaa, 0xaa,
0xaa, 0xaa, 0xaa, 0xeb, 0xaa, 0xaa }},
{ 0xbd, 1, { 0x01 }},
{ 0xd8, 0x26, { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff }},
{ 0xbd, 1, { 0x02 }},
{ 0xd8, 0xe, { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff }},
{ 0xbd, 1, { 0x00 }},
{ 0xd9, 1, { 0x06 }},
{ 0xb9, 3, { 0x00, 0x00, 0x00 }},
{ 0x00, -1, { 0x00, }},
};
static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
{
return container_of(panel, struct jdi_panel, base);
}
static int jdi_panel_init(struct jdi_panel *jdi)
{
struct mipi_dsi_device *dsi = jdi->dsi;
int ret;
u8 display_id[3] = {0};
struct init_cmd *init_cmds = NULL;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
ret = mipi_dsi_set_maximum_return_packet_size(dsi, 3);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_ID, display_id,
sizeof(display_id));
if (ret < 0) {
dev_err(&dsi->dev, "failed to read panel ID: %d\n", ret);
} else {
dev_info(&dsi->dev, "display ID[%d]: %02x %02x %02x\n",
ret, display_id[0], display_id[1], display_id[2]);
}
switch (display_id[0]) {
case 0x10:
dev_info(&dsi->dev, "using init sequence for ID 0x10\n");
init_cmds = init_cmds_0x10;
break;
default:
dev_info(&dsi->dev, "unknown display, no extra init\n");
break;
}
msleep(10);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0)
return ret;
while (init_cmds && init_cmds->length != -1) {
ret = mipi_dsi_dcs_write(dsi, init_cmds->cmd, init_cmds->data,
init_cmds->length);
if (ret < 0)
return ret;
init_cmds++;
}
msleep(180);
ret = mipi_dsi_dcs_set_column_address(dsi, 0,
jdi->mode->hdisplay - 1);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_page_address(dsi, 0,
jdi->mode->vdisplay - 1);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret < 0)
return ret;
// ret = mipi_dsi_dcs_set_address_mode(dsi, false, false, false,
// false, false, false, false, false);
// if (ret < 0)
// return ret;
ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT);
if (ret < 0)
return ret;
return 0;
}
static int jdi_panel_on(struct jdi_panel *jdi)
{
struct mipi_dsi_device *dsi = jdi->dsi;
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0)
return ret;
msleep(20);
return 0;
}
static int jdi_panel_off(struct jdi_panel *jdi)
{
struct mipi_dsi_device *dsi = jdi->dsi;
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0)
return ret;
return 0;
}
static int jdi_panel_disable(struct drm_panel *panel)
{
struct jdi_panel *jdi = to_jdi_panel(panel);
if (!jdi->enabled)
return 0;
if (jdi->backlight) {
jdi->backlight->props.power = FB_BLANK_POWERDOWN;
backlight_update_status(jdi->backlight);
}
jdi->enabled = false;
return 0;
}
static int jdi_panel_unprepare(struct drm_panel *panel)
{
struct jdi_panel *jdi = to_jdi_panel(panel);
int ret;
if (!jdi->prepared)
return 0;
ret = jdi_panel_off(jdi);
if (ret < 0) {
dev_err(panel->dev, "failed to set panel off: %d\n", ret);
return ret;
}
if (jdi->reset_gpio)
gpiod_set_value(jdi->reset_gpio, 0);
msleep(10);
regulator_disable(jdi->supply2);
msleep(10);
regulator_disable(jdi->supply1);
jdi->prepared = false;
return 0;
}
static int jdi_panel_prepare(struct drm_panel *panel)
{
struct jdi_panel *jdi = to_jdi_panel(panel);
int ret;
if (jdi->prepared)
return 0;
ret = regulator_enable(jdi->supply1);
if (ret < 0)
return ret;
msleep(10);
ret = regulator_enable(jdi->supply2);
if (ret < 0)
goto poweroff1;
msleep(10);
if (jdi->reset_gpio) {
gpiod_set_value(jdi->reset_gpio, 0);
msleep(10);
gpiod_set_value(jdi->reset_gpio, 1);
msleep(60);
}
ret = jdi_panel_init(jdi);
if (ret < 0) {
dev_err(panel->dev, "failed to init panel: %d\n", ret);
goto reset;
}
ret = jdi_panel_on(jdi);
if (ret < 0) {
dev_err(panel->dev, "failed to set panel on: %d\n", ret);
goto reset;
}
jdi->prepared = true;
return 0;
reset:
if (jdi->reset_gpio)
gpiod_set_value(jdi->reset_gpio, 0);
regulator_disable(jdi->supply2);
poweroff1:
regulator_disable(jdi->supply1);
return ret;
}
static int jdi_panel_enable(struct drm_panel *panel)
{
struct jdi_panel *jdi = to_jdi_panel(panel);
if (jdi->enabled)
return 0;
if (jdi->backlight) {
jdi->backlight->props.power = FB_BLANK_UNBLANK;
backlight_update_status(jdi->backlight);
}
jdi->enabled = true;
return 0;
}
static const struct drm_display_mode default_mode = {
.clock = 78000,
.hdisplay = 720,
.hsync_start = 720 + 136,
.hsync_end = 720 + 136 + 72,
.htotal = 720 + 136 + 72 + 72,
.vdisplay = 1280,
.vsync_start = 1280 + 10,
.vsync_end = 1280 + 10 + 2,
.vtotal = 1280 + 10 + 1 + 9,
.vrefresh = 60,
};
static int jdi_panel_get_modes(struct drm_panel *panel)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh);
return -ENOMEM;
}
drm_mode_set_name(mode);
drm_mode_probed_add(panel->connector, mode);
panel->connector->display_info.width_mm = 77;
panel->connector->display_info.height_mm = 137;
return 1;
}
static const struct drm_panel_funcs jdi_panel_funcs = {
.disable = jdi_panel_disable,
.unprepare = jdi_panel_unprepare,
.prepare = jdi_panel_prepare,
.enable = jdi_panel_enable,
.get_modes = jdi_panel_get_modes,
};
static int jdi_panel_add(struct jdi_panel *jdi)
{
struct device *dev = &jdi->dsi->dev;
struct device_node *np;
int ret;
jdi->mode = &default_mode;
jdi->supply1 = devm_regulator_get(dev, "vdd1");
if (IS_ERR(jdi->supply1))
return PTR_ERR(jdi->supply1);
jdi->supply2 = devm_regulator_get(dev, "vdd2");
if (IS_ERR(jdi->supply2))
return PTR_ERR(jdi->supply2);
jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(jdi->reset_gpio)) {
dev_err(dev, "cannot get reset-gpios %ld\n",
PTR_ERR(jdi->reset_gpio));
jdi->reset_gpio = NULL;
} else {
gpiod_set_value(jdi->reset_gpio, 0);
}
np = of_parse_phandle(dev->of_node, "backlight", 0);
if (np) {
jdi->backlight = of_find_backlight_by_node(np);
of_node_put(np);
if (!jdi->backlight)
return -EPROBE_DEFER;
}
drm_panel_init(&jdi->base);
jdi->base.funcs = &jdi_panel_funcs;
jdi->base.dev = &jdi->dsi->dev;
ret = drm_panel_add(&jdi->base);
if (ret < 0)
goto put_backlight;
return 0;
put_backlight:
if (jdi->backlight)
put_device(&jdi->backlight->dev);
return ret;
}
static void jdi_panel_del(struct jdi_panel *jdi)
{
if (jdi->base.dev)
drm_panel_remove(&jdi->base);
if (jdi->backlight)
put_device(&jdi->backlight->dev);
}
static int jdi_panel_probe(struct mipi_dsi_device *dsi)
{
struct jdi_panel *jdi;
int ret;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_CLOCK_NON_CONTINUOUS |
MIPI_DSI_MODE_EOT_PACKET;
jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL);
if (!jdi)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, jdi);
jdi->dsi = dsi;
ret = jdi_panel_add(jdi);
if (ret < 0)
return ret;
return mipi_dsi_attach(dsi);
}
static int jdi_panel_remove(struct mipi_dsi_device *dsi)
{
struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
int ret;
ret = jdi_panel_disable(&jdi->base);
if (ret < 0)
dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
drm_panel_detach(&jdi->base);
jdi_panel_del(jdi);
return 0;
}
static void jdi_panel_shutdown(struct mipi_dsi_device *dsi)
{
struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi);
jdi_panel_disable(&jdi->base);
}
static const struct of_device_id jdi_of_match[] = {
{ .compatible = "jdi,lpm062m326a", },
{ }
};
MODULE_DEVICE_TABLE(of, jdi_of_match);
static struct mipi_dsi_driver jdi_panel_driver = {
.driver = {
.name = "panel-jdi-lpm062m326a",
.of_match_table = jdi_of_match,
},
.probe = jdi_panel_probe,
.remove = jdi_panel_remove,
.shutdown = jdi_panel_shutdown,
};
module_mipi_dsi_driver(jdi_panel_driver);
MODULE_AUTHOR("SwtcR <[email protected]>");
MODULE_DESCRIPTION("JDI LPM062M326A (720x1280) panel driver");
MODULE_LICENSE("GPL v2");
#define SLEEPY 2
msleep(10 * SLEEPY);
msleep(180 * SLEEPY);
msleep(20 * SLEEPY);
msleep(10 * SLEEPY);
msleep(10 * SLEEPY);
msleep(10 * SLEEPY);
msleep(10 * SLEEPY);
msleep(10 * SLEEPY);
msleep(60 * SLEEPY);