Release 4.17 drivers/gpu/drm/panel/panel-innolux-p079zca.c
/*
* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
*
* 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.
*/
#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 innolux_panel {
struct drm_panel base;
struct mipi_dsi_device *link;
struct backlight_device *backlight;
struct regulator *supply;
struct gpio_desc *enable_gpio;
bool prepared;
bool enabled;
};
static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel)
{
return container_of(panel, struct innolux_panel, base);
}
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static int innolux_panel_disable(struct drm_panel *panel)
{
struct innolux_panel *innolux = to_innolux_panel(panel);
int err;
if (!innolux->enabled)
return 0;
backlight_disable(innolux->backlight);
err = mipi_dsi_dcs_set_display_off(innolux->link);
if (err < 0)
DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
err);
innolux->enabled = false;
return 0;
}
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static int innolux_panel_unprepare(struct drm_panel *panel)
{
struct innolux_panel *innolux = to_innolux_panel(panel);
int err;
if (!innolux->prepared)
return 0;
err = mipi_dsi_dcs_enter_sleep_mode(innolux->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
err);
return err;
}
gpiod_set_value_cansleep(innolux->enable_gpio, 0);
/* T8: 80ms - 1000ms */
msleep(80);
err = regulator_disable(innolux->supply);
if (err < 0)
return err;
innolux->prepared = false;
return 0;
}
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static int innolux_panel_prepare(struct drm_panel *panel)
{
struct innolux_panel *innolux = to_innolux_panel(panel);
int err, regulator_err;
if (innolux->prepared)
return 0;
gpiod_set_value_cansleep(innolux->enable_gpio, 0);
err = regulator_enable(innolux->supply);
if (err < 0)
return err;
/* T2: 15ms - 1000ms */
usleep_range(15000, 16000);
gpiod_set_value_cansleep(innolux->enable_gpio, 1);
/* T4: 15ms - 1000ms */
usleep_range(15000, 16000);
err = mipi_dsi_dcs_exit_sleep_mode(innolux->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
err);
goto poweroff;
}
/* T6: 120ms - 1000ms*/
msleep(120);
err = mipi_dsi_dcs_set_display_on(innolux->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
err);
goto poweroff;
}
/* T7: 5ms */
usleep_range(5000, 6000);
innolux->prepared = true;
return 0;
poweroff:
regulator_err = regulator_disable(innolux->supply);
if (regulator_err)
DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
regulator_err);
gpiod_set_value_cansleep(innolux->enable_gpio, 0);
return err;
}
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static int innolux_panel_enable(struct drm_panel *panel)
{
struct innolux_panel *innolux = to_innolux_panel(panel);
int ret;
if (innolux->enabled)
return 0;
ret = backlight_enable(innolux->backlight);
if (ret) {
DRM_DEV_ERROR(panel->drm->dev,
"Failed to enable backlight %d\n", ret);
return ret;
}
innolux->enabled = true;
return 0;
}
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static const struct drm_display_mode default_mode = {
.clock = 56900,
.hdisplay = 768,
.hsync_start = 768 + 40,
.hsync_end = 768 + 40 + 40,
.htotal = 768 + 40 + 40 + 40,
.vdisplay = 1024,
.vsync_start = 1024 + 20,
.vsync_end = 1024 + 20 + 4,
.vtotal = 1024 + 20 + 4 + 20,
.vrefresh = 60,
};
static int innolux_panel_get_modes(struct drm_panel *panel)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
DRM_DEV_ERROR(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 = 120;
panel->connector->display_info.height_mm = 160;
panel->connector->display_info.bpc = 8;
return 1;
}
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static const struct drm_panel_funcs innolux_panel_funcs = {
.disable = innolux_panel_disable,
.unprepare = innolux_panel_unprepare,
.prepare = innolux_panel_prepare,
.enable = innolux_panel_enable,
.get_modes = innolux_panel_get_modes,
};
static const struct of_device_id innolux_of_match[] = {
{ .compatible = "innolux,p079zca", },
{ }
};
MODULE_DEVICE_TABLE(of, innolux_of_match);
static int innolux_panel_add(struct innolux_panel *innolux)
{
struct device *dev = &innolux->link->dev;
int err;
innolux->supply = devm_regulator_get(dev, "power");
if (IS_ERR(innolux->supply))
return PTR_ERR(innolux->supply);
innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable",
GPIOD_OUT_HIGH);
if (IS_ERR(innolux->enable_gpio)) {
err = PTR_ERR(innolux->enable_gpio);
dev_dbg(dev, "failed to get enable gpio: %d\n", err);
innolux->enable_gpio = NULL;
}
innolux->backlight = devm_of_find_backlight(dev);
if (IS_ERR(innolux->backlight))
return PTR_ERR(innolux->backlight);
drm_panel_init(&innolux->base);
innolux->base.funcs = &innolux_panel_funcs;
innolux->base.dev = &innolux->link->dev;
return drm_panel_add(&innolux->base);
}
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static void innolux_panel_del(struct innolux_panel *innolux)
{
if (innolux->base.dev)
drm_panel_remove(&innolux->base);
}
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static int innolux_panel_probe(struct mipi_dsi_device *dsi)
{
struct innolux_panel *innolux;
int err;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_MODE_LPM;
innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL);
if (!innolux)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, innolux);
innolux->link = dsi;
err = innolux_panel_add(innolux);
if (err < 0)
return err;
err = mipi_dsi_attach(dsi);
return err;
}
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static int innolux_panel_remove(struct mipi_dsi_device *dsi)
{
struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
int err;
err = innolux_panel_unprepare(&innolux->base);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
err);
err = innolux_panel_disable(&innolux->base);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
err = mipi_dsi_detach(dsi);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
err);
drm_panel_detach(&innolux->base);
innolux_panel_del(innolux);
return 0;
}
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static void innolux_panel_shutdown(struct mipi_dsi_device *dsi)
{
struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi);
innolux_panel_unprepare(&innolux->base);
innolux_panel_disable(&innolux->base);
}
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static struct mipi_dsi_driver innolux_panel_driver = {
.driver = {
.name = "panel-innolux-p079zca",
.of_match_table = innolux_of_match,
},
.probe = innolux_panel_probe,
.remove = innolux_panel_remove,
.shutdown = innolux_panel_shutdown,
};
module_mipi_dsi_driver(innolux_panel_driver);
MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
MODULE_DESCRIPTION("Innolux P079ZCA panel driver");
MODULE_LICENSE("GPL v2");
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