// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 Red Hat
* Copyright (C) 2015 Sony Mobile Communications Inc.
* Author: Werner Johansson <[email protected]>
*
* Based on AUO panel driver by Rob Clark <[email protected]>
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
/*
* When power is turned off to this panel a minimum off time of 500ms has to be
* observed before powering back on as there's no external reset pin. Keep
* track of earliest wakeup time and delay subsequent prepare call accordingly
*/
#define MIN_POFF_MS (500)
struct wuxga_nt_panel {
struct drm_panel base;
struct mipi_dsi_device *dsi;
struct regulator *supply;
ktime_t earliest_wake;
const struct drm_display_mode *mode;
};
static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)
{
return container_of(panel, struct wuxga_nt_panel, base);
}
static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
{
return mipi_dsi_turn_on_peripheral(wuxga_nt->dsi);
}
static int wuxga_nt_panel_disable(struct drm_panel *panel)
{
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
return mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
}
static int wuxga_nt_panel_unprepare(struct drm_panel *panel)
{
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
regulator_disable(wuxga_nt->supply);
wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);
return 0;
}
static int wuxga_nt_panel_prepare(struct drm_panel *panel)
{
struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
int ret;
s64 enablewait;
/*
* If the user re-enabled the panel before the required off-time then
* we need to wait the remaining period before re-enabling regulator
*/
enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());
/* Sanity check, this should never happen */
if (enablewait > MIN_POFF_MS)
enablewait = MIN_POFF_MS;
if (enablewait > 0)
msleep(enablewait);
ret = regulator_enable(wuxga_nt->supply);
if (ret < 0)
return ret;
/*
* A minimum delay of 250ms is required after power-up until commands
* can be sent
*/
msleep(250);
ret = wuxga_nt_panel_on(wuxga_nt);
if (ret < 0) {
dev_err(panel->dev, "failed to set panel on: %d\n", ret);
goto poweroff;
}
return 0;
poweroff:
regulator_disable(wuxga_nt->supply);
return ret;
}
static const struct drm_display_mode default_mode = {
.clock = 164402,
.hdisplay = 1920,
.hsync_start = 1920 + 152,
.hsync_end = 1920 + 152 + 52,
.htotal = 1920 + 152 + 52 + 20,
.vdisplay = 1200,
.vsync_start = 1200 + 24,
.vsync_end = 1200 + 24 + 6,
.vtotal = 1200 + 24 + 6 + 48,
};
static int wuxga_nt_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);
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = 217;
connector->display_info.height_mm = 136;
return 1;
}
static const struct drm_panel_funcs wuxga_nt_panel_funcs = {
.disable = wuxga_nt_panel_disable,
.unprepare = wuxga_nt_panel_unprepare,
.prepare = wuxga_nt_panel_prepare,
.get_modes = wuxga_nt_panel_get_modes,
};
static const struct of_device_id wuxga_nt_of_match[] = {
{ .compatible = "panasonic,vvx10f034n00", },
{ }
};
MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);
static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)
{
struct device *dev = &wuxga_nt->dsi->dev;
int ret;
wuxga_nt->mode = &default_mode;
wuxga_nt->supply = devm_regulator_get(dev, "power");
if (IS_ERR(wuxga_nt->supply))
return PTR_ERR(wuxga_nt->supply);
drm_panel_init(&wuxga_nt->base, &wuxga_nt->dsi->dev,
&wuxga_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
ret = drm_panel_of_backlight(&wuxga_nt->base);
if (ret)
return ret;
drm_panel_add(&wuxga_nt->base);
return 0;
}
static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)
{
if (wuxga_nt->base.dev)
drm_panel_remove(&wuxga_nt->base);
}
static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)
{
struct wuxga_nt_panel *wuxga_nt;
int ret;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_HSE |
MIPI_DSI_CLOCK_NON_CONTINUOUS |
MIPI_DSI_MODE_LPM;
wuxga_nt = devm_kzalloc(&dsi->dev, sizeof(*wuxga_nt), GFP_KERNEL);
if (!wuxga_nt)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, wuxga_nt);
wuxga_nt->dsi = dsi;
ret = wuxga_nt_panel_add(wuxga_nt);
if (ret < 0)
return ret;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
wuxga_nt_panel_del(wuxga_nt);
return ret;
}
return 0;
}
static void wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)
{
struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);
int ret;
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
wuxga_nt_panel_del(wuxga_nt);
}
static struct mipi_dsi_driver wuxga_nt_panel_driver = {
.driver = {
.name = "panel-panasonic-vvx10f034n00",
.of_match_table = wuxga_nt_of_match,
},
.probe = wuxga_nt_panel_probe,
.remove = wuxga_nt_panel_remove,
};
module_mipi_dsi_driver(wuxga_nt_panel_driver);
MODULE_AUTHOR("Werner Johansson <[email protected]>");
MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");
MODULE_LICENSE("GPL v2");
Codebase Browser
linux