linux/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
Christophe Branchereau 49956b505c
drm/panel: Add panel driver for NewVision NV3052C based LCDs
This driver supports the NewVision NV3052C based LCDs. Right now, it
only supports the LeadTek LTK035C5444T 2.4" 640x480 TFT LCD panel, which
can be found in the Anbernic RG-350M handheld console.

Signed-off-by: Christophe Branchereau <cbranchereau@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
[pcercuei: Change msleep(5) to usleep_range(5000, 20000)]
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220321133651.291592-3-cbranchereau@gmail.com
2022-04-05 21:41:36 +01:00

485 lines
10 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* NewVision NV3052C IPS LCD panel driver
*
* Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
* Copyright (C) 2022, Christophe Branchereau <cbranchereau@gmail.com>
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct nv3052c_panel_info {
const struct drm_display_mode *display_modes;
unsigned int num_modes;
u16 width_mm, height_mm;
u32 bus_format, bus_flags;
};
struct nv3052c {
struct device *dev;
struct drm_panel panel;
struct mipi_dbi dbi;
const struct nv3052c_panel_info *panel_info;
struct regulator *supply;
struct gpio_desc *reset_gpio;
};
struct nv3052c_reg {
u8 cmd;
u8 val;
};
static const struct nv3052c_reg nv3052c_panel_regs[] = {
{ 0xff, 0x30 },
{ 0xff, 0x52 },
{ 0xff, 0x01 },
{ 0xe3, 0x00 },
{ 0x40, 0x00 },
{ 0x03, 0x40 },
{ 0x04, 0x00 },
{ 0x05, 0x03 },
{ 0x08, 0x00 },
{ 0x09, 0x07 },
{ 0x0a, 0x01 },
{ 0x0b, 0x32 },
{ 0x0c, 0x32 },
{ 0x0d, 0x0b },
{ 0x0e, 0x00 },
{ 0x23, 0xa0 },
{ 0x24, 0x0c },
{ 0x25, 0x06 },
{ 0x26, 0x14 },
{ 0x27, 0x14 },
{ 0x38, 0xcc },
{ 0x39, 0xd7 },
{ 0x3a, 0x4a },
{ 0x28, 0x40 },
{ 0x29, 0x01 },
{ 0x2a, 0xdf },
{ 0x49, 0x3c },
{ 0x91, 0x77 },
{ 0x92, 0x77 },
{ 0xa0, 0x55 },
{ 0xa1, 0x50 },
{ 0xa4, 0x9c },
{ 0xa7, 0x02 },
{ 0xa8, 0x01 },
{ 0xa9, 0x01 },
{ 0xaa, 0xfc },
{ 0xab, 0x28 },
{ 0xac, 0x06 },
{ 0xad, 0x06 },
{ 0xae, 0x06 },
{ 0xaf, 0x03 },
{ 0xb0, 0x08 },
{ 0xb1, 0x26 },
{ 0xb2, 0x28 },
{ 0xb3, 0x28 },
{ 0xb4, 0x33 },
{ 0xb5, 0x08 },
{ 0xb6, 0x26 },
{ 0xb7, 0x08 },
{ 0xb8, 0x26 },
{ 0xf0, 0x00 },
{ 0xf6, 0xc0 },
{ 0xff, 0x30 },
{ 0xff, 0x52 },
{ 0xff, 0x02 },
{ 0xb0, 0x0b },
{ 0xb1, 0x16 },
{ 0xb2, 0x17 },
{ 0xb3, 0x2c },
{ 0xb4, 0x32 },
{ 0xb5, 0x3b },
{ 0xb6, 0x29 },
{ 0xb7, 0x40 },
{ 0xb8, 0x0d },
{ 0xb9, 0x05 },
{ 0xba, 0x12 },
{ 0xbb, 0x10 },
{ 0xbc, 0x12 },
{ 0xbd, 0x15 },
{ 0xbe, 0x19 },
{ 0xbf, 0x0e },
{ 0xc0, 0x16 },
{ 0xc1, 0x0a },
{ 0xd0, 0x0c },
{ 0xd1, 0x17 },
{ 0xd2, 0x14 },
{ 0xd3, 0x2e },
{ 0xd4, 0x32 },
{ 0xd5, 0x3c },
{ 0xd6, 0x22 },
{ 0xd7, 0x3d },
{ 0xd8, 0x0d },
{ 0xd9, 0x07 },
{ 0xda, 0x13 },
{ 0xdb, 0x13 },
{ 0xdc, 0x11 },
{ 0xdd, 0x15 },
{ 0xde, 0x19 },
{ 0xdf, 0x10 },
{ 0xe0, 0x17 },
{ 0xe1, 0x0a },
{ 0xff, 0x30 },
{ 0xff, 0x52 },
{ 0xff, 0x03 },
{ 0x00, 0x2a },
{ 0x01, 0x2a },
{ 0x02, 0x2a },
{ 0x03, 0x2a },
{ 0x04, 0x61 },
{ 0x05, 0x80 },
{ 0x06, 0xc7 },
{ 0x07, 0x01 },
{ 0x08, 0x03 },
{ 0x09, 0x04 },
{ 0x70, 0x22 },
{ 0x71, 0x80 },
{ 0x30, 0x2a },
{ 0x31, 0x2a },
{ 0x32, 0x2a },
{ 0x33, 0x2a },
{ 0x34, 0x61 },
{ 0x35, 0xc5 },
{ 0x36, 0x80 },
{ 0x37, 0x23 },
{ 0x40, 0x03 },
{ 0x41, 0x04 },
{ 0x42, 0x05 },
{ 0x43, 0x06 },
{ 0x44, 0x11 },
{ 0x45, 0xe8 },
{ 0x46, 0xe9 },
{ 0x47, 0x11 },
{ 0x48, 0xea },
{ 0x49, 0xeb },
{ 0x50, 0x07 },
{ 0x51, 0x08 },
{ 0x52, 0x09 },
{ 0x53, 0x0a },
{ 0x54, 0x11 },
{ 0x55, 0xec },
{ 0x56, 0xed },
{ 0x57, 0x11 },
{ 0x58, 0xef },
{ 0x59, 0xf0 },
{ 0xb1, 0x01 },
{ 0xb4, 0x15 },
{ 0xb5, 0x16 },
{ 0xb6, 0x09 },
{ 0xb7, 0x0f },
{ 0xb8, 0x0d },
{ 0xb9, 0x0b },
{ 0xba, 0x00 },
{ 0xc7, 0x02 },
{ 0xca, 0x17 },
{ 0xcb, 0x18 },
{ 0xcc, 0x0a },
{ 0xcd, 0x10 },
{ 0xce, 0x0e },
{ 0xcf, 0x0c },
{ 0xd0, 0x00 },
{ 0x81, 0x00 },
{ 0x84, 0x15 },
{ 0x85, 0x16 },
{ 0x86, 0x10 },
{ 0x87, 0x0a },
{ 0x88, 0x0c },
{ 0x89, 0x0e },
{ 0x8a, 0x02 },
{ 0x97, 0x00 },
{ 0x9a, 0x17 },
{ 0x9b, 0x18 },
{ 0x9c, 0x0f },
{ 0x9d, 0x09 },
{ 0x9e, 0x0b },
{ 0x9f, 0x0d },
{ 0xa0, 0x01 },
{ 0xff, 0x30 },
{ 0xff, 0x52 },
{ 0xff, 0x02 },
{ 0x01, 0x01 },
{ 0x02, 0xda },
{ 0x03, 0xba },
{ 0x04, 0xa8 },
{ 0x05, 0x9a },
{ 0x06, 0x70 },
{ 0x07, 0xff },
{ 0x08, 0x91 },
{ 0x09, 0x90 },
{ 0x0a, 0xff },
{ 0x0b, 0x8f },
{ 0x0c, 0x60 },
{ 0x0d, 0x58 },
{ 0x0e, 0x48 },
{ 0x0f, 0x38 },
{ 0x10, 0x2b },
{ 0xff, 0x30 },
{ 0xff, 0x52 },
{ 0xff, 0x00 },
{ 0x36, 0x0a },
};
static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)
{
return container_of(panel, struct nv3052c, panel);
}
static int nv3052c_prepare(struct drm_panel *panel)
{
struct nv3052c *priv = to_nv3052c(panel);
struct mipi_dbi *dbi = &priv->dbi;
unsigned int i;
int err;
err = regulator_enable(priv->supply);
if (err) {
dev_err(priv->dev, "Failed to enable power supply: %d\n", err);
return err;
}
/* Reset the chip */
gpiod_set_value_cansleep(priv->reset_gpio, 1);
usleep_range(10, 1000);
gpiod_set_value_cansleep(priv->reset_gpio, 0);
usleep_range(5000, 20000);
for (i = 0; i < ARRAY_SIZE(nv3052c_panel_regs); i++) {
err = mipi_dbi_command(dbi, nv3052c_panel_regs[i].cmd,
nv3052c_panel_regs[i].val);
if (err) {
dev_err(priv->dev, "Unable to set register: %d\n", err);
goto err_disable_regulator;
}
}
err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
if (err) {
dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);
goto err_disable_regulator;
}
return 0;
err_disable_regulator:
regulator_disable(priv->supply);
return err;
}
static int nv3052c_unprepare(struct drm_panel *panel)
{
struct nv3052c *priv = to_nv3052c(panel);
struct mipi_dbi *dbi = &priv->dbi;
int err;
err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
if (err)
dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);
gpiod_set_value_cansleep(priv->reset_gpio, 1);
regulator_disable(priv->supply);
return 0;
}
static int nv3052c_enable(struct drm_panel *panel)
{
struct nv3052c *priv = to_nv3052c(panel);
struct mipi_dbi *dbi = &priv->dbi;
int err;
err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
if (err) {
dev_err(priv->dev, "Unable to enable display: %d\n", err);
return err;
}
if (panel->backlight) {
/* Wait for the picture to be ready before enabling backlight */
msleep(120);
}
return 0;
}
static int nv3052c_disable(struct drm_panel *panel)
{
struct nv3052c *priv = to_nv3052c(panel);
struct mipi_dbi *dbi = &priv->dbi;
int err;
err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
if (err) {
dev_err(priv->dev, "Unable to disable display: %d\n", err);
return err;
}
return 0;
}
static int nv3052c_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct nv3052c *priv = to_nv3052c(panel);
const struct nv3052c_panel_info *panel_info = priv->panel_info;
struct drm_display_mode *mode;
unsigned int i;
for (i = 0; i < panel_info->num_modes; i++) {
mode = drm_mode_duplicate(connector->dev,
&panel_info->display_modes[i]);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER;
if (panel_info->num_modes == 1)
mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
}
connector->display_info.bpc = 8;
connector->display_info.width_mm = panel_info->width_mm;
connector->display_info.height_mm = panel_info->height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&panel_info->bus_format, 1);
connector->display_info.bus_flags = panel_info->bus_flags;
return panel_info->num_modes;
}
static const struct drm_panel_funcs nv3052c_funcs = {
.prepare = nv3052c_prepare,
.unprepare = nv3052c_unprepare,
.enable = nv3052c_enable,
.disable = nv3052c_disable,
.get_modes = nv3052c_get_modes,
};
static int nv3052c_probe(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct nv3052c *priv;
int err;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
priv->panel_info = of_device_get_match_data(dev);
if (!priv->panel_info)
return -EINVAL;
priv->supply = devm_regulator_get(dev, "power");
if (IS_ERR(priv->supply))
return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");
priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(priv->reset_gpio))
return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");
err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);
if (err)
return dev_err_probe(dev, err, "MIPI DBI init failed\n");
priv->dbi.read_commands = NULL;
spi_set_drvdata(spi, priv);
drm_panel_init(&priv->panel, dev, &nv3052c_funcs,
DRM_MODE_CONNECTOR_DPI);
err = drm_panel_of_backlight(&priv->panel);
if (err)
return dev_err_probe(dev, err, "Failed to attach backlight\n");
drm_panel_add(&priv->panel);
return 0;
}
static int nv3052c_remove(struct spi_device *spi)
{
struct nv3052c *priv = spi_get_drvdata(spi);
drm_panel_remove(&priv->panel);
drm_panel_disable(&priv->panel);
drm_panel_unprepare(&priv->panel);
return 0;
}
static const struct drm_display_mode ltk035c5444t_modes[] = {
{ /* 60 Hz */
.clock = 24000,
.hdisplay = 640,
.hsync_start = 640 + 96,
.hsync_end = 640 + 96 + 16,
.htotal = 640 + 96 + 16 + 48,
.vdisplay = 480,
.vsync_start = 480 + 5,
.vsync_end = 480 + 5 + 2,
.vtotal = 480 + 5 + 2 + 13,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
},
{ /* 50 Hz */
.clock = 18000,
.hdisplay = 640,
.hsync_start = 640 + 39,
.hsync_end = 640 + 39 + 2,
.htotal = 640 + 39 + 2 + 39,
.vdisplay = 480,
.vsync_start = 480 + 5,
.vsync_end = 480 + 5 + 2,
.vtotal = 480 + 5 + 2 + 13,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
},
};
static const struct nv3052c_panel_info ltk035c5444t_panel_info = {
.display_modes = ltk035c5444t_modes,
.num_modes = ARRAY_SIZE(ltk035c5444t_modes),
.width_mm = 77,
.height_mm = 64,
.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
};
static const struct of_device_id nv3052c_of_match[] = {
{ .compatible = "leadtek,ltk035c5444t", .data = &ltk035c5444t_panel_info },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, nv3052c_of_match);
static struct spi_driver nv3052c_driver = {
.driver = {
.name = "nv3052c",
.of_match_table = nv3052c_of_match,
},
.probe = nv3052c_probe,
.remove = nv3052c_remove,
};
module_spi_driver(nv3052c_driver);
MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
MODULE_LICENSE("GPL v2");