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drm/panel: Add Ronbo RB070D30 panel
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The Ronbo RB070D30 panel is a MIPI-DSI panel based on a Fitipower EK79007
controller and a 1024x600 panel.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Konstantin Sudakov <k.sudakov@integrasources.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3cc43c6051e89a52434053a38a36621acab7236e.1550650810.git-series.maxime.ripard@bootlin.com
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Konstantin Sudakov authored and Maxime Ripard committed Feb 26, 2019
1 parent 1860cc4 commit 979a1bb
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9 changes: 9 additions & 0 deletions drivers/gpu/drm/panel/Kconfig
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Expand Up @@ -149,6 +149,15 @@ config DRM_PANEL_RAYDIUM_RM68200
Say Y here if you want to enable support for Raydium RM68200
720x1280 DSI video mode panel.

config DRM_PANEL_RONBO_RB070D30
tristate "Ronbo Electronics RB070D30 panel"
depends on OF
depends on DRM_MIPI_DSI
depends on BACKLIGHT_CLASS_DEVICE
help
Say Y here if you want to enable support for Ronbo Electronics
RB070D30 1024x600 DSI panel.

config DRM_PANEL_SAMSUNG_S6D16D0
tristate "Samsung S6D16D0 DSI video mode panel"
depends on OF
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1 change: 1 addition & 0 deletions drivers/gpu/drm/panel/Makefile
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Expand Up @@ -13,6 +13,7 @@ obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o
obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen.o
obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o
obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
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258 changes: 258 additions & 0 deletions drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
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@@ -0,0 +1,258 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018-2019, Bridge Systems BV
* Copyright (C) 2018-2019, Bootlin
* Copyright (C) 2017, Free Electrons
*
* This file based on panel-ilitek-ili9881c.c
*/

#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/kernel.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>

#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>

#include <drm/drm_connector.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>

struct rb070d30_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct backlight_device *backlight;
struct regulator *supply;

struct {
struct gpio_desc *power;
struct gpio_desc *reset;
struct gpio_desc *updn;
struct gpio_desc *shlr;
} gpios;
};

static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
{
return container_of(panel, struct rb070d30_panel, panel);
}

static int rb070d30_panel_prepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
int ret;

ret = regulator_enable(ctx->supply);
if (ret < 0) {
DRM_DEV_ERROR(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
return ret;
}

msleep(20);
gpiod_set_value(ctx->gpios.power, 1);
msleep(20);
gpiod_set_value(ctx->gpios.reset, 1);
msleep(20);
return 0;
}

static int rb070d30_panel_unprepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);

gpiod_set_value(ctx->gpios.reset, 0);
gpiod_set_value(ctx->gpios.power, 0);
regulator_disable(ctx->supply);

return 0;
}

static int rb070d30_panel_enable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
int ret;

ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
if (ret)
return ret;

ret = backlight_enable(ctx->backlight);
if (ret)
goto out;

return 0;

out:
mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
return ret;
}

static int rb070d30_panel_disable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);

backlight_disable(ctx->backlight);
return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
}

/* Default timings */
static const struct drm_display_mode default_mode = {
.clock = 51206,
.hdisplay = 1024,
.hsync_start = 1024 + 160,
.hsync_end = 1024 + 160 + 80,
.htotal = 1024 + 160 + 80 + 80,
.vdisplay = 600,
.vsync_start = 600 + 12,
.vsync_end = 600 + 12 + 10,
.vtotal = 600 + 12 + 10 + 13,
.vrefresh = 60,

.width_mm = 154,
.height_mm = 85,
};

static int rb070d30_panel_get_modes(struct drm_panel *panel)
{
struct drm_connector *connector = panel->connector;
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
struct drm_display_mode *mode;
static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;

mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
DRM_DEV_ERROR(&ctx->dsi->dev,
"Failed to add mode " DRM_MODE_FMT "\n",
DRM_MODE_ARG(&default_mode));
return -EINVAL;
}

drm_mode_set_name(mode);

mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);

panel->connector->display_info.bpc = 8;
panel->connector->display_info.width_mm = mode->width_mm;
panel->connector->display_info.height_mm = mode->height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&bus_format, 1);

return 1;
}

static const struct drm_panel_funcs rb070d30_panel_funcs = {
.get_modes = rb070d30_panel_get_modes,
.prepare = rb070d30_panel_prepare,
.enable = rb070d30_panel_enable,
.disable = rb070d30_panel_disable,
.unprepare = rb070d30_panel_unprepare,
};

static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx;
int ret;

ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;

ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
if (IS_ERR(ctx->supply))
return PTR_ERR(ctx->supply);

mipi_dsi_set_drvdata(dsi, ctx);
ctx->dsi = dsi;

drm_panel_init(&ctx->panel);
ctx->panel.dev = &dsi->dev;
ctx->panel.funcs = &rb070d30_panel_funcs;

ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.reset)) {
DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(ctx->gpios.reset);
}

ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.power)) {
DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n");
return PTR_ERR(ctx->gpios.power);
}

/*
* We don't change the state of that GPIO later on but we need
* to force it into a low state.
*/
ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.updn)) {
DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n");
return PTR_ERR(ctx->gpios.updn);
}

/*
* We don't change the state of that GPIO later on but we need
* to force it into a low state.
*/
ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.shlr)) {
DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n");
return PTR_ERR(ctx->gpios.shlr);
}

ctx->backlight = devm_of_find_backlight(&dsi->dev);
if (IS_ERR(ctx->backlight)) {
DRM_DEV_ERROR(&dsi->dev, "Couldn't get our backlight\n");
return PTR_ERR(ctx->backlight);
}

ret = drm_panel_add(&ctx->panel);
if (ret < 0)
return ret;

dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->lanes = 4;

return mipi_dsi_attach(dsi);
}

static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);

mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);

return 0;
}

static const struct of_device_id rb070d30_panel_of_match[] = {
{ .compatible = "ronbo,rb070d30" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);

static struct mipi_dsi_driver rb070d30_panel_driver = {
.probe = rb070d30_panel_dsi_probe,
.remove = rb070d30_panel_dsi_remove,
.driver = {
.name = "panel-ronbo-rb070d30",
.of_match_table = rb070d30_panel_of_match,
},
};
module_mipi_dsi_driver(rb070d30_panel_driver);

MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
MODULE_LICENSE("GPL");

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