diff options
Diffstat (limited to 'drivers/video/renesas-r69328.c')
| -rw-r--r-- | drivers/video/renesas-r69328.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/drivers/video/renesas-r69328.c b/drivers/video/renesas-r69328.c new file mode 100644 index 0000000..d2f7169 --- /dev/null +++ b/drivers/video/renesas-r69328.c @@ -0,0 +1,238 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Renesas R69328 panel driver + * + * Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com> + */ + +#include <common.h> +#include <backlight.h> +#include <dm.h> +#include <panel.h> +#include <log.h> +#include <misc.h> +#include <mipi_display.h> +#include <mipi_dsi.h> +#include <asm/gpio.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <power/regulator.h> + +/* + * The datasheet is not publicly available, all values are + * taken from the downstream. If you have access to datasheets, + * corrections are welcome. + */ + +#define R69328_MACP 0xB0 /* Manufacturer Command Access Protect */ + +#define R69328_GAMMA_SET_A 0xC8 /* Gamma Setting A */ +#define R69328_GAMMA_SET_B 0xC9 /* Gamma Setting B */ +#define R69328_GAMMA_SET_C 0xCA /* Gamma Setting C */ + +#define R69328_POWER_SET 0xD1 + +struct renesas_r69328_priv { + struct udevice *backlight; + + struct gpio_desc enable_gpio; + struct gpio_desc reset_gpio; +}; + +static const u8 address_mode[] = { + MIPI_DCS_SET_ADDRESS_MODE +}; + +#define dsi_generic_write_seq(dsi, cmd, seq...) do { \ + static const u8 b[] = { cmd, seq }; \ + int ret; \ + ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b)); \ + if (ret < 0) \ + return ret; \ + } while (0) + +static struct display_timing default_timing = { + .pixelclock.typ = 68000000, + .hactive.typ = 720, + .hfront_porch.typ = 92, + .hback_porch.typ = 62, + .hsync_len.typ = 4, + .vactive.typ = 1280, + .vfront_porch.typ = 6, + .vback_porch.typ = 3, + .vsync_len.typ = 1, +}; + +static int renesas_r69328_enable_backlight(struct udevice *dev) +{ + struct renesas_r69328_priv *priv = dev_get_priv(dev); + int ret; + + ret = dm_gpio_set_value(&priv->enable_gpio, 1); + if (ret) { + log_err("error changing enable-gpios (%d)\n", ret); + return ret; + } + mdelay(5); + + ret = dm_gpio_set_value(&priv->reset_gpio, 0); + if (ret) { + log_err("error changing reset-gpios (%d)\n", ret); + return ret; + } + mdelay(5); + + ret = dm_gpio_set_value(&priv->reset_gpio, 1); + if (ret) { + log_err("error changing reset-gpios (%d)\n", ret); + return ret; + } + + mdelay(5); + + return 0; +} + +static int renesas_r69328_set_backlight(struct udevice *dev, int percent) +{ + struct renesas_r69328_priv *priv = dev_get_priv(dev); + struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); + struct mipi_dsi_device *dsi = plat->device; + int ret; + + mipi_dsi_dcs_write_buffer(dsi, address_mode, + sizeof(address_mode)); + + ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4); + if (ret < 0) { + log_err("failed to set pixel format: %d\n", ret); + return ret; + } + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + log_err("failed to exit sleep mode: %d\n", ret); + return ret; + } + + mdelay(100); + + /* MACP Off */ + dsi_generic_write_seq(dsi, R69328_MACP, 0x04); + + dsi_generic_write_seq(dsi, R69328_POWER_SET, 0x14, + 0x1d, 0x21, 0x67, 0x11, 0x9a); + + dsi_generic_write_seq(dsi, R69328_GAMMA_SET_A, 0x00, + 0x1a, 0x20, 0x28, 0x25, 0x24, + 0x26, 0x15, 0x13, 0x11, 0x18, + 0x1e, 0x1c, 0x00, 0x00, 0x1a, + 0x20, 0x28, 0x25, 0x24, 0x26, + 0x15, 0x13, 0x11, 0x18, 0x1e, + 0x1c, 0x00); + dsi_generic_write_seq(dsi, R69328_GAMMA_SET_B, 0x00, + 0x1a, 0x20, 0x28, 0x25, 0x24, + 0x26, 0x15, 0x13, 0x11, 0x18, + 0x1e, 0x1c, 0x00, 0x00, 0x1a, + 0x20, 0x28, 0x25, 0x24, 0x26, + 0x15, 0x13, 0x11, 0x18, 0x1e, + 0x1c, 0x00); + dsi_generic_write_seq(dsi, R69328_GAMMA_SET_C, 0x00, + 0x1a, 0x20, 0x28, 0x25, 0x24, + 0x26, 0x15, 0x13, 0x11, 0x18, + 0x1e, 0x1c, 0x00, 0x00, 0x1a, + 0x20, 0x28, 0x25, 0x24, 0x26, + 0x15, 0x13, 0x11, 0x18, 0x1e, + 0x1c, 0x00); + + /* MACP On */ + dsi_generic_write_seq(dsi, R69328_MACP, 0x03); + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + log_err("failed to set display on: %d\n", ret); + return ret; + } + + mdelay(50); + + ret = backlight_enable(priv->backlight); + if (ret) + return ret; + + ret = backlight_set_brightness(priv->backlight, percent); + if (ret) + return ret; + + return 0; +} + +static int renesas_r69328_timings(struct udevice *dev, + struct display_timing *timing) +{ + memcpy(timing, &default_timing, sizeof(*timing)); + return 0; +} + +static int renesas_r69328_of_to_plat(struct udevice *dev) +{ + struct renesas_r69328_priv *priv = dev_get_priv(dev); + int ret; + + ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, + "backlight", &priv->backlight); + if (ret) { + log_err("cannot get backlight: ret = %d\n", ret); + return ret; + } + + ret = gpio_request_by_name(dev, "enable-gpios", 0, + &priv->enable_gpio, GPIOD_IS_OUT); + if (ret) { + log_err("could not decode enable-gpios (%d)\n", ret); + return ret; + } + + ret = gpio_request_by_name(dev, "reset-gpios", 0, + &priv->reset_gpio, GPIOD_IS_OUT); + if (ret) { + log_err("could not decode reser-gpios (%d)\n", ret); + return ret; + } + + return 0; +} + +static int renesas_r69328_probe(struct udevice *dev) +{ + struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); + + /* fill characteristics of DSI data link */ + plat->lanes = 4; + plat->format = MIPI_DSI_FMT_RGB888; + plat->mode_flags = MIPI_DSI_MODE_VIDEO; + + return 0; +} + +static const struct panel_ops renesas_r69328_ops = { + .enable_backlight = renesas_r69328_enable_backlight, + .set_backlight = renesas_r69328_set_backlight, + .get_display_timing = renesas_r69328_timings, +}; + +static const struct udevice_id renesas_r69328_ids[] = { + { .compatible = "jdi,dx12d100vm0eaa" }, + { } +}; + +U_BOOT_DRIVER(renesas_r69328) = { + .name = "renesas_r69328", + .id = UCLASS_PANEL, + .of_match = renesas_r69328_ids, + .ops = &renesas_r69328_ops, + .of_to_plat = renesas_r69328_of_to_plat, + .probe = renesas_r69328_probe, + .plat_auto = sizeof(struct mipi_dsi_panel_plat), + .priv_auto = sizeof(struct renesas_r69328_priv), +}; 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