--- /dev/null
+// 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),
+};
projects / u-boot.git / commitdiff
