diff options
Diffstat (limited to 'drivers/video/bridge/cmc623.c')
| -rw-r--r-- | drivers/video/bridge/cmc623.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/video/bridge/cmc623.c b/drivers/video/bridge/cmc623.c new file mode 100644 index 00000000000..78dafef8145 --- /dev/null +++ b/drivers/video/bridge/cmc623.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2025 Ion Agorria <ion@agorria.com> + */ + +#include <clk.h> +#include <dm.h> +#include <dm/ofnode_graph.h> +#include <i2c.h> +#include <log.h> +#include <backlight.h> +#include <panel.h> +#include <video_bridge.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/math64.h> +#include <power/regulator.h> +#include <asm/gpio.h> + +static const char * const cmc623_supplies[] = { + "vdd3v0-supply", "vdd1v2-supply", "vddio1v8-supply" +}; + +struct cmc623_priv { + struct udevice *panel; + struct display_timing timing; + + struct udevice *supplies[ARRAY_SIZE(cmc623_supplies)]; + + struct gpio_desc enable_gpio; /* also known as FAILSAFE */ + struct gpio_desc bypass_gpio; +}; + +static int cmc623_attach(struct udevice *dev) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + int ret; + + /* Perform panel setup */ + ret = panel_enable_backlight(priv->panel); + if (ret) + return ret; + + return 0; +} + +static int cmc623_set_backlight(struct udevice *dev, int percent) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + + return panel_set_backlight(priv->panel, percent); +} + +static int cmc623_panel_timings(struct udevice *dev, struct display_timing *timing) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + + memcpy(timing, &priv->timing, sizeof(*timing)); + + return 0; +} + +static int cmc623_hw_init(struct udevice *dev) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); + int i, ret; + + /* enable supplies */ + for (i = 0; i < ARRAY_SIZE(cmc623_supplies); i++) { + ret = regulator_set_enable_if_allowed(priv->supplies[i], 1); + if (ret) { + log_debug("%s: cannot enable %s %d\n", __func__, + cmc623_supplies[i], ret); + return ret; + } + } + + mdelay(10); + + ret = dm_gpio_set_value(&uc_priv->reset, 1); + if (ret) { + log_debug("%s: error at reset = 1 (%d)\n", __func__, ret); + return ret; + } + + ret = dm_gpio_set_value(&priv->enable_gpio, 0); + if (ret) { + log_debug("%s: error at enable = 0 (%d)\n", __func__, ret); + return ret; + } + + ret = dm_gpio_set_value(&priv->bypass_gpio, 0); + if (ret) { + log_debug("%s: error at bypass = 0 (%d)\n", __func__, ret); + return ret; + } + + ret = dm_gpio_set_value(&uc_priv->sleep, 0); + if (ret) { + log_debug("%s: error at sleep = 0 (%d)\n", __func__, ret); + return ret; + } + + udelay(2000); + + ret = dm_gpio_set_value(&priv->enable_gpio, 1); + if (ret) { + log_debug("%s: error at enable = 1 (%d)\n", __func__, ret); + return ret; + } + + udelay(2000); + + ret = dm_gpio_set_value(&priv->bypass_gpio, 1); + if (ret) { + log_debug("%s: error at bypass = 1 (%d)\n", __func__, ret); + return ret; + } + + udelay(2000); + + ret = dm_gpio_set_value(&uc_priv->sleep, 1); + if (ret) { + log_debug("%s: error at sleep = 1 (%d)\n", __func__, ret); + return ret; + } + + udelay(2000); + + ret = dm_gpio_set_value(&uc_priv->reset, 0); + if (ret) { + log_debug("%s: error at sleep = 0 (%d)\n", __func__, ret); + return ret; + } + + mdelay(10); + + ret = dm_gpio_set_value(&uc_priv->reset, 1); + if (ret) { + log_debug("%s: error at sleep = 1 (%d)\n", __func__, ret); + return ret; + } + + mdelay(10); + + return 0; +} + +static int cmc623_get_panel(struct udevice *dev) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + int i, ret; + + u32 num = ofnode_graph_get_port_count(dev_ofnode(dev)); + + for (i = 0; i < num; i++) { + ofnode remote = ofnode_graph_get_remote_node(dev_ofnode(dev), i, -1); + + ret = uclass_get_device_by_ofnode(UCLASS_PANEL, remote, &priv->panel); + if (!ret) + return 0; + } + + /* If this point is reached, no panels were found */ + return -ENODEV; +} + +static int cmc623_probe(struct udevice *dev) +{ + struct cmc623_priv *priv = dev_get_priv(dev); + int i, ret; + + /* get supplies */ + for (i = 0; i < ARRAY_SIZE(cmc623_supplies); i++) { + ret = device_get_supply_regulator(dev, cmc623_supplies[i], &priv->supplies[i]); + if (ret) { + log_debug("%s: cannot get %s %d\n", __func__, cmc623_supplies[i], ret); + if (ret != -ENOENT) + return log_ret(ret); + } + } + + /* get control gpios */ + ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable_gpio, GPIOD_IS_OUT); + if (ret) { + log_debug("%s: could not get enable-gpios (%d)\n", __func__, ret); + return ret; + } + + ret = gpio_request_by_name(dev, "bypass-gpios", 0, &priv->bypass_gpio, GPIOD_IS_OUT); + if (ret) { + log_debug("%s: could not get bypass-gpios (%d)\n", __func__, ret); + return ret; + } + + ret = cmc623_hw_init(dev); + if (ret) { + log_debug("%s: error doing hw init, ret %d\n", __func__, ret); + return ret; + } + + ret = cmc623_get_panel(dev); + if (ret) { + log_debug("%s: panel not found, ret %d\n", __func__, ret); + return ret; + } + + panel_get_display_timing(priv->panel, &priv->timing); + + return 0; +} + +static const struct video_bridge_ops cmc623_ops = { + .attach = cmc623_attach, + .set_backlight = cmc623_set_backlight, + .get_display_timing = cmc623_panel_timings, +}; + +static const struct udevice_id cmc623_ids[] = { + { .compatible = "samsung,cmc623" }, + { } +}; + +U_BOOT_DRIVER(samsung_cmc623) = { + .name = "samsung_cmc623", + .id = UCLASS_VIDEO_BRIDGE, + .of_match = cmc623_ids, + .ops = &cmc623_ops, + .bind = dm_scan_fdt_dev, + .probe = cmc623_probe, + .priv_auto = sizeof(struct cmc623_priv), +}; |