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video: bridge: add Samsung CMC623 image converter driver
Add support for a Samsung CMC623 image converter chip found in several Samsung devices such as Samsung Galaxy R (I9103) and Samsung Galaxy Tab 10.1 (GT-P75xx). Signed-off-by: Ion Agorria <ion@agorria.com> Reviewed-by: Svyatoslav Ryhel <clamor95@gmail.com> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
This commit is contained in:
Ion Agorria
Svyatoslav Ryhel
parent
c6ec48a2ba
commit
c2bcd685ec
@ -66,3 +66,11 @@ config VIDEO_BRIDGE_LVDS_CODEC
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help
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Support for transparent LVDS encoders and decoders that don't
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require any configuration.
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config VIDEO_BRIDGE_SAMSUNG_CMC623
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bool "Samsung CMC623 Image Converter driver"
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depends on VIDEO_BRIDGE && DM_GPIO
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select DM_I2C
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help
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Samsung CMC623 image converter chip driver.
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Found in several Samsung devices such as N1
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@ -11,3 +11,4 @@ obj-$(CONFIG_VIDEO_BRIDGE_ANALOGIX_ANX6345) += anx6345.o
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obj-$(CONFIG_VIDEO_BRIDGE_SOLOMON_SSD2825) += ssd2825.o
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obj-$(CONFIG_VIDEO_BRIDGE_TOSHIBA_TC358768) += tc358768.o
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obj-$(CONFIG_VIDEO_BRIDGE_LVDS_CODEC) += lvds-codec.o
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obj-$(CONFIG_VIDEO_BRIDGE_SAMSUNG_CMC623) += cmc623.o
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234
drivers/video/bridge/cmc623.c
Normal file
234
drivers/video/bridge/cmc623.c
Normal file
@ -0,0 +1,234 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2025 Ion Agorria <ion@agorria.com>
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*/
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#include <clk.h>
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#include <dm.h>
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#include <dm/ofnode_graph.h>
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#include <i2c.h>
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#include <log.h>
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#include <backlight.h>
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#include <panel.h>
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#include <video_bridge.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/math64.h>
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#include <power/regulator.h>
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#include <asm/gpio.h>
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static const char * const cmc623_supplies[] = {
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"vdd3v0-supply", "vdd1v2-supply", "vddio1v8-supply"
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};
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struct cmc623_priv {
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struct udevice *panel;
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struct display_timing timing;
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struct udevice *supplies[ARRAY_SIZE(cmc623_supplies)];
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struct gpio_desc enable_gpio; /* also known as FAILSAFE */
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struct gpio_desc bypass_gpio;
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};
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static int cmc623_attach(struct udevice *dev)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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int ret;
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/* Perform panel setup */
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ret = panel_enable_backlight(priv->panel);
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if (ret)
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return ret;
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return 0;
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}
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static int cmc623_set_backlight(struct udevice *dev, int percent)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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return panel_set_backlight(priv->panel, percent);
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}
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static int cmc623_panel_timings(struct udevice *dev, struct display_timing *timing)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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memcpy(timing, &priv->timing, sizeof(*timing));
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return 0;
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}
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static int cmc623_hw_init(struct udevice *dev)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev);
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int i, ret;
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/* enable supplies */
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for (i = 0; i < ARRAY_SIZE(cmc623_supplies); i++) {
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ret = regulator_set_enable_if_allowed(priv->supplies[i], 1);
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if (ret) {
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log_debug("%s: cannot enable %s %d\n", __func__,
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cmc623_supplies[i], ret);
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return ret;
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}
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}
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mdelay(10);
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ret = dm_gpio_set_value(&uc_priv->reset, 1);
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if (ret) {
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log_debug("%s: error at reset = 1 (%d)\n", __func__, ret);
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return ret;
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}
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ret = dm_gpio_set_value(&priv->enable_gpio, 0);
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if (ret) {
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log_debug("%s: error at enable = 0 (%d)\n", __func__, ret);
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return ret;
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}
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ret = dm_gpio_set_value(&priv->bypass_gpio, 0);
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if (ret) {
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log_debug("%s: error at bypass = 0 (%d)\n", __func__, ret);
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return ret;
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}
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ret = dm_gpio_set_value(&uc_priv->sleep, 0);
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if (ret) {
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log_debug("%s: error at sleep = 0 (%d)\n", __func__, ret);
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return ret;
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}
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udelay(2000);
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ret = dm_gpio_set_value(&priv->enable_gpio, 1);
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if (ret) {
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log_debug("%s: error at enable = 1 (%d)\n", __func__, ret);
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return ret;
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}
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udelay(2000);
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ret = dm_gpio_set_value(&priv->bypass_gpio, 1);
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if (ret) {
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log_debug("%s: error at bypass = 1 (%d)\n", __func__, ret);
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return ret;
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}
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udelay(2000);
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ret = dm_gpio_set_value(&uc_priv->sleep, 1);
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if (ret) {
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log_debug("%s: error at sleep = 1 (%d)\n", __func__, ret);
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return ret;
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}
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udelay(2000);
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ret = dm_gpio_set_value(&uc_priv->reset, 0);
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if (ret) {
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log_debug("%s: error at sleep = 0 (%d)\n", __func__, ret);
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return ret;
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}
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mdelay(10);
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ret = dm_gpio_set_value(&uc_priv->reset, 1);
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if (ret) {
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log_debug("%s: error at sleep = 1 (%d)\n", __func__, ret);
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return ret;
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}
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mdelay(10);
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return 0;
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}
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static int cmc623_get_panel(struct udevice *dev)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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int i, ret;
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u32 num = ofnode_graph_get_port_count(dev_ofnode(dev));
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for (i = 0; i < num; i++) {
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ofnode remote = ofnode_graph_get_remote_node(dev_ofnode(dev), i, -1);
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ret = uclass_get_device_by_ofnode(UCLASS_PANEL, remote, &priv->panel);
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if (!ret)
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return 0;
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}
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/* If this point is reached, no panels were found */
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return -ENODEV;
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}
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static int cmc623_probe(struct udevice *dev)
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{
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struct cmc623_priv *priv = dev_get_priv(dev);
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int i, ret;
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/* get supplies */
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for (i = 0; i < ARRAY_SIZE(cmc623_supplies); i++) {
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ret = device_get_supply_regulator(dev, cmc623_supplies[i], &priv->supplies[i]);
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if (ret) {
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log_debug("%s: cannot get %s %d\n", __func__, cmc623_supplies[i], ret);
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if (ret != -ENOENT)
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return log_ret(ret);
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}
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}
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/* get control gpios */
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ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_debug("%s: could not get enable-gpios (%d)\n", __func__, ret);
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return ret;
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}
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ret = gpio_request_by_name(dev, "bypass-gpios", 0, &priv->bypass_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_debug("%s: could not get bypass-gpios (%d)\n", __func__, ret);
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return ret;
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}
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ret = cmc623_hw_init(dev);
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if (ret) {
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log_debug("%s: error doing hw init, ret %d\n", __func__, ret);
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return ret;
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}
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ret = cmc623_get_panel(dev);
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if (ret) {
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log_debug("%s: panel not found, ret %d\n", __func__, ret);
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return ret;
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}
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panel_get_display_timing(priv->panel, &priv->timing);
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return 0;
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}
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static const struct video_bridge_ops cmc623_ops = {
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.attach = cmc623_attach,
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.set_backlight = cmc623_set_backlight,
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.get_display_timing = cmc623_panel_timings,
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};
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static const struct udevice_id cmc623_ids[] = {
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{ .compatible = "samsung,cmc623" },
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{ }
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};
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U_BOOT_DRIVER(samsung_cmc623) = {
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.name = "samsung_cmc623",
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.id = UCLASS_VIDEO_BRIDGE,
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.of_match = cmc623_ids,
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.ops = &cmc623_ops,
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.bind = dm_scan_fdt_dev,
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.probe = cmc623_probe,
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.priv_auto = sizeof(struct cmc623_priv),
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};
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