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drm: bridge: Add thc63lvd1024 LVDS decoder driver
Add DRM bridge driver for Thine THC63LVD1024 LVDS to digital parallel output converter. Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/1524062429-325-3-git-send-email-jacopo+renesas@jmondi.org
This commit is contained in:
Jacopo Mondi
Andrzej Hajda
parent
f2ce15c72a
commit
cdc33b8672
@ -93,6 +93,12 @@ config DRM_SII9234
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It is an I2C driver, that detects connection of MHL bridge
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and starts encapsulation of HDMI signal.
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config DRM_THINE_THC63LVD1024
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tristate "Thine THC63LVD1024 LVDS decoder bridge"
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depends on OF
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---help---
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Thine THC63LVD1024 LVDS/parallel converter driver.
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config DRM_TOSHIBA_TC358767
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tristate "Toshiba TC358767 eDP bridge"
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depends on OF
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@ -8,6 +8,7 @@ obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
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obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
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obj-$(CONFIG_DRM_SII902X) += sii902x.o
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obj-$(CONFIG_DRM_SII9234) += sii9234.o
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obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
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obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
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obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
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obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
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206
drivers/gpu/drm/bridge/thc63lvd1024.c
Normal file
206
drivers/gpu/drm/bridge/thc63lvd1024.c
Normal file
@ -0,0 +1,206 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* THC63LVD1024 LVDS to parallel data DRM bridge driver.
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*
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* Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
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*/
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#include <drm/drmP.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_panel.h>
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#include <linux/gpio/consumer.h>
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#include <linux/of_graph.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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enum thc63_ports {
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THC63_LVDS_IN0,
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THC63_LVDS_IN1,
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THC63_RGB_OUT0,
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THC63_RGB_OUT1,
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};
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struct thc63_dev {
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struct device *dev;
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struct regulator *vcc;
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struct gpio_desc *pdwn;
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struct gpio_desc *oe;
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struct drm_bridge bridge;
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struct drm_bridge *next;
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};
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static inline struct thc63_dev *to_thc63(struct drm_bridge *bridge)
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{
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return container_of(bridge, struct thc63_dev, bridge);
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}
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static int thc63_attach(struct drm_bridge *bridge)
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{
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struct thc63_dev *thc63 = to_thc63(bridge);
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return drm_bridge_attach(bridge->encoder, thc63->next, bridge);
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}
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static void thc63_enable(struct drm_bridge *bridge)
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{
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struct thc63_dev *thc63 = to_thc63(bridge);
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int ret;
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ret = regulator_enable(thc63->vcc);
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if (ret) {
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dev_err(thc63->dev,
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"Failed to enable regulator \"vcc\": %d\n", ret);
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return;
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}
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gpiod_set_value(thc63->pdwn, 0);
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gpiod_set_value(thc63->oe, 1);
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}
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static void thc63_disable(struct drm_bridge *bridge)
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{
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struct thc63_dev *thc63 = to_thc63(bridge);
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int ret;
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gpiod_set_value(thc63->oe, 0);
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gpiod_set_value(thc63->pdwn, 1);
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ret = regulator_disable(thc63->vcc);
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if (ret)
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dev_err(thc63->dev,
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"Failed to disable regulator \"vcc\": %d\n", ret);
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}
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static const struct drm_bridge_funcs thc63_bridge_func = {
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.attach = thc63_attach,
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.enable = thc63_enable,
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.disable = thc63_disable,
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};
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static int thc63_parse_dt(struct thc63_dev *thc63)
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{
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struct device_node *thc63_out;
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struct device_node *remote;
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thc63_out = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
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THC63_RGB_OUT0, -1);
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if (!thc63_out) {
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dev_err(thc63->dev, "Missing endpoint in port@%u\n",
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THC63_RGB_OUT0);
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return -ENODEV;
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}
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remote = of_graph_get_remote_port_parent(thc63_out);
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of_node_put(thc63_out);
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if (!remote) {
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dev_err(thc63->dev, "Endpoint in port@%u unconnected\n",
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THC63_RGB_OUT0);
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return -ENODEV;
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}
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if (!of_device_is_available(remote)) {
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dev_err(thc63->dev, "port@%u remote endpoint is disabled\n",
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THC63_RGB_OUT0);
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of_node_put(remote);
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return -ENODEV;
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}
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thc63->next = of_drm_find_bridge(remote);
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of_node_put(remote);
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if (!thc63->next)
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return -EPROBE_DEFER;
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return 0;
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}
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static int thc63_gpio_init(struct thc63_dev *thc63)
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{
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thc63->oe = devm_gpiod_get_optional(thc63->dev, "oe", GPIOD_OUT_LOW);
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if (IS_ERR(thc63->oe)) {
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dev_err(thc63->dev, "Unable to get \"oe-gpios\": %ld\n",
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PTR_ERR(thc63->oe));
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return PTR_ERR(thc63->oe);
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}
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thc63->pdwn = devm_gpiod_get_optional(thc63->dev, "powerdown",
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GPIOD_OUT_HIGH);
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if (IS_ERR(thc63->pdwn)) {
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dev_err(thc63->dev, "Unable to get \"powerdown-gpios\": %ld\n",
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PTR_ERR(thc63->pdwn));
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return PTR_ERR(thc63->pdwn);
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}
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return 0;
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}
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static int thc63_probe(struct platform_device *pdev)
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{
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struct thc63_dev *thc63;
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int ret;
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thc63 = devm_kzalloc(&pdev->dev, sizeof(*thc63), GFP_KERNEL);
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if (!thc63)
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return -ENOMEM;
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thc63->dev = &pdev->dev;
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platform_set_drvdata(pdev, thc63);
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thc63->vcc = devm_regulator_get_optional(thc63->dev, "vcc");
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if (IS_ERR(thc63->vcc)) {
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if (PTR_ERR(thc63->vcc) == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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dev_err(thc63->dev, "Unable to get \"vcc\" supply: %ld\n",
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PTR_ERR(thc63->vcc));
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return PTR_ERR(thc63->vcc);
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}
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ret = thc63_gpio_init(thc63);
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if (ret)
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return ret;
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ret = thc63_parse_dt(thc63);
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if (ret)
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return ret;
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thc63->bridge.driver_private = thc63;
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thc63->bridge.of_node = pdev->dev.of_node;
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thc63->bridge.funcs = &thc63_bridge_func;
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drm_bridge_add(&thc63->bridge);
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return 0;
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}
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static int thc63_remove(struct platform_device *pdev)
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{
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struct thc63_dev *thc63 = platform_get_drvdata(pdev);
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drm_bridge_remove(&thc63->bridge);
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return 0;
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}
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static const struct of_device_id thc63_match[] = {
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{ .compatible = "thine,thc63lvd1024", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, thc63_match);
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static struct platform_driver thc63_driver = {
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.probe = thc63_probe,
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.remove = thc63_remove,
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.driver = {
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.name = "thc63lvd1024",
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.of_match_table = thc63_match,
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},
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};
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module_platform_driver(thc63_driver);
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MODULE_AUTHOR("Jacopo Mondi <jacopo@jmondi.org>");
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MODULE_DESCRIPTION("Thine THC63LVD1024 LVDS decoder DRM bridge driver");
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MODULE_LICENSE("GPL v2");
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