The TI TDP158 is an AC-Coupled HDMI signal to TMDS Redriver supporting DVI 1.0 and HDMI 1.4b and 2.0b output signals. Signed-off-by: Marc Gonzalez <mgonzalez@xxxxxxxxxx> --- drivers/gpu/drm/bridge/simple-bridge.c | 64 ++++++++++++++++++++++++++++++++-- 1 file changed, 61 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c index f1e458a15882f..745d253e55f7e 100644 --- a/drivers/gpu/drm/bridge/simple-bridge.c +++ b/drivers/gpu/drm/bridge/simple-bridge.c @@ -6,6 +6,8 @@ * Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> */ +#include <linux/i2c.h> +#include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/of.h> @@ -32,6 +34,7 @@ struct simple_bridge { const struct simple_bridge_info *info; struct drm_bridge *next_bridge; + struct regulator *vcc; struct regulator *vdd; struct gpio_desc *enable; }; @@ -142,8 +145,16 @@ static void simple_bridge_enable(struct drm_bridge *bridge) struct simple_bridge *sbridge = drm_bridge_to_simple_bridge(bridge); int ret; + if (sbridge->vcc) { + ret = regulator_enable(sbridge->vcc); + msleep(100); + if (ret) + DRM_ERROR("Failed to enable vcc regulator: %d\n", ret); + } + if (sbridge->vdd) { ret = regulator_enable(sbridge->vdd); + msleep(100); if (ret) DRM_ERROR("Failed to enable vdd regulator: %d\n", ret); } @@ -159,6 +170,9 @@ static void simple_bridge_disable(struct drm_bridge *bridge) if (sbridge->vdd) regulator_disable(sbridge->vdd); + + if (sbridge->vcc) + regulator_disable(sbridge->vcc); } static const struct drm_bridge_funcs simple_bridge_bridge_funcs = { @@ -167,16 +181,14 @@ static const struct drm_bridge_funcs simple_bridge_bridge_funcs = { .disable = simple_bridge_disable, }; -static int simple_bridge_probe(struct platform_device *pdev) +static int common_probe(struct device *dev, struct simple_bridge **res) { - struct device *dev = &pdev->dev; struct simple_bridge *sbridge; struct device_node *remote; sbridge = devm_kzalloc(dev, sizeof(*sbridge), GFP_KERNEL); if (!sbridge) return -ENOMEM; - platform_set_drvdata(pdev, sbridge); sbridge->info = of_device_get_match_data(dev); @@ -203,6 +215,15 @@ static int simple_bridge_probe(struct platform_device *pdev) dev_dbg(dev, "No vdd regulator found: %d\n", ret); } + sbridge->vcc = devm_regulator_get_optional(dev, "vcc"); + if (IS_ERR(sbridge->vcc)) { + int ret = PTR_ERR(sbridge->vcc); + if (ret == -EPROBE_DEFER) + return -EPROBE_DEFER; + sbridge->vcc = NULL; + dev_dbg(dev, "No vcc regulator found: %d\n", ret); + } + sbridge->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(sbridge->enable)) @@ -213,10 +234,27 @@ static int simple_bridge_probe(struct platform_device *pdev) sbridge->bridge.funcs = &simple_bridge_bridge_funcs; sbridge->bridge.of_node = dev->of_node; sbridge->bridge.timings = sbridge->info->timings; + *res = sbridge; return devm_drm_bridge_add(dev, &sbridge->bridge); } +static int simple_bridge_probe(struct platform_device *pdev) +{ + struct simple_bridge *sbridge = NULL; + int err = common_probe(&pdev->dev, &sbridge); + platform_set_drvdata(pdev, sbridge); + return err; +} + +static int i2c_probe(struct i2c_client *client) +{ + struct simple_bridge *sbridge = NULL; + int err = common_probe(&client->dev, &sbridge); + i2c_set_clientdata(client, sbridge); + return err; +} + /* * We assume the ADV7123 DAC is the "default" for historical reasons * Information taken from the ADV7123 datasheet, revision D. @@ -298,6 +336,26 @@ static struct platform_driver simple_bridge_driver = { }; module_platform_driver(simple_bridge_driver); +static const struct of_device_id i2c_match_table[] = { + { + .compatible = "ti,tdp158", + .data = &(const struct simple_bridge_info) { + .connector_type = DRM_MODE_CONNECTOR_HDMIA, + }, + }, + { } +}; +MODULE_DEVICE_TABLE(of, i2c_match_table); + +static struct i2c_driver i2c_simple_bridge_driver = { + .probe = i2c_probe, + .driver = { + .name = "i2c-simple-bridge", + .of_match_table = i2c_match_table, + }, +}; +module_i2c_driver(i2c_simple_bridge_driver); + MODULE_AUTHOR("Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>"); MODULE_DESCRIPTION("Simple DRM bridge driver"); MODULE_LICENSE("GPL"); -- 2.34.1