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Merge remote-tracking branch 'origin/dev-t256' into HEAD

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Change-Id: I171cfd58fdb25c5ec158a0db11d97ada5603c578
Signed-off-by: Armandeep Singh <armandeeps@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3365262
Reviewed-by: Ishwarya Balaji Gururajan <igururajan@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Armandeep Singh
2025-05-21 23:40:23 -07:00
committed by Jon Hunter
parent a5b3a14cc8
commit cb108984e1
1 changed files with 51 additions and 0 deletions
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51
drivers/video/tegra/dc/bridge/nvdisp_serdes.c
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@@ -65,6 +65,8 @@ struct nvdisp_serdes_priv {
struct mutex mutex; struct mutex mutex;
struct regmap *regmap; struct regmap *regmap;
int serdes_errb; int serdes_errb;
int serdes_pwrdn; /* GPIO number for power down pin */
struct gpio_desc *gpiod_pwrdn; /* GPIO descriptor for power pin */
unsigned int ser_irq; unsigned int ser_irq;
struct opcode_sequence init_seq, deinit_seq, errb_seq; struct opcode_sequence init_seq, deinit_seq, errb_seq;
}; };
@@ -674,6 +676,24 @@ done:
return ret; return ret;
} }
static int nvdisp_serdes_power_on(struct nvdisp_serdes_priv *priv)
{
struct device *dev = &priv->client->dev;
int ret = 0;
if (priv->gpiod_pwrdn) {
dev_info(dev, "%s: Setting nvdisp-serdes-pwrdn pin high to power on serializer\n", __func__);
gpiod_set_value_cansleep(priv->gpiod_pwrdn, 1);
} else if (gpio_is_valid(priv->serdes_pwrdn)) {
dev_info(dev, "%s: Setting nvdisp-serdes-pwrdn pin high to power on serializer\n", __func__);
gpio_set_value_cansleep(priv->serdes_pwrdn, 1);
} else {
dev_info(dev, "%s: No valid nvdisp-serdes-pwrdn pin available\n", __func__);
}
return ret;
}
static int nvdisp_serdes_init(struct device *dev) static int nvdisp_serdes_init(struct device *dev)
{ {
struct nvdisp_serdes_priv *priv; struct nvdisp_serdes_priv *priv;
@@ -684,6 +704,13 @@ static int nvdisp_serdes_init(struct device *dev)
client = to_i2c_client(dev); client = to_i2c_client(dev);
priv = i2c_get_clientdata(client); priv = i2c_get_clientdata(client);
/* First power on the serializer */
ret = nvdisp_serdes_power_on(priv);
if (ret != 0) {
dev_err(dev, "%s: Failed to power on serializer\n", __func__);
return ret;
}
/* opcode dispatcher code */ /* opcode dispatcher code */
while (init_pos < priv->init_seq.length) { while (init_pos < priv->init_seq.length) {
ret = dispatch_opcode(client, priv, priv->init_seq.payload, &init_pos, priv->init_seq.length); ret = dispatch_opcode(client, priv, priv->init_seq.payload, &init_pos, priv->init_seq.length);
@@ -710,6 +737,7 @@ static int nvdisp_serdes_probe(struct i2c_client *client)
priv->client = client; priv->client = client;
i2c_set_clientdata(client, priv); i2c_set_clientdata(client, priv);
priv->gpiod_pwrdn = NULL; /* Initialize to NULL for safety */
dev = &priv->client->dev; dev = &priv->client->dev;
@@ -725,6 +753,29 @@ static int nvdisp_serdes_probe(struct i2c_client *client)
return -EFAULT; return -EFAULT;
} }
/* Get the PWRDN GPIO pin */
priv->serdes_pwrdn = of_get_named_gpio(ser, "nvdisp-serdes-pwrdn", 0);
if (!gpio_is_valid(priv->serdes_pwrdn)) {
dev_err(dev, "%s: nvdisp-serdes-pwrdn GPIO not valid\n", __func__);
/* Continue even if GPIO is not valid - don't return error */
} else {
/* Request the GPIO pin with initial state LOW (powered down) */
ret = devm_gpio_request_one(&client->dev, priv->serdes_pwrdn,
GPIOF_OUT_INIT_LOW, "GPIO_PWRDN_NVDISP_SERDES");
if (ret < 0) {
dev_err(dev, "%s: devm_gpio_request_one for nvdisp-serdes-pwrdn failed ret: %d\n",
__func__, ret);
/* Continue even if GPIO request fails - don't return error */
} else {
/* Create GPIO descriptor for later use */
priv->gpiod_pwrdn = gpio_to_desc(priv->serdes_pwrdn);
if (!priv->gpiod_pwrdn) {
dev_err(dev, "%s: Failed to get GPIO descriptor for nvdisp-serdes-pwrdn\n",
__func__);
}
}
}
ret = nvdisp_serdes_init(&client->dev); ret = nvdisp_serdes_init(&client->dev);
if (ret < 0) { if (ret < 0) {
dev_err(dev, "%s: nvdisp serdes init failed\n", __func__); dev_err(dev, "%s: nvdisp serdes init failed\n", __func__);