drm/i915/dsi: Extract common soc_gpio_set_value() helper

Extract a common soc_gpio_set_value() helper that may be used by a few
SoCs.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231103201831.1037416-12-andriy.shevchenko@linux.intel.com

drivers/gpu/drm/i915/display/intel_dsi_vbt.c

@@ -243,6 +243,31 @@ static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
 	return data;
 }
 
+static void soc_gpio_set_value(struct intel_connector *connector, const char *con_id,
+			       u8 gpio_index, bool value)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	/* XXX: this table is a quick ugly hack. */
+	static struct gpio_desc *soc_gpio_table[U8_MAX + 1];
+	struct gpio_desc *gpio_desc = soc_gpio_table[gpio_index];
+
+	if (gpio_desc) {
+		gpiod_set_value(gpio_desc, value);
+	} else {
+		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
+						 con_id, gpio_index,
+						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
+		if (IS_ERR(gpio_desc)) {
+			drm_err(&dev_priv->drm,
+				"GPIO index %u request failed (%pe)\n",
+				gpio_index, gpio_desc);
+			return;
+		}
+
+		soc_gpio_table[gpio_index] = gpio_desc;
+	}
+}
+
 static void vlv_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_source, u8 gpio_index, bool value)
 {
@@ -348,26 +373,7 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 static void bxt_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_index, bool value)
 {
-	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	/* XXX: this table is a quick ugly hack. */
-	static struct gpio_desc *bxt_gpio_table[U8_MAX + 1];
-	struct gpio_desc *gpio_desc = bxt_gpio_table[gpio_index];
-
-	if (!gpio_desc) {
-		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
-						 NULL, gpio_index,
-						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
-		if (IS_ERR_OR_NULL(gpio_desc)) {
-			drm_err(&dev_priv->drm,
-				"GPIO index %u request failed (%ld)\n",
-				gpio_index, PTR_ERR(gpio_desc));
-			return;
-		}
-
-		bxt_gpio_table[gpio_index] = gpio_desc;
-	}
-
-	gpiod_set_value(gpio_desc, value);
+	soc_gpio_set_value(connector, NULL, gpio_index, value);
 }
 
 enum {