Am 27.09.2021 um 19:08 schrieb Maxime Ripard <maxime@cerno.tech>:

On Mon, Sep 27, 2021 at 06:44:24PM +0200, H. Nikolaus Schaller wrote:

From: Paul Boddie <paul@boddie.org.uk>

A specialisation of the generic Synopsys HDMI driver is employed for JZ4780
HDMI support. This requires a new driver, plus device tree and configuration
modifications.

+ regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v");
+
+ if (IS_ERR(regulator)) {
+ ret = PTR_ERR(regulator);
+
+ DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n",
+       "hdmi-5v", ret);
+ return ret;
+ }

This doesn't match your binding