[PATCH v2] video: meson: dw-hdmi: do not fail probe if HDMI regulator is already enabled

[Neil Armstrong]

If the regulator is already enabled, this happens if the regulator
is set in regulator-always-on, regulator_set_enable() return -EALREADY.

Ignore the -EALREADY return since it's not an error.

Suggested-by: Jonas Karlman <jonas at kwiboo.se>
Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
---
Changes in v2:
- Switch to regulator_set_enable_if_allowed thanks to Jonas's suggestion
- Link to v1: https://lore.kernel.org/r/20241008-u-boot-video-fix-hdmi-supply-already-on-v1-1-3a12c73ff3f1@linaro.org
---
 drivers/video/meson/meson_dw_hdmi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/meson/meson_dw_hdmi.c b/drivers/video/meson/meson_dw_hdmi.c
index 587df7beb9b..1631dc38416 100644
--- a/drivers/video/meson/meson_dw_hdmi.c
+++ b/drivers/video/meson/meson_dw_hdmi.c
@@ -418,8 +418,8 @@ static int meson_dw_hdmi_probe(struct udevice *dev)
 	}
 
 	if (!ret) {
-		ret = regulator_set_enable(supply, true);
-		if (ret)
+		ret = regulator_set_enable_if_allowed(supply, true);
+		if (ret && ret != -ENOSYS)
 			return ret;
 	}
 #endif

---
base-commit: 28dc47038edc4e93f32d75a357131bcf01a18d85
change-id: 20241008-u-boot-video-fix-hdmi-supply-already-on-e6a9af27b1eb

Best regards,
-- 
Neil Armstrong <neil.armstrong at linaro.org>