From fc94224c2e0ae8d83ac511a3ef4962178505469d Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wenst@chromium.org>
Date: Thu, 21 Jul 2022 17:22:58 +0800
Subject: [PATCH] drm/bridge: parade-ps8640: Fix regulator supply order
Git-commit: fc94224c2e0ae8d83ac511a3ef4962178505469d
Patch-mainline: v6.1-rc1
References: git-fixes

The datasheet says that VDD12 must be enabled and at full voltage before
VDD33 is enabled.

Reorder the bulk regulator supply names so that VDD12 is enabled before
VDD33. Any enable ramp delays should be handled by setting proper
constraints on the regulators.

Fixes: bc1aee7fc8f0 ("drm/bridge: Add I2C based driver for ps8640 bridge")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220721092258.3397461-1-wenst@chromium.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/bridge/parade-ps8640.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -333,8 +333,8 @@ static int ps8640_probe(struct i2c_clien
 	if (IS_ERR(ps_bridge->panel_bridge))
 		return PTR_ERR(ps_bridge->panel_bridge);
 
-	ps_bridge->supplies[0].supply = "vdd33";
-	ps_bridge->supplies[1].supply = "vdd12";
+	ps_bridge->supplies[0].supply = "vdd12";
+	ps_bridge->supplies[1].supply = "vdd33";
 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),
 				      ps_bridge->supplies);
 	if (ret)