[PATCH 5.19 302/717] drm/bridge: parade-ps8640: Fix regulator supply order

Greg Kroah-Hartman
2022-10-22T08:05:12Z

From: Chen-Yu Tsai <wenst@chromium.org>

[ Upstream commit fc94224c2e0ae8d83ac511a3ef4962178505469d ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/bridge/parade-ps8640.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index edb939b14c04..38dcc606b499 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -596,8 +596,8 @@ static int ps8640_probe(struct i2c_client *client)
if (!ps_bridge)
return -ENOMEM;

- 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)
--
2.35.1