[PATCH 5.10 157/545] drm/bridge: tc358767: Move (e)DP bridge endpoint parsing into dedicated function

Greg Kroah-Hartman
2022-08-19T16:04:39Z

From: Marek Vasut <marex@denx.de>

[ Upstream commit 8478095a8c4bcea3c83b0767d6c9127434160761 ]

The TC358767/TC358867/TC9595 are all capable of operating in multiple
modes, DPI-to-(e)DP, DSI-to-(e)DP, DSI-to-DPI. Only the first mode is
currently supported. In order to support the rest of the modes without
making the tc_probe() overly long, split the bridge endpoint parsing
into dedicated function, where the necessary logic to detect the bridge
mode based on which endpoints are connected, can be implemented.

Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Lucas Stach <l.stach@pengutronix.de> # In both DPI to eDP and DSI to DPI mode.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220329085015.39159-7-marex@denx.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/bridge/tc358767.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 34a3e4e9f717..9af564cf92e5 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1535,19 +1535,12 @@ static irqreturn_t tc_irq_handler(int irq, void *arg)
return IRQ_HANDLED;
}

-static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+static int tc_probe_edp_bridge_endpoint(struct tc_data *tc)
{
- struct device *dev = &client->dev;
+ struct device *dev = tc->dev;
struct drm_panel *panel;
- struct tc_data *tc;
int ret;

- tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
- if (!tc)
- return -ENOMEM;
-
- tc->dev = dev;
-
/* port@2 is the output port */
ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, NULL);
if (ret && ret != -ENODEV)
@@ -1566,6 +1559,25 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
tc->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
}

+ return ret;
+}
+
+static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct tc_data *tc;
+ int ret;
+
+ tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->dev = dev;
+
+ ret = tc_probe_edp_bridge_endpoint(tc);
+ if (ret)
+ return ret;
+
/* Shut down GPIO is optional */
tc->sd_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
if (IS_ERR(tc->sd_gpio))
--
2.35.1