[PATCH 6.1 226/473] drm/bridge: lt8912b: Dont log an error when DSI host cant be found

Greg Kroah-Hartman
2024-06-06T14:15:45Z

From: Nícolas F. R. A. Prado <nfraprado@collabora.com>

[ Upstream commit b3b4695ff47c4964d4ccb930890c9ffd8e455e20 ]

Given that failing to find a DSI host causes the driver to defer probe,
make use of dev_err_probe() to log the reason. This makes the defer
probe reason available and avoids alerting userspace about something
that is not necessarily an error.

Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415-anx7625-defer-log-no-dsi-host-v3-3-619a28148e5c@collabora.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/bridge/lontium-lt8912b.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index ac76c23635892..55a7fa4670a7a 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -485,10 +485,8 @@ static int lt8912_attach_dsi(struct lt8912 *lt)
};

host = of_find_mipi_dsi_host_by_node(lt->host_node);
- if (!host) {
- dev_err(dev, "failed to find dsi host\n");
- return -EPROBE_DEFER;
- }
+ if (!host)
+ return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");

dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
if (IS_ERR(dsi)) {
--
2.43.0