[PATCH v2 09/12] drm/bridge: synopsys: dw-mipi-dsi: Remove a redundant check on existence of bridge->encoder

Sui Jingfeng
2024-05-13T15:31:51Z

In the dw_mipi_dsi_bridge_attach() function, the check on the existence
of bridge->encoder is not necessary, as it has already been checked in
the drm_bridge_attach() function invocked by previous bridge or KMS driver.
The previous drm_bridge_attach() will quit with a negative error code
returned if it fails for some reasons, hence, it is guaranteed that the
.encoder member of the struct drm_bridge is not NULL when
dw_mipi_dsi_bridge_attach() function gets called.

Remove the redundant checking codes "if (!bridge->encoder) { ... }".

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 824fb3c65742..c4e9d96933dc 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -1071,11 +1071,6 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge,
{
struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);

- if (!bridge->encoder) {
- DRM_ERROR("Parent encoder object not found\n");
- return -ENODEV;
- }
-
/* Set the encoder type as caller does not know it */
bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI;

--
2.43.0