Use drm_bridge_chain_get_last_bridge() instead of open coding a loop with
two invocations of drm_bridge_get_next_bridge() per iteration.
Besides being cleaner and more efficient, this change is necessary in
preparation for drm_bridge_get_next_bridge() to get a reference to the
returned bridge.
Reviewed-by: Maxime Ripard <mrip...@kernel.org>
Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com>
---
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
index
bea8346515b8c8ce150040f58d288ac564eeb563..8f7a0d46601a41e1bfc04587398b0f1536a6a16c
100644
--- a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
@@ -492,14 +492,12 @@ static int imx93_dsi_get_phy_configure_opts(struct
imx93_dsi *dsi,
static enum drm_mode_status
imx93_dsi_validate_mode(struct imx93_dsi *dsi, const struct drm_display_mode
*mode)
{
- struct drm_bridge *bridge = dw_mipi_dsi_get_bridge(dsi->dmd);
+ struct drm_bridge *dmd_bridge = dw_mipi_dsi_get_bridge(dsi->dmd);
+ struct drm_bridge *last_bridge __free(drm_bridge_put) =
+ drm_bridge_chain_get_last_bridge(dmd_bridge->encoder);
- /* Get the last bridge */
- while (drm_bridge_get_next_bridge(bridge))
- bridge = drm_bridge_get_next_bridge(bridge);
-
- if ((bridge->ops & DRM_BRIDGE_OP_DETECT) &&
- (bridge->ops & DRM_BRIDGE_OP_EDID)) {
+ if ((last_bridge->ops & DRM_BRIDGE_OP_DETECT) &&
+ (last_bridge->ops & DRM_BRIDGE_OP_EDID)) {
unsigned long pixel_clock_rate = mode->clock * 1000;
unsigned long rounded_rate;
--
2.50.1
