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drm/bridge: imx93-mipi-dsi: use drm_bridge_chain_get_last_bridge()

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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 <mripard@kernel.org>
Reviewed-by: Liu Ying <victor.liu@nxp.com>
Link: https://lore.kernel.org/r/20250801-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v2-3-888912b0be13@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
This commit is contained in:
Luca Ceresoli 2025-08-01 19:05:25 +02:00
parent d77ad5178e
commit 5849eff7f0
1 changed files with 5 additions and 7 deletions
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12
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
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@ -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;