[PATCH 2/2] drm/bridge: ti-sn65dsi83: Add reverse lvds lanes property
From: Wojciech Dubowik
Date: Tue Jul 07 2026 - 03:03:23 EST
From: Wojciech Dubowik <Wojciech.Dubowik@xxxxxx>
Add parsing of lvds reverse lanes device tree property. When
set, the endpoint lvds data lanes are configured in <4 3 2 1>
order instead of default <1 2 3 4>. This is needed for layouts
where lanes have been swapped.
Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@xxxxxx>
---
drivers/gpu/drm/bridge/ti-sn65dsi83.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
index 42b451432bbb..2ab2764065c4 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -163,6 +163,7 @@ struct sn65dsi83 {
struct regulator *vcc;
bool lvds_dual_link;
bool lvds_dual_link_even_odd_swap;
+ bool lvds_reverse_lanes_conf[2];
int lvds_vod_swing_conf[2];
int lvds_term_conf[2];
int irq;
@@ -644,6 +645,10 @@ static void sn65dsi83_atomic_pre_enable(struct drm_bridge *bridge,
regmap_write(ctx->regmap, REG_LVDS_LANE,
(ctx->lvds_dual_link_even_odd_swap ?
REG_LVDS_LANE_EVEN_ODD_SWAP : 0) |
+ (ctx->lvds_reverse_lanes_conf[CHANNEL_A] ?
+ REG_LVDS_LANE_CHA_REVERSE_LVDS : 0) |
+ (ctx->lvds_reverse_lanes_conf[CHANNEL_B] ?
+ REG_LVDS_LANE_CHB_REVERSE_LVDS : 0) |
(ctx->lvds_term_conf[CHANNEL_A] ?
REG_LVDS_LANE_CHA_LVDS_TERM : 0) |
(ctx->lvds_term_conf[CHANNEL_B] ?
@@ -854,6 +859,9 @@ static int sn65dsi83_parse_lvds_endpoint(struct sn65dsi83 *ctx, int channel)
goto exit;
}
+ ctx->lvds_reverse_lanes_conf[channel] =
+ of_property_read_bool(endpoint, "ti,lvds-reverse-lanes");
+
ret_data = of_property_read_u32_array(endpoint, "ti,lvds-vod-swing-data-microvolt",
lvds_vod_swing_data, ARRAY_SIZE(lvds_vod_swing_data));
if (ret_data != 0 && ret_data != -EINVAL) {
--
2.47.3