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charset="utf-8" From: Wojciech Dubowik Add an optional output lvds data lanes property with two allowed values. The array <1 2 3 4> for standard layout and <4 3 2 1> for reversed lvds output lanes. The latter informs the driver that reverse lvds config option has to be set in config register for the respective output channel. Signed-off-by: Wojciech Dubowik Reviewed-by: Krzysztof Kozlowski --- .../bindings/display/bridge/ti,sn65dsi83.yaml | 52 +++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.= yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml index e69b6343a8eb..2693c0273f9a 100644 --- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml @@ -86,10 +86,62 @@ properties: description: Video port for LVDS Channel-A output (panel or bridge= ). $ref: '#/$defs/lvds-port' =20 + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Array of physical LVDS data lane indexes + oneOf: + - items: + - const: 1 + - const: 2 + - const: 3 + - const: 4 + description: | + This is the default layout + - items: + - const: 4 + - const: 3 + - const: 2 + - const: 1 + description: | + This is the reversed layout + port@3: description: Video port for LVDS Channel-B output (panel or bridge= ). $ref: '#/$defs/lvds-port' =20 + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + Array of physical LVDS data lane indexes + oneOf: + - items: + - const: 1 + - const: 2 + - const: 3 + - const: 4 + description: | + This is the default layout + - items: + - const: 4 + - const: 3 + - const: 2 + - const: 1 + description: | + This is the reversed layout + required: - port@0 - port@2 --=20 2.47.3 From nobody Sat Jul 25 21:59:15 2026 Received: from DUZPR83CU001.outbound.protection.outlook.com (mail-northeuropeazon11012014.outbound.protection.outlook.com [52.101.66.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7573E3AEB2C; 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charset="utf-8" From: Wojciech Dubowik The chip supports output lvds lanes in two orders, default <1 2 3 4> and <4 3 2 1>. Add parsing of an optional output lvds data-lanes property so we can inform chip that the lanes have been reversed. Signed-off-by: Wojciech Dubowik --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 50 +++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge= /ti-sn65dsi83.c index 42b451432bbb..4945d4c960c4 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -148,6 +148,18 @@ enum sn65dsi83_lvds_term { OHM_200 }; =20 +enum { + NORMAL_LANE_MAPPING, + REVERSE_LANE_MAPPING, +}; + +#define DATA_LANES_COUNT 4 + +static const int supported_data_lane_mapping[][DATA_LANES_COUNT] =3D { + [NORMAL_LANE_MAPPING] =3D { 1, 2, 3, 4 }, + [REVERSE_LANE_MAPPING] =3D { 4, 3, 2, 1}, +}; + enum sn65dsi83_model { MODEL_SN65DSI83, MODEL_SN65DSI84, @@ -163,6 +175,7 @@ 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 +657,10 @@ static void sn65dsi83_atomic_pre_enable(struct drm_bri= dge *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] ? @@ -832,10 +849,12 @@ static int sn65dsi83_parse_lvds_endpoint(struct sn65d= si83 *ctx, int channel) u32 lvds_vod_swing_clk[2] =3D { 0, 1000000 }; /* Set default near end terminataion to 200 Ohm */ u32 lvds_term =3D 200; + u32 data_lanes[DATA_LANES_COUNT]; int lvds_vod_swing_conf; int ret =3D 0; int ret_data; int ret_clock; + int i, j; =20 if (channel =3D=3D CHANNEL_A) endpoint_reg =3D 2; @@ -854,6 +873,37 @@ static int sn65dsi83_parse_lvds_endpoint(struct sn65ds= i83 *ctx, int channel) goto exit; } =20 + ret_data =3D of_property_read_u32_array(endpoint, "data-lanes", data_lane= s, + ARRAY_SIZE(data_lanes)); + if (ret_data !=3D 0 && ret_data !=3D -EINVAL) { + ret =3D ret_data; + goto exit; + } + + if (!ret_data) { + for (i =3D 0; i < ARRAY_SIZE(supported_data_lane_mapping); i++) { + for (j =3D 0; j < DATA_LANES_COUNT; j++) { + if (data_lanes[j] !=3D supported_data_lane_mapping[i][j]) + break; + } + + if (j =3D=3D DATA_LANES_COUNT) + break; + } + + switch (i) { + case NORMAL_LANE_MAPPING: + break; + case REVERSE_LANE_MAPPING: + ctx->lvds_reverse_lanes_conf[channel] =3D true; + break; + default: + dev_err(dev, "invalid data lanes mapping\n"); + ret =3D -EINVAL; + goto exit; + } + } + ret_data =3D 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 !=3D 0 && ret_data !=3D -EINVAL) { --=20 2.47.3