From patchwork Tue Dec 3 08:58:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrej Picej X-Patchwork-Id: 13891942 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A555BE6C61C for ; Tue, 3 Dec 2024 08:58:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 25D6F10E98D; Tue, 3 Dec 2024 08:58:55 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=norik.com header.i=@norik.com header.b="l32co7a+"; dkim-atps=neutral Received: from cpanel.siel.si (cpanel.siel.si [46.19.9.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id F168110E98C for ; Tue, 3 Dec 2024 08:58:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=norik.com; s=default; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=n7ps5hHUEyNPix9x2ti12jd8VGdE1MaH46+QldCC9TM=; b=l32co7a+CMBSHkqle13YReDRID aPgCl+3Hz6xvOA5ll8Nga98E4iPEMLw2lzrjD8jFAQe0cpaS4gGh+LuQMIFGxRvQNN+lbcyNORMt/ 1L0mR8rvxW1IpjD1g5NDsmRAxyNayb8rsBU70HNVJ0e55p7oFrKAb4bvuPJthyZ/nehGw+NOqEJpp Io13eiiJpI/0yCx9O+H9a7X6tJ1WVoTz4vv9qIZU9NTOKSlgYRBjegrnYMKuSNpoNRuHRtnJtXjA3 h1O+JrdJDCw0rnOp3N1CHThY8E+oENLCjBENukkf3ajMhRYu3aX/jsBf+ZETtt7KY4neWagokWlHo zUsN2rFg==; Received: from [89.212.21.243] (port=47386 helo=and-HP-Z4..) by cpanel.siel.si with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1tIOk7-00BGOq-19; Tue, 03 Dec 2024 09:58:50 +0100 From: Andrej Picej To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, marex@denx.de Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, upstream@lists.phytec.de Subject: [PATCH v2 1/3] dt-bindings: drm/bridge: ti-sn65dsi83: Add properties for ti, lvds-vod-swing Date: Tue, 3 Dec 2024 09:58:20 +0100 Message-Id: <20241203085822.2475138-2-andrej.picej@norik.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241203085822.2475138-1-andrej.picej@norik.com> References: <20241203085822.2475138-1-andrej.picej@norik.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.freedesktop.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add properties which can be used to specify LVDS differential output voltage. Since this also depends on near-end signal termination also include property which sets this. LVDS differential output voltage is specified with an array (min, max), which should match the one from connected device. Signed-off-by: Andrej Picej --- Changes in v2: - move LVDS port schema to a $defs and reference it from there - properties are now defined in microvolts/ohms - use 1 property for data-lane and 1 for clock-lane LVDS voltage swing - add 1 property which sets LVDS near-end termination - since major change was done change the authorship to myself --- .../bindings/display/bridge/ti,sn65dsi83.yaml | 36 +++++++++++++++++-- 1 file changed, 33 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml index 48a97bb3e2e0..6da9b6e3beb9 100644 --- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml @@ -80,12 +80,12 @@ properties: - const: 4 port@2: - $ref: /schemas/graph.yaml#/properties/port description: Video port for LVDS Channel-A output (panel or bridge). + $ref: '#/$defs/lvds-port' port@3: - $ref: /schemas/graph.yaml#/properties/port description: Video port for LVDS Channel-B output (panel or bridge). + $ref: '#/$defs/lvds-port' required: - port@0 @@ -96,6 +96,36 @@ required: - reg - ports +$defs: + lvds-port: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + ti,lvds-termination-ohms: + description: The value of near end differential termination in ohms. + enum: [100, 200] + default: 200 + + ti,lvds-vod-swing-clock-microvolt: + description: LVDS diferential output voltage for clock + lanes in microvolts. + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 2 + maxItems: 2 + + ti,lvds-vod-swing-data-microvolt: + description: LVDS diferential output voltage for data + lanes in microvolts. + $ref: /schemas/types.yaml#/definitions/uint32-array + minItems: 2 + maxItems: 2 + allOf: - if: properties: @@ -120,7 +150,7 @@ allOf: properties: port@1: false -additionalProperties: false +additionalProperties: true examples: - | From patchwork Tue Dec 3 08:58:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrej Picej X-Patchwork-Id: 13891943 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 02952E6C61C for ; Tue, 3 Dec 2024 08:58:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7F84510E98E; Tue, 3 Dec 2024 08:58:59 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=norik.com header.i=@norik.com header.b="Was5siNq"; dkim-atps=neutral Received: from cpanel.siel.si (cpanel.siel.si [46.19.9.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id C94CC10E98E for ; 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Tue, 03 Dec 2024 09:58:56 +0100 From: Andrej Picej To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, marex@denx.de Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, upstream@lists.phytec.de Subject: [PATCH v2 2/3] drm/bridge: ti-sn65dsi83: Add ti, lvds-vod-swing optional properties Date: Tue, 3 Dec 2024 09:58:21 +0100 Message-Id: <20241203085822.2475138-3-andrej.picej@norik.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241203085822.2475138-1-andrej.picej@norik.com> References: <20241203085822.2475138-1-andrej.picej@norik.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.freedesktop.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a optional properties to change LVDS output voltage. This should not be static as this depends mainly on the connected display voltage requirement. We have three properties: - "ti,lvds-termination-ohms", which sets near end termination, - "ti,lvds-vod-swing-data-microvolt" and - "ti,lvds-vod-swing-clock-microvolt" which both set LVDS differential output voltage for data and clock lanes. They are defined as an array with min and max values. The appropriate bitfiled will be set if selected constraints can be met. If "ti,lvds-termination-ohms" is not defined the default of 200 Ohm near end termination will be used. Selecting only one: "ti,lvds-vod-swing-data-microvolt" or "ti,lvds-vod-swing-clock-microvolt" can be done, but the output voltage constraint for only data/clock lanes will be met. Setting both is recommended. Signed-off-by: Andrej Picej --- Changes in v2: - use datasheet tables to get the proper configuration - since major change was done change the authorship to myself --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 144 +++++++++++++++++++++++++- 1 file changed, 141 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index 57a7ed13f996..44445d7ad52a 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -132,6 +132,16 @@ #define REG_IRQ_STAT_CHA_SOT_BIT_ERR BIT(2) #define REG_IRQ_STAT_CHA_PLL_UNLOCK BIT(0) +enum sn65dsi83_channel { + CHANNEL_A, + CHANNEL_B +}; + +enum sn65dsi83_lvds_term { + OHM_100, + OHM_200 +}; + enum sn65dsi83_model { MODEL_SN65DSI83, MODEL_SN65DSI84, @@ -147,6 +157,10 @@ struct sn65dsi83 { struct regulator *vcc; bool lvds_dual_link; bool lvds_dual_link_even_odd_swap; + int lvdsA_vod_swing_conf; + int lvdsB_vod_swing_conf; + int lvdsA_term_conf; + int lvdsB_term_conf; }; static const struct regmap_range sn65dsi83_readable_ranges[] = { @@ -237,6 +251,36 @@ static const struct regmap_config sn65dsi83_regmap_config = { .max_register = REG_IRQ_STAT, }; +static const int lvds_vod_swing_data_table[2][4][2] = { + { /* 100 Ohm */ + { 180000, 313000 }, + { 215000, 372000 }, + { 250000, 430000 }, + { 290000, 488000 }, + }, + { /* 200 Ohm */ + { 150000, 261000 }, + { 200000, 346000 }, + { 250000, 428000 }, + { 300000, 511000 }, + }, +}; + +static const int lvds_vod_swing_clock_table[2][4][2] = { + { /* 100 Ohm */ + { 140000, 244000 }, + { 168000, 290000 }, + { 195000, 335000 }, + { 226000, 381000 }, + }, + { /* 200 Ohm */ + { 117000, 204000 }, + { 156000, 270000 }, + { 195000, 334000 }, + { 234000, 399000 }, + }, +}; + static struct sn65dsi83 *bridge_to_sn65dsi83(struct drm_bridge *bridge) { return container_of(bridge, struct sn65dsi83, bridge); @@ -435,12 +479,16 @@ static void sn65dsi83_atomic_pre_enable(struct drm_bridge *bridge, val |= REG_LVDS_FMT_LVDS_LINK_CFG; regmap_write(ctx->regmap, REG_LVDS_FMT, val); - regmap_write(ctx->regmap, REG_LVDS_VCOM, 0x05); + regmap_write(ctx->regmap, REG_LVDS_VCOM, + REG_LVDS_VCOM_CHA_LVDS_VOD_SWING(ctx->lvdsA_vod_swing_conf) | + REG_LVDS_VCOM_CHB_LVDS_VOD_SWING(ctx->lvdsB_vod_swing_conf)); regmap_write(ctx->regmap, REG_LVDS_LANE, (ctx->lvds_dual_link_even_odd_swap ? REG_LVDS_LANE_EVEN_ODD_SWAP : 0) | - REG_LVDS_LANE_CHA_LVDS_TERM | - REG_LVDS_LANE_CHB_LVDS_TERM); + (ctx->lvdsA_term_conf ? + REG_LVDS_LANE_CHA_LVDS_TERM : 0) | + (ctx->lvdsB_term_conf ? + REG_LVDS_LANE_CHB_LVDS_TERM : 0)); regmap_write(ctx->regmap, REG_LVDS_CM, 0x00); le16val = cpu_to_le16(mode->hdisplay); @@ -576,10 +624,96 @@ static const struct drm_bridge_funcs sn65dsi83_funcs = { .atomic_get_input_bus_fmts = sn65dsi83_atomic_get_input_bus_fmts, }; +static int sn65dsi83_select_lvds_vod_swing(struct device *dev, + u32 lvds_vod_swing_data[2], u32 lvds_vod_swing_clk[2], u8 lvds_term) +{ + int i; + + for (i = 0; i <= 3; i++) { + if (lvds_vod_swing_data_table[lvds_term][i][0] >= lvds_vod_swing_data[0] && + lvds_vod_swing_data_table[lvds_term][i][1] <= lvds_vod_swing_data[1] && + lvds_vod_swing_clock_table[lvds_term][i][0] >= lvds_vod_swing_clk[0] && + lvds_vod_swing_clock_table[lvds_term][i][1] <= lvds_vod_swing_clk[1]) + return i; + } + + dev_err(dev, "failed to find appropriate LVDS_VOD_SWING configuration\n"); + return -EINVAL; +} + +static int sn65dsi83_parse_lvds_endpoint(struct sn65dsi83 *ctx, int channel) +{ + struct device *dev = ctx->dev; + struct device_node *endpoint; + /* Set so the property can be freely selected if not defined */ + u32 lvds_vod_swing_data[2] = { 0, 1000 }; + u32 lvds_vod_swing_clk[2] = { 0, 1000 }; + u32 lvds_term = 200; + u8 lvds_term_conf; + int endpoint_reg; + int lvds_vod_swing_conf; + int ret = 0; + int ret_data; + int ret_clock; + + if (channel == CHANNEL_A) + endpoint_reg = 2; + else + endpoint_reg = 3; + + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, endpoint_reg, -1); + of_property_read_u32(endpoint, "ti,lvds-termination-ohms", &lvds_term); + + if (lvds_term == 200) + lvds_term_conf = OHM_200; + else + lvds_term_conf = OHM_100; + + if (channel == CHANNEL_A) + ctx->lvdsA_term_conf = lvds_term_conf; + else + ctx->lvdsB_term_conf = lvds_term_conf; + + ret_data = of_property_read_u32_array(endpoint, + "ti,lvds-vod-swing-data-microvolt", lvds_vod_swing_data, + ARRAY_SIZE(lvds_vod_swing_data)); + ret_clock = of_property_read_u32_array(endpoint, + "ti,lvds-vod-swing-clock-microvolt", lvds_vod_swing_clk, + ARRAY_SIZE(lvds_vod_swing_clk)); + /* If any of the two properties is defined. */ + if (!ret_data || !ret_clock) { + lvds_vod_swing_conf = sn65dsi83_select_lvds_vod_swing(dev, + lvds_vod_swing_data, lvds_vod_swing_clk, + lvds_term_conf); + if (lvds_vod_swing_conf < 0) { + ret = lvds_vod_swing_conf; + goto exit; + } + if (channel == CHANNEL_A) + ctx->lvdsA_vod_swing_conf = lvds_vod_swing_conf; + else + ctx->lvdsB_vod_swing_conf = lvds_vod_swing_conf; + } + ret = 0; +exit: + of_node_put(endpoint); + return ret; +} + static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model) { struct drm_bridge *panel_bridge; struct device *dev = ctx->dev; + int ret; + + ctx->lvdsA_vod_swing_conf = 0x1; + ctx->lvdsB_vod_swing_conf = 0x1; + ctx->lvdsA_term_conf = 0x1; + ctx->lvdsB_term_conf = 0x1; + + ret = sn65dsi83_parse_lvds_endpoint(ctx, CHANNEL_A); + if (ret < 0) + return ret; ctx->lvds_dual_link = false; ctx->lvds_dual_link_even_odd_swap = false; @@ -587,6 +721,10 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model) struct device_node *port2, *port3; int dual_link; + ret = sn65dsi83_parse_lvds_endpoint(ctx, CHANNEL_B); + if (ret < 0) + return ret; + port2 = of_graph_get_port_by_id(dev->of_node, 2); port3 = of_graph_get_port_by_id(dev->of_node, 3); dual_link = drm_of_lvds_get_dual_link_pixel_order(port2, port3); From patchwork Tue Dec 3 08:58:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrej Picej X-Patchwork-Id: 13891944 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 18A47E6C61A for ; 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b=TPJeg2VV1cgYtaO2h7wremtQvj qL3ctHhy1Sj52LsasyWcjhQWpc2auaXTx0as2Qss09E3Dx7MG7Aig5HMmKpIHZ58B0x7sdj9sBokB smW0bH6/5fHucLRTZEi87lKF4UnqlqAZ41HzSItHprzDcORb1MWom8L0AscNKlMD512km36JWDpwc QIymxeOPTW/F2yR7qQwmKE1Aljp5k1K5iu42xjf18dtZN7Jyb86zp8dR3tGkm+yJWy7kQgb+k47rJ 1HBut63dbP6xSk0xpRnGPNei/UD2vvj2pgj3LKBIB3X6isXWklj6e1cyS0kn0lTQoCjTh73Y8n1wT GEVnFYoA==; Received: from [89.212.21.243] (port=47386 helo=and-HP-Z4..) by cpanel.siel.si with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1tIOkD-00BGOq-0l; Tue, 03 Dec 2024 09:58:56 +0100 From: Andrej Picej To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, marex@denx.de Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, upstream@lists.phytec.de Subject: [PATCH v2 3/3] arm64: dts: imx8mm-phyboard-polis-peb-av-10: Set lvds-vod-swing Date: Tue, 3 Dec 2024 09:58:22 +0100 Message-Id: <20241203085822.2475138-4-andrej.picej@norik.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241203085822.2475138-1-andrej.picej@norik.com> References: <20241203085822.2475138-1-andrej.picej@norik.com> MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cpanel.siel.si X-AntiAbuse: Original Domain - lists.freedesktop.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - norik.com X-Get-Message-Sender-Via: cpanel.siel.si: authenticated_id: andrej.picej@norik.com X-Authenticated-Sender: cpanel.siel.si: andrej.picej@norik.com X-Source: X-Source-Args: X-Source-Dir: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Set custom differential output voltage for LVDS, to fulfill requirements of the connected display. LVDS differential voltage for data-lanes and clock output has to be between 200 mV and 600 mV. Driver sets 200 Ohm near-end termination by default. Signed-off-by: Andrej Picej --- Changes in v2: - use new properties from previous patches --- .../boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso b/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso index a9de42cf14be..8bf9cc553bea 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso +++ b/arch/arm64/boot/dts/freescale/imx8mm-phyboard-polis-peb-av-10.dtso @@ -186,6 +186,8 @@ port@2 { reg = <2>; bridge_out: endpoint { remote-endpoint = <&panel_in>; + ti,lvds-vod-swing-clock-microvolt = <200000 600000>; + ti,lvds-vod-swing-data-microvolt = <200000 600000>; }; }; };