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Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 75 +++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 65cc05982f82..53d2f0d0ee30 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -124,6 +124,23 @@ static int anx7625_reg_write(struct anx7625_data *ctx, return ret; } +static int anx7625_reg_block_write(struct anx7625_data *ctx, + struct i2c_client *client, + u8 reg_addr, u8 len, u8 *buf) +{ + int ret; + struct device *dev = &client->dev; + + i2c_access_workaround(ctx, client); + + ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf); + if (ret < 0) + DRM_DEV_ERROR(dev, "write i2c block failed id=%x\n:%x", + client->addr, reg_addr); + + return ret; +} + static int anx7625_write_or(struct anx7625_data *ctx, struct i2c_client *client, u8 offset, u8 mask) @@ -195,6 +212,55 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return val; } +static int anx7625_aux_dpcd_write(struct anx7625_data *ctx, + u8 addrh, u8 addrm, u8 addrl, + u8 len, u8 *buf) +{ + struct device *dev = &ctx->client->dev; + int ret; + u8 cmd; + + if (len > MAX_DPCD_BUFFER_SIZE) { + DRM_DEV_ERROR(dev, "exceed aux buffer len.\n"); + return -EINVAL; + } + + cmd = ((len - 1) << 4) | 0x08; + + /* Set command and length */ + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_COMMAND, cmd); + + /* Set aux access address */ + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_7_0, addrl); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_15_8, addrm); + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_19_16, addrh); + + /* Set write data */ + ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_BUFF_START, len, buf); + /* Enable aux access */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); + if (ret < 0) { + DRM_DEV_ERROR(dev, "cannot access aux related register.\n"); + return -EIO; + } + + usleep_range(2000, 2100); + + ret = wait_aux_op_finish(ctx); + if (ret) { + DRM_DEV_ERROR(dev, "aux IO error: wait aux op finish.\n"); + return ret; + } + + return 0; +} + static int anx7625_video_mute_control(struct anx7625_data *ctx, u8 status) { @@ -617,6 +683,7 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; int ret; + u8 data; DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n"); @@ -628,8 +695,16 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f); ret |= anx7625_video_mute_control(ctx, 1); + + DRM_DEV_DEBUG_DRIVER(dev, "notify downstream enter into standby\n"); + + /* Downstream monitor enter into standby mode */ + data = 2; + ret |= anx7625_aux_dpcd_write(ctx, 0x00, 0x06, 0x00, 1, &data); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); + + return; } static int sp_tx_rst_aux(struct anx7625_data *ctx) -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6934EC433B4 for ; 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Fri, 9 Apr 2021 05:35:41 +0000 Date: Fri, 9 Apr 2021 13:35:32 +0800 From: Xin Ji To: Robert Foss , Nicolas Boichat , Andrzej Hajda Subject: [PATCH 1/1] drm/bridge: anx7625: send DPCD command to downstream Message-ID: <18ec1a440eb71e4f91c0932cd0fadddd2e9a4c0f.1617937551.git.xji@analogixsemi.com> Content-Disposition: inline X-Originating-IP: [60.251.58.79] X-ClientProxiedBy: HK2PR02CA0201.apcprd02.prod.outlook.com (2603:1096:201:20::13) To BY5PR04MB6739.namprd04.prod.outlook.com (2603:10b6:a03:229::8) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from anxtwsw-Precision-3640-Tower (60.251.58.79) by HK2PR02CA0201.apcprd02.prod.outlook.com (2603:1096:201:20::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4020.16 via Frontend Transport; Fri, 9 Apr 2021 05:35:40 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2df1cc92-17de-425f-ef25-08d8fb194fc8 X-MS-TrafficTypeDiagnostic: BYAPR04MB3928: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:254; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" Send DPCD command to downstream before anx7625 power down, tell downstream into standby mode. Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 75 +++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 65cc05982f82..53d2f0d0ee30 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -124,6 +124,23 @@ static int anx7625_reg_write(struct anx7625_data *ctx, return ret; } +static int anx7625_reg_block_write(struct anx7625_data *ctx, + struct i2c_client *client, + u8 reg_addr, u8 len, u8 *buf) +{ + int ret; + struct device *dev = &client->dev; + + i2c_access_workaround(ctx, client); + + ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf); + if (ret < 0) + DRM_DEV_ERROR(dev, "write i2c block failed id=%x\n:%x", + client->addr, reg_addr); + + return ret; +} + static int anx7625_write_or(struct anx7625_data *ctx, struct i2c_client *client, u8 offset, u8 mask) @@ -195,6 +212,55 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return val; } +static int anx7625_aux_dpcd_write(struct anx7625_data *ctx, + u8 addrh, u8 addrm, u8 addrl, + u8 len, u8 *buf) +{ + struct device *dev = &ctx->client->dev; + int ret; + u8 cmd; + + if (len > MAX_DPCD_BUFFER_SIZE) { + DRM_DEV_ERROR(dev, "exceed aux buffer len.\n"); + return -EINVAL; + } + + cmd = ((len - 1) << 4) | 0x08; + + /* Set command and length */ + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_COMMAND, cmd); + + /* Set aux access address */ + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_7_0, addrl); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_15_8, addrm); + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_19_16, addrh); + + /* Set write data */ + ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_BUFF_START, len, buf); + /* Enable aux access */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); + if (ret < 0) { + DRM_DEV_ERROR(dev, "cannot access aux related register.\n"); + return -EIO; + } + + usleep_range(2000, 2100); + + ret = wait_aux_op_finish(ctx); + if (ret) { + DRM_DEV_ERROR(dev, "aux IO error: wait aux op finish.\n"); + return ret; + } + + return 0; +} + static int anx7625_video_mute_control(struct anx7625_data *ctx, u8 status) { @@ -617,6 +683,7 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; int ret; + u8 data; DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n"); @@ -628,8 +695,16 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f); ret |= anx7625_video_mute_control(ctx, 1); + + DRM_DEV_DEBUG_DRIVER(dev, "notify downstream enter into standby\n"); + + /* Downstream monitor enter into standby mode */ + data = 2; + ret |= anx7625_aux_dpcd_write(ctx, 0x00, 0x06, 0x00, 1, &data); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); + + return; } static int sp_tx_rst_aux(struct anx7625_data *ctx) -- 2.25.1 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8B51C433B4 for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Send DPCD command to downstream before anx7625 power down, tell downstream into standby mode. Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 75 +++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 65cc05982f82..53d2f0d0ee30 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -124,6 +124,23 @@ static int anx7625_reg_write(struct anx7625_data *ctx, return ret; } +static int anx7625_reg_block_write(struct anx7625_data *ctx, + struct i2c_client *client, + u8 reg_addr, u8 len, u8 *buf) +{ + int ret; + struct device *dev = &client->dev; + + i2c_access_workaround(ctx, client); + + ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf); + if (ret < 0) + DRM_DEV_ERROR(dev, "write i2c block failed id=%x\n:%x", + client->addr, reg_addr); + + return ret; +} + static int anx7625_write_or(struct anx7625_data *ctx, struct i2c_client *client, u8 offset, u8 mask) @@ -195,6 +212,55 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return val; } +static int anx7625_aux_dpcd_write(struct anx7625_data *ctx, + u8 addrh, u8 addrm, u8 addrl, + u8 len, u8 *buf) +{ + struct device *dev = &ctx->client->dev; + int ret; + u8 cmd; + + if (len > MAX_DPCD_BUFFER_SIZE) { + DRM_DEV_ERROR(dev, "exceed aux buffer len.\n"); + return -EINVAL; + } + + cmd = ((len - 1) << 4) | 0x08; + + /* Set command and length */ + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_COMMAND, cmd); + + /* Set aux access address */ + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_7_0, addrl); + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_15_8, addrm); + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client, + AP_AUX_ADDR_19_16, addrh); + + /* Set write data */ + ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, + AP_AUX_BUFF_START, len, buf); + /* Enable aux access */ + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client, + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN); + if (ret < 0) { + DRM_DEV_ERROR(dev, "cannot access aux related register.\n"); + return -EIO; + } + + usleep_range(2000, 2100); + + ret = wait_aux_op_finish(ctx); + if (ret) { + DRM_DEV_ERROR(dev, "aux IO error: wait aux op finish.\n"); + return ret; + } + + return 0; +} + static int anx7625_video_mute_control(struct anx7625_data *ctx, u8 status) { @@ -617,6 +683,7 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; int ret; + u8 data; DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n"); @@ -628,8 +695,16 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f); ret |= anx7625_video_mute_control(ctx, 1); + + DRM_DEV_DEBUG_DRIVER(dev, "notify downstream enter into standby\n"); + + /* Downstream monitor enter into standby mode */ + data = 2; + ret |= anx7625_aux_dpcd_write(ctx, 0x00, 0x06, 0x00, 1, &data); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); + + return; } static int sp_tx_rst_aux(struct anx7625_data *ctx) -- 2.25.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel