From patchwork Tue Jan 18 09:19:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12716069 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 2249BC433F5 for ; Tue, 18 Jan 2022 09:20:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DF75610EBB2; Tue, 18 Jan 2022 09:20:09 +0000 (UTC) Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7D5C710EBCD for ; Tue, 18 Jan 2022 09:20:08 +0000 (UTC) Received: by mail-pf1-x433.google.com with SMTP id 78so12532737pfu.10 for ; Tue, 18 Jan 2022 01:20:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=4Tc7nnQFnAv/x3r/yYMhvZGN3p803fSMZ3UHYukD4rU=; b=X+6DQO0pW7rjDivnpTkFLCBkdyUpXqZAgRWD5x9ScFAktHLD6IQNAq1Tnd+GjPMMGK lDSUn+jhguAw2J5zCUYI4wyhwhDS7IgX7ZHKpH8unSKa7eNktQLvVRcfZHxnlkC6H9nd 2QR17HyXWQmIb7qcUzrHWjxdx61Ip+z/mP28w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=4Tc7nnQFnAv/x3r/yYMhvZGN3p803fSMZ3UHYukD4rU=; b=fyFvO0SyqumY649S6Ds0y/y69QNs9o+u5kHjpQE3eysXLNoyLynUfGHsYyP4me7uwO bfMtira7AsI9JnFWz/uAHBn0rG5VvO16MjuE+UnqT/bRY6JlPsB7zlvHeSn3PZHfd/59 QdTSc6Ac3ufPc+Z3eHbO00BsotpfseGxaosf85Yv4Ad8UFTpLd44z5LbVuPHVgCa9k7u LnVDHIdl/GEF28tgSdDrw0dxM6pg1/j8wwUa8uIwvDCgNpf1+6s9XPj3IkdEXW20m/JL GeN/+/Np4sXSiTkj4atzAHsPobHDIKvMpH3i8ZjPZ2OuYYjqKZqrqW4xbMmDSx0YEyTt UqkA== X-Gm-Message-State: AOAM5333ucPfba6hQgsvzHW5dSD8ivHWhvvGCRXKQnquwV1YUIG4SB8V mey6skLkZIYeSEHCgHhL4fBNnA== X-Google-Smtp-Source: ABdhPJw7jlQ2Ag32Zt8K2uoq3k7yK6ILEAQ/XmypXWxAE1vcYdtPMjCdzq02zJvTlRRl4mXMHKxCZA== X-Received: by 2002:a63:6e86:: with SMTP id j128mr22352192pgc.6.1642497607761; Tue, 18 Jan 2022 01:20:07 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:4448:8072:97f1:64dd]) by smtp.gmail.com with ESMTPSA id y1sm14691501pgs.4.2022.01.18.01.20.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jan 2022 01:20:07 -0800 (PST) From: Hsin-Yi Wang To: Robert Foss , Rob Herring , Xin Ji Subject: [PATCH v4 1/4] drm/bridge: anx7625: send DPCD command to downstream Date: Tue, 18 Jan 2022 17:19:59 +0800 Message-Id: <20220118092002.4267-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.34.1.703.g22d0c6ccf7-goog MIME-Version: 1.0 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: , Cc: devicetree@vger.kernel.org, Jernej Skrabec , Neil Armstrong , David Airlie , Jonas Karlman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrzej Hajda , Laurent Pinchart , Sam Ravnborg , Maxime Ripard Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Xin Ji Send DPCD command to downstream before anx7625 power down, let downstream monitor enter into standby mode. Signed-off-by: Xin Ji Signed-off-by: Hsin-Yi Wang --- v3->v4: Use common DP_AUX_NATIVE_READ/WRITE Previously in: https://patchwork.kernel.org/project/dri-devel/patch/1f36f8bf0a48fb2bba17bacec23700e58c1d407d.1641891874.git.xji@analogixsemi.com/ --- drivers/gpu/drm/bridge/analogix/anx7625.c | 42 +++++++++++++++++++---- drivers/gpu/drm/bridge/analogix/anx7625.h | 2 -- 2 files changed, 35 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 76662fce4ce61d..17b23940549a42 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -129,6 +129,23 @@ 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) + dev_err(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) @@ -214,8 +231,8 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return 0; } -static int anx7625_aux_dpcd_read(struct anx7625_data *ctx, - u32 address, u8 len, u8 *buf) +static int anx7625_aux_dpcd_trans(struct anx7625_data *ctx, u8 op, + u32 address, u8 len, u8 *buf) { struct device *dev = &ctx->client->dev; int ret; @@ -231,8 +248,7 @@ static int anx7625_aux_dpcd_read(struct anx7625_data *ctx, addrm = (address >> 8) & 0xFF; addrh = (address >> 16) & 0xFF; - cmd = DPCD_CMD(len, DPCD_READ); - cmd = ((len - 1) << 4) | 0x09; + cmd = DPCD_CMD(len, op); /* Set command and length */ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, @@ -246,6 +262,9 @@ static int anx7625_aux_dpcd_read(struct anx7625_data *ctx, ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, AP_AUX_ADDR_19_16, addrh); + if (op == DP_AUX_NATIVE_WRITE) + 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); @@ -255,14 +274,17 @@ static int anx7625_aux_dpcd_read(struct anx7625_data *ctx, return -EIO; } - usleep_range(2000, 2100); - ret = wait_aux_op_finish(ctx); if (ret) { dev_err(dev, "aux IO error: wait aux op finish.\n"); return ret; } + /* Write done */ + if (op == DP_AUX_NATIVE_WRITE) + return 0; + + /* Read done, read out dpcd data */ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START, len, buf); if (ret < 0) { @@ -845,7 +867,7 @@ static int anx7625_hdcp_enable(struct anx7625_data *ctx) } /* Read downstream capability */ - anx7625_aux_dpcd_read(ctx, 0x68028, 1, &bcap); + anx7625_aux_dpcd_trans(ctx, DP_AUX_NATIVE_READ, 0x68028, 1, &bcap); if (!(bcap & 0x01)) { pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap); return 0; @@ -918,6 +940,7 @@ 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"); @@ -929,6 +952,11 @@ 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); + + dev_dbg(dev, "notify downstream enter into standby\n"); + /* Downstream monitor enter into standby mode */ + data = 2; + ret |= anx7625_aux_dpcd_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h index 56165f5b254c14..64a8ab56529404 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -242,8 +242,6 @@ #define AP_AUX_COMMAND 0x27 /* com+len */ #define LENGTH_SHIFT 4 -#define DPCD_READ 0x09 -#define DPCD_WRITE 0x08 #define DPCD_CMD(len, cmd) ((((len) - 1) << LENGTH_SHIFT) | (cmd)) /* Bit 0&1: 3D video structure */