From patchwork Mon Aug 14 04:29:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reka Norman X-Patchwork-Id: 713979 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B4428C04A94 for ; Mon, 14 Aug 2023 04:36:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233110AbjHNEgM (ORCPT ); Mon, 14 Aug 2023 00:36:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233176AbjHNEgA (ORCPT ); Mon, 14 Aug 2023 00:36:00 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B0EE10DE for ; Sun, 13 Aug 2023 21:35:57 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id d9443c01a7336-1bdb08e9057so27226815ad.0 for ; Sun, 13 Aug 2023 21:35:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1691987757; x=1692592557; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=RY/s3NWQ7cJzGN8eFznQZ8SqTKIy2WegmbdnvBwyBH8=; b=SXacTqbHuT+AjmyNe6Va4MrxTMBJyGMXsvJvygFMoxKz0dWO616KLB3kCWyZUEmEvc mwq8cGWywviFmXuyN+F/lPz6lCQHsoSpi8bJgAdGW2K0u128UNciaC0aVWCfuKxnD6eE g19zdVHzJ1XKWhdqgvoFW1rvRAaofMBW92gtU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691987757; x=1692592557; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=RY/s3NWQ7cJzGN8eFznQZ8SqTKIy2WegmbdnvBwyBH8=; b=Lw0S5NQxS2iaHmjWRmLwtTlixVQ1SdlDvqtHT/PwQMpBNlBDP93RxwCUIPn+uZNwk6 r1y+oYe9yCQC6b5t5B/3T/OqHtCcrzARqfLAH6lkbLwtJWZFpI7Yysti6oDDqGC8xEhK OHZCCb5GOGHD6kB/yGHP9plBlE7fB81FDQxeNaGLx7/3ceFEQAAiLk8c31LPd9NqqTpU 4YAskvlbLzQbUMkYXaCUTQJUYPZYcZAvsWzkWaFfrtviWtAcHigpIuHCfM5Sv3TqsYRb +OfUzZffK+n3B9rkQXWfJvhR+p0IFQDG2EViN5oH6lZpxNQoON8lp/G296yNb9BYtK7z oLzA== X-Gm-Message-State: AOJu0YwFCBS2pFyJR/U/xooUEnEt5iY870F1sjIU37Db/Kj9IhSNIYUA +FoejNezin0Z+E2G5iRi1DTGUQ== X-Google-Smtp-Source: AGHT+IGrujxISxygnWJjuw3SivTfzonRA4bepBiLTx5xRLmooiSveQabsuX7REbMesjW6mUXOd8xew== X-Received: by 2002:a17:903:228b:b0:1bd:ea15:e3a9 with SMTP id b11-20020a170903228b00b001bdea15e3a9mr989447plh.48.1691987757148; Sun, 13 Aug 2023 21:35:57 -0700 (PDT) Received: from rekanorman3.syd.corp.google.com ([2401:fa00:9:14:4ae6:d1a4:27c2:80ff]) by smtp.gmail.com with ESMTPSA id ju17-20020a170903429100b001bdb0483e65sm6761865plb.265.2023.08.13.21.35.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Aug 2023 21:35:56 -0700 (PDT) From: Reka Norman To: Hans Verkuil Cc: Neil Armstrong , Daisuke Nojiri , Stefan Adolfsson , Reka Norman , Benson Leung , Guenter Roeck , Mauro Carvalho Chehab , chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH 4/9] media: cros-ec-cec: Support multiple ports in write command Date: Mon, 14 Aug 2023 14:29:13 +1000 Message-ID: <20230814043140.1108917-5-rekanorman@chromium.org> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog In-Reply-To: <20230814043140.1108917-1-rekanorman@chromium.org> References: <20230814043140.1108917-1-rekanorman@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add a v1 of the CEC write command which contains a port parameter. Check which versions of the write command the EC supports and use the highest supported version. If it only supports v0, check that there is only one port. With v0, the EC will assume all write commands are for port 0. Signed-off-by: Reka Norman --- .../media/cec/platform/cros-ec/cros-ec-cec.c | 54 +++++++++++++++++-- .../linux/platform_data/cros_ec_commands.h | 12 +++++ 2 files changed, 63 insertions(+), 3 deletions(-) diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c index e969031e1e0e..d674a432dfdd 100644 --- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c +++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c @@ -47,12 +47,14 @@ struct cros_ec_cec_port { * * @cros_ec: Pointer to EC device * @notifier: Notifier info for responding to EC events + * @write_cmd_version: Highest supported version of EC_CMD_CEC_WRITE_MSG. * @num_ports: Number of CEC ports * @ports: Array of ports */ struct cros_ec_cec { struct cros_ec_device *cros_ec; struct notifier_block notifier; + int write_cmd_version; int num_ports; struct cros_ec_cec_port *ports[EC_CEC_MAX_PORTS]; }; @@ -141,12 +143,22 @@ static int cros_ec_cec_transmit(struct cec_adapter *adap, u8 attempts, struct cros_ec_cec *cros_ec_cec = port->cros_ec_cec; struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; struct ec_params_cec_write params; + struct ec_params_cec_write_v1 params_v1; int ret; - memcpy(params.msg, cec_msg->msg, cec_msg->len); + if (cros_ec_cec->write_cmd_version == 0) { + memcpy(params.msg, cec_msg->msg, cec_msg->len); + ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_WRITE_MSG, ¶ms, + cec_msg->len, NULL, 0); + } else { + params_v1.port = port->port_num; + params_v1.msg_len = cec_msg->len; + memcpy(params_v1.msg, cec_msg->msg, cec_msg->len); + ret = cros_ec_cmd(cros_ec, cros_ec_cec->write_cmd_version, + EC_CMD_CEC_WRITE_MSG, ¶ms_v1, + sizeof(params_v1), NULL, 0); + } - ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_WRITE_MSG, ¶ms, - cec_msg->len, NULL, 0); if (ret < 0) { dev_err(cros_ec->dev, "error writing CEC msg on EC: %d\n", ret); @@ -285,6 +297,38 @@ static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev, #endif +static int cros_ec_cec_get_write_cmd_version(struct cros_ec_cec *cros_ec_cec) +{ + struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec; + struct ec_params_get_cmd_versions_v1 params = { + .cmd = EC_CMD_CEC_WRITE_MSG, + }; + struct ec_response_get_cmd_versions response; + int ret; + + ret = cros_ec_cmd(cros_ec, 1, EC_CMD_GET_CMD_VERSIONS, ¶ms, + sizeof(params), &response, sizeof(response)); + if (ret < 0) { + dev_err(cros_ec->dev, + "error getting CEC write command version: %d\n", ret); + return ret; + } + + if (response.version_mask & EC_VER_MASK(1)) { + cros_ec_cec->write_cmd_version = 1; + } else { + if (cros_ec_cec->num_ports != 1) { + dev_err(cros_ec->dev, + "v0 write command only supports 1 port, %d reported\n", + cros_ec_cec->num_ports); + return -EINVAL; + } + cros_ec_cec->write_cmd_version = 0; + } + + return 0; +} + static int cros_ec_cec_init_port(struct device *dev, struct cros_ec_cec *cros_ec_cec, int port_num, struct device *hdmi_dev, @@ -354,6 +398,10 @@ static int cros_ec_cec_probe(struct platform_device *pdev) cros_ec_cec->num_ports = CEC_NUM_PORTS; + ret = cros_ec_cec_get_write_cmd_version(cros_ec_cec); + if (ret) + return ret; + for (int i = 0; i < cros_ec_cec->num_ports; i++) { ret = cros_ec_cec_init_port(&pdev->dev, cros_ec_cec, i, hdmi_dev, conn); diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h index e8bb05db360f..9a0c6e28f370 100644 --- a/include/linux/platform_data/cros_ec_commands.h +++ b/include/linux/platform_data/cros_ec_commands.h @@ -4451,6 +4451,18 @@ struct ec_params_cec_write { uint8_t msg[MAX_CEC_MSG_LEN]; } __ec_align1; +/** + * struct ec_params_cec_write_v1 - Message to write to the CEC bus + * @port: CEC port to write the message on + * @msg_len: length of msg in bytes + * @msg: message content to write to the CEC bus + */ +struct ec_params_cec_write_v1 { + uint8_t port; + uint8_t msg_len; + uint8_t msg[MAX_CEC_MSG_LEN]; +} __ec_align1; + /* Set various CEC parameters */ #define EC_CMD_CEC_SET 0x00BA