From patchwork Tue May 18 12:35:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam McNally X-Patchwork-Id: 12264725 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 57712C433ED for ; Tue, 18 May 2021 12:36:03 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 00A826124C for ; Tue, 18 May 2021 12:36:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 00A826124C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5437A6EB55; Tue, 18 May 2021 12:36:02 +0000 (UTC) Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by gabe.freedesktop.org (Postfix) with ESMTPS id F39156EB55 for ; Tue, 18 May 2021 12:36:00 +0000 (UTC) Received: by mail-pf1-x42e.google.com with SMTP id 22so6898026pfv.11 for ; Tue, 18 May 2021 05:36:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qpU5qP98b9v91H9ZdN9F8lHTpC0IiyKJ829V83s2fV8=; b=ixa4pl16t4BtDmwwdv+WUIxjwtcmcyN2miN7qTc6SWNRl7Yzo6oet71Bwhzcyd5PVt Y78ou856oCVYwfiHfDoJsAsqeT6HaDlDRZpYzqHIXAc1eklhFB62OJyK4glg8oYUgOEq iyx3MwUWKcch+weXKROuLSa4Vtk6A/auo7R8Q= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qpU5qP98b9v91H9ZdN9F8lHTpC0IiyKJ829V83s2fV8=; b=tPfgWBJ/g/PTdE9KazeKuMDabxkR7U0+RHt0qbz1lNx0sPv2HQ/8oMGkLCpNjOhqrp 6n2MBIM19IQW+wpw113i52PRK44OBwPA51mLq+4R4YZwAGC05Ip2n/mdYCzzD7r8cTei voqhCdK7K22noysGTleBYHcnJzMKBFjXwDCK4B08dSXLO41kXIqr3yJHO6cSn5fulOlz VJ1ZMsXR111Xx01+99BSOHVUCf7X7+f1fslAB38v0v8nTIg7YlOyp74czlll9SuWY7mH EIuEz9aZFcRIC00JMzwm4+rgP8d13KYtUmAhbZFVcV4n7ZxnIr6nSgYhjg6EOrCnEl6k YH7w== X-Gm-Message-State: AOAM5328umi7cVXO8G64pM5UZamiSWykccLCRki6K/Tlx6ibkluJ5fR0 voWfQSwmqRw8Inegg9TG2RWT0Q== X-Google-Smtp-Source: ABdhPJyn5jxI9LtAnxhhI2unNORlfnfZYRnMpHFxCCuHQbd6xvAnaHwB5zQYYAdOQM9lsGHyX6oJ4g== X-Received: by 2002:a63:4b19:: with SMTP id y25mr4776454pga.313.1621341360600; Tue, 18 May 2021 05:36:00 -0700 (PDT) Received: from localhost ([2401:fa00:9:14:d4a6:9a84:c26c:6e50]) by smtp.gmail.com with UTF8SMTPSA id o3sm12826667pgh.22.2021.05.18.05.35.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 May 2021 05:36:00 -0700 (PDT) From: Sam McNally To: LKML Subject: [PATCH v4 2/3] drm/dp_mst: Add support for sink event notify messages Date: Tue, 18 May 2021 22:35:29 +1000 Message-Id: <20210518223508.v4.2.I8693156f555875e5c8342e86ab37ce968dfdd277@changeid> X-Mailer: git-send-email 2.31.1.751.gd2f1c929bd-goog In-Reply-To: <20210518223508.v4.1.I6f50a7996687318ba298c24a3663c8be7dd432c7@changeid> References: <20210518223508.v4.1.I6f50a7996687318ba298c24a3663c8be7dd432c7@changeid> 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: Thomas Zimmermann , David Airlie , Anshuman Gupta , Hans Verkuil , Sam McNally , Sean Paul , dri-devel@lists.freedesktop.org, Lee Jones Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Sink event notify messages are used for MST CEC IRQs. Add parsing support for sink event notify messages in preparation for handling MST CEC IRQs. Signed-off-by: Sam McNally --- Changes in v4: - Changed logging to use drm_dbg_kms() - Added self-test drivers/gpu/drm/drm_dp_mst_topology.c | 57 ++++++++++++++++++- .../drm/selftests/test-drm_dp_mst_helper.c | 8 +++ include/drm/drm_dp_mst_helper.h | 14 +++++ 3 files changed, 78 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 573f39a3dc16..29aad3b6b31a 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -473,6 +473,20 @@ drm_dp_encode_sideband_req(const struct drm_dp_sideband_msg_req_body *req, idx++; break; } + case DP_SINK_EVENT_NOTIFY: { + const struct drm_dp_sink_event_notify *msg; + + msg = &req->u.sink_event; + buf[idx] = (msg->port_number & 0xf) << 4; + idx++; + memcpy(&raw->msg[idx], msg->guid, 16); + idx += 16; + buf[idx] = (msg->event_id & 0xff00) >> 8; + idx++; + buf[idx] = (msg->event_id & 0xff); + idx++; + break; + } } raw->cur_len = idx; } @@ -719,6 +733,12 @@ drm_dp_dump_sideband_msg_req_body(const struct drm_dp_sideband_msg_req_body *req (int)ARRAY_SIZE(req->u.resource_stat.guid), req->u.resource_stat.guid, req->u.resource_stat.available_pbn); break; + case DP_SINK_EVENT_NOTIFY: + P("port=%d guid=%*ph event=%d", + req->u.sink_event.port_number, + (int)ARRAY_SIZE(req->u.sink_event.guid), req->u.sink_event.guid, + req->u.sink_event.event_id); + break; default: P("???\n"); break; @@ -1163,6 +1183,30 @@ static bool drm_dp_sideband_parse_resource_status_notify(const struct drm_dp_mst return false; } +static bool drm_dp_sideband_parse_sink_event_notify(const struct drm_dp_mst_topology_mgr *mgr, + struct drm_dp_sideband_msg_rx *raw, + struct drm_dp_sideband_msg_req_body *msg) +{ + int idx = 1; + + msg->u.sink_event.port_number = (raw->msg[idx] & 0xf0) >> 4; + idx++; + if (idx > raw->curlen) + goto fail_len; + + memcpy(msg->u.sink_event.guid, &raw->msg[idx], 16); + idx += 16; + if (idx > raw->curlen) + goto fail_len; + + msg->u.sink_event.event_id = (raw->msg[idx] << 8) | (raw->msg[idx + 1]); + idx++; + return true; +fail_len: + drm_dbg_kms(mgr->dev, "sink event notify parse length fail %d %d\n", idx, raw->curlen); + return false; +} + bool drm_dp_sideband_parse_req(const struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_sideband_msg_rx *raw, struct drm_dp_sideband_msg_req_body *msg) @@ -1175,6 +1219,8 @@ bool drm_dp_sideband_parse_req(const struct drm_dp_mst_topology_mgr *mgr, return drm_dp_sideband_parse_connection_status_notify(mgr, raw, msg); case DP_RESOURCE_STATUS_NOTIFY: return drm_dp_sideband_parse_resource_status_notify(mgr, raw, msg); + case DP_SINK_EVENT_NOTIFY: + return drm_dp_sideband_parse_sink_event_notify(mgr, raw, msg); default: drm_err(mgr->dev, "Got unknown request 0x%02x (%s)\n", msg->req_type, drm_dp_mst_req_type_str(msg->req_type)); @@ -4106,6 +4152,8 @@ drm_dp_mst_process_up_req(struct drm_dp_mst_topology_mgr *mgr, guid = msg->u.conn_stat.guid; else if (msg->req_type == DP_RESOURCE_STATUS_NOTIFY) guid = msg->u.resource_stat.guid; + else if (msg->req_type == DP_SINK_EVENT_NOTIFY) + guid = msg->u.sink_event.guid; if (guid) mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid); @@ -4177,7 +4225,8 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) drm_dp_sideband_parse_req(mgr, &mgr->up_req_recv, &up_req->msg); if (up_req->msg.req_type != DP_CONNECTION_STATUS_NOTIFY && - up_req->msg.req_type != DP_RESOURCE_STATUS_NOTIFY) { + up_req->msg.req_type != DP_RESOURCE_STATUS_NOTIFY && + up_req->msg.req_type != DP_SINK_EVENT_NOTIFY) { drm_dbg_kms(mgr->dev, "Received unknown up req type, ignoring: %x\n", up_req->msg.req_type); kfree(up_req); @@ -4205,6 +4254,12 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) drm_dbg_kms(mgr->dev, "Got RSN: pn: %d avail_pbn %d\n", res_stat->port_number, res_stat->available_pbn); + } else if (up_req->msg.req_type == DP_SINK_EVENT_NOTIFY) { + const struct drm_dp_sink_event_notify *sink_event = + &up_req->msg.u.sink_event; + + drm_dbg_kms(mgr->dev, "Got SEN: pn: %d event_id %d\n", + sink_event->port_number, sink_event->event_id); } up_req->hdr = mgr->up_req_recv.initial_hdr; diff --git a/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c b/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c index 22aaedc63aec..84b1411460d7 100644 --- a/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c +++ b/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c @@ -163,6 +163,7 @@ sideband_msg_req_encode_decode(struct drm_dp_sideband_msg_req_body *in) switch (in->req_type) { case DP_CONNECTION_STATUS_NOTIFY: case DP_RESOURCE_STATUS_NOTIFY: + case DP_SINK_EVENT_NOTIFY: memcpy(&rxmsg->msg, txmsg->msg, ARRAY_SIZE(rxmsg->msg)); rxmsg->curlen = txmsg->cur_len; if (!drm_dp_sideband_parse_req(mgr, rxmsg, out)) { @@ -385,10 +386,17 @@ int igt_dp_mst_sideband_msg_req_decode(void *unused) in.u.resource_stat.available_pbn = 0xcdef; DO_TEST(); + in.req_type = DP_SINK_EVENT_NOTIFY; + in.u.sink_event.port_number = 0xf; + get_random_bytes(in.u.sink_event.guid, sizeof(in.u.sink_event.guid)); + in.u.sink_event.event_id = 0xcdef; + DO_TEST(); + #undef DO_TEST #define DO_TEST(req_type) FAIL_ON(!sideband_msg_req_parse(req_type)) DO_TEST(DP_CONNECTION_STATUS_NOTIFY); DO_TEST(DP_RESOURCE_STATUS_NOTIFY); + DO_TEST(DP_SINK_EVENT_NOTIFY); DO_TEST(DP_REMOTE_I2C_WRITE); #undef DO_TEST diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h index c87a829b6498..96c87f761129 100644 --- a/include/drm/drm_dp_mst_helper.h +++ b/include/drm/drm_dp_mst_helper.h @@ -439,6 +439,19 @@ struct drm_dp_resource_status_notify { u16 available_pbn; }; +#define DP_SINK_EVENT_PANEL_REPLAY_ACTIVE_FRAME_CRC_ERROR BIT(0) +#define DP_SINK_EVENT_PANEL_REPLAY_RFB_STORAGE_ERROR BIT(1) +#define DP_SINK_EVENT_DSC_RC_BUFFER_UNDER_RUN BIT(2) +#define DP_SINK_EVENT_DSC_RC_BUFFER_OVERFLOW BIT(3) +#define DP_SINK_EVENT_DSC_CHUNK_LENGTH_ERROR BIT(4) +#define DP_SINK_EVENT_CEC_IRQ_EVENT BIT(5) + +struct drm_dp_sink_event_notify { + u8 port_number; + u8 guid[16]; + u16 event_id; +}; + struct drm_dp_query_payload_ack_reply { u8 port_number; u16 allocated_pbn; @@ -450,6 +463,7 @@ struct drm_dp_sideband_msg_req_body { struct drm_dp_connection_status_notify conn_stat; struct drm_dp_port_number_req port_num; struct drm_dp_resource_status_notify resource_stat; + struct drm_dp_sink_event_notify sink_event; struct drm_dp_query_payload query_payload; struct drm_dp_allocate_payload allocate_payload;