From patchwork Sat Sep 11 17:36:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Ogorchock X-Patchwork-Id: 12486563 X-Patchwork-Delegate: jikos@jikos.cz 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 D531BC4321E for ; Sat, 11 Sep 2021 17:37:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE3AB610CE for ; Sat, 11 Sep 2021 17:37:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233085AbhIKRiP (ORCPT ); Sat, 11 Sep 2021 13:38:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233074AbhIKRiM (ORCPT ); Sat, 11 Sep 2021 13:38:12 -0400 Received: from mail-qk1-x72e.google.com (mail-qk1-x72e.google.com [IPv6:2607:f8b0:4864:20::72e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D866C061757 for ; Sat, 11 Sep 2021 10:36:59 -0700 (PDT) Received: by mail-qk1-x72e.google.com with SMTP id p4so5807928qki.3 for ; Sat, 11 Sep 2021 10:36:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5bNPVPs0qalFclbMvkicJYSj0oxrSV7v3YeegIwtRW0=; b=OfIPZxasUbuoUgeauEbLlicXMURd4sIacLZS26chrgOPmLVyYB+bK1Kkgkt+GnFw7/ pMUd2ddeTdV5ZzMPI+iJrOvcccCSHGcGTnROUu2Jpn2uw15cDDo3/6KUc8dX554ZhqRU AbdCuUBGIerDqumAKLfsOcoSZRstK1OICR0KIrDYdzwu4GbgHqAHvDqS0GGhY+K3e1H+ mWEaGkojshiJtFPTx8CZydyLsiU6wZsNel1gbUX7S0llxlFTWviA2rcSzYrj3umHoHiq kCUVZeF/yqB/rzjvANcK8Ib+hlGJ+Z2yZR5xaaqLH6tOv7b+HglWg7m+hBVAB7GffnxH 5pDA== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=5bNPVPs0qalFclbMvkicJYSj0oxrSV7v3YeegIwtRW0=; b=StlOknr63WsIJu4I5/TaxR3lpSkEY3sNiPoF5Oez2NQ4OKFOPXtjM558n20OKYlwBI cBIVWYgISKbEwOof+/dPnZuN7oV6XvRt3metOFdaQZog8Oj8vEi3Q+2V+fxJ900hnAoR 2dqFpsdZU2zgNijny27aEAR+EzutcZMJvyida4p57SKVgu1ugeBZf5GvbaNmyeICaMUa DhliCbPjPMPosewNV1qkvy9OH5Mj/NpNxrYCB67MV3jNx9QmC++d+GYDJuPg+dEa4JsD g1dwibBLcyW7G2Gv597THBNgcLv9sGHS+nTKFpfaMY7HUGyz80ag3yBaI2tyvsg351vp IHnQ== X-Gm-Message-State: AOAM530mQCGRt/+11Fc1BNgf4fpE0/cGHbKc8pmAxp5mD/exCbtPGGFM ZnlkXpFlLMqzPm858dALntrCqtN9/8zHZg== X-Google-Smtp-Source: ABdhPJzlMGlcjXupOH5Sbm5xa/4eQKTRB5MGJBMJ/f/peyXx3ur7eov8+we5urieeRsdwJvTS5rblQ== X-Received: by 2002:a05:620a:29d5:: with SMTP id s21mr2907037qkp.243.1631381818469; Sat, 11 Sep 2021 10:36:58 -0700 (PDT) Received: from Arrakis.djogorchock.com (pool-173-68-59-147.nycmny.fios.verizon.net. [173.68.59.147]) by smtp.gmail.com with ESMTPSA id m5sm1594286qkn.33.2021.09.11.10.36.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Sep 2021 10:36:57 -0700 (PDT) From: "Daniel J. Ogorchock" To: linux-input@vger.kernel.org Cc: thunderbird2k@gmail.com, blaws05@gmail.com, benjamin.tissoires@redhat.com, jikos@kernel.org, Roderick.Colenbrander@sony.com, svv@google.com, s.jegen@gmail.com, carmueller@gmail.com, pgriffais@valvesoftware.com, hadess@hadess.net, pobrn@protonmail.com, lee.jones@linaro.org, "Daniel J. Ogorchock" Subject: [PATCH v16 06/16] HID: nintendo: improve subcommand reliability Date: Sat, 11 Sep 2021 13:36:29 -0400 Message-Id: <20210911173639.5688-7-djogorchock@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210911173639.5688-1-djogorchock@gmail.com> References: <20210911173639.5688-1-djogorchock@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The controller occasionally doesn't respond to subcommands. It appears that it's dropping them. To improve reliability, this patch attempts one retry in the case of a synchronous send timeout. In testing, this has resolved all timeout failures (most common for LED setting and rumble setting subcommands). The 1 second timeout is excessively long for rumble and LED subcommands, so the timeout has been made a param for joycon_hid_send_sync. Most subcommands continue to use the 1s timeout, since they can result in long response times. Rumble and LED setting subcommands have been reduced to 250ms, since response times for them are much quicker (and this significantly reduces the observable impact in the case of a retry being required). Signed-off-by: Daniel J. Ogorchock --- drivers/hid/hid-nintendo.c | 66 ++++++++++++++++++++++++-------------- 1 file changed, 42 insertions(+), 24 deletions(-) diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c index 1a1bb18a02162..a95943c2fc6c0 100644 --- a/drivers/hid/hid-nintendo.c +++ b/drivers/hid/hid-nintendo.c @@ -377,27 +377,45 @@ static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len) return ret; } -static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len) +static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len, + u32 timeout) { int ret; + int tries = 2; - ret = __joycon_hid_send(ctlr->hdev, data, len); - if (ret < 0) { - memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); - return ret; - } + /* + * The controller occasionally seems to drop subcommands. In testing, + * doing one retry after a timeout appears to always work. + */ + while (tries--) { + ret = __joycon_hid_send(ctlr->hdev, data, len); + if (ret < 0) { + memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); + return ret; + } - if (!wait_event_timeout(ctlr->wait, ctlr->received_resp, HZ)) { - hid_dbg(ctlr->hdev, "synchronous send/receive timed out\n"); - memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); - return -ETIMEDOUT; + ret = wait_event_timeout(ctlr->wait, ctlr->received_resp, + timeout); + if (!ret) { + hid_dbg(ctlr->hdev, + "synchronous send/receive timed out\n"); + if (tries) { + hid_dbg(ctlr->hdev, + "retrying sync send after timeout\n"); + } + memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); + ret = -ETIMEDOUT; + } else { + ret = 0; + break; + } } ctlr->received_resp = false; - return 0; + return ret; } -static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd) +static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout) { int ret; u8 buf[2] = {JC_OUTPUT_USB_CMD}; @@ -405,7 +423,7 @@ static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd) buf[1] = cmd; ctlr->usb_ack_match = cmd; ctlr->msg_type = JOYCON_MSG_TYPE_USB; - ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf)); + ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf), timeout); if (ret) hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret); return ret; @@ -413,7 +431,7 @@ static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd) static int joycon_send_subcmd(struct joycon_ctlr *ctlr, struct joycon_subcmd_request *subcmd, - size_t data_len) + size_t data_len, u32 timeout) { int ret; unsigned long flags; @@ -431,7 +449,7 @@ static int joycon_send_subcmd(struct joycon_ctlr *ctlr, ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD; ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd, - sizeof(*subcmd) + data_len); + sizeof(*subcmd) + data_len, timeout); if (ret < 0) hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret); else @@ -450,7 +468,7 @@ static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on) req->data[0] = (flash << 4) | on; hid_dbg(ctlr->hdev, "setting player leds\n"); - return joycon_send_subcmd(ctlr, req, 1); + return joycon_send_subcmd(ctlr, req, 1, HZ/4); } static const u16 DFLT_STICK_CAL_CEN = 2000; @@ -481,7 +499,7 @@ static int joycon_request_calibration(struct joycon_ctlr *ctlr) data[4] = JC_CAL_DATA_SIZE; hid_dbg(ctlr->hdev, "requesting cal data\n"); - ret = joycon_send_subcmd(ctlr, req, 5); + ret = joycon_send_subcmd(ctlr, req, 5, HZ); if (ret) { hid_warn(ctlr->hdev, "Failed to read stick cal, using defaults; ret=%d\n", @@ -571,7 +589,7 @@ static int joycon_set_report_mode(struct joycon_ctlr *ctlr) req->data[0] = 0x30; /* standard, full report mode */ hid_dbg(ctlr->hdev, "setting controller report mode\n"); - return joycon_send_subcmd(ctlr, req, 1); + return joycon_send_subcmd(ctlr, req, 1, HZ); } static int joycon_enable_rumble(struct joycon_ctlr *ctlr) @@ -584,7 +602,7 @@ static int joycon_enable_rumble(struct joycon_ctlr *ctlr) req->data[0] = 0x01; /* note: 0x00 would disable */ hid_dbg(ctlr->hdev, "enabling rumble\n"); - return joycon_send_subcmd(ctlr, req, 1); + return joycon_send_subcmd(ctlr, req, 1, HZ/4); } static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val) @@ -1088,7 +1106,7 @@ static int joycon_home_led_brightness_set(struct led_classdev *led, hid_dbg(hdev, "setting home led brightness\n"); mutex_lock(&ctlr->output_mutex); - ret = joycon_send_subcmd(ctlr, req, 5); + ret = joycon_send_subcmd(ctlr, req, 5, HZ/4); mutex_unlock(&ctlr->output_mutex); return ret; @@ -1381,16 +1399,16 @@ static int nintendo_hid_probe(struct hid_device *hdev, mutex_lock(&ctlr->output_mutex); /* if handshake command fails, assume ble pro controller */ if (hdev->product == USB_DEVICE_ID_NINTENDO_PROCON && - !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE)) { + !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) { hid_dbg(hdev, "detected USB controller\n"); /* set baudrate for improved latency */ - ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M); + ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ); if (ret) { hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret); goto err_mutex; } /* handshake */ - ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE); + ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ); if (ret) { hid_err(hdev, "Failed handshake; ret=%d\n", ret); goto err_mutex; @@ -1399,7 +1417,7 @@ static int nintendo_hid_probe(struct hid_device *hdev, * Set no timeout (to keep controller in USB mode). * This doesn't send a response, so ignore the timeout. */ - joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT); + joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10); } /* get controller calibration data, and parse it */