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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B12DAC433EF for ; Sun, 27 Mar 2022 22:42:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237224AbiC0WoP (ORCPT ); Sun, 27 Mar 2022 18:44:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237161AbiC0Wna (ORCPT ); Sun, 27 Mar 2022 18:43:30 -0400 Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2799150060 for ; Sun, 27 Mar 2022 15:41:36 -0700 (PDT) Received: by mail-wr1-x434.google.com with SMTP id a1so17890065wrh.10 for ; Sun, 27 Mar 2022 15:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=AYDLTANXWRzGnB+sIMp01grvGk/SH+cQkVVSn0Jme+Sp0Hdpav8Wlpi1giPYDpywOB f6+XMddOzg//0bbLhJQCLnkfAV0Ch64BSBs9oAbxmdSQ0aFw6LF+1eH4sCXHn+oCWJK9 HAUXrfbNKPFhPTj2hSbp90b+fYh/KO1rXKZin8vWp75AbJyk6dGaR6kJh+zhJpkys+jQ Pk2FkzjQ/WrzkwnRLJGntCY5EY+d50uMvlP3KirJCkkCRn482UEZBSRYDpkR0UJ46DUu laMi+vD1+SNfyKxtrkIT5iuFhSooYpFxBbnxJgCDry2m5x5p4qdMYjJqUvDmSn3XsbJm bITQ== 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=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=ACJnrtbInDeek5Bb6jWzUCpbde3RmHarOHWOTSrAfnHiteIBsTJF66YDtmYQ5CgmG5 +mEoeEHXT6drpD/me1zedq5C+lnO7QwWwQYR8p9PpK0L9kuufv0J24iAL2raAfkZpjQg XaRZHVCKVbge+F+7tnlC8HWIPzB8dxsJMMUnlqXWwS2EJqNwrmWcILN/dwCurzfLAuMb bSp5/Xxz6SNkCTTMakF1aEivL4zsO7Hd8IiAn1D30r9SvSGTzOcViZ+Z47YuyhXJJOBs qzpWhkdfEjxc66qAlflEu293Oi+0SG+QkPLIUCUNt2F42tn0/riUptuskdKDKmzumoAa cC2A== X-Gm-Message-State: AOAM5305eYPxO9NCQkxJQDlRK7Jiumo1We86E1Bts/D2BbdyoG7dAH+k KEtEnV9ydhgNO219ws0rfa3MYg== X-Google-Smtp-Source: ABdhPJysfkYMrMgHwodSSnzMkqerBi1jwSuIF2iefWJ4/FcOg7MYEeM+UjIlCWYlQv0Ck0GULeS7uA== X-Received: by 2002:a5d:6daf:0:b0:204:12b6:a15 with SMTP id u15-20020a5d6daf000000b0020412b60a15mr19676354wrs.340.1648420894641; Sun, 27 Mar 2022 15:41:34 -0700 (PDT) Received: from localhost.localdomain (2a02-8440-6341-357e-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6341:357e:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id v5-20020adfe4c5000000b001edc1e5053esm10400867wrm.82.2022.03.27.15.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Mar 2022 15:41:34 -0700 (PDT) From: Guillaume Ranquet To: airlied@linux.ie, angelogioacchino.delregno@collabora.com, chunfeng.yun@mediatek.com, chunkuang.hu@kernel.org, ck.hu@mediatek.com, daniel@ffwll.ch, deller@gmx.de, jitao.shi@mediatek.com, kishon@ti.com, krzk+dt@kernel.org, maarten.lankhorst@linux.intel.com, matthias.bgg@gmail.com, mripard@kernel.org, p.zabel@pengutronix.de, robh+dt@kernel.org, tzimmermann@suse.de, vkoul@kernel.org Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, markyacoub@google.com Subject: [PATCH v9 21/22] drm/mediatek: change the aux retries times when receiving AUX_DEFER Date: Mon, 28 Mar 2022 00:39:26 +0200 Message-Id: <20220327223927.20848-22-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220327223927.20848-1-granquet@baylibre.com> References: <20220327223927.20848-1-granquet@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jitao Shi DP 1.4a Section 2.8.7.1.5.6.1: A DP Source device shall retry at least seven times upon receiving AUX_DEFER before giving up the AUX transaction. Aux should retry to send msg whether how many bytes. Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet --- drivers/gpu/drm/mediatek/mtk_dp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index e099491cc6a4..7a197c4a7143 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2016,7 +2016,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, bool is_read; u8 request; size_t accessed_bytes = 0; - int retry = 3, ret = 0; + int retry, ret = 0; mtk_dp = container_of(mtk_aux, struct mtk_dp, aux); @@ -2050,14 +2050,21 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, } if (msg->size == 0) { - ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, - msg->address + accessed_bytes, - msg->buffer + accessed_bytes, 0); + retry = 32; + while (retry--) { + ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, + msg->address + accessed_bytes, + msg->buffer + accessed_bytes, 0); + if (ret == 0) + break; + usleep_range(500, 600); + } } else { while (accessed_bytes < msg->size) { size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES, msg->size - accessed_bytes); + retry = 32; while (retry--) { ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, @@ -2066,7 +2073,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, to_access); if (ret == 0) break; - usleep_range(50, 100); + usleep_range(500, 600); } if (!retry || ret) { drm_info(mtk_dp->drm_dev, -- 2.34.1 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 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 6A497C43217 for ; Sun, 27 Mar 2022 22:42:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D367B10E9D7; Sun, 27 Mar 2022 22:42:07 +0000 (UTC) Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2C34E10E59C for ; Sun, 27 Mar 2022 22:41:36 +0000 (UTC) Received: by mail-wr1-x434.google.com with SMTP id t11so17906004wrm.5 for ; Sun, 27 Mar 2022 15:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=AYDLTANXWRzGnB+sIMp01grvGk/SH+cQkVVSn0Jme+Sp0Hdpav8Wlpi1giPYDpywOB f6+XMddOzg//0bbLhJQCLnkfAV0Ch64BSBs9oAbxmdSQ0aFw6LF+1eH4sCXHn+oCWJK9 HAUXrfbNKPFhPTj2hSbp90b+fYh/KO1rXKZin8vWp75AbJyk6dGaR6kJh+zhJpkys+jQ Pk2FkzjQ/WrzkwnRLJGntCY5EY+d50uMvlP3KirJCkkCRn482UEZBSRYDpkR0UJ46DUu laMi+vD1+SNfyKxtrkIT5iuFhSooYpFxBbnxJgCDry2m5x5p4qdMYjJqUvDmSn3XsbJm bITQ== 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=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=y5vnHoVidjZHcXTDb+8WKTLJl0R6k1y7GIBQt/mT+HwSYABO4m9VM9D93cQtqWh4G0 ctO3eEGocLquJoXEN27UesBhZvinPIh/n3RZJSRo3/bXOJBl41zNPKXdCR6yPIcCWs4D V0V2Ty+2JOqd+08DnrNeZEIyBtB9MLYtkBK97fun3BDpyYNOloBCbuCU8nSlAPjPOpPh XYwhZj/vHPHyXAbik8N4UVMlNnXtgCWHDef9VsYBszpIF6uYh0EeWfloc92f7Qs5M+7o UVZEU+nnw9ueyBhmO8KJU0XBxgF0EABVHjFHQHCnfxngb+vnGlDFLon/9CTCS394NNg8 BIwQ== X-Gm-Message-State: AOAM530oCL48IggRdokGuPyYqKhVehoPsF6ZuMBO5ruRu+pbk344wbS2 6Nu4ahjQnsUNTMmQSSMIbRolvw== X-Google-Smtp-Source: ABdhPJysfkYMrMgHwodSSnzMkqerBi1jwSuIF2iefWJ4/FcOg7MYEeM+UjIlCWYlQv0Ck0GULeS7uA== X-Received: by 2002:a5d:6daf:0:b0:204:12b6:a15 with SMTP id u15-20020a5d6daf000000b0020412b60a15mr19676354wrs.340.1648420894641; Sun, 27 Mar 2022 15:41:34 -0700 (PDT) Received: from localhost.localdomain (2a02-8440-6341-357e-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6341:357e:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id v5-20020adfe4c5000000b001edc1e5053esm10400867wrm.82.2022.03.27.15.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Mar 2022 15:41:34 -0700 (PDT) From: Guillaume Ranquet To: airlied@linux.ie, angelogioacchino.delregno@collabora.com, chunfeng.yun@mediatek.com, chunkuang.hu@kernel.org, ck.hu@mediatek.com, daniel@ffwll.ch, deller@gmx.de, jitao.shi@mediatek.com, kishon@ti.com, krzk+dt@kernel.org, maarten.lankhorst@linux.intel.com, matthias.bgg@gmail.com, mripard@kernel.org, p.zabel@pengutronix.de, robh+dt@kernel.org, tzimmermann@suse.de, vkoul@kernel.org Subject: [PATCH v9 21/22] drm/mediatek: change the aux retries times when receiving AUX_DEFER Date: Mon, 28 Mar 2022 00:39:26 +0200 Message-Id: <20220327223927.20848-22-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220327223927.20848-1-granquet@baylibre.com> References: <20220327223927.20848-1-granquet@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, markyacoub@google.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Jitao Shi DP 1.4a Section 2.8.7.1.5.6.1: A DP Source device shall retry at least seven times upon receiving AUX_DEFER before giving up the AUX transaction. Aux should retry to send msg whether how many bytes. Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet --- drivers/gpu/drm/mediatek/mtk_dp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index e099491cc6a4..7a197c4a7143 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2016,7 +2016,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, bool is_read; u8 request; size_t accessed_bytes = 0; - int retry = 3, ret = 0; + int retry, ret = 0; mtk_dp = container_of(mtk_aux, struct mtk_dp, aux); @@ -2050,14 +2050,21 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, } if (msg->size == 0) { - ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, - msg->address + accessed_bytes, - msg->buffer + accessed_bytes, 0); + retry = 32; + while (retry--) { + ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, + msg->address + accessed_bytes, + msg->buffer + accessed_bytes, 0); + if (ret == 0) + break; + usleep_range(500, 600); + } } else { while (accessed_bytes < msg->size) { size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES, msg->size - accessed_bytes); + retry = 32; while (retry--) { ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, @@ -2066,7 +2073,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, to_access); if (ret == 0) break; - usleep_range(50, 100); + usleep_range(500, 600); } if (!retry || ret) { drm_info(mtk_dp->drm_dev, -- 2.34.1 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 B0D84C433EF for ; Sun, 27 Mar 2022 22:49:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wCA98gjWXDu0wJ6ZsGHblHCNAiNa/HBmXH9rPo/n3Lk=; b=pti4nAD5VR1W9s rFz9dLBSQ1vKpIMKxF1mF4gTyrGPe+YLp4tXDCkRwa7qPPQ8Cozx4RgTZNKRzIHAd6SBTF81MXGgO 40JqXGt47lm5Sb+Ig/m/RLJYFvwgGX/ZoWidPADFdV97Jm9zcUdnOKEp/VIg1iE7Kj1Qbwtjk9/QW uI8Su4BJK0XNs9h38UNGn8WzM/S1SWY3iNJotldUHk3ntqmtvqDBxAyRPl7dlqtgOqrLSRGZUpto/ 45blStsQZzJ/4W7h3/d3dTLoD15LK+x1RhSM8FbVV7NwOLCB9VxXluAz1Cc8EJVKKYxKvqp9o5PZC wopmosNsQmAzjFpipBeg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbhf-006Zqw-UO; Sun, 27 Mar 2022 22:49:43 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbZs-006VPQ-MS for linux-phy@bombadil.infradead.org; Sun, 27 Mar 2022 22:41:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=J/YzUK/xhJcYRU5vUQykhQs/px HlDCevfSeT6uTism7Ds12yQL8ubpb2HnTFlL9UqvSAsOOfjQ9TIhDMK43aJ7nFPTFAg4aTtPZ65ZM IIDatMl0ct4CoG2k/4PrfRKTyr/39XvwHhCOjHOrrz1+X3D/Mg46hO8ITlSTFp5qTKiAED3uSolCh WFCXLOmjHGqaSbgqlrk85KBGbqS5Ir3zuAunEGjp9dCV9vD7haX/B3+JrxfzXyaCA1RqJ6Z6zas/9 Q79B1hB3jvk9ABm4eyV63asWr+3Y6wHVzkQ5IHFvLED1Op3pbIpyBCBctwEqTXWFY27kytVh9kNrG 5PaW08wg==; Received: from mail-wr1-x433.google.com ([2a00:1450:4864:20::433]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbZp-005E4E-Bf for linux-phy@lists.infradead.org; Sun, 27 Mar 2022 22:41:39 +0000 Received: by mail-wr1-x433.google.com with SMTP id b19so17869121wrh.11 for ; Sun, 27 Mar 2022 15:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=AYDLTANXWRzGnB+sIMp01grvGk/SH+cQkVVSn0Jme+Sp0Hdpav8Wlpi1giPYDpywOB f6+XMddOzg//0bbLhJQCLnkfAV0Ch64BSBs9oAbxmdSQ0aFw6LF+1eH4sCXHn+oCWJK9 HAUXrfbNKPFhPTj2hSbp90b+fYh/KO1rXKZin8vWp75AbJyk6dGaR6kJh+zhJpkys+jQ Pk2FkzjQ/WrzkwnRLJGntCY5EY+d50uMvlP3KirJCkkCRn482UEZBSRYDpkR0UJ46DUu laMi+vD1+SNfyKxtrkIT5iuFhSooYpFxBbnxJgCDry2m5x5p4qdMYjJqUvDmSn3XsbJm bITQ== 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=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=aakHF9sHk/V2OAswJvsYleVpqAv6OiAhCQjrbqjLiDMsCuky2N+3sWKgIJZ7bQVYfS 4vwQRSEYts5P6dQ++RYIj+lu1anV3oy9V3orqHPagT0X9zvXy7zeswDfcla+wy1eoAga ykYj6zo4UA3ioiatjZ+afYs3x9/Yq77KFgxJRw2jPqUN7EeGj4G9JncEJbKj+dMDe2o5 3dUxa39zaQGNnYNycHGhPKp/gRp2cmY1dxpCQQR6pCNwX6bMvwdyI6kE7i7I6WZwRtcW nB1E8EC0cfTGlj5z7Ku2EMKhW+2KWM11gH4kNcSoQaubQ3tiGVFQuRug2EllweKE2DhY Eqbg== X-Gm-Message-State: AOAM531IyjW4+jb2NTkPBUkqLcEAK8JItS+M38jLf4eyEpd2La8ko0os J0YmkYIOJsw16LoYEKSe/F+RBQ== X-Google-Smtp-Source: ABdhPJysfkYMrMgHwodSSnzMkqerBi1jwSuIF2iefWJ4/FcOg7MYEeM+UjIlCWYlQv0Ck0GULeS7uA== X-Received: by 2002:a5d:6daf:0:b0:204:12b6:a15 with SMTP id u15-20020a5d6daf000000b0020412b60a15mr19676354wrs.340.1648420894641; Sun, 27 Mar 2022 15:41:34 -0700 (PDT) Received: from localhost.localdomain (2a02-8440-6341-357e-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6341:357e:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id v5-20020adfe4c5000000b001edc1e5053esm10400867wrm.82.2022.03.27.15.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Mar 2022 15:41:34 -0700 (PDT) From: Guillaume Ranquet To: airlied@linux.ie, angelogioacchino.delregno@collabora.com, chunfeng.yun@mediatek.com, chunkuang.hu@kernel.org, ck.hu@mediatek.com, daniel@ffwll.ch, deller@gmx.de, jitao.shi@mediatek.com, kishon@ti.com, krzk+dt@kernel.org, maarten.lankhorst@linux.intel.com, matthias.bgg@gmail.com, mripard@kernel.org, p.zabel@pengutronix.de, robh+dt@kernel.org, tzimmermann@suse.de, vkoul@kernel.org Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, markyacoub@google.com Subject: [PATCH v9 21/22] drm/mediatek: change the aux retries times when receiving AUX_DEFER Date: Mon, 28 Mar 2022 00:39:26 +0200 Message-Id: <20220327223927.20848-22-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220327223927.20848-1-granquet@baylibre.com> References: <20220327223927.20848-1-granquet@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220327_234137_522458_51B7F542 X-CRM114-Status: GOOD ( 12.64 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org From: Jitao Shi DP 1.4a Section 2.8.7.1.5.6.1: A DP Source device shall retry at least seven times upon receiving AUX_DEFER before giving up the AUX transaction. Aux should retry to send msg whether how many bytes. Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet --- drivers/gpu/drm/mediatek/mtk_dp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index e099491cc6a4..7a197c4a7143 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2016,7 +2016,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, bool is_read; u8 request; size_t accessed_bytes = 0; - int retry = 3, ret = 0; + int retry, ret = 0; mtk_dp = container_of(mtk_aux, struct mtk_dp, aux); @@ -2050,14 +2050,21 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, } if (msg->size == 0) { - ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, - msg->address + accessed_bytes, - msg->buffer + accessed_bytes, 0); + retry = 32; + while (retry--) { + ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, + msg->address + accessed_bytes, + msg->buffer + accessed_bytes, 0); + if (ret == 0) + break; + usleep_range(500, 600); + } } else { while (accessed_bytes < msg->size) { size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES, msg->size - accessed_bytes); + retry = 32; while (retry--) { ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, @@ -2066,7 +2073,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, to_access); if (ret == 0) break; - usleep_range(50, 100); + usleep_range(500, 600); } if (!retry || ret) { drm_info(mtk_dp->drm_dev, -- 2.34.1 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 39DAFC433EF for ; Sun, 27 Mar 2022 22:53:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=UeKYrxA26yG6kqEoeoezN3m+ddkiw67vj/tWIUjFFYM=; b=ViG+N7YDkvfDqN Z9o6j80fMxzIFGV3tEjuXcZpteCk+sA1DpOIIluu9DODZOTWTxTIIweKRKNwsIFAL/WXjnfyxYloR Ox63J/2sTbIrlHBaS4FtuKPRGPeqBYPN38nBZisym9yL7z9t0meUbtoHNDfTY3EHAKpmVyQe5lR0h K42fncXu8WDLOzFqsbAyuLFijboGGJMmLcYVvEdMMngR4pIZcvj2I8LVxryu4RLgcVNborfcTVZXp Og2mcgyjOMIoKYbt3PV5an5vrL1IOVFPQvutrDSBPrAPv4jXJczaOPWNNWpY1rbvE30Ljs/DPzct+ JVkWbke4Jos8j/Ih1uPQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbkk-006bIl-E5; Sun, 27 Mar 2022 22:52:54 +0000 Received: from mail-wr1-x42e.google.com ([2a00:1450:4864:20::42e]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbZn-006VMA-TX for linux-mediatek@lists.infradead.org; Sun, 27 Mar 2022 22:41:48 +0000 Received: by mail-wr1-x42e.google.com with SMTP id r7so16789310wrc.0 for ; Sun, 27 Mar 2022 15:41:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=AYDLTANXWRzGnB+sIMp01grvGk/SH+cQkVVSn0Jme+Sp0Hdpav8Wlpi1giPYDpywOB f6+XMddOzg//0bbLhJQCLnkfAV0Ch64BSBs9oAbxmdSQ0aFw6LF+1eH4sCXHn+oCWJK9 HAUXrfbNKPFhPTj2hSbp90b+fYh/KO1rXKZin8vWp75AbJyk6dGaR6kJh+zhJpkys+jQ Pk2FkzjQ/WrzkwnRLJGntCY5EY+d50uMvlP3KirJCkkCRn482UEZBSRYDpkR0UJ46DUu laMi+vD1+SNfyKxtrkIT5iuFhSooYpFxBbnxJgCDry2m5x5p4qdMYjJqUvDmSn3XsbJm bITQ== 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=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=2T44Oe0m16lC+QRaZrOPcFlEXjLD9VmXCvcnI0nJmkgk0wcCSQ0gITF7Zs8bNLzowm eDRrCSd2xH2npcx+DnqPEwLkuH+0w+k5JPiyXpGiX6+7IiXCO+EmdQpM8Rsc61pMe2f7 PtNM9N6YBIi60NW0zAdSo9sKqJA83jWrswCl1pEx445GMXZpdq0PLs8rsxkK6+/4LGnY koWDsWJwHZJ0tVxH4i6zdYZcEjkeKHf9uh3MDXSOOszo913TsZoVrL0pKhNZ/cW0G0vS OCrjEesi+o1DJYwiVhd1UoJrQoV66bSelMKABQ0QJaaOQthOjFkAegbMHsS3rUcLt80i oAJw== X-Gm-Message-State: AOAM532MDwc5TM1jnw9/ftFXF0/yzpIU909MqEHyhoYr4rJu3OGNCwom raxNdArHWifVHlqMlvLd/ASetQ== X-Google-Smtp-Source: ABdhPJysfkYMrMgHwodSSnzMkqerBi1jwSuIF2iefWJ4/FcOg7MYEeM+UjIlCWYlQv0Ck0GULeS7uA== X-Received: by 2002:a5d:6daf:0:b0:204:12b6:a15 with SMTP id u15-20020a5d6daf000000b0020412b60a15mr19676354wrs.340.1648420894641; Sun, 27 Mar 2022 15:41:34 -0700 (PDT) Received: from localhost.localdomain (2a02-8440-6341-357e-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6341:357e:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id v5-20020adfe4c5000000b001edc1e5053esm10400867wrm.82.2022.03.27.15.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Mar 2022 15:41:34 -0700 (PDT) From: Guillaume Ranquet To: airlied@linux.ie, angelogioacchino.delregno@collabora.com, chunfeng.yun@mediatek.com, chunkuang.hu@kernel.org, ck.hu@mediatek.com, daniel@ffwll.ch, deller@gmx.de, jitao.shi@mediatek.com, kishon@ti.com, krzk+dt@kernel.org, maarten.lankhorst@linux.intel.com, matthias.bgg@gmail.com, mripard@kernel.org, p.zabel@pengutronix.de, robh+dt@kernel.org, tzimmermann@suse.de, vkoul@kernel.org Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, markyacoub@google.com Subject: [PATCH v9 21/22] drm/mediatek: change the aux retries times when receiving AUX_DEFER Date: Mon, 28 Mar 2022 00:39:26 +0200 Message-Id: <20220327223927.20848-22-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220327223927.20848-1-granquet@baylibre.com> References: <20220327223927.20848-1-granquet@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220327_154136_010445_EF4771E5 X-CRM114-Status: GOOD ( 12.90 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Jitao Shi DP 1.4a Section 2.8.7.1.5.6.1: A DP Source device shall retry at least seven times upon receiving AUX_DEFER before giving up the AUX transaction. Aux should retry to send msg whether how many bytes. Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet --- drivers/gpu/drm/mediatek/mtk_dp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index e099491cc6a4..7a197c4a7143 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2016,7 +2016,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, bool is_read; u8 request; size_t accessed_bytes = 0; - int retry = 3, ret = 0; + int retry, ret = 0; mtk_dp = container_of(mtk_aux, struct mtk_dp, aux); @@ -2050,14 +2050,21 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, } if (msg->size == 0) { - ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, - msg->address + accessed_bytes, - msg->buffer + accessed_bytes, 0); + retry = 32; + while (retry--) { + ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, + msg->address + accessed_bytes, + msg->buffer + accessed_bytes, 0); + if (ret == 0) + break; + usleep_range(500, 600); + } } else { while (accessed_bytes < msg->size) { size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES, msg->size - accessed_bytes); + retry = 32; while (retry--) { ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, @@ -2066,7 +2073,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, to_access); if (ret == 0) break; - usleep_range(50, 100); + usleep_range(500, 600); } if (!retry || ret) { drm_info(mtk_dp->drm_dev, -- 2.34.1 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 E5055C433F5 for ; Sun, 27 Mar 2022 22:55:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oDldcnE4CiFk9ZWL08C9/8VEYYn2pwccKoyQa14JDIU=; b=Ufq+DtZK11ysXe ygnpP9sRn30Sro2mKyvLCgBmbiMZU7efpZYmwkApbLqkcr+BKrJXVR1svoRr2kPu92pZRNzw7fVoS vVfgWoxH84dCVXiKKeM5lo2Jc34jR9gIuK1LBlI4iLFDlpZBAbkqy43P0kbxenC3PyN2NApoDhMew wXrI8w4YDcAYgXFjgV18oKFztMk1pgRQYA6D7H8oN6a1xm4hag1oQr6b2ci9Ol2Zibp65xcKpRIo8 u31F9BwRKlaNNh+bPUdGRDleYPnUwCuW8KRjq7LwkJ5/jrV1Ai+/sflxp+oOxrtSNxBUNSHr/5KF4 XNbaa/Oco/0jCnnGtY1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbkz-006bO0-32; Sun, 27 Mar 2022 22:53:10 +0000 Received: from mail-wr1-f48.google.com ([209.85.221.48]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nYbZo-006VMG-HA for linux-arm-kernel@lists.infradead.org; Sun, 27 Mar 2022 22:41:48 +0000 Received: by mail-wr1-f48.google.com with SMTP id m30so17929532wrb.1 for ; Sun, 27 Mar 2022 15:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=AYDLTANXWRzGnB+sIMp01grvGk/SH+cQkVVSn0Jme+Sp0Hdpav8Wlpi1giPYDpywOB f6+XMddOzg//0bbLhJQCLnkfAV0Ch64BSBs9oAbxmdSQ0aFw6LF+1eH4sCXHn+oCWJK9 HAUXrfbNKPFhPTj2hSbp90b+fYh/KO1rXKZin8vWp75AbJyk6dGaR6kJh+zhJpkys+jQ Pk2FkzjQ/WrzkwnRLJGntCY5EY+d50uMvlP3KirJCkkCRn482UEZBSRYDpkR0UJ46DUu laMi+vD1+SNfyKxtrkIT5iuFhSooYpFxBbnxJgCDry2m5x5p4qdMYjJqUvDmSn3XsbJm bITQ== 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=TwcBGQ6dA75HdxpcUCrD8mvsn7/MZTlw7uERAWlwKmI=; b=ODPL86hzdICuoUr1A+cDOHXoryaFipzb8aew0w3/i632fG7ZfdqYnhRC7zSuls82Iz mCcTuZ8teXYMPLQJD72/P+Qi7MoKhkWI5TPvpqaimmuC9ySGVz6eW/TCWlYp48oHVqvn 4mRzWhbWaIp/gj64YdKtfrw0FP36fGtIINA2gyqNub5e020mvb/xSwUa9vb1IUhkXMPm 1Py887ElAl8RmirX6LB6U0bySSyylDNHw5JoXA0u84DQlcyN6t8OcFNGTbHwey/dbwp8 J4qMTIcqz/cCzS6TNwe2qnWVUl6SjMb5xrgREiRQItpwjDuKNIv8pUs9uzOz1NesPL5d eXQQ== X-Gm-Message-State: AOAM533eZCXws5IUS52n/hDoYZIhLsp51fkreU3MHcIDFLh69hoWF3ng hGgyEL5qQ7jTi+WMh2sZeafdHg== X-Google-Smtp-Source: ABdhPJysfkYMrMgHwodSSnzMkqerBi1jwSuIF2iefWJ4/FcOg7MYEeM+UjIlCWYlQv0Ck0GULeS7uA== X-Received: by 2002:a5d:6daf:0:b0:204:12b6:a15 with SMTP id u15-20020a5d6daf000000b0020412b60a15mr19676354wrs.340.1648420894641; Sun, 27 Mar 2022 15:41:34 -0700 (PDT) Received: from localhost.localdomain (2a02-8440-6341-357e-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6341:357e:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id v5-20020adfe4c5000000b001edc1e5053esm10400867wrm.82.2022.03.27.15.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Mar 2022 15:41:34 -0700 (PDT) From: Guillaume Ranquet To: airlied@linux.ie, angelogioacchino.delregno@collabora.com, chunfeng.yun@mediatek.com, chunkuang.hu@kernel.org, ck.hu@mediatek.com, daniel@ffwll.ch, deller@gmx.de, jitao.shi@mediatek.com, kishon@ti.com, krzk+dt@kernel.org, maarten.lankhorst@linux.intel.com, matthias.bgg@gmail.com, mripard@kernel.org, p.zabel@pengutronix.de, robh+dt@kernel.org, tzimmermann@suse.de, vkoul@kernel.org Cc: devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-phy@lists.infradead.org, markyacoub@google.com Subject: [PATCH v9 21/22] drm/mediatek: change the aux retries times when receiving AUX_DEFER Date: Mon, 28 Mar 2022 00:39:26 +0200 Message-Id: <20220327223927.20848-22-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220327223927.20848-1-granquet@baylibre.com> References: <20220327223927.20848-1-granquet@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220327_154136_617975_7931427D X-CRM114-Status: GOOD ( 14.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jitao Shi DP 1.4a Section 2.8.7.1.5.6.1: A DP Source device shall retry at least seven times upon receiving AUX_DEFER before giving up the AUX transaction. Aux should retry to send msg whether how many bytes. Signed-off-by: Jitao Shi Signed-off-by: Guillaume Ranquet --- drivers/gpu/drm/mediatek/mtk_dp.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index e099491cc6a4..7a197c4a7143 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2016,7 +2016,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, bool is_read; u8 request; size_t accessed_bytes = 0; - int retry = 3, ret = 0; + int retry, ret = 0; mtk_dp = container_of(mtk_aux, struct mtk_dp, aux); @@ -2050,14 +2050,21 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, } if (msg->size == 0) { - ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, - msg->address + accessed_bytes, - msg->buffer + accessed_bytes, 0); + retry = 32; + while (retry--) { + ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, + msg->address + accessed_bytes, + msg->buffer + accessed_bytes, 0); + if (ret == 0) + break; + usleep_range(500, 600); + } } else { while (accessed_bytes < msg->size) { size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES, msg->size - accessed_bytes); + retry = 32; while (retry--) { ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request, @@ -2066,7 +2073,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, to_access); if (ret == 0) break; - usleep_range(50, 100); + usleep_range(500, 600); } if (!retry || ret) { drm_info(mtk_dp->drm_dev, -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel