From patchwork Fri May 24 18:16:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 10962833 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1674D14C0 for ; Mon, 27 May 2019 12:05:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 079AF2890C for ; Mon, 27 May 2019 12:05:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F087B28B37; Mon, 27 May 2019 12:05:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id ADD542890C for ; Mon, 27 May 2019 12:05:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C36AD89D8E; Mon, 27 May 2019 12:04:51 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lj1-x243.google.com (mail-lj1-x243.google.com [IPv6:2a00:1450:4864:20::243]) by gabe.freedesktop.org (Postfix) with ESMTPS id EFD066E13D for ; Fri, 24 May 2019 18:17:38 +0000 (UTC) Received: by mail-lj1-x243.google.com with SMTP id 14so9476686ljj.5 for ; Fri, 24 May 2019 11:17:38 -0700 (PDT) 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=AitnibXnsEfzpUu6HXlCBGqxsM7f3oVwPktBIsU9dZw=; b=g6UMNY4DuP6bWO9QQx2C++mO0HlAdStPk6zqy1jL6CJoYsIya+ZSGP1pRhg6Tcu7PD YsYbTrPrcydD8EG+jrWM3LQRamHpn/8BiCWg7mHA6/g65va0v/ymyDIqDQ+1fk0YzXwS ZDjyUyIB3ZmduUK7VIhlnt3k+uZJ0/Pq9oxV6AwAx/+mjJKEye8Xh+PkT45dO4B4DvcV SnnzFLhV8PiNNq6VXlLqpzox4xRROG2IWIGFPDP7eURYFH0HTiPIexdMKpgq0Sx6c6EM skR7KuuV6M0GG6cpwDbJVfa9uw7o9FMqnJ/+1ndYDCNHtMGX6tEBc6KrcXFRKj2cAMzL JgkQ== X-Gm-Message-State: APjAAAV+VV7a+DtH1y/fUOv2c05j/hZAQ7fFDcj1MG+rV6dVnrEG3nT8 v0AcVUOVjj+A5KNnOUKI82Y= X-Google-Smtp-Source: APXvYqym2oCg9Sa/M7W+zNv55wqaTr6QqA+Mz+Ik3fwZJStiat9x7n/ys/Y1wLW0HAoJmWt9g29+CQ== X-Received: by 2002:a2e:9f44:: with SMTP id v4mr914088ljk.85.1558721857495; Fri, 24 May 2019 11:17:37 -0700 (PDT) Received: from localhost.localdomain ([94.29.35.141]) by smtp.gmail.com with ESMTPSA id h10sm810376ljm.9.2019.05.24.11.17.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 May 2019 11:17:36 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding Subject: [PATCH v2 1/3] drm/tegra: dc: Tune up high priority request controls on Tegra20 Date: Fri, 24 May 2019 21:16:25 +0300 Message-Id: <20190524181627.16490-2-digetx@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190524181627.16490-1-digetx@gmail.com> References: <20190524181627.16490-1-digetx@gmail.com> MIME-Version: 1.0 X-Mailman-Approved-At: Mon, 27 May 2019 12:03:54 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=AitnibXnsEfzpUu6HXlCBGqxsM7f3oVwPktBIsU9dZw=; b=Ilpl5HFlrboLQeGOD/OFT8IhSrFmaUBjQpWEez2YHvNJz2iXRZCFuerj7LEYI9bUL+ bQXOFHbVmlw4yGuY0yc5np5xCIQj0eUMHETbqiCRtSS3us8RL4mW3kxq399lKzo46gm+ 3g06jpAbtFxdslmYgK2925qYZjFWtSKhgQyEExS1Pn4NUBPjnABQZNolsab5dHqLQR0n wQmjoiks1YrETORKfr6YdTsurphVXK1otj5Nb0PeoGYaVDqcAZ0KD8sS3Tsicm4jttUJ dZ7WvCbiek8NVkJF9FGeQ2KnHMkwFuCcDFeHksuFYu4fX6Y0GIi2BLY+zGuTaeloobOS zo0g== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Tegra20 has a high priority request control that allow to configure when display's memory client should perform read requests with a higher priority (Tegra30+ uses other means). Set up the controls for a more aggressive prefetching to reliably avoid FIFO underflow on a lower memory frequency, this allow to safely drop the memory bandwidth requirement by about two times in a most popular cases (only one display active, video overlay inactive, no scaling is done). Signed-off-by: Dmitry Osipenko --- drivers/gpu/drm/tegra/dc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 079250c85733..3e13948dcdcd 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -1828,12 +1828,12 @@ static void tegra_crtc_atomic_enable(struct drm_crtc *crtc, tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); /* initialize timer */ - value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) | - WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20); + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x70) | + WINDOW_B_THRESHOLD(0x30) | WINDOW_C_THRESHOLD(0x70); tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY); - value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) | - WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1); + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0) | + WINDOW_B_THRESHOLD(0) | WINDOW_C_THRESHOLD(0); tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |