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 X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 3A172C433E7 for ; Thu, 3 Sep 2020 08:06:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09433215A4 for ; Thu, 3 Sep 2020 08:06:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cerno.tech header.i=@cerno.tech header.b="cDAp9pcm"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="GJR49dxW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728735AbgICIGl (ORCPT ); Thu, 3 Sep 2020 04:06:41 -0400 Received: from wnew4-smtp.messagingengine.com ([64.147.123.18]:53315 "EHLO wnew4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728503AbgICIDf (ORCPT ); Thu, 3 Sep 2020 04:03:35 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailnew.west.internal (Postfix) with ESMTP id 59740C18; Thu, 3 Sep 2020 04:03:34 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Thu, 03 Sep 2020 04:03:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cerno.tech; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm3; bh=7xfe+tngvDJEY yUZhayJC8QppzfdlwLaBZR0Cls2PKk=; b=cDAp9pcmmAjzSkzW6PCfYurgzp2S/ lloNta+FniysiGwo/Z7KYRo3PMIbZAczW+Bzhkqh0BiP0S5CeNc0ibJ+HfuoFxIz dhty100SiMFZCAe3DbhAlh9ZiRrKQcSZSrrVeux2j4JZvhyz2l3oMNSn4dYX+PTQ CUu99lez8j5eCWxE4OEblco3WB4uKfWNrwmKQuVvcKSQqLx+ndH/JDvniVRtJMGk AaSYLeyt4GHt25tOcFbRUIyJiZ+Yj3EJIBpnIPdzsNJve4ItxizfT87JJUqnni9Q 3s+s5+DnkuEgHs61YK1O6El3ksqkQG8flHaGT+1Bht6i1WGG0tMgQUgWA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=7xfe+tngvDJEYyUZhayJC8QppzfdlwLaBZR0Cls2PKk=; b=GJR49dxW 6IBXLqWnkyf72+VJOp5lV6LXGbBVzZl5c+JoY2Ulu29yVLhtjxpZSZjs0LCqiY7x nHBGXp5A/ZVcThs8PndsOah2ooUaOvs09E5OIdejzo/T8OedlfImTv5aV8fsBT6D iUGynUt6gtf0NAF6M+e52QkwBt7sGppx2ENw07oT9eBqyUau5w81Hu1cKeQqKvYg 8jjMIgFyVr0yE7V+Ys7YjnyV8ghBmTeG7Db+ZA2c7sZjvtPEK5D9XvsiZTycJU1p 9c/0ocqNyje0qRqSNQElMsza5OcW8nJeGPOF3GMVvl99XbDIB95dwRTowyT/uHIc IBLmWyckwHlWNA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduiedrudegtddguddviecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefhvffufffkofgjfhgggfestdekredtredttdenucfhrhhomhepofgrgihi mhgvucftihhprghrugcuoehmrgigihhmvgestggvrhhnohdrthgvtghhqeenucggtffrrg htthgvrhhnpedvkeelveefffekjefhffeuleetleefudeifeehuddugffghffhffehveev heehvdenucfkphepledtrdekledrieekrdejieenucevlhhushhtvghrufhiiigvpeeije enucfrrghrrghmpehmrghilhhfrhhomhepmhgrgihimhgvsegtvghrnhhordhtvggthh X-ME-Proxy: Received: from localhost (lfbn-tou-1-1502-76.w90-89.abo.wanadoo.fr [90.89.68.76]) by mail.messagingengine.com (Postfix) with ESMTPA id 964CC306005B; Thu, 3 Sep 2020 04:03:33 -0400 (EDT) From: Maxime Ripard To: Nicolas Saenz Julienne , Eric Anholt Cc: dri-devel@lists.freedesktop.org, linux-rpi-kernel@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave Stevenson , Tim Gover , Phil Elwell , Maxime Ripard , Chanwoo Choi , Hoegeun Kwon , Stefan Wahren Subject: [PATCH v5 71/80] drm/vc4: hdmi: Always recenter the HDMI FIFO Date: Thu, 3 Sep 2020 10:01:43 +0200 Message-Id: X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to avoid a pixel getting stuck in an unflushable FIFO, we need to recenter the FIFO every time we're doing a modeset and not only if we're connected to an HDMI monitor. Reviewed-by: Dave Stevenson Tested-by: Chanwoo Choi Tested-by: Hoegeun Kwon Tested-by: Stefan Wahren Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hdmi.c | 46 +++++++++++++++++++---------------- 1 file changed, 26 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 3c7862a1dda8..c9eae5352b9a 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -425,6 +425,30 @@ static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi, (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW)); } +static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi) +{ + u32 drift; + int ret; + + drift = HDMI_READ(HDMI_FIFO_CTL); + drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK; + + HDMI_WRITE(HDMI_FIFO_CTL, + drift & ~VC4_HDMI_FIFO_CTL_RECENTER); + HDMI_WRITE(HDMI_FIFO_CTL, + drift | VC4_HDMI_FIFO_CTL_RECENTER); + usleep_range(1000, 1100); + HDMI_WRITE(HDMI_FIFO_CTL, + drift & ~VC4_HDMI_FIFO_CTL_RECENTER); + HDMI_WRITE(HDMI_FIFO_CTL, + drift | VC4_HDMI_FIFO_CTL_RECENTER); + + ret = wait_for(HDMI_READ(HDMI_FIFO_CTL) & + VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1); + WARN_ONCE(ret, "Timeout waiting for " + "VC4_HDMI_FIFO_CTL_RECENTER_DONE"); +} + static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder) { struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; @@ -543,8 +567,6 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder) } if (vc4_encoder->hdmi_monitor) { - u32 drift; - WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) & VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE)); HDMI_WRITE(HDMI_SCHEDULER_CONTROL, @@ -555,25 +577,9 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder) VC4_HDMI_RAM_PACKET_ENABLE); vc4_hdmi_set_infoframes(encoder); - - drift = HDMI_READ(HDMI_FIFO_CTL); - drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK; - - HDMI_WRITE(HDMI_FIFO_CTL, - drift & ~VC4_HDMI_FIFO_CTL_RECENTER); - HDMI_WRITE(HDMI_FIFO_CTL, - drift | VC4_HDMI_FIFO_CTL_RECENTER); - usleep_range(1000, 1100); - HDMI_WRITE(HDMI_FIFO_CTL, - drift & ~VC4_HDMI_FIFO_CTL_RECENTER); - HDMI_WRITE(HDMI_FIFO_CTL, - drift | VC4_HDMI_FIFO_CTL_RECENTER); - - ret = wait_for(HDMI_READ(HDMI_FIFO_CTL) & - VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1); - WARN_ONCE(ret, "Timeout waiting for " - "VC4_HDMI_FIFO_CTL_RECENTER_DONE"); } + + vc4_hdmi_recenter_fifo(vc4_hdmi); } static enum drm_mode_status -- git-series 0.9.1