From patchwork Thu Jul 13 14:41:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 9838781 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9183C602A0 for ; Thu, 13 Jul 2017 14:42:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8282A2860A for ; Thu, 13 Jul 2017 14:42:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76CC92864B; Thu, 13 Jul 2017 14:42:41 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 38B812860A for ; Thu, 13 Jul 2017 14:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=sjlCuYU3x8tnBvw3jHiL4nYs3G8MDyToNCCUUitRtA0=; b=Ia6AUjfhJOxK1Rd6m/daip/Adr Imtv1jpJek4gzHyYD4VXESb2RTHGOm/HTsS6U6NIvB2FBR5NmwUW72zXXSX8QtBcK4Yghebq6rEcy meiWWhyTB8Rj8Jvrr4YdRejZ2FikADW2tbcQhQjA+9CihxOGWvjcEZuXAKC1Jg4jr31MaVVf7WVZ+ 8iA96aXB2SapcerhQ1E7UnNoRIPT65xYwFDLKEwPtstnKJWOiymEl6EyQEuTm+b74xyjzNQyfRRJb I7dmTjXnILal5sZaGKfh1Xk6wUuG45xXbt/PSurYF3vWtH3MEeEzp644J02bSHfL7bDNrccZeqb1Q t3sU0gOw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dVfKA-0005a4-EU; Thu, 13 Jul 2017 14:42:38 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dVfJE-0004eH-A2; Thu, 13 Jul 2017 14:41:44 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id C6AB821FC2; Thu, 13 Jul 2017 16:41:18 +0200 (CEST) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 9ED26207CD; Thu, 13 Jul 2017 16:41:18 +0200 (CEST) From: Maxime Ripard To: Daniel Vetter , David Airlie , Jani Nikula , Sean Paul , Inki Dae , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Kukjin Kim , Krzysztof Kozlowski , Laurent Pinchart , Mark Yao , Heiko Stuebner , Chen-Yu Tsai , Maxime Ripard Subject: [PATCH 3/4] drm/sun4i: engine: Add commit_poll function Date: Thu, 13 Jul 2017 16:41:15 +0200 Message-Id: X-Mailer: git-send-email 2.13.0 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170713_074140_735675_5E1077D5 X-CRM114-Status: GOOD ( 12.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP On the earlier Allwinner chips, with the first iteration of the display engine, the backend commit bit needs to be polled before making any register access to the backend. Add an operation for that, that will be called in atomic_begin in order to be sure to have that bit cleared before we do any modifications. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_crtc.c | 2 ++ drivers/gpu/drm/sun4i/sunxi_engine.h | 14 ++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c index f8c70439d1e2..2eba1d8639d8 100644 --- a/drivers/gpu/drm/sun4i/sun4i_crtc.c +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c @@ -45,6 +45,8 @@ static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc, spin_unlock_irqrestore(&dev->event_lock, flags); crtc->state->event = NULL; } + + WARN_ON(sunxi_engine_commit_poll(engine)); } static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc, diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h index 4cb70ae65c79..6618e182613c 100644 --- a/drivers/gpu/drm/sun4i/sunxi_engine.h +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h @@ -17,6 +17,7 @@ struct sunxi_engine; struct sunxi_engine_ops { void (*commit)(struct sunxi_engine *engine); + int (*commit_poll)(struct sunxi_engine *engine); struct drm_plane **(*layers_init)(struct drm_device *drm, struct sunxi_engine *engine); @@ -55,6 +56,19 @@ sunxi_engine_commit(struct sunxi_engine *engine) } /** + * sunxi_engine_commit_poll() - wait for all changes to be committed + * @engine: pointer to the engine + */ +static inline int +sunxi_engine_commit_poll(struct sunxi_engine *engine) +{ + if (engine->ops && engine->ops->commit_poll) + return engine->ops->commit_poll(engine); + + return 0; +} + +/** * sunxi_engine_layers_init() - Create planes (layers) for the engine * @drm: pointer to the drm_device for which planes will be created * @engine: pointer to the engine