From patchwork Mon Feb 11 15:02:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 10806407 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 BE40F13B5 for ; Mon, 11 Feb 2019 17:16:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A35D72675C for ; Mon, 11 Feb 2019 17:16:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 967852A874; Mon, 11 Feb 2019 17:16:03 +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,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 40C9F2675C for ; Mon, 11 Feb 2019 17:16:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9FB9289A1A; Mon, 11 Feb 2019 17:15:08 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mslow2.mail.gandi.net (mslow2.mail.gandi.net [217.70.178.242]) by gabe.freedesktop.org (Postfix) with ESMTPS id EDD686E273 for ; Mon, 11 Feb 2019 16:16:40 +0000 (UTC) Received: from relay1-d.mail.gandi.net (unknown [217.70.183.193]) by mslow2.mail.gandi.net (Postfix) with ESMTP id E403B3A5A88 for ; Mon, 11 Feb 2019 16:04:47 +0100 (CET) X-Originating-IP: 185.94.189.187 Received: from localhost (unknown [185.94.189.187]) (Authenticated sender: maxime.ripard@bootlin.com) by relay1-d.mail.gandi.net (Postfix) with ESMTPSA id EFE21240031; Mon, 11 Feb 2019 15:03:23 +0000 (UTC) From: Maxime Ripard To: Mark Rutland , Rob Herring , Frank Rowand , Chen-Yu Tsai , Maxime Ripard Subject: [PATCH v3 5/7] drm/sun4i: Rely on dma interconnect for our RAM offset Date: Mon, 11 Feb 2019 16:02:53 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 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: devicetree@vger.kernel.org, Thomas Petazzoni , Arnd Bergmann , Daniel Vetter , dri-devel@lists.freedesktop.org, Georgi Djakov , Paul Kocialkowski , Yong Deng , Robin Murphy , Dave Martin , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Now that we can express our DMA topology, rely on those property instead of hardcoding an offset from the dma_addr_t which wasn't really great. We still need to add some code to deal with the old DT that would lack that property, but we move the offset to the DRM device dma_pfn_offset to be able to rely on just the dma_addr_t associated to the GEM object. Acked-by: Daniel Vetter Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_backend.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index 9e9255ee59cd..1846a1b30fea 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -383,13 +383,6 @@ int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend, paddr = drm_fb_cma_get_gem_addr(fb, state, 0); DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr); - /* - * backend DMA accesses DRAM directly, bypassing the system - * bus. As such, the address range is different and the buffer - * address needs to be corrected. - */ - paddr -= PHYS_OFFSET; - if (fb->format->is_yuv) return sun4i_backend_update_yuv_buffer(backend, fb, paddr); @@ -835,6 +828,27 @@ static int sun4i_backend_bind(struct device *dev, struct device *master, dev_set_drvdata(dev, backend); spin_lock_init(&backend->frontend_lock); + if (of_find_property(dev->of_node, "interconnects", NULL)) { + /* + * This assume we have the same DMA constraints for all our the + * devices in our pipeline (all the backends, but also the + * frontends). This sounds bad, but it has always been the case + * for us, and DRM doesn't do per-device allocation either, so + * we would need to fix DRM first... + */ + ret = of_dma_configure(drm->dev, dev->of_node, true); + if (ret) + return ret; + } else { + /* + * If we don't have the interconnect property, most likely + * because of an old DT, we need to set the DMA offset by hand + * on our device since the RAM mapping is at 0 for the DMA bus, + * unlike the CPU. + */ + drm->dev->dma_pfn_offset = PHYS_PFN_OFFSET; + } + backend->engine.node = dev->of_node; backend->engine.ops = &sun4i_backend_engine_ops; backend->engine.id = sun4i_backend_of_get_id(dev->of_node);