From patchwork Mon Apr 16 22:52:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Anholt X-Patchwork-Id: 898985 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=anholt.net Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40Q3Z84sNLz9s0p for ; Tue, 17 Apr 2018 08:53:04 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752060AbeDPWxD (ORCPT ); Mon, 16 Apr 2018 18:53:03 -0400 Received: from anholt.net ([50.246.234.109]:57608 "EHLO anholt.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751150AbeDPWxC (ORCPT ); Mon, 16 Apr 2018 18:53:02 -0400 Received: from localhost (localhost [127.0.0.1]) by anholt.net (Postfix) with ESMTP id 92C6C10A1481; Mon, 16 Apr 2018 15:53:01 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at anholt.net Received: from anholt.net ([127.0.0.1]) by localhost (kingsolver.anholt.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 0fSN7eQU6FlR; Mon, 16 Apr 2018 15:52:59 -0700 (PDT) Received: from eliezer.anholt.net (localhost [127.0.0.1]) by anholt.net (Postfix) with ESMTP id AEF2B10A0214; Mon, 16 Apr 2018 15:52:59 -0700 (PDT) Received: by eliezer.anholt.net (Postfix, from userid 1000) id 364412FE2D80; Mon, 16 Apr 2018 15:52:59 -0700 (PDT) From: Eric Anholt To: dri-devel@lists.freedesktop.org, Rob Herring , Mark Rutland , Ray Jui , Scott Branden , Jon Mason , bcm-kernel-feedback-list@broadcom.com, Florian Fainelli , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Stefan Wahren , linux-rpi-kernel@lists.infradead.org Cc: Eric Anholt Subject: [PATCH v3 1/3] drm/vc4: Remove the need for the GPU-subsystem DT node. Date: Mon, 16 Apr 2018 15:52:59 -0700 Message-Id: <20180416225259.6571-1-eric@anholt.net> X-Mailer: git-send-email 2.17.0 In-Reply-To: References: Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The GPU subsystem node was a workaround to have a central device to bind V3D and display to. Following the lead of 246774d17fc0 ("drm/etnaviv: remove the need for a gpu-subsystem DT node"), remove the subsystem node usage and just create a platform device for the DRM device to attach to if any of the subsystem devices are present. v2: Simplify the DT walking code. v3: Always put the node. Signed-off-by: Eric Anholt Reviewed-by: Rob Herring --- .../bindings/display/brcm,bcm-vc4.txt | 7 ----- drivers/gpu/drm/vc4/vc4_drv.c | 28 +++++++++++++------ drivers/gpu/drm/vc4/vc4_hvs.c | 1 + drivers/gpu/drm/vc4/vc4_v3d.c | 1 + 4 files changed, 22 insertions(+), 15 deletions(-) diff --git a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt index 284e2b14cfbe..5fd4717101d6 100644 --- a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt +++ b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt @@ -4,9 +4,6 @@ The VC4 device present on the Raspberry Pi includes a display system with HDMI output and the HVS (Hardware Video Scaler) for compositing display planes. -Required properties for VC4: -- compatible: Should be "brcm,bcm2835-vc4" or "brcm,cygnus-vc4" - Required properties for Pixel Valve: - compatible: Should be one of "brcm,bcm2835-pixelvalve0", "brcm,bcm2835-pixelvalve1", or "brcm,bcm2835-pixelvalve2" @@ -153,10 +150,6 @@ v3d: v3d@7ec00000 { interrupts = <1 10>; }; -vc4: gpu { - compatible = "brcm,bcm2835-vc4"; -}; - panel: panel { compatible = "ontat,yx700wv03", "simple-panel"; diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 7c95ed5c5cac..e8ba9e7c71d2 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -364,22 +364,29 @@ static int vc4_platform_drm_remove(struct platform_device *pdev) return 0; } -static const struct of_device_id vc4_of_match[] = { - { .compatible = "brcm,bcm2835-vc4", }, - { .compatible = "brcm,cygnus-vc4", }, - {}, -}; -MODULE_DEVICE_TABLE(of, vc4_of_match); - static struct platform_driver vc4_platform_driver = { .probe = vc4_platform_drm_probe, .remove = vc4_platform_drm_remove, .driver = { .name = "vc4-drm", - .of_match_table = vc4_of_match, }, }; +static bool +driver_of_table_has_a_match(const struct platform_driver *driver) +{ + struct device_node *node; + bool ret; + + node = of_find_matching_node_and_match(NULL, + driver->driver.of_match_table, + NULL); + ret = of_device_is_available(node); + of_node_put(node); + + return ret; +} + static int __init vc4_drm_register(void) { int ret; @@ -389,6 +396,11 @@ static int __init vc4_drm_register(void) if (ret) return ret; + if (driver_of_table_has_a_match(&vc4_v3d_driver) || + driver_of_table_has_a_match(&vc4_hvs_driver)) { + platform_device_register_simple("vc4-drm", -1, NULL, 0); + } + return platform_driver_register(&vc4_platform_driver); } diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index 2b62fc5b8d85..730813ee74ae 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -262,6 +262,7 @@ static const struct of_device_id vc4_hvs_dt_match[] = { { .compatible = "brcm,bcm2835-hvs" }, {} }; +MODULE_DEVICE_TABLE(of, vc4_hvs_dt_match); struct platform_driver vc4_hvs_driver = { .probe = vc4_hvs_dev_probe, diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c index bfc2fa73d2ae..e77e9ebbab4b 100644 --- a/drivers/gpu/drm/vc4/vc4_v3d.c +++ b/drivers/gpu/drm/vc4/vc4_v3d.c @@ -459,6 +459,7 @@ static const struct of_device_id vc4_v3d_dt_match[] = { { .compatible = "brcm,vc4-v3d" }, {} }; +MODULE_DEVICE_TABLE(of, vc4_v3d_dt_match); struct platform_driver vc4_v3d_driver = { .probe = vc4_v3d_dev_probe,