Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030273AbdDZVN0 (ORCPT ); Wed, 26 Apr 2017 17:13:26 -0400 Received: from mail-qk0-f170.google.com ([209.85.220.170]:36395 "EHLO mail-qk0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030228AbdDZVMm (ORCPT ); Wed, 26 Apr 2017 17:12:42 -0400 From: Laura Abbott To: Daniel Vetter , Chris Wilson , Sean Paul Cc: Laura Abbott , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Sumit Semwal Subject: [RFC PATCHv2 1/3] drm/vgem: Add a dummy platform device Date: Wed, 26 Apr 2017 14:12:28 -0700 Message-Id: <1493241150-21742-2-git-send-email-labbott@redhat.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1493241150-21742-1-git-send-email-labbott@redhat.com> References: <1493241150-21742-1-git-send-email-labbott@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1618 Lines: 58 The vgem driver is currently registered independent of any actual device. Some usage of the dmabuf APIs require an actual device structure to do anything. Register a dummy platform device for use with dmabuf. Signed-off-by: Laura Abbott --- v2: Store the platform device in the platformdev field instead of the regular device structure. --- drivers/gpu/drm/vgem/vgem_drv.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index a1f42d1..1b02e56 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -335,11 +335,20 @@ static int __init vgem_init(void) int ret; vgem_device = drm_dev_alloc(&vgem_driver, NULL); - if (IS_ERR(vgem_device)) { - ret = PTR_ERR(vgem_device); + if (IS_ERR(vgem_device)) + return PTR_ERR(vgem_device); + + vgem_device->platformdev = platform_device_register_simple("vgem", + -1, NULL, 0); + + if (!vgem_device->platformdev) { + ret = -ENODEV; goto out; } + dma_coerce_mask_and_coherent(&vgem_device->platformdev->dev, + DMA_BIT_MASK(64)); + ret = drm_dev_register(vgem_device, 0); if (ret) goto out_unref; @@ -347,13 +356,15 @@ static int __init vgem_init(void) return 0; out_unref: - drm_dev_unref(vgem_device); + platform_device_unregister(vgem_device->platformdev); out: + drm_dev_unref(vgem_device); return ret; } static void __exit vgem_exit(void) { + platform_device_unregister(vgem_device->platformdev); drm_dev_unregister(vgem_device); drm_dev_unref(vgem_device); } -- 2.7.4