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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D888EC43617 for ; Fri, 16 Apr 2021 09:00:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB8EC611AF for ; Fri, 16 Apr 2021 09:00:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240808AbhDPJBX (ORCPT ); Fri, 16 Apr 2021 05:01:23 -0400 Received: from mx2.suse.de ([195.135.220.15]:33998 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240742AbhDPJBV (ORCPT ); Fri, 16 Apr 2021 05:01:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id D82B5AF42; Fri, 16 Apr 2021 09:00:55 +0000 (UTC) From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, mripard@kernel.org, kraxel@redhat.com, corbet@lwn.net, lgirdwood@gmail.com, broonie@kernel.org, sam@ravnborg.org, robh@kernel.org, emil.l.velikov@gmail.com, geert+renesas@glider.be, hdegoede@redhat.com, bluescreen_avenger@verizon.net, gregkh@linuxfoundation.org Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, virtualization@lists.linux-foundation.org, Thomas Zimmermann Subject: [PATCH v4 9/9] drm/simpledrm: Acquire memory aperture for framebuffer Date: Fri, 16 Apr 2021 11:00:48 +0200 Message-Id: <20210416090048.11492-10-tzimmermann@suse.de> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210416090048.11492-1-tzimmermann@suse.de> References: <20210416090048.11492-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org We register the simplekms device with the DRM platform helpers. A native driver for the graphics hardware will kick-out the simpledrm driver before taking over the device. The original generic platform device from the simple-framebuffer boot code will be unregistered. The native driver will use whatever native hardware device it received. v4: * convert to drm_aperture_acquire_from_firmware() v3: * use platform_device_unregister() and handle detachment like hot-unplug event (Daniel) v2: * adapt to aperture changes * use drm_dev_unplug() and drm_dev_enter/exit() * don't split error string Signed-off-by: Thomas Zimmermann Tested-by: nerdopolis --- drivers/gpu/drm/tiny/simpledrm.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 9d522473cd7c..2bdb477d9326 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -6,6 +6,7 @@ #include #include +#include #include #include #include @@ -517,14 +518,23 @@ static int simpledrm_device_init_fb(struct simpledrm_device *sdev) static int simpledrm_device_init_mm(struct simpledrm_device *sdev) { + struct drm_device *dev = &sdev->dev; struct platform_device *pdev = sdev->pdev; struct resource *mem; void __iomem *screen_base; + int ret; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) return -EINVAL; + ret = devm_aperture_acquire_from_firmware(dev, mem->start, resource_size(mem)); + if (ret) { + drm_err(dev, "could not acquire memory range [0x%llx:0x%llx]: error %d\n", + mem->start, mem->end, ret); + return ret; + } + screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem)); if (!screen_base) @@ -625,12 +635,18 @@ simpledrm_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); struct drm_framebuffer *fb = plane_state->fb; void *vmap = shadow_plane_state->map[0].vaddr; /* TODO: Use mapping abstraction properly */ + struct drm_device *dev = &sdev->dev; + int idx; if (!fb) return; + if (!drm_dev_enter(dev, &idx)) + return; + drm_fb_blit_dstclip(sdev->screen_base, sdev->pitch, sdev->format->format, vmap, fb); + drm_dev_exit(idx); } static void @@ -658,7 +674,9 @@ simpledrm_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); void *vmap = shadow_plane_state->map[0].vaddr; /* TODO: Use mapping abstraction properly */ struct drm_framebuffer *fb = plane_state->fb; + struct drm_device *dev = &sdev->dev; struct drm_rect clip; + int idx; if (!fb) return; @@ -666,8 +684,13 @@ simpledrm_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &clip)) return; + if (!drm_dev_enter(dev, &idx)) + return; + drm_fb_blit_rect_dstclip(sdev->screen_base, sdev->pitch, sdev->format->format, vmap, fb, &clip); + + drm_dev_exit(idx); } static const struct drm_simple_display_pipe_funcs @@ -847,7 +870,7 @@ static int simpledrm_remove(struct platform_device *pdev) struct simpledrm_device *sdev = platform_get_drvdata(pdev); struct drm_device *dev = &sdev->dev; - drm_dev_unregister(dev); + drm_dev_unplug(dev); return 0; } -- 2.31.1