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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1884AC55167 for ; Fri, 31 Jul 2026 02:41:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2379210E111; Fri, 31 Jul 2026 02:41:07 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="CO5fgI7M"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 38D1C10E111 for ; Fri, 31 Jul 2026 02:41:05 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 0A28843ECB; Fri, 31 Jul 2026 02:41:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48DE31F00A3D; Fri, 31 Jul 2026 02:41:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785465664; bh=wpGbo/T2vqfHpg6x90ZTuSPiFWtovciDxmqa911luyY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CO5fgI7MK8ErDZadE1tEjj/9J4h4tFauFIJGyRUDkla6ZmZWjTFqj6LKqA/M488qr 1Q2XDKzzTs9UcLGh1BpANMo3uzo3fhjWPs8AlE/ibCcGY/ALilyAo0LRIB7MOxEQqb RVlODnk5PHpksjEP4h+QzLTa19ZRR6OVutiF59wiwgo+R1Q2j+XjbJ3SA4n7VG8d2h PQgM7Da4X8BKex3fBTlPBcfz76BrHBdmD6yP4MyPr4255CwgzjX2wmgxXYm3swNKZz TPTOR0bzMydiWf+8Zj7KoJoT3g5L54xEozIe3Is0RyKHqyvJF7EqAp2dx6kvRmOYum 7LKsv97HJHXcw== From: Sasha Levin To: stable@vger.kernel.org Cc: Thomas Zimmermann , dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, Thierry Reding , Sasha Levin Subject: [PATCH 6.18.y 2/2] drm/tegra: fbdev: Remove offset into framebuffer memory Date: Thu, 30 Jul 2026 22:41:01 -0400 Message-ID: <20260731024101.3339564-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260731024101.3339564-1-sashal@kernel.org> References: <2026072951-strategy-rage-af59@gregkh> <20260731024101.3339564-1-sashal@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Thomas Zimmermann [ Upstream commit a18b6e30ecd69096beda4a0c96d2570900c3879a ] The screen_buffer field in struct fb_info contains the kernel address of the first byte of framebuffer memory. Do not add the display offset. This offset only describes scrolling during scanout. Signed-off-by: Thomas Zimmermann Fixes: de2ba664c30f ("gpu: host1x: drm: Add memory manager and fb") Cc: dri-devel@lists.freedesktop.org Cc: linux-tegra@vger.kernel.org Cc: # v3.10+ Signed-off-by: Thierry Reding Link: https://patch.msgid.link/20260421073646.144712-3-tzimmermann@suse.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/tegra/fbdev.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/tegra/fbdev.c b/drivers/gpu/drm/tegra/fbdev.c index ba0971ec34b5..d4ef5d5e4264 100644 --- a/drivers/gpu/drm/tegra/fbdev.c +++ b/drivers/gpu/drm/tegra/fbdev.c @@ -78,7 +78,6 @@ int tegra_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper, struct fb_info *info = helper->info; unsigned int bytes_per_pixel; struct drm_framebuffer *fb; - unsigned long offset; struct tegra_bo *bo; size_t size; int err; @@ -118,9 +117,6 @@ int tegra_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper, drm_fb_helper_fill_info(info, helper, sizes); - offset = info->var.xoffset * bytes_per_pixel + - info->var.yoffset * fb->pitches[0]; - if (bo->pages) { bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); @@ -132,9 +128,9 @@ int tegra_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper, } info->flags |= FBINFO_VIRTFB; - info->screen_buffer = bo->vaddr + offset; + info->screen_buffer = bo->vaddr; info->screen_size = size; - info->fix.smem_start = (unsigned long)(bo->iova + offset); + info->fix.smem_start = (unsigned long)(bo->iova); info->fix.smem_len = size; return 0; -- 2.53.0