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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 60239C43331 for ; Thu, 7 Nov 2019 15:31:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2D713214D8 for ; Thu, 7 Nov 2019 15:31:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729985AbfKGPbA (ORCPT ); Thu, 7 Nov 2019 10:31:00 -0500 Received: from relay12.mail.gandi.net ([217.70.178.232]:43661 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729656AbfKGPa7 (ORCPT ); Thu, 7 Nov 2019 10:30:59 -0500 Received: from localhost.localdomain (lfbn-tou-1-421-123.w86-206.abo.wanadoo.fr [86.206.246.123]) (Authenticated sender: paul.kocialkowski@bootlin.com) by relay12.mail.gandi.net (Postfix) with ESMTPSA id DF367200011; Thu, 7 Nov 2019 15:30:55 +0000 (UTC) From: Paul Kocialkowski To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Patrik Jakobsson , David Airlie , Daniel Vetter , Thomas Petazzoni , James Hilliard , Paul Kocialkowski Subject: [PATCH] drm/gma500: Fixup fbdev stolen size usage evaluation Date: Thu, 7 Nov 2019 16:30:48 +0100 Message-Id: <20191107153048.843881-1-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org psbfb_probe performs an evaluation of the required size from the stolen GTT memory, but gets it wrong in two distinct ways: - The resulting size must be page-size-aligned; - The size to allocate is derived from the surface dimensions, not the fb dimensions. When two connectors are connected with different modes, the smallest will be stored in the fb dimensions, but the size that needs to be allocated must match the largest (surface) dimensions. This is what is used in the actual allocation code. Fix this by correcting the evaluation to conform to the two points above. It allows correctly switching to 16bpp when one connector is e.g. 1920x1080 and the other is 1024x768. Signed-off-by: Paul Kocialkowski --- drivers/gpu/drm/gma500/framebuffer.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c index 218f3bb15276..90237abee088 100644 --- a/drivers/gpu/drm/gma500/framebuffer.c +++ b/drivers/gpu/drm/gma500/framebuffer.c @@ -462,6 +462,7 @@ static int psbfb_probe(struct drm_fb_helper *helper, container_of(helper, struct psb_fbdev, psb_fb_helper); struct drm_device *dev = psb_fbdev->psb_fb_helper.dev; struct drm_psb_private *dev_priv = dev->dev_private; + unsigned int fb_size; int bytespp; bytespp = sizes->surface_bpp / 8; @@ -471,8 +472,11 @@ static int psbfb_probe(struct drm_fb_helper *helper, /* If the mode will not fit in 32bit then switch to 16bit to get a console on full resolution. The X mode setting server will allocate its own 32bit GEM framebuffer */ - if (ALIGN(sizes->fb_width * bytespp, 64) * sizes->fb_height > - dev_priv->vram_stolen_size) { + fb_size = ALIGN(sizes->surface_width * bytespp, 64) * + sizes->surface_height; + fb_size = ALIGN(fb_size, PAGE_SIZE); + + if (fb_size > dev_priv->vram_stolen_size) { sizes->surface_bpp = 16; sizes->surface_depth = 16; } -- 2.23.0