From patchwork Mon Jul 11 15:50:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 589890 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29085CCA480 for ; Mon, 11 Jul 2022 15:51:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231744AbiGKPvH (ORCPT ); Mon, 11 Jul 2022 11:51:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231529AbiGKPu7 (ORCPT ); Mon, 11 Jul 2022 11:50:59 -0400 Received: from andre.telenet-ops.be (andre.telenet-ops.be [IPv6:2a02:1800:120:4::f00:15]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6AE077A51 for ; Mon, 11 Jul 2022 08:50:40 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by andre.telenet-ops.be with bizsmtp id trqe2700J4C55Sk01rqe5Y; Mon, 11 Jul 2022 17:50:38 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1oAvgD-0036xI-Rt; Mon, 11 Jul 2022 17:50:37 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1oAvgD-006siC-6A; Mon, 11 Jul 2022 17:50:37 +0200 From: Geert Uytterhoeven To: Helge Deller Cc: Michael Schmitz , Jonathan Corbet , linux-fbdev@vger.kernel.org, linux-doc@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 10/10] [RFC] video: fbdev: atari: Remove backward bug-compatibility Date: Mon, 11 Jul 2022 17:50:34 +0200 Message-Id: <52d52566a80bfd00acdcfc28a24799d3fbf638f6.1657554353.git.geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org As of v2.1.0, falcon_decode_var() contains a quirk to fix a rounding error, as explained by Günther Kelleter on Fri, 30 Aug 1996: This diff removes the now obsolete Falcon video option "pwrsave", and fixes a rounding error that is triggered by the resolution switching X server (those who use the pixel clock value 39722 in their /etc/fb.modes should change it to 39721). However, this causes the modified video mode returned by falcon_decode_var() to not match the video mode returned by falcon_encode_var(). Fix this by dropping the quirk. Unfortunately /etc/fb.modes in fbset was never updated, so the "640x480-60" mode still contains the wrong pixclock. Hence this change may introduce a regression. Signed-off-by: Geert Uytterhoeven --- Any comments? --- drivers/video/fbdev/atafb.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c index e8b178e732e2c785..2bc4089865e60ac2 100644 --- a/drivers/video/fbdev/atafb.c +++ b/drivers/video/fbdev/atafb.c @@ -1008,10 +1008,6 @@ static int falcon_decode_var(struct fb_var_screeninfo *var, else if (yres_virtual < yres) yres_virtual = yres; - /* backward bug-compatibility */ - if (var->pixclock > 1) - var->pixclock -= 1; - par->hw.falcon.line_width = bpp * xres / 16; par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;