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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED158C433F5 for ; Tue, 11 Jan 2022 08:36:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236085AbiAKIgw (ORCPT ); Tue, 11 Jan 2022 03:36:52 -0500 Received: from mga06.intel.com ([134.134.136.31]:31519 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231352AbiAKIgv (ORCPT ); Tue, 11 Jan 2022 03:36:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1641890211; x=1673426211; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=fb8nWMAZrmWV41xVjkHvGnRCVsb+6xDWT6E89YI2w8A=; b=ml2GcNP7vd1cg1Oo0NCQ8/wNVY30Cs3vqRXUFknlUBoXeJHVvnNxs11e WFNKDCB6u/tPsySzj0slMxaHzUKTFkSinJgCfQmOY/uVfLKglkD+ra7m1 zFFzc3omNQbUYLgMLoWbI687hLIoP1UmS2H1/OBP25730BzMk/Kk1viZE ri5oTI062bLI9nsgcDNRekN53RJHYspqfI3QARobe3K/PqSxOSA+hXpY+ eFWCliO7CLpcn5BmzTmTOe3CyLYDNbZrGu7QzmrNwEjHaqD68hdF2przL ZMc53vcXqwDurwte+q699XFP8nPw2ENQLTR/kzbiX0YBYmzS4c/uHhf6d Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10223"; a="304173561" X-IronPort-AV: E=Sophos;i="5.88,279,1635231600"; d="scan'208";a="304173561" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2022 00:36:51 -0800 X-IronPort-AV: E=Sophos;i="5.88,279,1635231600"; d="scan'208";a="622997227" Received: from sjobrien-mobl3.ger.corp.intel.com (HELO localhost) ([10.252.25.241]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jan 2022 00:36:49 -0800 From: Jani Nikula To: Ashish Arora , "joonas.lahtinen@linux.intel.com" , "rodrigo.vivi@intel.com" Cc: Linux Kernel Mailing List , "intel-gfx@lists.freedesktop.org" , ville.syrjala@linux.intel.com Subject: Re: [PATCH - v3] drm/i915: Discard large BIOS framebuffers causing display corruption. In-Reply-To: <31D69334-DEF9-41B7-968B-B847796926FF@outlook.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <31D69334-DEF9-41B7-968B-B847796926FF@outlook.com> Date: Tue, 11 Jan 2022 10:36:46 +0200 Message-ID: <87v8yq8y8x.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 11 Jan 2022, Ashish Arora wrote: > From: Ashish Arora > > On certain 4k panels and Macs, the BIOS framebuffer is larger than what > panel requires causing display corruption. Introduce a check for the same. > > > Signed-off-by: Ashish Arora > Reviewed-by: Aun-Ali Zaidi I'll defer to Ville on this one, Cc'd. BR, Jani. > --- > V2 :- Use != instead of < and > > V3 :- Mention Macs (Thanks to Orlando) > drivers/gpu/drm/i915/display/intel_fbdev.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c > index 842c04e63..16b1c82b2 100644 > --- a/drivers/gpu/drm/i915/display/intel_fbdev.c > +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c > @@ -181,10 +181,10 @@ static int intelfb_create(struct drm_fb_helper *helper, > int ret; > > if (intel_fb && > - (sizes->fb_width > intel_fb->base.width || > - sizes->fb_height > intel_fb->base.height)) { > + (sizes->fb_width != intel_fb->base.width || > + sizes->fb_height != intel_fb->base.height)) { > drm_dbg_kms(&dev_priv->drm, > - "BIOS fb too small (%dx%d), we require (%dx%d)," > + "BIOS fb not valid (%dx%d), we require (%dx%d)," > " releasing it\n", > intel_fb->base.width, intel_fb->base.height, > sizes->fb_width, sizes->fb_height); -- Jani Nikula, Intel Open Source Graphics Center