From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH] drm/i915: Discard BIOS framebuffers too small to accommodate chosen mode Date: Wed, 23 Apr 2014 11:24:21 +0300 Message-ID: <20140423082421.GE18465@intel.com> References: <20140423071125.GS10722@phenom.ffwll.local> <1398239671-4135-1-git-send-email-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 8CFAE6EA16 for ; Wed, 23 Apr 2014 01:24:25 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1398239671-4135-1-git-send-email-chris@chris-wilson.co.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson Cc: Daniel Vetter , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org List-Id: intel-gfx@lists.freedesktop.org On Wed, Apr 23, 2014 at 08:54:31AM +0100, Chris Wilson wrote: > If the inherited BIOS framebuffer is smaller than the mode selected for > fbdev, then if we continue to use it then we cause display corruption as > we do not setup the panel fitter to upscale. > = > Regression from commit d978ef14456a38034f6c0e94a794129501f89200 > Author: Jesse Barnes > Date: Fri Mar 7 08:57:51 2014 -0800 > = > drm/i915: Wrap the preallocated BIOS framebuffer and preserve for KMS= fbcon v12 > = > v2: Add a debug message to track the discard of the BIOS fb. > v3: Ville pointed out the difference between ref/unref > = > Reported-by: Knut Petersen > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=3D77767 > Signed-off-by: Chris Wilson > Cc: Jesse Barnes > Reviewed-by: Daniel Vetter Reviewed-by: Ville Syrj=E4l=E4 > --- > drivers/gpu/drm/i915/intel_fbdev.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > = > diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/in= tel_fbdev.c > index b16116db6c37..fbe7941f88c8 100644 > --- a/drivers/gpu/drm/i915/intel_fbdev.c > +++ b/drivers/gpu/drm/i915/intel_fbdev.c > @@ -133,6 +133,16 @@ static int intelfb_create(struct drm_fb_helper *help= er, > = > mutex_lock(&dev->struct_mutex); > = > + if (intel_fb && > + (sizes->fb_width > intel_fb->base.width || > + sizes->fb_height > intel_fb->base.height)) { > + DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d)," > + " releasing it\n", > + intel_fb->base.width, intel_fb->base.height, > + sizes->fb_width, sizes->fb_height); > + drm_framebuffer_unreference(&intel_fb->base); > + intel_fb =3D ifbdev->fb =3D NULL; > + } > if (!intel_fb || WARN_ON(!intel_fb->obj)) { > DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n"); > ret =3D intelfb_alloc(helper, sizes); > -- = > 1.9.2 > = > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- = Ville Syrj=E4l=E4 Intel OTC