From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 91509] Depth render buffer corruption Date: Fri, 31 Jul 2015 23:02:18 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2041281818==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id DA3846EE07 for ; Fri, 31 Jul 2015 16:02:17 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============2041281818== Content-Type: multipart/alternative; boundary="1438383737.f17e1.537"; charset="UTF-8" --1438383737.f17e1.537 Date: Fri, 31 Jul 2015 23:02:17 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=91509 --- Comment #4 from Roland Scheidegger --- As a quick hunch based on your observations and some quick look in the code, it seems depth buffers need to be 128 byte aligned on r200 (and 64 byte on r100 though that's just based on the tile/untile code), but radeon_alloc_renderbuffer_storage() only does it to 64 bytes: (pitch = ((cpp * width + 63) & ~63) / cpp;) Could you try out if increasing that to 128 byte alignment there would help? For the heck of it I can't figure out though from where the window depth/colorbuffers get their alignment, so I've no idea how that's calculated there... Not sure right now on color buffers neither... -- You are receiving this mail because: You are the assignee for the bug. --1438383737.f17e1.537 Date: Fri, 31 Jul 2015 23:02:17 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 4 on bug 91509 from 
As a quick hunch based on your observations and some quick look in the code, it
seems depth buffers need to be 128 byte aligned on r200 (and 64 byte on r100
though that's just based on the tile/untile code), but
radeon_alloc_renderbuffer_storage() only does it to 64 bytes: (pitch = ((cpp *
width + 63) & ~63) / cpp;)
Could you try out if increasing that to 128 byte alignment there would help?
For the heck of it I can't figure out though from where the window
depth/colorbuffers get their alignment, so I've no idea how that's calculated
there...
Not sure right now on color buffers neither...

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