From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 56139] [bisected] kernel 3.7.0-rc1 breaks 6950 (CAYMAN) Date: Mon, 05 Nov 2012 06:58:17 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0706597823==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 333D59E709 for ; Sun, 4 Nov 2012 22:58:17 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0706597823== Content-Type: multipart/alternative; boundary="1352098697.e6466Dc40.20356"; charset="us-ascii" --1352098697.e6466Dc40.20356 Date: Mon, 5 Nov 2012 06:58:17 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=56139 --- Comment #11 from Alexandre Demers --- Found what is wrong with the help of a few printk and by comparing to the code being replaced. All the logic is good (going through crtc, disabling them, waiting for vblank) BUT setting "tmp |= EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;" is wrong. If I do as in the previous code by setting tmp = 0 and then continuing with: radeon_wait_for_vblank(rdev, i); WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp); everything works fine as before. What is expected from "tmp |= EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;"? From what I read with printk, it is far from a 0 or a 1. Is this normal? -- You are receiving this mail because: You are the assignee for the bug. --1352098697.e6466Dc40.20356 Date: Mon, 5 Nov 2012 06:58:17 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 11 on bug 56139 from 
Found what is wrong with the help of a few printk and by comparing to the code
being replaced. All the logic is good (going through crtc, disabling them,
waiting for vblank) BUT setting "tmp |=
EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;" is wrong.

If I do as in the previous code by setting tmp = 0 and then continuing with:
radeon_wait_for_vblank(rdev, i);
WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp);
everything works fine as before.

What is expected from "tmp |= EVERGREEN_CRTC_DISP_READ_REQUEST_DISABLE;"? From
what I read with printk, it is far from a 0 or a 1. Is this normal?

You are receiving this mail because:
  • You are the assignee for the bug.
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