From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 76564] [AMD Fusion E-350] HDMI refresh rates doesn't match expectations Date: Sat, 29 Mar 2014 16:29:19 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1219066511==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 53DDD6EE16 for ; Sat, 29 Mar 2014 09:29:19 -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 --===============1219066511== Content-Type: multipart/alternative; boundary="1396110559.62e70.26647"; charset="us-ascii" --1396110559.62e70.26647 Date: Sat, 29 Mar 2014 16:29:19 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=76564 --- Comment #35 from jeroen --- (In reply to comment #34) > Why not increase the ref_div? hardware frying? That way you can get the > clock exactly right. > > For example: 148.5 = 100 * 29.7 / 4 * 5 > 74.2 = 100 * 37.1 / 5 * 10 Just noticed that the clock values shown by xrandr are already rounded. So the 74.2MHz for 23.976fps actually is 74.17MHz. This would mean the PLL can never exactly generate the clock that is requested by the television I guess. Perhaps something else is wrong with the PLL then -- You are receiving this mail because: You are the assignee for the bug. --1396110559.62e70.26647 Date: Sat, 29 Mar 2014 16:29:19 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 35 on bug 76564 from 
(In reply to comment #34)
> Why not increase the ref_div? hardware frying? That way you can get the
> clock exactly right.
> 
> For example: 148.5 = 100 * 29.7 / 4 * 5
>              74.2  = 100 * 37.1 / 5 * 10

Just noticed that the clock values shown by xrandr are already rounded. So the
74.2MHz for 23.976fps actually is 74.17MHz. This would mean the PLL can never
exactly generate the clock that is requested by the television I guess.

Perhaps something else is wrong with the PLL then

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  • You are the assignee for the bug.
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