From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from slow3-v.mail.gandi.net ([217.70.178.89]:57120 "EHLO slow3-v.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751532Ab1JAM1G convert rfc822-to-8bit (ORCPT ); Sat, 1 Oct 2011 08:27:06 -0400 Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [217.70.183.196]) by slow3-v.mail.gandi.net (Postfix) with ESMTP id B939438B94 for ; Sat, 1 Oct 2011 14:18:37 +0200 (CEST) From: =?iso-8859-1?Q?S=E9bastien_RAILLARD_=28COEXSI=29?= To: Cc: "Linux Media Mailing List" Subject: [DVB] CXD2099 - Question about the CAM clock Date: Sat, 1 Oct 2011 14:18:36 +0200 Message-ID: <000901cc8034$3fcb13f0$bf613bd0$@coexsi.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Content-Language: fr Sender: linux-media-owner@vger.kernel.org List-ID: Dear Oliver, I’ve done some tests with the CAM reader from Digital Devices based on Sony CXD2099 chip and I noticed some issues with some CAM: * SMIT CAM : working fine * ASTON CAM : working fine, except that it's crashing quite regularly * NEOTION CAM : no stream going out but access to the CAM menu is ok When looking at the CXD2099 driver code, I noticed the CAM clock (fMCLKI) is fixed at 9MHz using the 27MHz onboard oscillator and using the integer divider set to 3 (as MCLKI_FREQ=2). I was wondering if some CAM were not able to work correctly at such high clock frequency. So, I've tried to enable the NCO (numeric controlled oscillator) in order to setup a lower frequency for the CAM clock, but I wasn't successful, it's looking like the frequency must be around the 9MHz or I can't get any stream. Do you know a way to decrease this CAM clock frequency to do some testing? Best regards, Sebastien.