From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62FE7C48BE7 for ; Mon, 8 Jul 2019 08:43:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3724C2064B for ; Mon, 8 Jul 2019 08:43:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729527AbfGHInT (ORCPT ); Mon, 8 Jul 2019 04:43:19 -0400 Received: from antares.kleine-koenig.org ([94.130.110.236]:44782 "EHLO antares.kleine-koenig.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727189AbfGHInT (ORCPT ); Mon, 8 Jul 2019 04:43:19 -0400 Received: from localhost (localhost [127.0.0.1]) by antares.kleine-koenig.org (Postfix) with ESMTP id AE551714FFD; Mon, 8 Jul 2019 10:43:15 +0200 (CEST) Received: from antares.kleine-koenig.org ([127.0.0.1]) by localhost (antares.kleine-koenig.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cgCzf9JYqxoH; Mon, 8 Jul 2019 10:43:14 +0200 (CEST) Received: from [IPv6:2a02:8071:b5c2:53f8:5a:5ebe:44f8:d26c] (unknown [IPv6:2a02:8071:b5c2:53f8:5a:5ebe:44f8:d26c]) by antares.kleine-koenig.org (Postfix) with ESMTPSA; Mon, 8 Jul 2019 10:43:14 +0200 (CEST) Subject: Re: [PATCH 1/3] si2157: get chip id during probing From: =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= To: Andreas Kemnade Cc: Antti Palosaari , Mauro Carvalho Chehab , linux-media@vger.kernel.org References: <20190707205846.22964-1-uwe@kleine-koenig.org> <3ff87deb-9125-4696-8aa0-141ea7d773b9@kleine-koenig.org> Openpgp: preference=signencrypt Autocrypt: addr=uwe@kleine-koenig.org; 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<3ff87deb-9125-4696-8aa0-141ea7d773b9@kleine-koenig.org> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="uVx9JLc67anIJDPjzX2cTpLb4ojpFKIAB" Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --uVx9JLc67anIJDPjzX2cTpLb4ojpFKIAB Content-Type: multipart/mixed; boundary="jxGw8MZ9q0nJ00jcl1iI2uO1LUW9JGfxe"; protected-headers="v1" From: =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= To: Andreas Kemnade Cc: Antti Palosaari , Mauro Carvalho Chehab , linux-media@vger.kernel.org Message-ID: <545607da-accf-06c5-f5ae-43d28781f554@kleine-koenig.org> Subject: Re: [PATCH 1/3] si2157: get chip id during probing References: <20190707205846.22964-1-uwe@kleine-koenig.org> <3ff87deb-9125-4696-8aa0-141ea7d773b9@kleine-koenig.org> In-Reply-To: <3ff87deb-9125-4696-8aa0-141ea7d773b9@kleine-koenig.org> --jxGw8MZ9q0nJ00jcl1iI2uO1LUW9JGfxe Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hello Andreas, On 7/7/19 11:01 PM, Uwe Kleine-K=C3=B6nig wrote: > Hello, >=20 > On 7/7/19 10:58 PM, Uwe Kleine-K=C3=B6nig wrote: >> From: Andreas Kemnade >> >> If the si2157 is behind a e.g. si2168, the si2157 will >> at least in some situations not be readable after the si268 >> got the command 0101. It still accepts commands but the answer >> is just ffffff. So read the chip id before that so the >> information is not lost. >> >> The following line in kernel output is a symptome >> of that problem: >> si2157 7-0063: unknown chip version Si21255-\xffffffff\xffffffff\xffff= ffff >> >> Signed-off-by: Andreas Kemnade I wonder if you (or anyone else here reading this mail) has access to the datasheets of the involved chips? (i.e. si2168, si2157) I'd like to try understanding and eventually fix the addressed problem here properly. Best regards Uwe --jxGw8MZ9q0nJ00jcl1iI2uO1LUW9JGfxe-- --uVx9JLc67anIJDPjzX2cTpLb4ojpFKIAB Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEfnIqFpAYrP8+dKQLwfwUeK3K7AkFAl0jAh8ACgkQwfwUeK3K 7AlD9wf+MfLat7UmJ1HxF1jT42hFAYoMdP1soGEwAuV0HOIBvPPuqZu95jaFgoEE brVMU34l+xFlPGIE9UjZwtN6rm2vK4p/wILF4hZRQcL+75vSKy2cH9RCA5s5B+6e oA7lqT8MmyDcw8THL6S77sVgNNz/9X6La1Ts64haUQoHCQN9xKYpy4l8W0nq+0p9 iA4Ag86Ye5/iu/YMjwLYfdheYxGefABef9410yWR4YLBehYlsuhygkbunxpQjToN /qRcFSlD90IxRWFTfMHf95F7Q+qSZGPX/WCD2BWKxzy9Oo9sVFej6A42x7duxK2A 3vWI+8cF/Qhf6DpjDlXbR6rJ6BM0JA== =Fahs -----END PGP SIGNATURE----- --uVx9JLc67anIJDPjzX2cTpLb4ojpFKIAB--