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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 911A2C7618F for ; Mon, 15 Jul 2019 13:10:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58338206B8 for ; Mon, 15 Jul 2019 13:10:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730165AbfGONK0 (ORCPT ); Mon, 15 Jul 2019 09:10:26 -0400 Received: from mx3.molgen.mpg.de ([141.14.17.11]:34231 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730019AbfGONKZ (ORCPT ); Mon, 15 Jul 2019 09:10:25 -0400 Received: from rabammel.molgen.mpg.de (rabammel.molgen.mpg.de [141.14.30.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id 05B0E206695B3; Mon, 15 Jul 2019 15:10:22 +0200 (CEST) Subject: Re: [PATCH] drm/amd/display: Remove check for 0 kHz clock values To: Nicholas Kazlauskas , Alexander Deucher , Christian Koenig Cc: Harry Wentland , "linux-kernel@vger.kernel.org" , "amd-gfx@lists.freedesktop.org" References: <32619ed4-8a27-4e9c-5b99-ba826f1d163e@molgen.mpg.de> <36b486b8-05e6-afb3-f544-5ec1d32a4aa2@amd.com> From: Paul Menzel Message-ID: Date: Mon, 15 Jul 2019 15:10:20 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <36b486b8-05e6-afb3-f544-5ec1d32a4aa2@amd.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms060706010304050202040608" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a cryptographically signed message in MIME format. --------------ms060706010304050202040608 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Dear Nicholas, On 7/15/19 2:57 PM, Kazlauskas, Nicholas wrote: > On 7/15/19 6:34 AM, Paul Menzel wrote: >> From 09c1952466752033722b02d9c7e5532e1982f6d9 Mon Sep 17 00:00:00 2001= >> From: Paul Menzel >> Date: Sat, 13 Jul 2019 20:33:49 +0200 >> >> This basically reverts commit 00893681a0ff4 (drm/amd/display: Reject >> PPLib clock values if they are invalid). >> >> 0 kHz values are a thing on at least the boards below. >> >> 1. MSI MS-7A37/B350M MORTAR (MS-7A37), BIOS 1.G1 05/17/2018 >> 2. MSI B450M Mortar, 2400G on 4.19.8 >> 3. Gigabyte Technology Co., Ltd. X470 AORUS ULTRA GAMING/X470 AORUS >> ULTRA GAMING-CF, BIOS F30 04/16/2019 >> >> Asserting instead of giving a useful error message to the user, so the= y >> can understand what is going on and how to possible fix things, might = be >> good for development, but is a bad user experience, so should not be o= n >> production systems. So, remove the check for now. >> >> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=3D107296 >> Tested: MSI MS-7A37/B350M MORTAR (MS-7A37) >> Signed-off-by: Paul Menzel >=20 > The two assertions should probably just be replaced with=20 > DC_LOG_DEBUG(...) instead - this will drop the callstack on boot for=20 > production systems. >=20 > Dropping the whole validation also means that we're going to be taking = > the table as-is and overriding the defaults - which isn't something we'= d=20 > actually want to do. >=20 > I do think it's fine to just reduce this to a debug message since you'd= =20 > see this on any 2400G/AM4 (as far as I'm aware), and only for the fCLK = > table (the tables always come from PPLIB/SMU). Where can I find more information on this for 2400G/AM4? What about 2200(?) and so on? If it=E2=80=99s expected, that there is 0 kHz values in there, the code s= hould deal with that, and filter that out. I do not understand, that the whole table is invalidated and default values are used instead. That sounds buggy. Kind regards, Paul >> --- >> drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 5 ----- >> 1 file changed, 5 deletions(-) >> >> diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/driver= s/gpu/drm/amd/display/dc/calcs/dcn_calcs.c >> index 1b4b51657f5e..edaaae5754fe 100644 >> --- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c >> +++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c >> @@ -1362,11 +1362,6 @@ static bool verify_clock_values(struct dm_pp_cl= ock_levels_with_voltage *clks) >> if (clks->num_levels =3D=3D 0) >> return false; >> =20 >> - for (i =3D 0; i < clks->num_levels; i++) >> - /* Ensure that the result is sane */ >> - if (clks->data[i].clocks_in_khz =3D=3D 0) >> - return false; >> - >> return true; >> } --------------ms060706010304050202040608 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC EFowggUSMIID+qADAgECAgkA4wvV+K8l2YEwDQYJKoZIhvcNAQELBQAwgYIxCzAJBgNVBAYT AkRFMSswKQYDVQQKDCJULVN5c3RlbXMgRW50ZXJwcmlzZSBTZXJ2aWNlcyBHbWJIMR8wHQYD VQQLDBZULVN5c3RlbXMgVHJ1c3QgQ2VudGVyMSUwIwYDVQQDDBxULVRlbGVTZWMgR2xvYmFs Um9vdCBDbGFzcyAyMB4XDTE2MDIyMjEzMzgyMloXDTMxMDIyMjIzNTk1OVowgZUxCzAJBgNV BAYTAkRFMUUwQwYDVQQKEzxWZXJlaW4genVyIEZvZXJkZXJ1bmcgZWluZXMgRGV1dHNjaGVu IEZvcnNjaHVuZ3NuZXR6ZXMgZS4gVi4xEDAOBgNVBAsTB0RGTi1QS0kxLTArBgNVBAMTJERG Ti1WZXJlaW4gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgMjCCASIwDQYJKoZIhvcNAQEBBQAD ggEPADCCAQoCggEBAMtg1/9moUHN0vqHl4pzq5lN6mc5WqFggEcVToyVsuXPztNXS43O+FZs FVV2B+pG/cgDRWM+cNSrVICxI5y+NyipCf8FXRgPxJiZN7Mg9mZ4F4fCnQ7MSjLnFp2uDo0p eQcAIFTcFV9Kltd4tjTTwXS1nem/wHdN6r1ZB+BaL2w8pQDcNb1lDY9/Mm3yWmpLYgHurDg0 WUU2SQXaeMpqbVvAgWsRzNI8qIv4cRrKO+KA3Ra0Z3qLNupOkSk9s1FcragMvp0049ENF4N1 xDkesJQLEvHVaY4l9Lg9K7/AjsMeO6W/VRCrKq4Xl14zzsjz9AkH4wKGMUZrAcUQDBHHWekC AwEAAaOCAXQwggFwMA4GA1UdDwEB/wQEAwIBBjAdBgNVHQ4EFgQUk+PYMiba1fFKpZFK4OpL 4qIMz+EwHwYDVR0jBBgwFoAUv1kgNgB5oKAia4zV8mHSuCzLgkowEgYDVR0TAQH/BAgwBgEB /wIBAjAzBgNVHSAELDAqMA8GDSsGAQQBga0hgiwBAQQwDQYLKwYBBAGBrSGCLB4wCAYGZ4EM AQICMEwGA1UdHwRFMEMwQaA/oD2GO2h0dHA6Ly9wa2kwMzM2LnRlbGVzZWMuZGUvcmwvVGVs ZVNlY19HbG9iYWxSb290X0NsYXNzXzIuY3JsMIGGBggrBgEFBQcBAQR6MHgwLAYIKwYBBQUH MAGGIGh0dHA6Ly9vY3NwMDMzNi50ZWxlc2VjLmRlL29jc3ByMEgGCCsGAQUFBzAChjxodHRw Oi8vcGtpMDMzNi50ZWxlc2VjLmRlL2NydC9UZWxlU2VjX0dsb2JhbFJvb3RfQ2xhc3NfMi5j ZXIwDQYJKoZIhvcNAQELBQADggEBAIcL/z4Cm2XIVi3WO5qYi3FP2ropqiH5Ri71sqQPrhE4 eTizDnS6dl2e6BiClmLbTDPo3flq3zK9LExHYFV/53RrtCyD2HlrtrdNUAtmB7Xts5et6u5/ MOaZ/SLick0+hFvu+c+Z6n/XUjkurJgARH5pO7917tALOxrN5fcPImxHhPalR6D90Bo0fa3S PXez7vTXTf/D6OWST1k+kEcQSrCFWMBvf/iu7QhCnh7U3xQuTY+8npTD5+32GPg8SecmqKc2 2CzeIs2LgtjZeOJVEqM7h0S2EQvVDFKvaYwPBt/QolOLV5h7z/0HJPT8vcP9SpIClxvyt7bP ZYoaorVyGTkwggWNMIIEdaADAgECAgwcOtRQhH7u81j4jncwDQYJKoZIhvcNAQELBQAwgZUx CzAJBgNVBAYTAkRFMUUwQwYDVQQKEzxWZXJlaW4genVyIEZvZXJkZXJ1bmcgZWluZXMgRGV1 dHNjaGVuIEZvcnNjaHVuZ3NuZXR6ZXMgZS4gVi4xEDAOBgNVBAsTB0RGTi1QS0kxLTArBgNV BAMTJERGTi1WZXJlaW4gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkgMjAeFw0xNjExMDMxNTI0 NDhaFw0zMTAyMjIyMzU5NTlaMGoxCzAJBgNVBAYTAkRFMQ8wDQYDVQQIDAZCYXllcm4xETAP BgNVBAcMCE11ZW5jaGVuMSAwHgYDVQQKDBdNYXgtUGxhbmNrLUdlc2VsbHNjaGFmdDEVMBMG A1UEAwwMTVBHIENBIC0gRzAyMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnhx4 59Lh4WqgOs/Md04XxU2yFtfM15ZuJV0PZP7BmqSJKLLPyqmOrADfNdJ5PIGBto2JBhtRRBHd G0GROOvTRHjzOga95WOTeura79T21FWwwAwa29OFnD3ZplQs6HgdwQrZWNi1WHNJxn/4mA19 rNEBUc5urSIpZPvZi5XmlF3v3JHOlx3KWV7mUteB4pwEEfGTg4npPAJbp2o7arxQdoIq+Pu2 OsvqhD7Rk4QeaX+EM1QS4lqd1otW4hE70h/ODPy1xffgbZiuotWQLC6nIwa65Qv6byqlIX0q Zuu99Vsu+r3sWYsL5SBkgecNI7fMJ5tfHrjoxfrKl/ErTAt8GQIDAQABo4ICBTCCAgEwEgYD VR0TAQH/BAgwBgEB/wIBATAOBgNVHQ8BAf8EBAMCAQYwKQYDVR0gBCIwIDANBgsrBgEEAYGt IYIsHjAPBg0rBgEEAYGtIYIsAQEEMB0GA1UdDgQWBBTEiKUH7rh7qgwTv9opdGNSG0lwFjAf BgNVHSMEGDAWgBST49gyJtrV8UqlkUrg6kviogzP4TCBjwYDVR0fBIGHMIGEMECgPqA8hjpo dHRwOi8vY2RwMS5wY2EuZGZuLmRlL2dsb2JhbC1yb290LWcyLWNhL3B1Yi9jcmwvY2Fjcmwu Y3JsMECgPqA8hjpodHRwOi8vY2RwMi5wY2EuZGZuLmRlL2dsb2JhbC1yb290LWcyLWNhL3B1 Yi9jcmwvY2FjcmwuY3JsMIHdBggrBgEFBQcBAQSB0DCBzTAzBggrBgEFBQcwAYYnaHR0cDov L29jc3AucGNhLmRmbi5kZS9PQ1NQLVNlcnZlci9PQ1NQMEoGCCsGAQUFBzAChj5odHRwOi8v Y2RwMS5wY2EuZGZuLmRlL2dsb2JhbC1yb290LWcyLWNhL3B1Yi9jYWNlcnQvY2FjZXJ0LmNy dDBKBggrBgEFBQcwAoY+aHR0cDovL2NkcDIucGNhLmRmbi5kZS9nbG9iYWwtcm9vdC1nMi1j YS9wdWIvY2FjZXJ0L2NhY2VydC5jcnQwDQYJKoZIhvcNAQELBQADggEBABLpeD5FygzqOjj+ /lAOy20UQOGWlx0RMuPcI4nuyFT8SGmK9lD7QCg/HoaJlfU/r78ex+SEide326evlFAoJXIF jVyzNltDhpMKrPIDuh2N12zyn1EtagqPL6hu4pVRzcBpl/F2HCvtmMx5K4WN1L1fmHWLcSap dhXLvAZ9RG/B3rqyULLSNN8xHXYXpmtvG0VGJAndZ+lj+BH7uvd3nHWnXEHC2q7iQlDUqg0a wIqWJgdLlx1Q8Dg/sodv0m+LN0kOzGvVDRCmowBdWGhhusD+duKV66pBl+qhC+4LipariWaM qK5ppMQROATjYeNRvwI+nDcEXr2vDaKmdbxgDVwwggWvMIIEl6ADAgECAgweKlJIhfynPMVG /KIwDQYJKoZIhvcNAQELBQAwajELMAkGA1UEBhMCREUxDzANBgNVBAgMBkJheWVybjERMA8G A1UEBwwITXVlbmNoZW4xIDAeBgNVBAoMF01heC1QbGFuY2stR2VzZWxsc2NoYWZ0MRUwEwYD VQQDDAxNUEcgQ0EgLSBHMDIwHhcNMTcxMTE0MTEzNDE2WhcNMjAxMTEzMTEzNDE2WjCBizEL MAkGA1UEBhMCREUxIDAeBgNVBAoMF01heC1QbGFuY2stR2VzZWxsc2NoYWZ0MTQwMgYDVQQL DCtNYXgtUGxhbmNrLUluc3RpdHV0IGZ1ZXIgbW9sZWt1bGFyZSBHZW5ldGlrMQ4wDAYDVQQL DAVNUElNRzEUMBIGA1UEAwwLUGF1bCBNZW56ZWwwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw ggEKAoIBAQDIh/UR/AX/YQ48VWWDMLTYtXjYJyhRHMc81ZHMMoaoG66lWB9MtKRTnB5lovLZ enTIUyPsCrMhTqV9CWzDf6v9gOTWVxHEYqrUwK5H1gx4XoK81nfV8oGV4EKuVmmikTXiztGz peyDmOY8o/EFNWP7YuRkY/lPQJQBeBHYq9AYIgX4StuXu83nusq4MDydygVOeZC15ts0tv3/ 6WmibmZd1OZRqxDOkoBbY3Djx6lERohs3IKS6RKiI7e90rCSy9rtidJBOvaQS9wvtOSKPx0a +2pAgJEVzZFjOAfBcXydXtqXhcpOi2VCyl+7+LnnTz016JJLsCBuWEcB3kP9nJYNAgMBAAGj ggIxMIICLTAJBgNVHRMEAjAAMA4GA1UdDwEB/wQEAwIF4DAdBgNVHSUEFjAUBggrBgEFBQcD AgYIKwYBBQUHAwQwHQYDVR0OBBYEFHM0Mc3XjMLlhWpp4JufRELL4A/qMB8GA1UdIwQYMBaA FMSIpQfuuHuqDBO/2il0Y1IbSXAWMCAGA1UdEQQZMBeBFXBtZW56ZWxAbW9sZ2VuLm1wZy5k ZTB9BgNVHR8EdjB0MDigNqA0hjJodHRwOi8vY2RwMS5wY2EuZGZuLmRlL21wZy1nMi1jYS9w dWIvY3JsL2NhY3JsLmNybDA4oDagNIYyaHR0cDovL2NkcDIucGNhLmRmbi5kZS9tcGctZzIt Y2EvcHViL2NybC9jYWNybC5jcmwwgc0GCCsGAQUFBwEBBIHAMIG9MDMGCCsGAQUFBzABhido dHRwOi8vb2NzcC5wY2EuZGZuLmRlL09DU1AtU2VydmVyL09DU1AwQgYIKwYBBQUHMAKGNmh0 dHA6Ly9jZHAxLnBjYS5kZm4uZGUvbXBnLWcyLWNhL3B1Yi9jYWNlcnQvY2FjZXJ0LmNydDBC BggrBgEFBQcwAoY2aHR0cDovL2NkcDIucGNhLmRmbi5kZS9tcGctZzItY2EvcHViL2NhY2Vy dC9jYWNlcnQuY3J0MEAGA1UdIAQ5MDcwDwYNKwYBBAGBrSGCLAEBBDARBg8rBgEEAYGtIYIs AQEEAwYwEQYPKwYBBAGBrSGCLAIBBAMGMA0GCSqGSIb3DQEBCwUAA4IBAQCQs6bUDROpFO2F Qz2FMgrdb39VEo8P3DhmpqkaIMC5ZurGbbAL/tAR6lpe4af682nEOJ7VW86ilsIJgm1j0ueY aOuL8jrN4X7IF/8KdZnnNnImW3QVni6TCcc+7+ggci9JHtt0IDCj5vPJBpP/dKXLCN4M+exl GXYpfHgxh8gclJPY1rquhQrihCzHfKB01w9h9tWZDVMtSoy9EUJFhCXw7mYUsvBeJwZesN2B fndPkrXx6XWDdU3S1LyKgHlLIFtarLFm2Hb5zAUR33h+26cN6ohcGqGEEzgIG8tXS8gztEaj 1s2RyzmKd4SXTkKR3GhkZNVWy+gM68J7jP6zzN+cMYIDmjCCA5YCAQEwejBqMQswCQYDVQQG EwJERTEPMA0GA1UECAwGQmF5ZXJuMREwDwYDVQQHDAhNdWVuY2hlbjEgMB4GA1UECgwXTWF4 LVBsYW5jay1HZXNlbGxzY2hhZnQxFTATBgNVBAMMDE1QRyBDQSAtIEcwMgIMHipSSIX8pzzF RvyiMA0GCWCGSAFlAwQCAQUAoIIB8TAYBgkqhkiG9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqG SIb3DQEJBTEPFw0xOTA3MTUxMzEwMjFaMC8GCSqGSIb3DQEJBDEiBCAYokpZ1nUTZcWCZP/p ZAttM83VMpjH6ygOgPbYghi3TzBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjALBglg hkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFAMAcG BSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGJBgkrBgEEAYI3EAQxfDB6MGoxCzAJBgNVBAYTAkRF MQ8wDQYDVQQIDAZCYXllcm4xETAPBgNVBAcMCE11ZW5jaGVuMSAwHgYDVQQKDBdNYXgtUGxh bmNrLUdlc2VsbHNjaGFmdDEVMBMGA1UEAwwMTVBHIENBIC0gRzAyAgweKlJIhfynPMVG/KIw gYsGCyqGSIb3DQEJEAILMXygejBqMQswCQYDVQQGEwJERTEPMA0GA1UECAwGQmF5ZXJuMREw DwYDVQQHDAhNdWVuY2hlbjEgMB4GA1UECgwXTWF4LVBsYW5jay1HZXNlbGxzY2hhZnQxFTAT BgNVBAMMDE1QRyBDQSAtIEcwMgIMHipSSIX8pzzFRvyiMA0GCSqGSIb3DQEBAQUABIIBACCZ mHQnkKN2HHMCgWNsLbWXplJsQhw9ASy3q4fujiKPChX+k4bVtDorxARvIsWcvHttvHFDN4iL WEBaXfBXrtZH8ZhRHfE1Yw63u2krlwg6iXM8pnY6cmH9TuOqrZZPmn2bbVgVHOXI/d0u4CIt SqFV0onmgV1so8G7YWoRvr4jKmfVT+/72MZNh71xwUnsfdYzz/ou/1CjtymWAdmsNLHgE5kN U+zVtRkzOfgUAXTcH0EZbGSEq2JJAvvZ7PjJShdIRpJp7JNG5cuBw7D5aUkJnvDTSEnU4R+l VnhAjw/L/qWqAODkpfTObXcE5R1BPLeS1g7dzZ9wSZL0XoY3eXoAAAAAAAA= --------------ms060706010304050202040608--