From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH 13/21] drm/dp: Do not busy-loop during link training Date: Mon, 5 Aug 2019 14:23:42 +0200 Message-ID: <20190805122350.8838-13-thierry.reding@gmail.com> References: <20190805122350.8838-1-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-ed1-x541.google.com (mail-ed1-x541.google.com [IPv6:2a00:1450:4864:20::541]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6BF746E42E for ; Mon, 5 Aug 2019 12:24:12 +0000 (UTC) Received: by mail-ed1-x541.google.com with SMTP id p15so78420320eds.8 for ; Mon, 05 Aug 2019 05:24:12 -0700 (PDT) Received: from localhost (pD9E51890.dip0.t-ipconnect.de. [217.229.24.144]) by smtp.gmail.com with ESMTPSA id t13sm19671268edd.13.2019.08.05.05.24.08 for (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 05 Aug 2019 05:24:08 -0700 (PDT) In-Reply-To: <20190805122350.8838-1-thierry.reding@gmail.com> 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 RnJvbTogVGhpZXJyeSBSZWRpbmcgPHRyZWRpbmdAbnZpZGlhLmNvbT4KClVzZSBtaWNyb3NlY29u ZCBzbGVlcHMgZm9yIHRoZSBjbG9jayByZWNvdmVyeSBhbmQgY2hhbm5lbCBlcXVhbGl6YXRpb24K ZGVsYXlzIGR1cmluZyBsaW5rIHRyYWluaW5nLiBUaGUgZHVyYXRpb24gb2YgdGhlc2UgZGVsYXlz IGNhbiBiZSBmcm9tCjEwMCB1cyB1cCB0byAxNiBtcy4gSXQgaXMgcnVkZSB0byBidXN5LWxvb3Ag Zm9yIHRoYXQgYW1vdW50IG9mIHRpbWUuCgpXaGlsZSBhdCBpdCwgYWxzbyBjb252ZXJ0IHRvIHN0 YW5kYXJkIGNvZGluZyBzdHlsZSBieSBwdXR0aW5nIHRoZQpvcGVuaW5nIGJyYWNlcyBpbiBhIGZ1 bmN0aW9uIGRlZmluaXRpb24gb24gYSBuZXcgbGluZS4KClNpZ25lZC1vZmYtYnk6IFRoaWVycnkg UmVkaW5nIDx0cmVkaW5nQG52aWRpYS5jb20+Ci0tLQogZHJpdmVycy9ncHUvZHJtL2RybV9kcF9o ZWxwZXIuYyB8IDMwICsrKysrKysrKysrKysrKysrKy0tLS0tLS0tLS0tLQogMSBmaWxlIGNoYW5n ZWQsIDE4IGluc2VydGlvbnMoKyksIDEyIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZl cnMvZ3B1L2RybS9kcm1fZHBfaGVscGVyLmMgYi9kcml2ZXJzL2dwdS9kcm0vZHJtX2RwX2hlbHBl ci5jCmluZGV4IDQxMTI1NzBkYmU2Ny4uMzQ0Zjg4N2ZlZjJjIDEwMDY0NAotLS0gYS9kcml2ZXJz L2dwdS9kcm0vZHJtX2RwX2hlbHBlci5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1fZHBfaGVs cGVyLmMKQEAgLTEyMCwzMyArMTIwLDM5IEBAIHU4IGRybV9kcF9nZXRfYWRqdXN0X3JlcXVlc3Rf cHJlX2VtcGhhc2lzKGNvbnN0IHU4IGxpbmtfc3RhdHVzW0RQX0xJTktfU1RBVFVTX1NJCiB9CiBF WFBPUlRfU1lNQk9MKGRybV9kcF9nZXRfYWRqdXN0X3JlcXVlc3RfcHJlX2VtcGhhc2lzKTsKIAot dm9pZCBkcm1fZHBfbGlua190cmFpbl9jbG9ja19yZWNvdmVyeV9kZWxheShjb25zdCB1OCBkcGNk W0RQX1JFQ0VJVkVSX0NBUF9TSVpFXSkgewotCWludCByZF9pbnRlcnZhbCA9IGRwY2RbRFBfVFJB SU5JTkdfQVVYX1JEX0lOVEVSVkFMXSAmCi0JCQkgIERQX1RSQUlOSU5HX0FVWF9SRF9NQVNLOwor dm9pZCBkcm1fZHBfbGlua190cmFpbl9jbG9ja19yZWNvdmVyeV9kZWxheShjb25zdCB1OCBkcGNk W0RQX1JFQ0VJVkVSX0NBUF9TSVpFXSkKK3sKKwl1bnNpZ25lZCBpbnQgcmRfaW50ZXJ2YWwgPSBk cGNkW0RQX1RSQUlOSU5HX0FVWF9SRF9JTlRFUlZBTF0gJgorCQkJCQlEUF9UUkFJTklOR19BVVhf UkRfTUFTSzsKIAogCWlmIChyZF9pbnRlcnZhbCA+IDQpCi0JCURSTV9ERUJVR19LTVMoIkFVWCBp bnRlcnZhbCAlZCwgb3V0IG9mIHJhbmdlIChtYXggNClcbiIsCisJCURSTV9ERUJVR19LTVMoIkFV WCBpbnRlcnZhbCAldSwgb3V0IG9mIHJhbmdlIChtYXggNClcbiIsCiAJCQkgICAgICByZF9pbnRl cnZhbCk7CiAKIAlpZiAocmRfaW50ZXJ2YWwgPT0gMCB8fCBkcGNkW0RQX0RQQ0RfUkVWXSA+PSBE UF9EUENEX1JFVl8xNCkKLQkJdWRlbGF5KDEwMCk7CisJCXJkX2ludGVydmFsID0gMTAwOwogCWVs c2UKLQkJbWRlbGF5KHJkX2ludGVydmFsICogNCk7CisJCXJkX2ludGVydmFsICo9IDQ7CisKKwl1 c2xlZXBfcmFuZ2UocmRfaW50ZXJ2YWwsIHJkX2ludGVydmFsICogMik7CiB9CiBFWFBPUlRfU1lN Qk9MKGRybV9kcF9saW5rX3RyYWluX2Nsb2NrX3JlY292ZXJ5X2RlbGF5KTsKIAotdm9pZCBkcm1f ZHBfbGlua190cmFpbl9jaGFubmVsX2VxX2RlbGF5KGNvbnN0IHU4IGRwY2RbRFBfUkVDRUlWRVJf Q0FQX1NJWkVdKSB7Ci0JaW50IHJkX2ludGVydmFsID0gZHBjZFtEUF9UUkFJTklOR19BVVhfUkRf SU5URVJWQUxdICYKLQkJCSAgRFBfVFJBSU5JTkdfQVVYX1JEX01BU0s7Cit2b2lkIGRybV9kcF9s aW5rX3RyYWluX2NoYW5uZWxfZXFfZGVsYXkoY29uc3QgdTggZHBjZFtEUF9SRUNFSVZFUl9DQVBf U0laRV0pCit7CisJdW5zaWduZWQgaW50IHJkX2ludGVydmFsID0gZHBjZFtEUF9UUkFJTklOR19B VVhfUkRfSU5URVJWQUxdICYKKwkJCQkJRFBfVFJBSU5JTkdfQVVYX1JEX01BU0s7CiAKIAlpZiAo cmRfaW50ZXJ2YWwgPiA0KQotCQlEUk1fREVCVUdfS01TKCJBVVggaW50ZXJ2YWwgJWQsIG91dCBv ZiByYW5nZSAobWF4IDQpXG4iLAorCQlEUk1fREVCVUdfS01TKCJBVVggaW50ZXJ2YWwgJXUsIG91 dCBvZiByYW5nZSAobWF4IDQpXG4iLAogCQkJICAgICAgcmRfaW50ZXJ2YWwpOwogCiAJaWYgKHJk X2ludGVydmFsID09IDApCi0JCXVkZWxheSg0MDApOworCQlyZF9pbnRlcnZhbCA9IDQwMDsKIAll bHNlCi0JCW1kZWxheShyZF9pbnRlcnZhbCAqIDQpOworCQlyZF9pbnRlcnZhbCAqPSA0OworCisJ dXNsZWVwX3JhbmdlKHJkX2ludGVydmFsLCByZF9pbnRlcnZhbCAqIDIpOwogfQogRVhQT1JUX1NZ TUJPTChkcm1fZHBfbGlua190cmFpbl9jaGFubmVsX2VxX2RlbGF5KTsKIAotLSAKMi4yMi4wCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwg bWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWw=