From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH v3 06/13] drm/dp: Do not busy-loop during link training Date: Mon, 21 Oct 2019 16:34:30 +0200 Message-ID: <20191021143437.1477719-7-thierry.reding@gmail.com> References: <20191021143437.1477719-1-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8DE696E11E for ; Mon, 21 Oct 2019 14:34:59 +0000 (UTC) Received: by mail-wr1-x444.google.com with SMTP id w18so13734860wrt.3 for ; Mon, 21 Oct 2019 07:34:59 -0700 (PDT) In-Reply-To: <20191021143437.1477719-1-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 bmN0aW9uIGRlZmluaXRpb24gb24gYSBuZXcgbGluZS4gQWxzbyBzd2l0Y2ggdG8KdXNpbmcgYW4g dW5zaWduZWQgaW50IGZvciB0aGUgQVVYIHJlYWQgaW50ZXJ2YWwgdG8gbWF0Y2ggdGhlIGRhdGEg dHlwZQpvZiB0aGUgcGFyYW1ldGVycyB0byB1c2xlZXBfcmFuZ2UoKS4KCnYyOiB1c2UgY29ycmVj dCBtdWx0aXBsaWVyIGZvciB0cmFpbmluZyBkZWxheXMgKFBoaWxpcHAgWmFiZWwpCnYzOiBjbGFy aWZ5IGRhdGEgdHlwZSBjaGFuZ2UgaW4gY29tbWl0IG1lc3NhZ2UKClNpZ25lZC1vZmYtYnk6IFRo aWVycnkgUmVkaW5nIDx0cmVkaW5nQG52aWRpYS5jb20+Ci0tLQogZHJpdmVycy9ncHUvZHJtL2Ry bV9kcF9oZWxwZXIuYyB8IDMwICsrKysrKysrKysrKysrKysrKy0tLS0tLS0tLS0tLQogMSBmaWxl IGNoYW5nZWQsIDE4IGluc2VydGlvbnMoKyksIDEyIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBh L2RyaXZlcnMvZ3B1L2RybS9kcm1fZHBfaGVscGVyLmMgYi9kcml2ZXJzL2dwdS9kcm0vZHJtX2Rw X2hlbHBlci5jCmluZGV4IDhmMmQ3YzQ4NTBjYS4uYWM4MDJiMDRmMTIwIDEwMDY0NAotLS0gYS9k cml2ZXJzL2dwdS9kcm0vZHJtX2RwX2hlbHBlci5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9kcm1f ZHBfaGVscGVyLmMKQEAgLTEyMCwzMyArMTIwLDM5IEBAIHU4IGRybV9kcF9nZXRfYWRqdXN0X3Jl cXVlc3RfcHJlX2VtcGhhc2lzKGNvbnN0IHU4IGxpbmtfc3RhdHVzW0RQX0xJTktfU1RBVFVTX1NJ CiB9CiBFWFBPUlRfU1lNQk9MKGRybV9kcF9nZXRfYWRqdXN0X3JlcXVlc3RfcHJlX2VtcGhhc2lz KTsKIAotdm9pZCBkcm1fZHBfbGlua190cmFpbl9jbG9ja19yZWNvdmVyeV9kZWxheShjb25zdCB1 OCBkcGNkW0RQX1JFQ0VJVkVSX0NBUF9TSVpFXSkgewotCWludCByZF9pbnRlcnZhbCA9IGRwY2Rb RFBfVFJBSU5JTkdfQVVYX1JEX0lOVEVSVkFMXSAmCi0JCQkgIERQX1RSQUlOSU5HX0FVWF9SRF9N QVNLOwordm9pZCBkcm1fZHBfbGlua190cmFpbl9jbG9ja19yZWNvdmVyeV9kZWxheShjb25zdCB1 OCBkcGNkW0RQX1JFQ0VJVkVSX0NBUF9TSVpFXSkKK3sKKwl1bnNpZ25lZCBsb25nIHJkX2ludGVy dmFsID0gZHBjZFtEUF9UUkFJTklOR19BVVhfUkRfSU5URVJWQUxdICYKKwkJCQkJIERQX1RSQUlO SU5HX0FVWF9SRF9NQVNLOwogCiAJaWYgKHJkX2ludGVydmFsID4gNCkKLQkJRFJNX0RFQlVHX0tN UygiQVVYIGludGVydmFsICVkLCBvdXQgb2YgcmFuZ2UgKG1heCA0KVxuIiwKKwkJRFJNX0RFQlVH X0tNUygiQVVYIGludGVydmFsICVsdSwgb3V0IG9mIHJhbmdlIChtYXggNClcbiIsCiAJCQkgICAg ICByZF9pbnRlcnZhbCk7CiAKIAlpZiAocmRfaW50ZXJ2YWwgPT0gMCB8fCBkcGNkW0RQX0RQQ0Rf UkVWXSA+PSBEUF9EUENEX1JFVl8xNCkKLQkJdWRlbGF5KDEwMCk7CisJCXJkX2ludGVydmFsID0g MTAwOwogCWVsc2UKLQkJbWRlbGF5KHJkX2ludGVydmFsICogNCk7CisJCXJkX2ludGVydmFsICo9 IDQgKiBVU0VDX1BFUl9NU0VDOworCisJdXNsZWVwX3JhbmdlKHJkX2ludGVydmFsLCByZF9pbnRl cnZhbCAqIDIpOwogfQogRVhQT1JUX1NZTUJPTChkcm1fZHBfbGlua190cmFpbl9jbG9ja19yZWNv dmVyeV9kZWxheSk7CiAKLXZvaWQgZHJtX2RwX2xpbmtfdHJhaW5fY2hhbm5lbF9lcV9kZWxheShj b25zdCB1OCBkcGNkW0RQX1JFQ0VJVkVSX0NBUF9TSVpFXSkgewotCWludCByZF9pbnRlcnZhbCA9 IGRwY2RbRFBfVFJBSU5JTkdfQVVYX1JEX0lOVEVSVkFMXSAmCi0JCQkgIERQX1RSQUlOSU5HX0FV WF9SRF9NQVNLOwordm9pZCBkcm1fZHBfbGlua190cmFpbl9jaGFubmVsX2VxX2RlbGF5KGNvbnN0 IHU4IGRwY2RbRFBfUkVDRUlWRVJfQ0FQX1NJWkVdKQoreworCXVuc2lnbmVkIGxvbmcgcmRfaW50 ZXJ2YWwgPSBkcGNkW0RQX1RSQUlOSU5HX0FVWF9SRF9JTlRFUlZBTF0gJgorCQkJCQkgRFBfVFJB SU5JTkdfQVVYX1JEX01BU0s7CiAKIAlpZiAocmRfaW50ZXJ2YWwgPiA0KQotCQlEUk1fREVCVUdf S01TKCJBVVggaW50ZXJ2YWwgJWQsIG91dCBvZiByYW5nZSAobWF4IDQpXG4iLAorCQlEUk1fREVC VUdfS01TKCJBVVggaW50ZXJ2YWwgJWx1LCBvdXQgb2YgcmFuZ2UgKG1heCA0KVxuIiwKIAkJCSAg ICAgIHJkX2ludGVydmFsKTsKIAogCWlmIChyZF9pbnRlcnZhbCA9PSAwKQotCQl1ZGVsYXkoNDAw KTsKKwkJcmRfaW50ZXJ2YWwgPSA0MDA7CiAJZWxzZQotCQltZGVsYXkocmRfaW50ZXJ2YWwgKiA0 KTsKKwkJcmRfaW50ZXJ2YWwgKj0gNCAqIFVTRUNfUEVSX01TRUM7CisKKwl1c2xlZXBfcmFuZ2Uo cmRfaW50ZXJ2YWwsIHJkX2ludGVydmFsICogMik7CiB9CiBFWFBPUlRfU1lNQk9MKGRybV9kcF9s aW5rX3RyYWluX2NoYW5uZWxfZXFfZGVsYXkpOwogCi0tIAoyLjIzLjAKCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QK ZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9w Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbA==