From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manasi Navare Subject: [PATCH] drm/i915/dp: Validate cached link rate and lane count before retraining Date: Thu, 23 Mar 2017 16:11:32 -0700 Message-ID: <1490310692-24468-1-git-send-email-manasi.d.navare@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 97ED46E2AD for ; Thu, 23 Mar 2017 23:07:42 +0000 (UTC) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Q3VycmVudGx5IGludGVsX2RwX2NoZWNrX2xpbmtfc3RhdHVzKCkgdHJpZXMgdG8gcmV0cmFpbiB0 aGUgbGluayBpZgpDbG9jayByZWNvdmVyeSBvciBDaGFubmVsIEVRIGZvciBhbnkgb2YgdGhlIGxh bmVzIGluZGljYXRlZCBieQppbnRlbF9kcC0+bGFuZV9jb3VudCBpcyBub3Qgc2V0LiBIb3dldmVy IHRoZXNlIHZhbHVlcyBjYWNoZWQgaW4gaW50ZWxfZHAKc3RydWN0dXJlIGNhbiBiZSBzdGFsZSBp ZiBsaW5rIHRyYWluaW5nIGhhcyBmYWlsZWQgZm9yIHRoZXNlIHZhbHVlcwpkdXJpbmcgcHJldmlv dXMgbW9kZXNldC4gT3IgdGhlc2UgdmFsdWVzIGNhbiBnZXQgc3RhbGUgc2luY2Ugd2UgaGF2ZQpu b3cgcmUgcmVhZCB0aGUgRFBDRCByZWdpc3RlcnMgb3IgaXQgY2FuIGJlIDAgaW4gY2FzZSBvZiBj b25uZWN0ZWQgYm9vdApjYXNlLgoKVGhpcyBwYXRjaCB2YWxpZGF0ZXMgdGhlc2UgdmFsdWVzIGFn YWluc3QgdGhlIGNvbW1vbl9yYXRlcyBhbmQgbWF4IGxhbmUKY291bnQgdmFsdWVzLgoKVGhpcyBp cyBhYnNvbHV0ZWx5IHJlcXVpcmVkIGluY2FzZSB0aGUgY29tbW9uX3JhdGVzIG9yIG1heCBsYW5l IGNvdW50CmFyZSBub3cgZGlmZmVyZW50IGR1ZSB0byBsaW5rIGZhbGxiYWNrLgoKQ2M6IFZpbGxl IFN5cmphbGEgPHZpbGxlLnN5cmphbGFAbGludXguaW50ZWwuY29tPgpDYzogSmFuaSBOaWt1bGEg PGphbmkubmlrdWxhQGxpbnV4LmludGVsLmNvbT4KU2lnbmVkLW9mZi1ieTogTWFuYXNpIE5hdmFy ZSA8bWFuYXNpLmQubmF2YXJlQGludGVsLmNvbT4KLS0tCiBkcml2ZXJzL2dwdS9kcm0vaTkxNS9p bnRlbF9kcC5jIHwgMjQgKysrKysrKysrKysrKysrKysrKysrLS0tCiAxIGZpbGUgY2hhbmdlZCwg MjEgaW5zZXJ0aW9ucygrKSwgMyBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL2dw dS9kcm0vaTkxNS9pbnRlbF9kcC5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYwpp bmRleCBmZDk2YTZjLi41MWZhNmI1IDEwMDY0NAotLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9p bnRlbF9kcC5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMKQEAgLTI5NSw2 ICsyOTUsMjMgQEAgc3RhdGljIGludCBpbnRlbF9kcF9saW5rX3JhdGVfaW5kZXgoc3RydWN0IGlu dGVsX2RwICppbnRlbF9kcCwKIAlyZXR1cm4gLTE7CiB9CiAKK3N0YXRpYyBib29sIGludGVsX2Rw X2xpbmtfcGFyYW1zX2lzX3ZhbGlkKHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHApCit7CisJaW50 IGNvbW1vbl9yYXRlc1tEUF9NQVhfU1VQUE9SVEVEX1JBVEVTXTsKKwlpbnQgbGlua19yYXRlX2lu ZGV4OworCisJbGlua19yYXRlX2luZGV4ID0gaW50ZWxfZHBfbGlua19yYXRlX2luZGV4KGludGVs X2RwLAorCQkJCQkJICAgY29tbW9uX3JhdGVzLAorCQkJCQkJICAgaW50ZWxfZHAtPmxpbmtfcmF0 ZSk7CisJaWYgKGxpbmtfcmF0ZV9pbmRleCA8IDApCisJCXJldHVybiBmYWxzZTsKKwlpZiAoIWlu dGVsX2RwLT5sYW5lX2NvdW50IHx8CisJICAgIChpbnRlbF9kcC0+bGFuZV9jb3VudCA+IGludGVs X2RwX21heF9sYW5lX2NvdW50KGludGVsX2RwKSkpCisJCXJldHVybiBmYWxzZTsKKworCXJldHVy biB0cnVlOworfQorCiBpbnQgaW50ZWxfZHBfZ2V0X2xpbmtfdHJhaW5fZmFsbGJhY2tfdmFsdWVz KHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHAsCiAJCQkJCSAgICBpbnQgbGlua19yYXRlLCB1aW50 OF90IGxhbmVfY291bnQpCiB7CkBAIC00MjI0LDkgKzQyNDEsMTAgQEAgaW50ZWxfZHBfY2hlY2tf bGlua19zdGF0dXMoc3RydWN0IGludGVsX2RwICppbnRlbF9kcCkKIAlpZiAoIXRvX2ludGVsX2Ny dGMoaW50ZWxfZW5jb2Rlci0+YmFzZS5jcnRjKS0+YWN0aXZlKQogCQlyZXR1cm47CiAKLQkvKiBG SVhNRTogd2UgbmVlZCB0byBzeW5jaHJvbml6ZSB0aGlzIHNvcnQgb2Ygc3R1ZmYgd2l0aCBoYXJk d2FyZQotCSAqIHJlYWRvdXQuIEN1cnJlbnRseSBmYXN0IGxpbmsgdHJhaW5pbmcgZG9lc24ndCB3 b3JrIG9uIGJvb3QtdXAuICovCi0JaWYgKCFpbnRlbF9kcC0+bGFuZV9jb3VudCkKKwkvKiBWYWxp ZGF0ZSB0aGUgY2FjaGVkIHZhbHVlcyBvZiBpbnRlbF9kcC0+bGlua19yYXRlIGFuZAorCSAqIGlu dGVsX2RwLT5sYW5lX2NvdW50IGJlZm9yZSBhdHRlbXB0aW5nIHRvIHJldHJhaW4uCisJICovCisJ aWYgKCFpbnRlbF9kcF9saW5rX3BhcmFtc19pc192YWxpZChpbnRlbF9kcCkpCiAJCXJldHVybjsK IAogCS8qIFJldHJhaW4gaWYgQ2hhbm5lbCBFUSBvciBDUiBub3Qgb2sgKi8KLS0gCjIuMS40Cgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZngg bWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK