From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manasi Navare Subject: Re: [PATCH] drm/i915/dp: Validate cached link rate and lane count before retraining Date: Mon, 27 Mar 2017 09:53:36 -0700 Message-ID: <20170327165335.GA31272@intel.com> References: <1490310692-24468-1-git-send-email-manasi.d.navare@intel.com> <20170327134004.GL30290@intel.com> <87o9wm91wx.fsf@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id A87E16E2EC for ; Mon, 27 Mar 2017 16:49:23 +0000 (UTC) Content-Disposition: inline In-Reply-To: <87o9wm91wx.fsf@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Jani Nikula Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gTW9uLCBNYXIgMjcsIDIwMTcgYXQgMDY6MjY6MDZQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3Jv dGU6Cj4gT24gTW9uLCAyNyBNYXIgMjAxNywgVmlsbGUgU3lyasOkbMOkIDx2aWxsZS5zeXJqYWxh QGxpbnV4LmludGVsLmNvbT4gd3JvdGU6Cj4gPiBPbiBUaHUsIE1hciAyMywgMjAxNyBhdCAwNDox MTozMlBNIC0wNzAwLCBNYW5hc2kgTmF2YXJlIHdyb3RlOgo+ID4+IEN1cnJlbnRseSBpbnRlbF9k cF9jaGVja19saW5rX3N0YXR1cygpIHRyaWVzIHRvIHJldHJhaW4gdGhlIGxpbmsgaWYKPiA+PiBD bG9jayByZWNvdmVyeSBvciBDaGFubmVsIEVRIGZvciBhbnkgb2YgdGhlIGxhbmVzIGluZGljYXRl ZCBieQo+ID4+IGludGVsX2RwLT5sYW5lX2NvdW50IGlzIG5vdCBzZXQuIEhvd2V2ZXIgdGhlc2Ug dmFsdWVzIGNhY2hlZCBpbiBpbnRlbF9kcAo+ID4+IHN0cnVjdHVyZSBjYW4gYmUgc3RhbGUgaWYg bGluayB0cmFpbmluZyBoYXMgZmFpbGVkIGZvciB0aGVzZSB2YWx1ZXMKPiA+PiBkdXJpbmcgcHJl dmlvdXMgbW9kZXNldC4gT3IgdGhlc2UgdmFsdWVzIGNhbiBnZXQgc3RhbGUgc2luY2Ugd2UgaGF2 ZQo+ID4+IG5vdyByZSByZWFkIHRoZSBEUENEIHJlZ2lzdGVycyBvciBpdCBjYW4gYmUgMCBpbiBj YXNlIG9mIGNvbm5lY3RlZCBib290Cj4gPj4gY2FzZS4KPiA+PiAKPiA+PiBUaGlzIHBhdGNoIHZh bGlkYXRlcyB0aGVzZSB2YWx1ZXMgYWdhaW5zdCB0aGUgY29tbW9uX3JhdGVzIGFuZCBtYXggbGFu ZQo+ID4+IGNvdW50IHZhbHVlcy4KPiA+PiAKPiA+PiBUaGlzIGlzIGFic29sdXRlbHkgcmVxdWly ZWQgaW5jYXNlIHRoZSBjb21tb25fcmF0ZXMgb3IgbWF4IGxhbmUgY291bnQKPiA+PiBhcmUgbm93 IGRpZmZlcmVudCBkdWUgdG8gbGluayBmYWxsYmFjay4KPiA+PiAKPiA+PiBDYzogVmlsbGUgU3ly amFsYSA8dmlsbGUuc3lyamFsYUBsaW51eC5pbnRlbC5jb20+Cj4gPj4gQ2M6IEphbmkgTmlrdWxh IDxqYW5pLm5pa3VsYUBsaW51eC5pbnRlbC5jb20+Cj4gPj4gU2lnbmVkLW9mZi1ieTogTWFuYXNp IE5hdmFyZSA8bWFuYXNpLmQubmF2YXJlQGludGVsLmNvbT4KPiA+PiAtLS0KPiA+PiAgZHJpdmVy cy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYyB8IDI0ICsrKysrKysrKysrKysrKysrKysrKy0tLQo+ ID4+ICAxIGZpbGUgY2hhbmdlZCwgMjEgaW5zZXJ0aW9ucygrKSwgMyBkZWxldGlvbnMoLSkKPiA+ PiAKPiA+PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYyBiL2Ry aXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMKPiA+PiBpbmRleCBmZDk2YTZjLi41MWZhNmI1 IDEwMDY0NAo+ID4+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMKPiA+PiAr KysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9kcC5jCj4gPj4gQEAgLTI5NSw2ICsyOTUs MjMgQEAgc3RhdGljIGludCBpbnRlbF9kcF9saW5rX3JhdGVfaW5kZXgoc3RydWN0IGludGVsX2Rw ICppbnRlbF9kcCwKPiA+PiAgCXJldHVybiAtMTsKPiA+PiAgfQo+ID4+ICAKPiA+PiArc3RhdGlj IGJvb2wgaW50ZWxfZHBfbGlua19wYXJhbXNfaXNfdmFsaWQoc3RydWN0IGludGVsX2RwICppbnRl bF9kcCkKPiA+PiArewo+ID4+ICsJaW50IGNvbW1vbl9yYXRlc1tEUF9NQVhfU1VQUE9SVEVEX1JB VEVTXTsKPiA+PiArCWludCBsaW5rX3JhdGVfaW5kZXg7Cj4gPj4gKwo+ID4+ICsJbGlua19yYXRl X2luZGV4ID0gaW50ZWxfZHBfbGlua19yYXRlX2luZGV4KGludGVsX2RwLAo+ID4+ICsJCQkJCQkg ICBjb21tb25fcmF0ZXMsCj4gPj4gKwkJCQkJCSAgIGludGVsX2RwLT5saW5rX3JhdGUpOwo+ID4K PiA+IEhtbS4gSSB0aG91Z2h0IHdlIHN0YXJ0ZWQgdG8gc3RvcmUgdGhlIGNvbW1vbiByYXRlcyBz b21ld2hlcmUgbW9yZQo+ID4gcGVybWFuZW50LCBvciBkaWQgSSBpbWFnaW5lIHRoYXQ/Cj4gCj4g VGhhdCBzZXJpZXMgZ290IHN0YWxsZWQgd2FpdGluZyBmb3IgTWFuYXNpJ3Mgc3R1ZmYgdG8gbGFu ZC4uLiB3aGljaAo+IG1lYW5zIGl0J3Mgbm93IGNvbmZsaWN0aW5nIGFuZCBwZW5kaW5nIHJlYmFz ZSwgYW5kIHN0aWxsIHdhaXRpbmcuIDooCj4gCj4gSi4KPgoKSG1tLCB5ZXMgYnV0IGlmIHlvdSB3 YW50IEkgY2FuIHdvcmsgb24gcmViYXNpbmcgaXQgYWZ0ZXIgdGhlc2UgdHdvIHBhdGNoZXMKbGFu ZC4gVGhhdCBzZXJpZXMgaXMgcmVhbGx5IHJlcXVpcmVkLgoKIAo+IAo+ID4KPiA+PiArCWlmIChs aW5rX3JhdGVfaW5kZXggPCAwKQo+ID4+ICsJCXJldHVybiBmYWxzZTsKPiA+PiArCWlmICghaW50 ZWxfZHAtPmxhbmVfY291bnQgfHwKPiA+PiArCSAgICAoaW50ZWxfZHAtPmxhbmVfY291bnQgPiBp bnRlbF9kcF9tYXhfbGFuZV9jb3VudChpbnRlbF9kcCkpKQo+ID4KPiA+IE5lZWRsZXNzIHBhcmVu cy4KPiA+CgpPaywgd2lsbCByZW1vdmUgdGhhdC4KCgo+ID4+ICsJCXJldHVybiBmYWxzZTsKPiA+ PiArCj4gPj4gKwlyZXR1cm4gdHJ1ZTsKPiA+PiArfQo+ID4+ICsKPiA+PiAgaW50IGludGVsX2Rw X2dldF9saW5rX3RyYWluX2ZhbGxiYWNrX3ZhbHVlcyhzdHJ1Y3QgaW50ZWxfZHAgKmludGVsX2Rw LAo+ID4+ICAJCQkJCSAgICBpbnQgbGlua19yYXRlLCB1aW50OF90IGxhbmVfY291bnQpCj4gPj4g IHsKPiA+PiBAQCAtNDIyNCw5ICs0MjQxLDEwIEBAIGludGVsX2RwX2NoZWNrX2xpbmtfc3RhdHVz KHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHApCj4gPj4gIAlpZiAoIXRvX2ludGVsX2NydGMoaW50 ZWxfZW5jb2Rlci0+YmFzZS5jcnRjKS0+YWN0aXZlKQo+ID4+ICAJCXJldHVybjsKPiA+PiAgCj4g Pj4gLQkvKiBGSVhNRTogd2UgbmVlZCB0byBzeW5jaHJvbml6ZSB0aGlzIHNvcnQgb2Ygc3R1ZmYg d2l0aCBoYXJkd2FyZQo+ID4+IC0JICogcmVhZG91dC4gQ3VycmVudGx5IGZhc3QgbGluayB0cmFp bmluZyBkb2Vzbid0IHdvcmsgb24gYm9vdC11cC4gKi8KPiA+Cj4gPiBZb3Ugc2hvdWxkbid0IHJl bW92ZSB0aGUgRklYTUUuIEl0J3Mgc3RpbGwgdG90YWxseSB2YWxpZC4KPiA+CgpCdXQgdGhhdCBj aGVjayBpcyBub3cgaW5jb3Jwb3JhdGVkIGluIHZhbGlkYXRpbmcgdGhlIHBhcmFtcy4gClNvIHdo eSBpcyBzZXBhcmF0ZSBjaGVjayByZXF1aXJlZD8KT3IgYXJlIHlvdSBqdXN0IHNheWluZyBsZWF2 ZSB0aGUgRklYTUUgY29tbWVudD8KCk1hbmFzaQoKCj4gPj4gLQlpZiAoIWludGVsX2RwLT5sYW5l X2NvdW50KQo+ID4+ICsJLyogVmFsaWRhdGUgdGhlIGNhY2hlZCB2YWx1ZXMgb2YgaW50ZWxfZHAt PmxpbmtfcmF0ZSBhbmQKPiA+PiArCSAqIGludGVsX2RwLT5sYW5lX2NvdW50IGJlZm9yZSBhdHRl bXB0aW5nIHRvIHJldHJhaW4uCj4gPj4gKwkgKi8KPiA+PiArCWlmICghaW50ZWxfZHBfbGlua19w YXJhbXNfaXNfdmFsaWQoaW50ZWxfZHApKQo+ID4+ICAJCXJldHVybjsKPiA+PiAgCj4gPj4gIAkv KiBSZXRyYWluIGlmIENoYW5uZWwgRVEgb3IgQ1Igbm90IG9rICovCj4gPj4gLS0gCj4gPj4gMi4x LjQKPiAKPiAtLSAKPiBKYW5pIE5pa3VsYSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9neSBD ZW50ZXIKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50 ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBz Oi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==