From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nathan Ciobanu Subject: Re: [PATCH v5 1/2] drm/i915/dp: Limit link training clock recovery loop Date: Fri, 20 Jul 2018 13:17:55 -0700 Message-ID: <20180720201755.GA19949@nc-new> References: <1532036858-11743-1-git-send-email-nathan.d.ciobanu@linux.intel.com> <20180720192215.GI16907@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 1476E6F090 for ; Fri, 20 Jul 2018 20:25:28 +0000 (UTC) Content-Disposition: inline In-Reply-To: <20180720192215.GI16907@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Rodrigo Vivi Cc: intel-gfx@lists.freedesktop.org, Marc Herbert , Dhinakaran Pandiyan List-Id: intel-gfx@lists.freedesktop.org T24gRnJpLCBKdWwgMjAsIDIwMTggYXQgMTI6MjI6MTVQTSAtMDcwMCwgUm9kcmlnbyBWaXZpIHdy b3RlOgo+IE9uIFRodSwgSnVsIDE5LCAyMDE4IGF0IDAyOjQ3OjM4UE0gLTA3MDAsIE5hdGhhbiBD aW9iYW51IHdyb3RlOgo+ID4gTGltaXQgdGhlIGxpbmsgdHJhaW5pbmcgY2xvY2sgcmVjb3Zlcnkg bG9vcCB0byAxMCBhdHRlbXB0cyBhdAo+ID4gTEFORXhfQ1JfRE9ORSBwZXIgRFAgMS40IHNwZWMg c2VjdGlvbiAzLjUuMS4yLjIgYW5kIDgwIGF0dGVtcHRzIGZvcgo+ID4gcHJlLURQIDEuNCAoNCB2 b2x0YWdlIGxldmVscyB4IDQgcHJlZW1waGFzaXMgbGV2ZWxzIHgKPiA+IHggNSBpZGVudGljYWwg dm9sdGFnZXMgdHJpZXMpLiBTb21lIGZhdWx0eSBVU0ItQyBNU1QgaHVicyBjYW4KPiA+IGNhdXNl IHVzIHRvIGdldCBzdHVjayBpbiB0aGlzIGxvb3AgaW5kZWZpbml0ZWx5IHJlcXVlc3Rpbmcgc29t ZXRoaW5nCj4gPiBsaWtlOgo+ID4gCj4gPiAgICAgdm9sdGFnZSBzd2luZzogMCwgcHJlLWVtcGhh c2lzIGxldmVsOiAyCj4gPiAgICAgdm9sdGFnZSBzd2luZzogMSwgcHJlLWVtcGhhc2lzIGxldmVs OiAyCj4gPiAgICAgdm9sdGFnZSBzd2luZzogMCwgcHJlLWVtcGhhc2lzIGxldmVsOiAzCj4gPiAK PiA+IG92ZXIgYW5kIG92ZXIgc28gbWF4X3Zzd2luZyB3b3VsZCBuZXZlciBiZSByZWFjaGVkLAo+ ID4gZHJtX2RwX2Nsb2NrX3JlY292ZXJ5X29rKCkgd291bGQgbmV2ZXIgcmV0dXJuIHRydWUgYW5k IHZvbHRhZ2VfdHJpZXMKPiA+IHdvdWxkIGFsd2F5cyBnZXQgcmVzZXQgdG8gMS4gVGhlIGRyaXZl ciBzZW5kcyB0aG9zZSB2YWx1ZXMgdG8gdGhlIGh1Ygo+ID4gYnV0IHRoZSBodWIga2VlcHMgcmVx dWVzdGluZyBuZXcgdmFsdWVzIGV2ZXJ5IHRpbWUuCj4gPiAKPiA+IENoYW5nZXMgaW4gdjI6Cj4g PiAgICAgLSB1cGRhdGVkIGNvbW1pdCBtZXNzYWdlIChESywgTWFuYXNpKQo+ID4gICAgIC0gZGVm aW5lZCBEUF9EUDE0X01BWF9DUl9UUklFUyAoTWFyYykKPiA+ICAgICAtIG1hZGUgdGhlIGxvb3Ag aXRlcmF0ZSBmb3IgbWF4IDEwIHRpbWVzIChSb2RyaWdvLCBNYXJjKQo+ID4gCj4gPiBDaGFuZ2Vz IGluIHYzOgo+ID4gICAgIC0gY2hhbmdlZCBlcnJvciBtZXNzYWdlIHRvIHVzZSBEUF9EUDE0X01B WF9DUl9UUklFUwo+ID4gCj4gPiBDaGFuZ2VzIGluIHY0Ogo+ID4gICAgIC0gVXBkYXRlZCB0aGUg dGl0bGUgdG8gcmVmbGVjdCB0aGUgY2hhbmdlCj4gPiAgICAgLSBVcGRhdGVkIHRoZSBjb21taXQg bWVzc2FnZQo+ID4gICAgIC0gQWRkZWQgODAgYXR0ZW1wdHMgZm9yIHByZS1EUCAxLjQgZGV2aWNl cwo+ID4gCj4gPiBDaGFuZ2VzIGluIHY1Ogo+ID4gICAgIC0gUmVtb3ZlZCBEUF9EUDE0X01BWF9D Ul9UUklFUyBmcm9tIGRybQo+ID4gCj4gPiBDYzogRGhpbmFrYXJhbiBQYW5kaXlhbiA8ZGhpbmFr YXJhbi5wYW5kaXlhbkBpbnRlbC5jb20+Cj4gPiBDYzogUm9kcmlnbyBWaXZpIDxyb2RyaWdvLnZp dmlAaW50ZWwuY29tPgo+ID4gQ2M6IE1hcmMgSGVyYmVydCA8bWFyYy5oZXJiZXJ0QGludGVsLmNv bT4KPiA+IENjOiBNYW5hc2kgTmF2YXJlIDxtYW5hc2kuZC5uYXZhcmVAaW50ZWwuY29tPgo+ID4g U2lnbmVkLW9mZi1ieTogTmF0aGFuIENpb2JhbnUgPG5hdGhhbi5kLmNpb2JhbnVAbGludXguaW50 ZWwuY29tPgo+ID4gLS0tCj4gPiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHBfbGlua190 cmFpbmluZy5jIHwgMTYgKysrKysrKysrKysrKystLQo+ID4gIDEgZmlsZSBjaGFuZ2VkLCAxNCBp bnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQo+ID4gCj4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVy cy9ncHUvZHJtL2k5MTUvaW50ZWxfZHBfbGlua190cmFpbmluZy5jIGIvZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfZHBfbGlua190cmFpbmluZy5jCj4gPiBpbmRleCA0ZGE2ZTMzYzdmYTEuLjc5 MDNkZTdhNTRjOSAxMDA2NDQKPiA+IC0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2Rw X2xpbmtfdHJhaW5pbmcuYwo+ID4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHBf bGlua190cmFpbmluZy5jCj4gPiBAQCAtMTI5LDcgKzEyOSw3IEBAIHN0YXRpYyBib29sIGludGVs X2RwX2xpbmtfbWF4X3Zzd2luZ19yZWFjaGVkKHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHApCj4g PiAgaW50ZWxfZHBfbGlua190cmFpbmluZ19jbG9ja19yZWNvdmVyeShzdHJ1Y3QgaW50ZWxfZHAg KmludGVsX2RwKQo+ID4gIHsKPiA+ICAJdWludDhfdCB2b2x0YWdlOwo+ID4gLQlpbnQgdm9sdGFn ZV90cmllcywgbWF4X3Zzd2luZ190cmllczsKPiA+ICsJaW50IHZvbHRhZ2VfdHJpZXMsIG1heF92 c3dpbmdfdHJpZXMsIGNyX3RyaWVzLCBtYXhfY3JfdHJpZXM7Cj4gPiAgCXVpbnQ4X3QgbGlua19j b25maWdbMl07Cj4gPiAgCXVpbnQ4X3QgbGlua19idywgcmF0ZV9zZWxlY3Q7Cj4gPiAgCj4gPiBA QCAtMTcwLDkgKzE3MCwxOSBAQCBzdGF0aWMgYm9vbCBpbnRlbF9kcF9saW5rX21heF92c3dpbmdf cmVhY2hlZChzdHJ1Y3QgaW50ZWxfZHAgKmludGVsX2RwKQo+ID4gIAkJcmV0dXJuIGZhbHNlOwo+ ID4gIAl9Cj4gPiAgCj4gPiArCS8qIERQIDEuNCBzcGVjIGNsb2NrIHJlY292ZXJ5IHJldHJpZXMg ZGVmaW5lZCBidXQKPiAKPiBuaXA6IFByZWZlcnJlZCBrZXJuZWwgbXVsdGktbGluZSBjb21tZW50 IGlzOgo+IAo+IC8qCj4gICogU3RhcnQgY29tbWVudC4uCj4gICogc2Vjb25kIGxpbmUuLgo+ICAq Lwo+IAo+IGJ1dCB5ZWFoLCBJIHVuZGVyc3RhbmQgd2UgaGF2ZSBtYW55IHByZWNlZGVudCBjYXNl cyB1c2luZyB0aGUgb3RoZXIgc3R5bGUuLi4KPiAKPiBSZXZpZXdlZC1ieTogUm9kcmlnbyBWaXZp IDxyb2RyaWdvLnZpdmlAaW50ZWwuY29tPgo+IChiZXR0ZXIgd2l0aCBjb21tZW50IHVwZGF0ZWQg OykpCkFic29sdXRlbHkuIEkgbWFkZSB0aGUgY2hhbmdlIGFuZCBzZW50IHRoZSBwYXRjaCBhZ2Fp bi4gClRoYW5rcywgTmF0aGFuLgo+IAo+ID4gKwkgKiBmb3IgZGV2aWNlcyBwcmUtRFAgMS40IHdl IHNldCB0aGUgcmV0cnkgbGltaXQKPiA+ICsJICogdG8gNCAodm9sdGFnZSBsZXZlbHMpIHggNCAo cHJlZW1waGFzaXMgbGV2ZWxzKSB4Cj4gPiArCSAqIHggNSAoc2FtZSB2b2x0YWdlIHJldHJpZXMp ID0gODAgKG1heCBpdGVyYXRpb25zKQo+ID4gKwkgKi8KPiA+ICsJaWYgKGludGVsX2RwLT5kcGNk W0RQX0RQQ0RfUkVWXSA+PSBEUF9EUENEX1JFVl8xNCkKPiA+ICsJCW1heF9jcl90cmllcyA9IDEw Owo+ID4gKwllbHNlCj4gPiArCQltYXhfY3JfdHJpZXMgPSA4MDsKPiA+ICsKPiA+ICAJdm9sdGFn ZV90cmllcyA9IDE7Cj4gPiAgCW1heF92c3dpbmdfdHJpZXMgPSAwOwo+ID4gLQlmb3IgKDs7KSB7 Cj4gPiArCWZvciAoY3JfdHJpZXMgPSAwOyBjcl90cmllcyA8IG1heF9jcl90cmllczsgKytjcl90 cmllcykgewo+ID4gIAkJdWludDhfdCBsaW5rX3N0YXR1c1tEUF9MSU5LX1NUQVRVU19TSVpFXTsK PiA+ICAKPiA+ICAJCWRybV9kcF9saW5rX3RyYWluX2Nsb2NrX3JlY292ZXJ5X2RlbGF5KGludGVs X2RwLT5kcGNkKTsKPiA+IEBAIC0yMTYsNiArMjI2LDggQEAgc3RhdGljIGJvb2wgaW50ZWxfZHBf bGlua19tYXhfdnN3aW5nX3JlYWNoZWQoc3RydWN0IGludGVsX2RwICppbnRlbF9kcCkKPiA+ICAJ CQkrK21heF92c3dpbmdfdHJpZXM7Cj4gPiAgCj4gPiAgCX0KPiA+ICsJRFJNX0VSUk9SKCJGYWls ZWQgY2xvY2sgcmVjb3ZlcnkgJWQgdGltZXMsIGdpdmluZyB1cCFcbiIsIG1heF9jcl90cmllcyk7 Cj4gPiArCXJldHVybiBmYWxzZTsKPiA+ICB9Cj4gPiAgCj4gPiAgLyoKPiA+IC0tIAo+ID4gMS45 LjEKPiA+IAo+ID4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KPiA+IEludGVsLWdmeCBtYWlsaW5nIGxpc3QKPiA+IEludGVsLWdmeEBsaXN0cy5mcmVlZGVz a3RvcC5vcmcKPiA+IGh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGlu Zm8vaW50ZWwtZ2Z4Cj4gCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwtZ2Z4QGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVs LWdmeAo=