From mboxrd@z Thu Jan 1 00:00:00 1970 From: Manasi Navare Subject: Re: [PATCH v7 1/6] drm/i915: Fallback to lower link rate and lane count during link training Date: Thu, 29 Sep 2016 09:05:01 -0700 Message-ID: <20160929160501.GA14141@intel.com> References: <1473984244-4349-2-git-send-email-manasi.d.navare@intel.com> <1474051514-5811-1-git-send-email-manasi.d.navare@intel.com> <87twd2kcfd.fsf@intel.com> <20160927152502.GA18889@intel.com> <8737klp8zu.fsf@intel.com> <20160929064150.GA13161@intel.com> <8737kjlzfr.fsf@intel.com> <20160929114419.GG28107@nuc-i3427.alporthouse.com> <20160929151054.GP4329@intel.com> <87eg42671g.fsf@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 5260D6E88E for ; Thu, 29 Sep 2016 16:04:19 +0000 (UTC) Content-Disposition: inline In-Reply-To: <87eg42671g.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 T24gVGh1LCBTZXAgMjksIDIwMTYgYXQgMDY6NDg6NDNQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3Jv dGU6Cj4gT24gVGh1LCAyOSBTZXAgMjAxNiwgVmlsbGUgU3lyasOkbMOkIDx2aWxsZS5zeXJqYWxh QGxpbnV4LmludGVsLmNvbT4gd3JvdGU6Cj4gPiBPbiBUaHUsIFNlcCAyOSwgMjAxNiBhdCAxMjo0 NDoxOVBNICswMTAwLCBDaHJpcyBXaWxzb24gd3JvdGU6Cj4gPj4gT24gVGh1LCBTZXAgMjksIDIw MTYgYXQgMDI6MjY6MTZQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3JvdGU6Cj4gPj4gPiBPbiBUaHUs IDI5IFNlcCAyMDE2LCBNYW5hc2kgTmF2YXJlIDxtYW5hc2kuZC5uYXZhcmVAaW50ZWwuY29tPiB3 cm90ZToKPiA+PiA+ID4gT24gVHVlLCBTZXAgMjcsIDIwMTYgYXQgMDg6MDc6MDFQTSArMDMwMCwg SmFuaSBOaWt1bGEgd3JvdGU6Cj4gPj4gPiA+PiBPbiBUdWUsIDI3IFNlcCAyMDE2LCBNYW5hc2kg TmF2YXJlIDxtYW5hc2kuZC5uYXZhcmVAaW50ZWwuY29tPiB3cm90ZToKPiA+PiA+ID4+ID4gT24g TW9uLCBTZXAgMjYsIDIwMTYgYXQgMDQ6Mzk6MzRQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3JvdGU6 Cj4gPj4gPiA+PiA+PiBPbiBGcmksIDE2IFNlcCAyMDE2LCBNYW5hc2kgTmF2YXJlIDxtYW5hc2ku ZC5uYXZhcmVAaW50ZWwuY29tPiB3cm90ZToKPiA+PiA+ID4+ID4+ID4gQWNjb3JkaW5nIHRvIHRo ZSBEaXNwbGF5UG9ydCBTcGVjLCBpbiBjYXNlIG9mIENsb2NrIFJlY292ZXJ5IGZhaWx1cmUKPiA+ PiA+ID4+ID4+ID4gdGhlIGxpbmsgdHJhaW5pbmcgc2VxdWVuY2Ugc2hvdWxkIGZhbGwgYmFjayB0 byB0aGUgbG93ZXIgbGluayByYXRlCj4gPj4gPiA+PiA+PiA+IGZvbGxvd2VkIGJ5IGxvd2VyIGxh bmUgY291bnQgdW50aWwgQ1Igc3VjY2VlZHMuCj4gPj4gPiA+PiA+PiA+IE9uIENSIHN1Y2Nlc3Ms IHRoZSBzZXF1ZW5jZSBwcm9jZWVkcyB3aXRoIENoYW5uZWwgRVEuCj4gPj4gPiA+PiA+PiA+IElu IGNhc2Ugb2YgQ2hhbm5lbCBFUSBmYWlsdXJlcywgaXQgc2hvdWxkIGZhbGxiYWNrIHRvCj4gPj4g PiA+PiA+PiA+IGxvd2VyIGxpbmsgcmF0ZSBhbmQgbGFuZSBjb3VudCBhbmQgc3RhcnQgdGhlIENS IHBoYXNlIGFnYWluLgo+ID4+ID4gPj4gPj4gCj4gPj4gPiA+PiA+PiBUaGlzIGNoYW5nZSBtYWtl cyB0aGUgbGluayB0cmFpbmluZyBzdGFydCBhdCB0aGUgbWF4IGxhbmUgY291bnQgYW5kIG1heAo+ ID4+ID4gPj4gPj4gbGluayByYXRlLiBUaGlzIGlzIG5vdCBpZGVhbCwgYXMgaXQgd2FzdGVzIHRo ZSBsaW5rLiBBbmQgaXQgaXMgbm90IGEKPiA+PiA+ID4+ID4+IHNwZWMgcmVxdWlyZW1lbnQuICJU aGUgTGluayBQb2xpY3kgTWFrZXIgb2YgdGhlIHVwc3RyZWFtIGRldmljZSBtYXkKPiA+PiA+ID4+ ID4+IGNob29zZSBhbnkgbGluayBjb3VudCBhbmQgbGluayByYXRlIGFzIGxvbmcgYXMgdGhleSBk byBub3QgZXhjZWVkIHRoZQo+ID4+ID4gPj4gPj4gY2FwYWJpbGl0aWVzIG9mIHRoZSBEUCByZWNl aXZlci4iCj4gPj4gPiA+PiA+PiAKPiA+PiA+ID4+ID4+IE91ciBjdXJyZW50IGNvZGUgc3RhcnRz IGF0IHRoZSBtaW5pbXVtIHJlcXVpcmVkIGJhbmR3aWR0aCBmb3IgdGhlIG1vZGUsCj4gPj4gPiA+ PiA+PiB0aGVyZWZvcmUgd2UgY2FuJ3QgZmFsbCBiYWNrIHRvIGxvd2VyIGxpbmsgcmF0ZSBhbmQg bGFuZSBjb3VudCB3aXRob3V0Cj4gPj4gPiA+PiA+PiByZWR1Y2luZyB0aGUgbW9kZS4KPiA+PiA+ ID4+ID4+IAo+ID4+ID4gPj4gPj4gQUZBSUNUIHRoaXMgcGF0Y2ggaGVyZSBtYWtlcyBpdCBwb3Nz aWJsZSBmb3IgdGhlIGxpbmsgYmFuZHdpZHRoIHRvIGRyb3AKPiA+PiA+ID4+ID4+IGJlbG93IHdo YXQgaXMgcmVxdWlyZWQgZm9yIHRoZSBtb2RlLiBUaGlzIGlzIHVuYWNjZXB0YWJsZS4KPiA+PiA+ ID4+ID4+IAo+ID4+ID4gPj4gPj4gQlIsCj4gPj4gPiA+PiA+PiBKYW5pLgo+ID4+ID4gPj4gPj4g Cj4gPj4gPiA+PiA+Pgo+ID4+ID4gPj4gPgo+ID4+ID4gPj4gPiBUaGFua3MgSmFuaSBmb3IgeW91 ciByZXZpZXcgY29tbWVudHMuCj4gPj4gPiA+PiA+IFllcyBpbiB0aGlzIGNoYW5nZSB3ZSBzdGFy dCBhdCB0aGUgbWF4IGxpbmsgcmF0ZSBhbmQgbGFuZSBjb3VudC4gVGhpcwo+ID4+ID4gPj4gPiBj aGFuZ2Ugd2FzIG1hZGUgYWNjb3JkaW5nIHRvIHRoZSBkZXNpZ24gZG9jdW1lbnQgZGlzY3Vzc2lv bnMgd2UgaGFkCj4gPj4gPiA+PiA+IGJlZm9yZSBzdHJhdGluZyB0aGlzIERQIFJlZGVzaWduIHBy b2plY3QuIFRoZSBtYWluIHJlYXNvbiBmb3Igc3RhcnRpbmcKPiA+PiA+ID4+ID4gYXQgdGhlIG1h eGxpbmsgcmF0ZSBhbmQgbWF4IGxhbmUgY291bnQgd2FzIGZvciBlbnN1cmluZyBwcm9wZXIKPiA+ PiA+ID4+ID4gYmVoYXZpb3Igb2YgRFAgTVNULiBJbiBjYXNlIG9mIERQIE1TVCwgd2Ugd2FudCB0 byB0cmFpbiB0aGUgbGluayBhdAo+ID4+ID4gPj4gPiB0aGUgbWF4aW11bSBzdXBwb3J0ZWQgbGlu ayByYXRlL2xhbmUgY291bnQgYmFzZWQgb24gYW4gZWFybHkvIHVwZnJvbnQKPiA+PiA+ID4+ID4g bGluayB0cmFpbmluZyByZXN1bHQgc28gdGhhdCB3ZSBkb250IGZhaWwgd2hlbiB3ZSB0cnkgdG8g Y29ubmVjdCBhCj4gPj4gPiA+PiA+IGhpZ2hlciByZXNvbHV0aW9uIG1vbml0b3IgYXMgYSBzZWNv bmQgbW9uaXRvci4gVGhpcyBhIHRyYWRlIG9mZgo+ID4+ID4gPj4gPiBiZXR3ZWVuIHdzdGluZyB0 aGUgbGluayBvciBoaWdoZXIgcG93ZXIgdnMuIG5lZWRpbmcgdG8gcmV0cmFpbiBmb3IKPiA+PiA+ ID4+ID4gZXZlcnkgbW9uaXRvciB0aGF0IHJlcXVlc3RzIGEgaGlnaGVyIEJXIGluIGNhc2Ugb2Yg RFAgTVNULgo+ID4+ID4gPj4gCj4gPj4gPiA+PiBXZSBhbHJlYWR5IHRyYWluIGF0IG1heCBiYW5k d2lkdGggZm9yIERQIE1TVCwgd2hpY2ggc2VlbXMgdG8gYmUgdGhlCj4gPj4gPiA+PiBzZW5zaWJs ZSB0aGluZyB0byBkby4KPiA+PiA+ID4+IAo+ID4+ID4gPj4gPiBBY3R1YWxseSB0aGlzIGlzIGFs c28gdGhlIHJlYXNvbiBmb3IgZW5hYmxpbmcgdXBmcm9udCBsaW5rIHRyYWluaW5nIGluCj4gPj4g PiA+PiA+IHRoZSBmb2xsb3dpbmcgcGF0Y2ggd2hlcmUgd2UgdHJhaW4gdGhlIGxpbmsgbXVjaCBh aGVhZCBpbiB0aGUgbW9kZXNldAo+ID4+ID4gPj4gPiBzZXF1ZW5jZSB0byB1bmRlcnN0YW5kIHRo ZSBsaW5rIHJhdGUgYW5kIGxhbmUgY291bnQgdmFsdWVzIGF0IHdoaWNoCj4gPj4gPiA+PiA+IHRo ZSBsaW5rIGNhbiBiZSBzdWNjZXNzZnVsbHkgdHJhaW5lZCBhbmQgdGhlbiB0aGUgbGluayB0cmFp bmluZwo+ID4+ID4gPj4gPiB0aHJvdWdoIG1vZGVzZXQgd2lsbCBhbHdheXMgc3RhcnQgYXQgdGhl IHVwZnJvbnQgdmFsdWVzIChtYXhpbXVtCj4gPj4gPiA+PiA+IHN1cHBvcnRlZCB2YWx1ZXMgb2Yg bGFuZSBjb3VudCBhbmQgbGluayByYXRlIGJhc2VkIG9uIHVwZnJvbnQgbGluawo+ID4+ID4gPj4g PiB0cmFpbmluZykuCj4gPj4gPiA+PiAKPiA+PiA+ID4+IEkgZG9uJ3Qgc2VlIGEgbmVlZCB0byBk byB0aGlzIGZvciBEUCBTU1QuCj4gPj4gPiA+PiAKPiA+PiA+ID4+ID4gQXMgcGVyIHRoZSBDVFMs IGFsbCB0aGUgdGVzdCA0LjMuMS40IHJlcXVpcmVzIHRoYXQgeW91IGZhbGwgYmFjayB0bwo+ID4+ ID4gPj4gPiB0aGUgbG93ZXIgbGluayByYXRlIGFmdGVyIHRyeWluZyB0byB0cmFpbiBhdCB0aGUg bWF4aW11bSBsaW5rIHJhdGUKPiA+PiA+ID4+ID4gYWR2ZXJ0aXNlZCB0aHJvdWdoIHRoZSBEUENE IHJlZ2lzdGVycy4KPiA+PiA+ID4+IAo+ID4+ID4gPj4gVGhhdCB0ZXN0IGRvZXMgbm90IHJlcXVp cmUgdGhlIHNvdXJjZSBEVVQgdG8gZGVmYXVsdCB0byBtYXhpbXVtIGxhbmUKPiA+PiA+ID4+IGNv dW50IG9yIGxpbmsgcmF0ZSBvZiB0aGUgc2luay4gVGhlIHNvdXJjZSBtYXkgZnJlZWx5IGNob29z ZSB0aGUgbGFuZQo+ID4+ID4gPj4gY291bnQgYW5kIGxpbmsgcmF0ZSBhcyBsb25nIGFzIHRoZXkg ZG9uJ3QgZXhjZWVkIHNpbmsgY2FwYWJpbGl0aWVzLgo+ID4+ID4gPj4gCj4gPj4gPiA+PiBGb3Ig dGhlIHB1cnBvc2VzIG9mIHRoZSB0ZXN0LCB0aGUgdGVzdCBzZXR1cCBjYW4gcmVxdWVzdCBzcGVj aWZpYwo+ID4+ID4gPj4gcGFyYW1ldGVycyB0byBiZSB1c2VkLCBidXQgdGhhdCBkb2VzIG5vdCBt ZWFuIHVzaW5nIG1heGltdW0gYnkKPiA+PiA+ID4+ICpkZWZhdWx0Ki4KPiA+PiA+ID4+IAo+ID4+ ID4gPj4gV2UgY3VycmVudGx5IGxhY2sgdGhlIGZlYXR1cmUgdG8gcmVkdWNlIGxhbmUgY291bnQg YW5kIGxpbmsgcmF0ZS4gVGhlCj4gPj4gPiA+PiBrZXkgdG8gdW5kZXJzdGFuZCBoZXJlIGlzIHRo YXQgc3RhcnRpbmcgYXQgbWF4IGFuZCByZWR1Y2luZyBkb3duIHRvIHRoZQo+ID4+ID4gPj4gc3Vm ZmljaWVudCBwYXJhbWV0ZXJzIGZvciB0aGUgbW9kZSAod2hpY2ggaXMgd2hlcmUgd2Ugc3RhcnQg bm93KSBvZmZlcnMKPiA+PiA+ID4+IG5vIHJlYWwgYmVuZWZpdCBmb3IgYW55IHVzZSBjYXNlLiBX aGF0IHdlJ3JlIGxhY2tpbmcgaXMgYSBmZWF0dXJlIHRvCj4gPj4gPiA+PiByZWR1Y2UgdGhlIGxp bmsgcGFyYW1ldGVycyAqYmVsb3cqIHdoYXQncyByZXF1aXJlZCBieSB0aGUgbW9kZSB0aGUKPiA+ PiA+ID4+IHVzZXJzcGFjZSB3YW50cy4gVGhpcyBjYW4gb25seSBiZSBhY2hpZXZlZCB0aHJvdWdo IGNvb3BlcmF0aW9uIHdpdGgKPiA+PiA+ID4+IHVzZXJzcGFjZS4KPiA+PiA+ID4+IAo+ID4+ID4g Pgo+ID4+ID4gPiBXZSBjYW4gdHJhaW4gYXQgdGhlIG9wdGltYWwgbGluayByYXRlIHJlcXVpcmVk IGZvciB0aGUgcmVxdWVzdGVkIG1vZGUgYXMKPiA+PiA+ID4gZG9uZSBpbiB0aGUgZXhpc3Rpbmcg aW1wbGVtZW50YXRpb24gYW5kIHJldHJhaW4gd2hlbmV2ZXIgdGhlIGxpbmsgdHJhaW5pbmcKPiA+ PiA+ID4gdGVzdCByZXF1ZXN0IGlzIHNlbnQuIAo+ID4+ID4gPiBGb3IgdGhlIHRlc3QgNC4zLjEu NCBpbiBDVFMsIGl0IGRvZXMgZm9yY2UgYSBmYWlsdXJlIGluIENSIGFuZCBleHBlY3RzIHRoZQo+ ID4+ID4gPiBkcml2ZXIgdG8gZmFsbCBiYWNrIHRvIGV2ZW4gbG93ZXIgbGluayByYXRlLiBXZSBk byBub3QgaW1wbGVtZW50IHRoaXMgaW4gdGhlCj4gPj4gPiA+IGN1cnJlbnQgZHJpdmVyIGFuZCBz byB0aGlzIHRlc3QgZmFpbHMuIENvdWxkIHlvdSBlbGFib3JhdGUgb24gaG93IHRoaXMgY2FuCj4g Pj4gPiA+IGJlIGFjaGlldmVkIHdpdGggdGhlIHRoZSBjb29wZXJhdGlvbiB3aXRoIHVzZXJzcGFj ZT8KPiA+PiA+ID4gU2hvdWxkIHdlIHNlbmQgYSB1ZXZlbnQgdG8gdGhlIHVzZXJzcGFjZSBhc2tp bmcgdG8gcmV0cnkgYXQgYSBsb3dlciByZXNvbHV0aW9uCj4gPj4gPiA+IGFmdGVyIHJldHJhaW5p bmcgYXQgdGhlIGxvd2VyIGxpbmsgcmF0ZT8KPiA+PiA+ID4gVGhpcyBpcyBwZXJ0dHkgbXVjaCB0 aGUgcGxhY2Ugd2hlcmUgbWFqb3JpdHkgb2YgdGhlIGNvbXBsaWFuY2UgdGVzdHMgYXJlIGZhaWxp bmcuCj4gPj4gPiA+IEhvdyBjYW4gd2UgcGFzcyBjb21wbGlhbmNlIHdpdGggcmVnYXJkcyB0byB0 aGlzIGZlYXR1cmU/Cj4gPj4gPiAKPiA+PiA+IFNvIGhlcmUncyBhbiBpZGVhIFZpbGxlIGFuZCBJ IGNhbWUgdXAgd2l0aC4gSXQncyBub3QgY29tcGxldGVseSB0aG91Z2h0Cj4gPj4gPiBvdXQgeWV0 LCBwcm9iYWJseSBoYXMgc29tZSB3cmlua2xlcyBzdGlsbCwgYnV0IHRoZW4gdGhlcmUgYXJlIHdy aW5rbGVzCj4gPj4gPiB3aXRoIHRoZSB1cGZyb250IGxpbmsgdHJhaW5pbmcgdG9vIChJJ2xsIGdl dCBiYWNrIHRvIHRob3NlIHNlcGFyYXRlbHkpLgo+ID4+ID4gCj4gPj4gPiBJZiBsaW5rIHRyYWlu aW5nIGZhaWxzIGR1cmluZyBtb2Rlc2V0IChlaXRoZXIgZm9yIHJlYWwgb3IgYmVjYXVzZSBpdCdz IGEKPiA+PiA+IHRlc3Qgc2luayB0aGF0IHdhbnRzIHRvIHRlc3QgZmFpbHVyZXMpLCB3ZSAxKSBz dG9yZSB0aGUgbGluayBwYXJhbWV0ZXJzCj4gPj4gPiBhcyBmYWlsaW5nLCAyKSBzZW5kIGEgdWV2 ZW50IHRvIHVzZXJzcGFjZSwgaG9wZWZ1bGx5IGdldHRpbmcgdGhlCj4gPj4gPiB1c2Vyc3BhY2Ug dG8gZG8gYW5vdGhlciBnZXQgbW9kZXMgYW5kIHRyeSBhZ2FpbiwgMykgcHJvcGFnZSBlcnJvcnMg ZnJvbQo+ID4+ID4gbW9kZXNldC4KPiA+PiAKPiA+PiB1c2Vyc3BhY2UgYWxyZWFkeSB0cmllcyB0 byBkbyBhIHJlcHJvYmUgYWZ0ZXIgYSBzZXRjcnRjIGZhaWxzLCB0byB0cnkKPiA+PiBhbmQgZ3Jh Y2VmdWxseSBoYW5kbGUgdGhlIHJhY2UgYmV0d2VlbiBob3RwbHVnIGJlaW5nIGluIGl0cyBldmVu dCBxdWV1ZQo+ID4+IGFuZCBwZXJmb3JtaW5nIHNldGNydGMsIGkuZS4gSSB0aGluayB0aGUgZXJy b3IgaXMgZW5vdWdoLgo+ID4KPiA+IEkgcHJlc3VtZSB3ZSB3YW50IHRoZSBtb2Rlc2V0IHRvIGJl IGFzeW5jLCBzbyBieSB0aGUgdGltZSB3ZSBub3RpY2UgdGhlCj4gPiBwcm9ibGVtIHdlJ3JlIG5v IGxvbmdlciBpbiB0aGUgaW9jdGwuCj4gCj4gSU9XLCB3ZSdsbCBqdXN0IG5lZWQgdG8gc2VuZCB0 aGUgaG90cGx1ZyB1ZXZlbnQgYW55d2F5Lgo+IAo+IEJSLAo+IEphbmkuCj4KCkkgYW0gZ29pbmcg dG8gdHJ5IHRvIGltcGxlbWVudCBhIHRoZSBjb2RlIHdoZXJlIGlmIHdlZmFpbCBsaW5rIHRyYWlu aW5nIGF0IGEgCnBhcnRpY3VsYXIgbGluayByYXRlIHRoZW4gaSBzZW5kIHRoZSB1ZXZlbnQgdG8g dGhlIHVzZXJzcGFjZSBzYXZpbmcgb2ZmIHRoZQp2YWx1ZXMgYXQgd2hpY2ggdGhlbGluayB0cmFp bmluZyBmYWlsZWQgc28gdGhhdCB0aGVzZSB2YWx1ZXMgY2FuIGJlIHVzZWQgaW4gdGhlIG5leHQK YXR0ZW1wdCBvZiB0aGUgbW9kZXNldCB0byBwcnVuZSB0aGUgbW9kZXMgYWNjb3JkaW5nbHkgYW5k IGxpbmsgdHJhaW5pbmcgc2hvdWxkIGJlCnRyaWVkIGluIHRoYXQgYXR0ZW1wdCB3aXRoIHRoZSBs b3dlciBsaW5rIHJhdGUuIFRoZSBob3BlIGlzIHRoYXQgdGhpcyB3aWxsIG1ha2UgdGhlCmNvbXBs aWFuY2UgdGVzdCA0LjMuMS40IGhhcHB5LgoKUmVnYXJkcwpNYW5hc2kKPiAtLSAKPiBKYW5pIE5p a3VsYSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9neSBDZW50ZXIKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJ bnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Au b3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==