From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH] drm/i915/dp: Validate cached link rate and lane count before retraining Date: Mon, 27 Mar 2017 16:40:04 +0300 Message-ID: <20170327134004.GL30290@intel.com> References: <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 mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 12E6B6E1E6 for ; Mon, 27 Mar 2017 13:40:08 +0000 (UTC) Content-Disposition: inline In-Reply-To: <1490310692-24468-1-git-send-email-manasi.d.navare@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Manasi Navare Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCBNYXIgMjMsIDIwMTcgYXQgMDQ6MTE6MzJQTSAtMDcwMCwgTWFuYXNpIE5hdmFyZSB3 cm90ZToKPiBDdXJyZW50bHkgaW50ZWxfZHBfY2hlY2tfbGlua19zdGF0dXMoKSB0cmllcyB0byBy ZXRyYWluIHRoZSBsaW5rIGlmCj4gQ2xvY2sgcmVjb3Zlcnkgb3IgQ2hhbm5lbCBFUSBmb3IgYW55 IG9mIHRoZSBsYW5lcyBpbmRpY2F0ZWQgYnkKPiBpbnRlbF9kcC0+bGFuZV9jb3VudCBpcyBub3Qg c2V0LiBIb3dldmVyIHRoZXNlIHZhbHVlcyBjYWNoZWQgaW4gaW50ZWxfZHAKPiBzdHJ1Y3R1cmUg Y2FuIGJlIHN0YWxlIGlmIGxpbmsgdHJhaW5pbmcgaGFzIGZhaWxlZCBmb3IgdGhlc2UgdmFsdWVz Cj4gZHVyaW5nIHByZXZpb3VzIG1vZGVzZXQuIE9yIHRoZXNlIHZhbHVlcyBjYW4gZ2V0IHN0YWxl IHNpbmNlIHdlIGhhdmUKPiBub3cgcmUgcmVhZCB0aGUgRFBDRCByZWdpc3RlcnMgb3IgaXQgY2Fu IGJlIDAgaW4gY2FzZSBvZiBjb25uZWN0ZWQgYm9vdAo+IGNhc2UuCj4gCj4gVGhpcyBwYXRjaCB2 YWxpZGF0ZXMgdGhlc2UgdmFsdWVzIGFnYWluc3QgdGhlIGNvbW1vbl9yYXRlcyBhbmQgbWF4IGxh bmUKPiBjb3VudCB2YWx1ZXMuCj4gCj4gVGhpcyBpcyBhYnNvbHV0ZWx5IHJlcXVpcmVkIGluY2Fz ZSB0aGUgY29tbW9uX3JhdGVzIG9yIG1heCBsYW5lIGNvdW50Cj4gYXJlIG5vdyBkaWZmZXJlbnQg ZHVlIHRvIGxpbmsgZmFsbGJhY2suCj4gCj4gQ2M6IFZpbGxlIFN5cmphbGEgPHZpbGxlLnN5cmph bGFAbGludXguaW50ZWwuY29tPgo+IENjOiBKYW5pIE5pa3VsYSA8amFuaS5uaWt1bGFAbGludXgu aW50ZWwuY29tPgo+IFNpZ25lZC1vZmYtYnk6IE1hbmFzaSBOYXZhcmUgPG1hbmFzaS5kLm5hdmFy ZUBpbnRlbC5jb20+Cj4gLS0tCj4gIGRyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMgfCAy NCArKysrKysrKysrKysrKysrKysrKystLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDIxIGluc2VydGlv bnMoKyksIDMgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9p OTE1L2ludGVsX2RwLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9kcC5jCj4gaW5kZXgg ZmQ5NmE2Yy4uNTFmYTZiNSAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRl bF9kcC5jCj4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHAuYwo+IEBAIC0yOTUs NiArMjk1LDIzIEBAIHN0YXRpYyBpbnQgaW50ZWxfZHBfbGlua19yYXRlX2luZGV4KHN0cnVjdCBp bnRlbF9kcCAqaW50ZWxfZHAsCj4gIAlyZXR1cm4gLTE7Cj4gIH0KPiAgCj4gK3N0YXRpYyBib29s IGludGVsX2RwX2xpbmtfcGFyYW1zX2lzX3ZhbGlkKHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHAp Cj4gK3sKPiArCWludCBjb21tb25fcmF0ZXNbRFBfTUFYX1NVUFBPUlRFRF9SQVRFU107Cj4gKwlp bnQgbGlua19yYXRlX2luZGV4Owo+ICsKPiArCWxpbmtfcmF0ZV9pbmRleCA9IGludGVsX2RwX2xp bmtfcmF0ZV9pbmRleChpbnRlbF9kcCwKPiArCQkJCQkJICAgY29tbW9uX3JhdGVzLAo+ICsJCQkJ CQkgICBpbnRlbF9kcC0+bGlua19yYXRlKTsKCkhtbS4gSSB0aG91Z2h0IHdlIHN0YXJ0ZWQgdG8g c3RvcmUgdGhlIGNvbW1vbiByYXRlcyBzb21ld2hlcmUgbW9yZQpwZXJtYW5lbnQsIG9yIGRpZCBJ IGltYWdpbmUgdGhhdD8KCj4gKwlpZiAobGlua19yYXRlX2luZGV4IDwgMCkKPiArCQlyZXR1cm4g ZmFsc2U7Cj4gKwlpZiAoIWludGVsX2RwLT5sYW5lX2NvdW50IHx8Cj4gKwkgICAgKGludGVsX2Rw LT5sYW5lX2NvdW50ID4gaW50ZWxfZHBfbWF4X2xhbmVfY291bnQoaW50ZWxfZHApKSkKCk5lZWRs ZXNzIHBhcmVucy4KCj4gKwkJcmV0dXJuIGZhbHNlOwo+ICsKPiArCXJldHVybiB0cnVlOwo+ICt9 Cj4gKwo+ICBpbnQgaW50ZWxfZHBfZ2V0X2xpbmtfdHJhaW5fZmFsbGJhY2tfdmFsdWVzKHN0cnVj dCBpbnRlbF9kcCAqaW50ZWxfZHAsCj4gIAkJCQkJICAgIGludCBsaW5rX3JhdGUsIHVpbnQ4X3Qg bGFuZV9jb3VudCkKPiAgewo+IEBAIC00MjI0LDkgKzQyNDEsMTAgQEAgaW50ZWxfZHBfY2hlY2tf bGlua19zdGF0dXMoc3RydWN0IGludGVsX2RwICppbnRlbF9kcCkKPiAgCWlmICghdG9faW50ZWxf Y3J0YyhpbnRlbF9lbmNvZGVyLT5iYXNlLmNydGMpLT5hY3RpdmUpCj4gIAkJcmV0dXJuOwo+ICAK PiAtCS8qIEZJWE1FOiB3ZSBuZWVkIHRvIHN5bmNocm9uaXplIHRoaXMgc29ydCBvZiBzdHVmZiB3 aXRoIGhhcmR3YXJlCj4gLQkgKiByZWFkb3V0LiBDdXJyZW50bHkgZmFzdCBsaW5rIHRyYWluaW5n IGRvZXNuJ3Qgd29yayBvbiBib290LXVwLiAqLwoKWW91IHNob3VsZG4ndCByZW1vdmUgdGhlIEZJ WE1FLiBJdCdzIHN0aWxsIHRvdGFsbHkgdmFsaWQuCgo+IC0JaWYgKCFpbnRlbF9kcC0+bGFuZV9j b3VudCkKPiArCS8qIFZhbGlkYXRlIHRoZSBjYWNoZWQgdmFsdWVzIG9mIGludGVsX2RwLT5saW5r X3JhdGUgYW5kCj4gKwkgKiBpbnRlbF9kcC0+bGFuZV9jb3VudCBiZWZvcmUgYXR0ZW1wdGluZyB0 byByZXRyYWluLgo+ICsJICovCj4gKwlpZiAoIWludGVsX2RwX2xpbmtfcGFyYW1zX2lzX3ZhbGlk KGludGVsX2RwKSkKPiAgCQlyZXR1cm47Cj4gIAo+ICAJLyogUmV0cmFpbiBpZiBDaGFubmVsIEVR IG9yIENSIG5vdCBvayAqLwo+IC0tIAo+IDIuMS40CgotLSAKVmlsbGUgU3lyasOkbMOkCkludGVs IE9UQwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRl bC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6 Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK