From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sonika Jindal Subject: [PATCH] drm/i915: Check live status before reading edid Date: Tue, 8 Sep 2015 16:51:56 +0530 Message-ID: <1441711316-21661-1-git-send-email-sonika.jindal@intel.com> References: <1441602135-2331-1-git-send-email-sonika.jindal@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id D39458982F for ; Tue, 8 Sep 2015 04:33:20 -0700 (PDT) In-Reply-To: <1441602135-2331-1-git-send-email-sonika.jindal@intel.com> 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 VGhlIEJzcGVjIGlzIHZlcnkgY2xlYXIgdGhhdCBMaXZlIHN0YXR1cyBtdXN0IGJlIGNoZWNrZWQg YWJvdXQgYmVmb3JlCnRyeWluZyB0byByZWFkIEVESUQgb3ZlciBEREMgY2hhbm5lbC4gVGhpcyBw YXRjaCBtYWtlcyBzdXJlIHRoYXQgSERNSQpFRElEIGlzIHJlYWQgb25seSB3aGVuIGxpdmUgc3Rh dHVzIHVzIHVwLgoKVGhlIGxpdmUgc3RhdHVzIGRvZXNuJ3Qgc2VlbSB0byBwZXJmb3JtIHZlcnkg Y29uc2lzdGVudCBhY3Jvc3MgdmFyaW91cwpwbGF0Zm9ybXMgd2hlbiB0ZXN0ZWQgd2l0aCBkaWZm ZXJlbnQgbW9uaXRvcnMuIFRoZSByZWFzb24gYmVoaW5kIHRoYXQgaXMKc29tZSBtb25pdG9ycyBh cmUgbGF0ZSB0byBwcm92aWRlIHJpZ2h0IHZvbHRhZ2UgdG8gc2V0IGxpdmVfc3RhdHVzIHVwLgpT bywgYWZ0ZXIgZ2V0dGluZyB0aGUgaW50ZXJydXB0LCBmb3IgYSBzbWFsbCBkdXJhdGlvbiwgbGl2 ZSBzdGF0dXMgcmVnCmZsdWN0dWF0ZXMsIGFuZCB0aGVuIHNldHRsZXMgZG93biBzaG93aW5nIHRo ZSBjb3JyZWN0IHN0YXVzLgoKVGhpcyBpcyBleHBsYWluZWQgaGVyZSBpbiwgaW4gYSByb3VnaCB3 YXk6CkhQRCBsaW5lICBfX19fX19fX19fX19fX19fCgkJCSB8XCBUMSA9IE1vbml0b3IgSG90cGx1 ZyBjYXVzaW5nIElSUQoJCQkgfCBcX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KCQkJIHwgfAogICAgICAgICAgICAgICAgICAgICAgICAgfCB8CgkJCSB8IHwgICBUMiA9IExp dmUgc3RhdHVzIGlzIHN0YWJsZQoJCQkgfCB8ICBfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCgkJCSB8IHwgL3wKTGl2ZSBzdGF0dXMgX19fX19fX19fX19fX3xffC8gfAoJCQkg fCB8ICB8CgkJCSB8IHwgIHwKCQkJIHwgfCAgfAoJCQlUMCBUMSAgVDIKCihCZXR3ZWVuIFQxIGFu ZCBUMiBMaXZlIHN0YXR1cyBmbHVjdHVhdGVzIG9yIGNhbiBiZSBldmVuIGxvdywgZGVwZW5kaW5n IG9uCiB0aGUgbW9uaXRvcikKCkFmdGVyIHNldmVyYWwgZXhwZXJpbWVudHMsIHdlIGhhdmUgY29u Y2x1ZGVkIHRoYXQgYSBtYXggZGVsYXkKb2YgMzBtcyBpcyBlbm91Z2ggdG8gYWxsb3cgdGhlIGxp dmUgc3RhdHVzIHRvIHNldHRsZSBkb3duIHdpdGgKbW9zdCBvZiB0aGUgbW9uaXRvcnMuIFRoaXMg dG90YWwgZGVsYXkgb2YgMzBtcyBoYXMgYmVlbiBzcGxpdCBpbnRvCmEgcmVzb2x1dGlvbiBvZiAz IHJldHJpZXMgb2YgMTBtcyBlYWNoLCBmb3IgdGhlIGJldHRlciBjYXNlcy4KClRoaXMgZGVsYXkg aXMga2VwdCBhdCAzMG1zLCBrZWVwaW5nIGluIGNvbnNpZGVyYXRpb24gdGhhdCwgSERDUCBjb21w bGlhbmNlCmV4cGVjdCB0aGUgSFBEIGhhbmRsZXIgdG8gcmVzcG9uZCBhIHBsdWcgb3V0IGluIDEw MG1zLCBieSBkaXNhYmxpbmcgcG9ydC4KCnYyOiBBZGRpbmcgY2hlY2tzIGZvciBWTFYvQ0hWIGFz IHdlbGwuIFJldXNpbmcgb2xkIGlieCBhbmQgZzR4IGZ1bmN0aW9ucwp0byBjaGVjayBkaWdpdGFs IHBvcnQgc3RhdHVzLiBBZGRpbmcgYSBzZXBhcmF0ZSBmdW5jdGlvbiB0byBnZXQgYnh0IGxpdmUK c3RhdHVzIChEYW5pZWwpCnYzOiBVc2luZyBpbnRlbF9lbmNvZGVyLT5ocGRfcGluIHRvIGNoZWNr IHRoZSBsaXZlIHN0YXR1cyAoU2l2YSkKTW92aW5nIHRoZSBsaXZlIHN0YXR1cyByZWFkIHRvIGlu dGVsX2hkbWlfcHJvYmUgYW5kIHBhc3NpbmcgcGFyYW1ldGVyCnRvIHJlYWQvbm90IHRvIHJlYWQg dGhlIGVkaWQuIChtZSkKdjQ6CiogQWRkZWQgbGl2ZSBzdGF0dXMgY2hlY2sgZm9yIGFsbCBwbGF0 Zm9ybXMgdXNpbmcKaW50ZWxfZGlnaXRhbF9wb3J0X2Nvbm5lY3RlZC4KKiBSZWJhc2VkIG9uIHRv cCBvZiBKYW5pJ3MgRFAgY2xlYW51cCBzZXJpZXMKKiBTb21lIG1vbml0b3JzIHRha2UgdGltZSBp biBzZXR0aW5nIHRoZSBsaXZlIHN0YXR1cy4gU28gcmV0cnkgZm9yIGZldwp0aW1lcyBpZiB0aGlz IGlzIGEgY29ubmVjdCBIUEQKdjU6IFJlbW92ZWQgZXh0cmEgImRybS9pOTE1IiBmcm9tIGNvbW1p dCBtZXNzYWdlLiBBZGRpbmcgU2hhc2hhbmsncyBzb2IKICAgIHdoaWNoIHdhcyBtaXNzZWQuCnY2 OiBEcm9wIHRoZSAoIWRldGVjdF9lZGlkICYmICFsaXZlX3N0YXR1cyBjaGVjaykgY2hlY2sgYmVj YXVzZSBmb3IgRERJCnBvcnRzIHdoaWNoIGFyZSBlbnVtZXJhdGVkIGFzIGhkbWkgYXMgd2VsbCBh cyBEUCwgd2UgZG9uJ3QgaGF2ZSBhCm1lY2hhbmlzbSB0byBkaWZmZXJlbnRpYXRlIGJldHdlZW4g RFAgYW5kIGhkbWkgaW5zaWRlIHRoZSBlbmNvZGVyJ3MKaG90X3BsdWcuIFRoaXMgbGVhZHMgdG8g Y2FsbCB0byB0aGUgaGRtaSdzIGhvdF9wbHVnIGhvb2sgZm9yIERQIGFzIHdlbGwKYXMgaGRtaSB3 aGljaCBsZWFkcyB0byBpc3N1ZXMgZHVyaW5nIHVucGx1ZyBiZWNhdXNlIG9mIHRoZSBhYm92ZSBj aGVjay4KClNpZ25lZC1vZmYtYnk6IFNoYXNoYW5rIFNoYXJtYSA8c2hhc2hhbmsuc2hhcm1hQGlu dGVsLmNvbT4KU2lnbmVkLW9mZi1ieTogU29uaWthIEppbmRhbCA8c29uaWthLmppbmRhbEBpbnRl bC5jb20+Ci0tLQogZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfaGRtaS5jIHwgICAyNiArKysr KysrKysrKysrKysrKysrLS0tLS0tLQogMSBmaWxlIGNoYW5nZWQsIDE5IGluc2VydGlvbnMoKyks IDcgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxf aGRtaS5jIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfaGRtaS5jCmluZGV4IDFlZGE3MWEu LmM2ZTkxNTYgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2hkbWkuYwor KysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9oZG1pLmMKQEAgLTEzMjksMjIgKzEzMjks MjMgQEAgaW50ZWxfaGRtaV91bnNldF9lZGlkKHN0cnVjdCBkcm1fY29ubmVjdG9yICpjb25uZWN0 b3IpCiB9CiAKIHN0YXRpYyBib29sCi1pbnRlbF9oZG1pX3NldF9lZGlkKHN0cnVjdCBkcm1fY29u bmVjdG9yICpjb25uZWN0b3IpCitpbnRlbF9oZG1pX3NldF9lZGlkKHN0cnVjdCBkcm1fY29ubmVj dG9yICpjb25uZWN0b3IsIGJvb2wgZm9yY2UpCiB7CiAJc3RydWN0IGRybV9pOTE1X3ByaXZhdGUg KmRldl9wcml2ID0gdG9faTkxNShjb25uZWN0b3ItPmRldik7CiAJc3RydWN0IGludGVsX2hkbWkg KmludGVsX2hkbWkgPSBpbnRlbF9hdHRhY2hlZF9oZG1pKGNvbm5lY3Rvcik7CiAJc3RydWN0IGlu dGVsX2VuY29kZXIgKmludGVsX2VuY29kZXIgPQogCQkmaGRtaV90b19kaWdfcG9ydChpbnRlbF9o ZG1pKS0+YmFzZTsKIAllbnVtIGludGVsX2Rpc3BsYXlfcG93ZXJfZG9tYWluIHBvd2VyX2RvbWFp bjsKLQlzdHJ1Y3QgZWRpZCAqZWRpZDsKKwlzdHJ1Y3QgZWRpZCAqZWRpZCA9IE5VTEw7CiAJYm9v bCBjb25uZWN0ZWQgPSBmYWxzZTsKIAogCXBvd2VyX2RvbWFpbiA9IGludGVsX2Rpc3BsYXlfcG9y dF9wb3dlcl9kb21haW4oaW50ZWxfZW5jb2Rlcik7CiAJaW50ZWxfZGlzcGxheV9wb3dlcl9nZXQo ZGV2X3ByaXYsIHBvd2VyX2RvbWFpbik7CiAKLQllZGlkID0gZHJtX2dldF9lZGlkKGNvbm5lY3Rv ciwKLQkJCSAgICBpbnRlbF9nbWJ1c19nZXRfYWRhcHRlcihkZXZfcHJpdiwKLQkJCQkJCSAgICBp bnRlbF9oZG1pLT5kZGNfYnVzKSk7CisJaWYgKGZvcmNlKQorCQllZGlkID0gZHJtX2dldF9lZGlk KGNvbm5lY3RvciwKKwkJCQkgICAgaW50ZWxfZ21idXNfZ2V0X2FkYXB0ZXIoZGV2X3ByaXYsCisJ CQkJICAgIGludGVsX2hkbWktPmRkY19idXMpKTsKIAogCWludGVsX2Rpc3BsYXlfcG93ZXJfcHV0 KGRldl9wcml2LCBwb3dlcl9kb21haW4pOwogCkBAIC0xMzc0LDYgKzEzNzUsMTcgQEAgdm9pZCBp bnRlbF9oZG1pX3Byb2JlKHN0cnVjdCBpbnRlbF9lbmNvZGVyICppbnRlbF9lbmNvZGVyKQogCQkJ ZW5jX3RvX2ludGVsX2hkbWkoJmludGVsX2VuY29kZXItPmJhc2UpOwogCXN0cnVjdCBpbnRlbF9j b25uZWN0b3IgKmludGVsX2Nvbm5lY3RvciA9CiAJCQkJaW50ZWxfaGRtaS0+YXR0YWNoZWRfY29u bmVjdG9yOworCXN0cnVjdCBkcm1faTkxNV9wcml2YXRlICpkZXZfcHJpdiA9IHRvX2k5MTUoaW50 ZWxfZW5jb2Rlci0+YmFzZS5kZXYpOworCWJvb2wgbGl2ZV9zdGF0dXMgPSBmYWxzZTsKKwl1bnNp Z25lZCBpbnQgcmV0cnkgPSAzOworCisJZG8geworCQlsaXZlX3N0YXR1cyA9IGludGVsX2RpZ2l0 YWxfcG9ydF9jb25uZWN0ZWQoZGV2X3ByaXYsCisJCQkJaGRtaV90b19kaWdfcG9ydChpbnRlbF9o ZG1pKSk7CisJCWlmIChsaXZlX3N0YXR1cykKKwkJCWJyZWFrOworCQltZGVsYXkoMTApOworCX0g d2hpbGUgKHJldHJ5LS0pOwogCiAJLyoKIAkgKiBXZSBhcmUgaGVyZSwgbWVhbnMgdGhlcmUgaXMg YSBob3RwbHVnIG9yIGEgZm9yY2UKQEAgLTEzODEsNyArMTM5Myw3IEBAIHZvaWQgaW50ZWxfaGRt aV9wcm9iZShzdHJ1Y3QgaW50ZWxfZW5jb2RlciAqaW50ZWxfZW5jb2RlcikKIAkgKiBEREMgYnVz IHRvIGNoZWNrIHRoZSBjdXJyZW50IHN0YXR1cyBvZiBIRE1JLgogCSAqLwogCWludGVsX2hkbWlf dW5zZXRfZWRpZCgmaW50ZWxfY29ubmVjdG9yLT5iYXNlKTsKLQlpZiAoaW50ZWxfaGRtaV9zZXRf ZWRpZCgmaW50ZWxfY29ubmVjdG9yLT5iYXNlKSkKKwlpZiAoaW50ZWxfaGRtaV9zZXRfZWRpZCgm aW50ZWxfY29ubmVjdG9yLT5iYXNlLCBsaXZlX3N0YXR1cykpCiAJCURSTV9ERUJVR19EUklWRVIo IkREQyBwcm9iZTogZ290IEVESURcbiIpOwogCWVsc2UKIAkJRFJNX0RFQlVHX0RSSVZFUigiRERD IHByb2JlOiBubyBFRElEXG4iKTsKQEAgLTE0MzIsNyArMTQ0NCw3IEBAIGludGVsX2hkbWlfZm9y Y2Uoc3RydWN0IGRybV9jb25uZWN0b3IgKmNvbm5lY3RvcikKIAlpZiAoY29ubmVjdG9yLT5zdGF0 dXMgIT0gY29ubmVjdG9yX3N0YXR1c19jb25uZWN0ZWQpCiAJCXJldHVybjsKIAotCWludGVsX2hk bWlfc2V0X2VkaWQoY29ubmVjdG9yKTsKKwlpbnRlbF9oZG1pX3NldF9lZGlkKGNvbm5lY3Rvciwg dHJ1ZSk7CiAJaGRtaV90b19kaWdfcG9ydChpbnRlbF9oZG1pKS0+YmFzZS50eXBlID0gSU5URUxf T1VUUFVUX0hETUk7CiB9CiAKLS0gCjEuNy4xMC40CgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBs aXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2ludGVsLWdmeAo=