From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: Add debugfs to read any DPCD register Date: Wed, 08 Apr 2015 11:04:07 +0300 Message-ID: <87h9srjbbc.fsf@intel.com> References: <1428475209-26883-1-git-send-email-durgadoss.r@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id AF8F96E1CD for ; Wed, 8 Apr 2015 01:05:26 -0700 (PDT) In-Reply-To: <1428475209-26883-1-git-send-email-durgadoss.r@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Durgadoss R , intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gV2VkLCAwOCBBcHIgMjAxNSwgRHVyZ2Fkb3NzIFIgPGR1cmdhZG9zcy5yQGludGVsLmNvbT4g d3JvdGU6Cj4gVGhpcyBwYXRjaCBjcmVhdGVzIGEgY29ubmVjdG9yIHNwZWNpZmljIGRlYnVnZnMK PiBpbnRlcmZhY2UgdG8gcmVhZCBhbnkgcGFydGljdWxhciBEUENEIHJlZ2lzdGVyLgo+IFRoZSBE UENEIHJlZ2lzdGVyIGFkZHJlc3MgKGhleCBmb3JtYXQpIGlzIHdyaXR0ZW4KPiB0byAnaTkxNV9k cGNkX2FkZHInIGludGVyZmFjZSBhbmQgdGhlIGNvcnJlc3BvbmRpbmcKPiB2YWx1ZSBjYW4gYmUg cmVhZCBmcm9tICdpOTE1X2RwY2RfdmFsJyBpbnRlcmZhY2UuCj4KPiBFeGFtcGxlIHVzYWdlOgo+ IGVjaG8gMHg3MCA+IGk5MTVfZHBjZF9hZGRyCj4gY2F0IGk5MTVfZHBjZF92YWwKPiBEUENEWzB4 NzBdOjB4MQoKSSBhbSBzdGlsbCBub3Qgb3ZlcmpveWVkIGFib3V0IHRoZSBpbnRlcmZhY2UgKGJl Y2F1c2UgaXQgaGFzIGEgc3RhdGUpLApidXQgSSBkb24ndCBoYXZlIGFueXRoaW5nIGJldHRlciB0 byBzdWdnZXN0IGVpdGhlci4gSSdsbCBkZWZlciB0byBvdGhlcnMKdG8gbWFrZSB0aGUgdGFzdGUg anVkZ2VtZW50Li4uCgpSZXZpZXcgY29tbWVudHMgZm9yIHRoZSBpbXBsZW1lbnRhdGlvbiBpbmxp bmUuCgpCUiwKSmFuaS4KCgo+Cj4gU2lnbmVkLW9mZi1ieTogRHVyZ2Fkb3NzIFIgPGR1cmdhZG9z cy5yQGludGVsLmNvbT4KPiAtLS0KPiBUaGlzIHBhdGNoIGlzIGJhc2VkIG9uIHRvcCBvZiBKYW5p J3MgcGF0Y2g6Cj4gImFkZCBpOTE1IHNwZWNpZmljIGNvbm5lY3RvciBkZWJ1Z2ZzIGZpbGUgZm9y IERQQ0QiCj4gW2h0dHBzOi8vZnJlZWRlc2t0b3Aub3JnL3BhdGNoLzQzMzMyL10KCkFscmVhZHkg Y29tbWl0dGVkLgoKPgo+ICBkcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2RlYnVnZnMuYyB8IDEw MiArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKy0KPiAgZHJpdmVycy9ncHUvZHJt L2k5MTUvaW50ZWxfZHJ2LmggICAgfCAgIDEgKwo+ICAyIGZpbGVzIGNoYW5nZWQsIDEwMiBpbnNl cnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaTkxNV9kZWJ1Z2ZzLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2RlYnVnZnMu Ywo+IGluZGV4IDEwY2E1MTEuLjk5NTFkODQgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvZHJt L2k5MTUvaTkxNV9kZWJ1Z2ZzLmMKPiArKysgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2Rl YnVnZnMuYwo+IEBAIC00ODY1LDYgKzQ4NjUsMTAxIEBAIHN0YXRpYyBjb25zdCBzdHJ1Y3QgZmls ZV9vcGVyYXRpb25zIGk5MTVfZHBjZF9mb3BzID0gewo+ICAJLnJlbGVhc2UgPSBzaW5nbGVfcmVs ZWFzZSwKPiAgfTsKPiAgCj4gK3N0YXRpYyBzc2l6ZV90IGk5MTVfZHBjZF9hZGRyX3dyaXRlKHN0 cnVjdCBmaWxlICpmaWxlLCBjb25zdCBjaGFyIF9fdXNlciAqdWJ1ZiwKPiArCQkJCSAgICAgc2l6 ZV90IGxlbiwgbG9mZl90ICpvZmZwKQo+ICt7Cj4gKwlzdHJ1Y3Qgc2VxX2ZpbGUgKm0gPSBmaWxl LT5wcml2YXRlX2RhdGE7Cj4gKwlzdHJ1Y3QgZHJtX2Nvbm5lY3RvciAqY29ubmVjdG9yID0gbS0+ cHJpdmF0ZTsKPiArCXN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHAgPQo+ICsJCWVuY190b19pbnRl bF9kcCgmaW50ZWxfYXR0YWNoZWRfZW5jb2Rlcihjb25uZWN0b3IpLT5iYXNlKTsKPiArCXVuc2ln bmVkIGludCByZWdfYWRkcjsKPiArCWNoYXIgdG1wWzE2XTsKPiArCWludCByZXQ7Cj4gKwo+ICsJ aWYgKCFpbnRlbF9kcCkKPiArCQlyZXR1cm4gLUVJTlZBTDsKCkkgdGhpbmsgaXQncyBoaWdobHkg dW5saWtlbHkgdGhpcyB3aWxsIGJlIE5VTEwuIFlvdSdyZSBtb3JlIGxpa2VseSB0bwpvb3BzIGFi b3ZlIGlmIHNvbWV0aGluZyB3ZW50IHdyb25nIChzZWUgZW5jX3RvX2ludGVsX2RwIGFuZAppbnRl bF9hdHRhY2hlZF9lbmNvZGVyKS4gQWxzbywgLUVOT0RFVj8KCj4gKwo+ICsJaWYgKGxlbiA+PSBz aXplb2YodG1wKSkKPiArCQlyZXR1cm4gLUVJTlZBTDsKPiArCj4gKwlpZiAoY29weV9mcm9tX3Vz ZXIodG1wLCB1YnVmLCBsZW4pKQo+ICsJCXJldHVybiAtRUZBVUxUOwo+ICsKPiArCXRtcFtsZW5d ID0gJ1wwJzsKPiArCj4gKwlyZXQgPSBzc2NhbmYodG1wLCAiJXhcbiIsICZyZWdfYWRkcik7CgpT ZWUga3N0cnRvdWludC4KCj4gKwlpZiAocmV0ID09IDApCj4gKwkJcmV0dXJuIC1FSU5WQUw7Cj4g Kwo+ICsJaW50ZWxfZHAtPmRlYnVnZnNfZHBjZF9hZGRyID0gcmVnX2FkZHI7Cj4gKwo+ICsJcmV0 dXJuIGxlbjsKPiArfQo+ICsKPiArc3RhdGljIGludCBpOTE1X2RwY2RfYWRkcl9zaG93KHN0cnVj dCBzZXFfZmlsZSAqbSwgdm9pZCAqZGF0YSkKPiArewo+ICsJc3RydWN0IGRybV9jb25uZWN0b3Ig KmNvbm5lY3RvciA9IG0tPnByaXZhdGU7Cj4gKwlzdHJ1Y3QgaW50ZWxfZHAgKmludGVsX2RwID0K PiArCQllbmNfdG9faW50ZWxfZHAoJmludGVsX2F0dGFjaGVkX2VuY29kZXIoY29ubmVjdG9yKS0+ YmFzZSk7Cj4gKwo+ICsJaWYgKCFpbnRlbF9kcCkKPiArCQlyZXR1cm4gLUVJTlZBTDsKClNhbWUg YXMgYWJvdmUuCgo+ICsKPiArCXNlcV9wcmludGYobSwgIjB4JXhcbiIsIGludGVsX2RwLT5kZWJ1 Z2ZzX2RwY2RfYWRkcik7Cj4gKwo+ICsJcmV0dXJuIDA7Cj4gK30KPiArCj4gK3N0YXRpYyBpbnQg aTkxNV9kcGNkX2FkZHJfb3BlbihzdHJ1Y3QgaW5vZGUgKmlub2RlLCBzdHJ1Y3QgZmlsZSAqZmls ZSkKPiArewo+ICsJcmV0dXJuIHNpbmdsZV9vcGVuKGZpbGUsIGk5MTVfZHBjZF9hZGRyX3Nob3cs IGlub2RlLT5pX3ByaXZhdGUpOwo+ICt9Cj4gKwo+ICtzdGF0aWMgY29uc3Qgc3RydWN0IGZpbGVf b3BlcmF0aW9ucyBpOTE1X2RwY2RfYWRkcl9mb3BzID0gewo+ICsJLm93bmVyID0gVEhJU19NT0RV TEUsCj4gKwkub3BlbiA9IGk5MTVfZHBjZF9hZGRyX29wZW4sCj4gKwkucmVhZCA9IHNlcV9yZWFk LAo+ICsJLndyaXRlID0gaTkxNV9kcGNkX2FkZHJfd3JpdGUsCj4gKwkubGxzZWVrID0gc2VxX2xz ZWVrLAo+ICsJLnJlbGVhc2UgPSBzaW5nbGVfcmVsZWFzZSwKPiArfTsKPiArCj4gK3N0YXRpYyBp bnQgaTkxNV9kcGNkX3ZhbF9zaG93KHN0cnVjdCBzZXFfZmlsZSAqbSwgdm9pZCAqZGF0YSkKPiAr ewo+ICsJc3RydWN0IGRybV9jb25uZWN0b3IgKmNvbm5lY3RvciA9IG0tPnByaXZhdGU7Cj4gKwlz dHJ1Y3QgaW50ZWxfZHAgKmludGVsX2RwID0KPiArCQllbmNfdG9faW50ZWxfZHAoJmludGVsX2F0 dGFjaGVkX2VuY29kZXIoY29ubmVjdG9yKS0+YmFzZSk7Cj4gKwl1bnNpZ25lZCBpbnQgYWRkcjsK PiArCXU4IGJ1ZlsxXTsKCk1pZ2h0IGJlIG1vcmUgb2J2aW91cyB0byBqdXN0IGhhdmUgdTggdmFs LCBhbmQgdXNlIGEgcG9pbnRlciB0bwppdC4gKnNocnVnKi4KCj4gKwlpbnQgcmV0Owo+ICsKPiAr CWlmICghaW50ZWxfZHApCj4gKwkJcmV0dXJuIC1FSU5WQUw7CgpTYW1lIGFzIGFib3ZlLgoKPiAr Cj4gKwlhZGRyID0gaW50ZWxfZHAtPmRlYnVnZnNfZHBjZF9hZGRyOwo+ICsJcmV0ID0gZHJtX2Rw X2RwY2RfcmVhZGIoJmludGVsX2RwLT5hdXgsIGFkZHIsIGJ1Zik7Cj4gKwlpZiAocmV0IDwgMCkg ewo+ICsJCURSTV9FUlJPUigiZHBjZCByZWFkIGZvciAweCV4IGZhaWxlZDolZFxuIiwgYWRkciwg cmV0KTsKCkkgdGhpbmsgdGhlcmUnbGwgYWxyZWFkeSBiZSBlcnJvcnMgaW4gdGhlIGxvZyBhdCB0 aGlzIHBvaW50LiBUaGlzIGlzCnByb2JhYmx5IHJlZHVuZGFudC4KCj4gKwkJcmV0dXJuIHJldDsK PiArCX0KPiArCj4gKwlzZXFfcHJpbnRmKG0sICJEUENEWzB4JXhdOjB4JXhcbiIsIGFkZHIsIGJ1 ZlswXSk7CgpGb3IgYW4gaW50ZXJmYWNlIGJldHRlciBzdWl0ZWQgZm9yIHRvb2xzIHRoYW4gaHVt YW5zLCBJJ2QgZHJvcCBhbGwgdGhlCmZsdWZmIGFuZCBqdXN0IHByaW50IHRoZSBjb250ZW50LiBN YXliZSB1c2UgMHglMDJ4IGZvciBmb3JtYXQuCgo+ICsJcmV0dXJuIDA7Cj4gK30KPiArCj4gK3N0 YXRpYyBpbnQgaTkxNV9kcGNkX3ZhbF9vcGVuKHN0cnVjdCBpbm9kZSAqaW5vZGUsIHN0cnVjdCBm aWxlICpmaWxlKQo+ICt7Cj4gKwlyZXR1cm4gc2luZ2xlX29wZW4oZmlsZSwgaTkxNV9kcGNkX3Zh bF9zaG93LCBpbm9kZS0+aV9wcml2YXRlKTsKPiArfQo+ICsKPiArc3RhdGljIGNvbnN0IHN0cnVj dCBmaWxlX29wZXJhdGlvbnMgaTkxNV9kcGNkX3ZhbF9mb3BzID0gewo+ICsJLm93bmVyID0gVEhJ U19NT0RVTEUsCj4gKwkub3BlbiA9IGk5MTVfZHBjZF92YWxfb3BlbiwKPiArCS5yZWFkID0gc2Vx X3JlYWQsCj4gKwkubGxzZWVrID0gc2VxX2xzZWVrLAo+ICsJLnJlbGVhc2UgPSBzaW5nbGVfcmVs ZWFzZSwKPiArfTsKPiArCj4gIC8qKgo+ICAgKiBpOTE1X2RlYnVnZnNfY29ubmVjdG9yX2FkZCAt IGFkZCBpOTE1IHNwZWNpZmljIGNvbm5lY3RvciBkZWJ1Z2ZzIGZpbGVzCj4gICAqIEBjb25uZWN0 b3I6IHBvaW50ZXIgdG8gYSByZWdpc3RlcmVkIGRybV9jb25uZWN0b3IKPiBAQCAtNDg4Myw5ICs0 OTc4LDE0IEBAIGludCBpOTE1X2RlYnVnZnNfY29ubmVjdG9yX2FkZChzdHJ1Y3QgZHJtX2Nvbm5l Y3RvciAqY29ubmVjdG9yKQo+ICAJCXJldHVybiAtRU5PREVWOwo+ICAKPiAgCWlmIChjb25uZWN0 b3ItPmNvbm5lY3Rvcl90eXBlID09IERSTV9NT0RFX0NPTk5FQ1RPUl9EaXNwbGF5UG9ydCB8fAo+ IC0JICAgIGNvbm5lY3Rvci0+Y29ubmVjdG9yX3R5cGUgPT0gRFJNX01PREVfQ09OTkVDVE9SX2VE UCkKPiArCSAgICBjb25uZWN0b3ItPmNvbm5lY3Rvcl90eXBlID09IERSTV9NT0RFX0NPTk5FQ1RP Ul9lRFApIHsKPiAgCQlkZWJ1Z2ZzX2NyZWF0ZV9maWxlKCJpOTE1X2RwY2QiLCBTX0lSVUdPLCBy b290LCBjb25uZWN0b3IsCj4gIAkJCQkgICAgJmk5MTVfZHBjZF9mb3BzKTsKPiArCQlkZWJ1Z2Zz X2NyZWF0ZV9maWxlKCJpOTE1X2RwY2RfYWRkciIsIFNfSVJVR08gfCBTX0lXVVNSLAo+ICsJCQkJ cm9vdCwgY29ubmVjdG9yLCAmaTkxNV9kcGNkX2FkZHJfZm9wcyk7Cj4gKwkJZGVidWdmc19jcmVh dGVfZmlsZSgiaTkxNV9kcGNkX3ZhbCIsIFNfSVJVR08sIHJvb3QsCj4gKwkJCQljb25uZWN0b3Is ICZpOTE1X2RwY2RfdmFsX2ZvcHMpOwo+ICsJfQo+ICAKPiAgCXJldHVybiAwOwo+ICB9Cj4gZGlm ZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2Rydi5oIGIvZHJpdmVycy9ncHUv ZHJtL2k5MTUvaW50ZWxfZHJ2LmgKPiBpbmRleCA0Nzk5YjExLi4wNTk0YmFhIDEwMDY0NAo+IC0t LSBhL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVsX2Rydi5oCj4gKysrIGIvZHJpdmVycy9ncHUv ZHJtL2k5MTUvaW50ZWxfZHJ2LmgKPiBAQCAtNjQyLDYgKzY0Miw3IEBAIHN0cnVjdCBpbnRlbF9k cCB7Cj4gIAl1bnNpZ25lZCBsb25nIGxhc3RfcG93ZXJfY3ljbGU7Cj4gIAl1bnNpZ25lZCBsb25n IGxhc3RfcG93ZXJfb247Cj4gIAl1bnNpZ25lZCBsb25nIGxhc3RfYmFja2xpZ2h0X29mZjsKPiAr CXVuc2lnbmVkIGludCBkZWJ1Z2ZzX2RwY2RfYWRkcjsKPiAgCj4gIAlzdHJ1Y3Qgbm90aWZpZXJf YmxvY2sgZWRwX25vdGlmaWVyOwo+ICAKPiAtLSAKPiAxLjkuMQo+CgotLSAKSmFuaSBOaWt1bGEs IEludGVsIE9wZW4gU291cmNlIFRlY2hub2xvZ3kgQ2VudGVyCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCkludGVsLWdmeCBtYWlsaW5nIGxpc3QKSW50ZWwt Z2Z4QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21h aWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==