From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH v2] drm/i915: Add debugfs to read any DPCD register Date: Thu, 16 Apr 2015 17:32:39 +0300 Message-ID: <20150416143239.GQ1237@intel.com> References: <1428493301-20293-1-git-send-email-durgadoss.r@intel.com> <87egnkp3p7.fsf@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 9485D6EA65 for ; Thu, 16 Apr 2015 07:32:45 -0700 (PDT) Content-Disposition: inline In-Reply-To: <87egnkp3p7.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: "Syrjala, Ville" , intel-gfx@lists.freedesktop.org, "Zanoni, Paulo R" List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCBBcHIgMTYsIDIwMTUgYXQgMDU6MDc6MDBQTSArMDMwMCwgSmFuaSBOaWt1bGEgd3Jv dGU6Cj4gT24gV2VkLCAwOCBBcHIgMjAxNSwgRHVyZ2Fkb3NzIFIgPGR1cmdhZG9zcy5yQGludGVs LmNvbT4gd3JvdGU6Cj4gPiBUaGlzIHBhdGNoIGNyZWF0ZXMgYSBjb25uZWN0b3Igc3BlY2lmaWMg ZGVidWdmcwo+ID4gaW50ZXJmYWNlIHRvIHJlYWQgYW55IHBhcnRpY3VsYXIgRFBDRCByZWdpc3Rl ci4KPiA+IFRoZSBEUENEIHJlZ2lzdGVyIGFkZHJlc3MgKGhleCBmb3JtYXQpIGlzIHdyaXR0ZW4K PiA+IHRvICdpOTE1X2RwY2RfYWRkcicgaW50ZXJmYWNlIGFuZCB0aGUgY29ycmVzcG9uZGluZwo+ ID4gdmFsdWUgY2FuIGJlIHJlYWQgZnJvbSAnaTkxNV9kcGNkX3ZhbCcgaW50ZXJmYWNlLgo+ID4K PiA+IEV4YW1wbGUgdXNhZ2U6Cj4gPiBlY2hvIDB4NzAgPiBpOTE1X2RwY2RfYWRkcgo+ID4gY2F0 IGk5MTVfZHBjZF92YWwKPiA+IDB4MQo+ID4KPiA+IHYyOiBBZGRyZXNzIEphbmkncyBjb21tZW50 cy4KPiAKPiBTbywgY29kZS13aXNlIHRoaXMgbG9va3MgZ29vZCB0byBtZS4KPiAKPiBCdXQgbGlr ZSBJIHNhaWQgaW4gbXkgcmV2aWV3IG9mIHYxLCBJIGFtIHVuZGVjaWRlZCBvbiB3aGV0aGVyIHdl IHdhbnQgdG8KPiBoYXZlIHRoaXMgaW50ZXJmYWNlIG9yIG5vdC4gSSBjb3VsZCByZWFsbHkgYmUg cGVyc3VhZGVkIGVpdGhlciB3YXkuCj4gCj4gUGVyaGFwcyBWaWxsZSBvciBQYXVsbyBoYXZlIGFu IG9waW5pb24/CgpJIHRoaW5rIGhhdmluZyB0aGUgYWJpbGl0eSB0byByZWFkIChhbmQgYWxzbyB3 cml0ZSBhY3R1YWxseSkgRFBDRCB3b3VsZApiZSBuaWNlLgoKU28gSSBsaWtlIHRoZSBpZGVhLCBi dXQgaXQgZG9lcyBzZWVtIGEgYml0IGxpbWl0ZWQgc2luY2UgaXQgZG9lc24ndAphbGxvdyB3cml0 ZXMuIFNvIHBlcmhhcHMgd2Ugc2hvdWxkIGp1c3QgZXhwb3NlIHRoZSBlbnRpcmUgRFBDRCBhcyBh CmJpbmFyeSBmaWxlIGFuZCBpbmNsdWRlIGEgdG9vbCBpbiBpLWctdCB0byByZWFkL3dyaXRlIGlu ZGl2aWR1YWwKcGllY2VzPwoKV2UgY291bGQgYWxzbyBoYXZlIGEgdG9vbCB0byBwYXJzZSB0aGUg ZW50aXJlIHRoaW5nIGxpa2Ugd2UgaGF2ZQpmb3IgdGhlIHZidCBzdHVmZi4KCj4gCj4gQlIsCj4g SmFuaS4KPiAKPiAKPiA+Cj4gPiBTaWduZWQtb2ZmLWJ5OiBEdXJnYWRvc3MgUiA8ZHVyZ2Fkb3Nz LnJAaW50ZWwuY29tPgo+ID4gLS0tCj4gPiAgZHJpdmVycy9ncHUvZHJtL2k5MTUvaTkxNV9kZWJ1 Z2ZzLmMgfCA4OCArKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKystCj4gPiAgZHJp dmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2LmggICAgfCAgMSArCj4gPiAgMiBmaWxlcyBjaGFu Z2VkLCA4OCBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gPgo+ID4gZGlmZiAtLWdpdCBh L2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZGVidWdmcy5jIGIvZHJpdmVycy9ncHUvZHJtL2k5 MTUvaTkxNV9kZWJ1Z2ZzLmMKPiA+IGluZGV4IDEwY2E1MTEuLmYxZjM2NWUgMTAwNjQ0Cj4gPiAt LS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pOTE1X2RlYnVnZnMuYwo+ID4gKysrIGIvZHJpdmVy cy9ncHUvZHJtL2k5MTUvaTkxNV9kZWJ1Z2ZzLmMKPiA+IEBAIC00ODY1LDYgKzQ4NjUsODcgQEAg c3RhdGljIGNvbnN0IHN0cnVjdCBmaWxlX29wZXJhdGlvbnMgaTkxNV9kcGNkX2ZvcHMgPSB7Cj4g PiAgCS5yZWxlYXNlID0gc2luZ2xlX3JlbGVhc2UsCj4gPiAgfTsKPiA+ICAKPiA+ICtzdGF0aWMg c3NpemVfdCBpOTE1X2RwY2RfYWRkcl93cml0ZShzdHJ1Y3QgZmlsZSAqZmlsZSwgY29uc3QgY2hh ciBfX3VzZXIgKnVidWYsCj4gPiArCQkJCSAgICAgc2l6ZV90IGxlbiwgbG9mZl90ICpvZmZwKQo+ ID4gK3sKPiA+ICsJc3RydWN0IHNlcV9maWxlICptID0gZmlsZS0+cHJpdmF0ZV9kYXRhOwo+ID4g KwlzdHJ1Y3QgZHJtX2Nvbm5lY3RvciAqY29ubmVjdG9yID0gbS0+cHJpdmF0ZTsKPiA+ICsJc3Ry dWN0IGludGVsX2RwICppbnRlbF9kcCA9Cj4gPiArCQllbmNfdG9faW50ZWxfZHAoJmludGVsX2F0 dGFjaGVkX2VuY29kZXIoY29ubmVjdG9yKS0+YmFzZSk7Cj4gPiArCXVuc2lnbmVkIGludCByZWdf YWRkcjsKPiA+ICsJY2hhciB0bXBbMTZdOwo+ID4gKwo+ID4gKwlpZiAobGVuID49IHNpemVvZih0 bXApKQo+ID4gKwkJcmV0dXJuIC1FSU5WQUw7Cj4gPiArCj4gPiArCWlmIChjb3B5X2Zyb21fdXNl cih0bXAsIHVidWYsIGxlbikpCj4gPiArCQlyZXR1cm4gLUVGQVVMVDsKPiA+ICsKPiA+ICsJdG1w W2xlbl0gPSAnXDAnOwo+ID4gKwo+ID4gKwlpZiAoa3N0cnRvdWludCh0bXAsIDE2LCAmcmVnX2Fk ZHIpKQo+ID4gKwkJcmV0dXJuIC1FSU5WQUw7Cj4gPiArCj4gPiArCWludGVsX2RwLT5kZWJ1Z2Zz X2RwY2RfYWRkciA9IHJlZ19hZGRyOwo+ID4gKwo+ID4gKwlyZXR1cm4gbGVuOwo+ID4gK30KPiA+ ICsKPiA+ICtzdGF0aWMgaW50IGk5MTVfZHBjZF9hZGRyX3Nob3coc3RydWN0IHNlcV9maWxlICpt LCB2b2lkICpkYXRhKQo+ID4gK3sKPiA+ICsJc3RydWN0IGRybV9jb25uZWN0b3IgKmNvbm5lY3Rv ciA9IG0tPnByaXZhdGU7Cj4gPiArCXN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHAgPQo+ID4gKwkJ ZW5jX3RvX2ludGVsX2RwKCZpbnRlbF9hdHRhY2hlZF9lbmNvZGVyKGNvbm5lY3RvciktPmJhc2Up Owo+ID4gKwo+ID4gKwlzZXFfcHJpbnRmKG0sICIweCV4XG4iLCBpbnRlbF9kcC0+ZGVidWdmc19k cGNkX2FkZHIpOwo+ID4gKwo+ID4gKwlyZXR1cm4gMDsKPiA+ICt9Cj4gPiArCj4gPiArc3RhdGlj IGludCBpOTE1X2RwY2RfYWRkcl9vcGVuKHN0cnVjdCBpbm9kZSAqaW5vZGUsIHN0cnVjdCBmaWxl ICpmaWxlKQo+ID4gK3sKPiA+ICsJcmV0dXJuIHNpbmdsZV9vcGVuKGZpbGUsIGk5MTVfZHBjZF9h ZGRyX3Nob3csIGlub2RlLT5pX3ByaXZhdGUpOwo+ID4gK30KPiA+ICsKPiA+ICtzdGF0aWMgY29u c3Qgc3RydWN0IGZpbGVfb3BlcmF0aW9ucyBpOTE1X2RwY2RfYWRkcl9mb3BzID0gewo+ID4gKwku b3duZXIgPSBUSElTX01PRFVMRSwKPiA+ICsJLm9wZW4gPSBpOTE1X2RwY2RfYWRkcl9vcGVuLAo+ ID4gKwkucmVhZCA9IHNlcV9yZWFkLAo+ID4gKwkud3JpdGUgPSBpOTE1X2RwY2RfYWRkcl93cml0 ZSwKPiA+ICsJLmxsc2VlayA9IHNlcV9sc2VlaywKPiA+ICsJLnJlbGVhc2UgPSBzaW5nbGVfcmVs ZWFzZSwKPiA+ICt9Owo+ID4gKwo+ID4gK3N0YXRpYyBpbnQgaTkxNV9kcGNkX3ZhbF9zaG93KHN0 cnVjdCBzZXFfZmlsZSAqbSwgdm9pZCAqZGF0YSkKPiA+ICt7Cj4gPiArCXN0cnVjdCBkcm1fY29u bmVjdG9yICpjb25uZWN0b3IgPSBtLT5wcml2YXRlOwo+ID4gKwlzdHJ1Y3QgaW50ZWxfZHAgKmlu dGVsX2RwID0KPiA+ICsJCWVuY190b19pbnRlbF9kcCgmaW50ZWxfYXR0YWNoZWRfZW5jb2Rlcihj b25uZWN0b3IpLT5iYXNlKTsKPiA+ICsJdTggdmFsOwo+ID4gKwlpbnQgcmV0Owo+ID4gKwo+ID4g KwlyZXQgPSBkcm1fZHBfZHBjZF9yZWFkYigmaW50ZWxfZHAtPmF1eCwKPiA+ICsJCQkJaW50ZWxf ZHAtPmRlYnVnZnNfZHBjZF9hZGRyLCAmdmFsKTsKPiA+ICsJaWYgKHJldCA8IDApCj4gPiArCQly ZXR1cm4gcmV0Owo+ID4gKwo+ID4gKwlzZXFfcHJpbnRmKG0sICIweCV4XG4iLCB2YWwpOwo+ID4g KwlyZXR1cm4gMDsKPiA+ICt9Cj4gPiArCj4gPiArc3RhdGljIGludCBpOTE1X2RwY2RfdmFsX29w ZW4oc3RydWN0IGlub2RlICppbm9kZSwgc3RydWN0IGZpbGUgKmZpbGUpCj4gPiArewo+ID4gKwly ZXR1cm4gc2luZ2xlX29wZW4oZmlsZSwgaTkxNV9kcGNkX3ZhbF9zaG93LCBpbm9kZS0+aV9wcml2 YXRlKTsKPiA+ICt9Cj4gPiArCj4gPiArc3RhdGljIGNvbnN0IHN0cnVjdCBmaWxlX29wZXJhdGlv bnMgaTkxNV9kcGNkX3ZhbF9mb3BzID0gewo+ID4gKwkub3duZXIgPSBUSElTX01PRFVMRSwKPiA+ ICsJLm9wZW4gPSBpOTE1X2RwY2RfdmFsX29wZW4sCj4gPiArCS5yZWFkID0gc2VxX3JlYWQsCj4g PiArCS5sbHNlZWsgPSBzZXFfbHNlZWssCj4gPiArCS5yZWxlYXNlID0gc2luZ2xlX3JlbGVhc2Us Cj4gPiArfTsKPiA+ICsKPiA+ICAvKioKPiA+ICAgKiBpOTE1X2RlYnVnZnNfY29ubmVjdG9yX2Fk ZCAtIGFkZCBpOTE1IHNwZWNpZmljIGNvbm5lY3RvciBkZWJ1Z2ZzIGZpbGVzCj4gPiAgICogQGNv bm5lY3RvcjogcG9pbnRlciB0byBhIHJlZ2lzdGVyZWQgZHJtX2Nvbm5lY3Rvcgo+ID4gQEAgLTQ4 ODMsOSArNDk2NCwxNCBAQCBpbnQgaTkxNV9kZWJ1Z2ZzX2Nvbm5lY3Rvcl9hZGQoc3RydWN0IGRy bV9jb25uZWN0b3IgKmNvbm5lY3RvcikKPiA+ICAJCXJldHVybiAtRU5PREVWOwo+ID4gIAo+ID4g IAlpZiAoY29ubmVjdG9yLT5jb25uZWN0b3JfdHlwZSA9PSBEUk1fTU9ERV9DT05ORUNUT1JfRGlz cGxheVBvcnQgfHwKPiA+IC0JICAgIGNvbm5lY3Rvci0+Y29ubmVjdG9yX3R5cGUgPT0gRFJNX01P REVfQ09OTkVDVE9SX2VEUCkKPiA+ICsJICAgIGNvbm5lY3Rvci0+Y29ubmVjdG9yX3R5cGUgPT0g RFJNX01PREVfQ09OTkVDVE9SX2VEUCkgewo+ID4gIAkJZGVidWdmc19jcmVhdGVfZmlsZSgiaTkx NV9kcGNkIiwgU19JUlVHTywgcm9vdCwgY29ubmVjdG9yLAo+ID4gIAkJCQkgICAgJmk5MTVfZHBj ZF9mb3BzKTsKPiA+ICsJCWRlYnVnZnNfY3JlYXRlX2ZpbGUoImk5MTVfZHBjZF9hZGRyIiwgU19J UlVHTyB8IFNfSVdVU1IsCj4gPiArCQkJCXJvb3QsIGNvbm5lY3RvciwgJmk5MTVfZHBjZF9hZGRy X2ZvcHMpOwo+ID4gKwkJZGVidWdmc19jcmVhdGVfZmlsZSgiaTkxNV9kcGNkX3ZhbCIsIFNfSVJV R08sIHJvb3QsCj4gPiArCQkJCWNvbm5lY3RvciwgJmk5MTVfZHBjZF92YWxfZm9wcyk7Cj4gPiAr CX0KPiA+ICAKPiA+ICAJcmV0dXJuIDA7Cj4gPiAgfQo+ID4gZGlmZiAtLWdpdCBhL2RyaXZlcnMv Z3B1L2RybS9pOTE1L2ludGVsX2Rydi5oIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50ZWxfZHJ2 LmgKPiA+IGluZGV4IDQ3OTliMTEuLjA1OTRiYWEgMTAwNjQ0Cj4gPiAtLS0gYS9kcml2ZXJzL2dw dS9kcm0vaTkxNS9pbnRlbF9kcnYuaAo+ID4gKysrIGIvZHJpdmVycy9ncHUvZHJtL2k5MTUvaW50 ZWxfZHJ2LmgKPiA+IEBAIC02NDIsNiArNjQyLDcgQEAgc3RydWN0IGludGVsX2RwIHsKPiA+ICAJ dW5zaWduZWQgbG9uZyBsYXN0X3Bvd2VyX2N5Y2xlOwo+ID4gIAl1bnNpZ25lZCBsb25nIGxhc3Rf cG93ZXJfb247Cj4gPiAgCXVuc2lnbmVkIGxvbmcgbGFzdF9iYWNrbGlnaHRfb2ZmOwo+ID4gKwl1 bnNpZ25lZCBpbnQgZGVidWdmc19kcGNkX2FkZHI7Cj4gPiAgCj4gPiAgCXN0cnVjdCBub3RpZmll cl9ibG9jayBlZHBfbm90aWZpZXI7Cj4gPiAgCj4gPiAtLSAKPiA+IDEuOS4xCj4gPgo+IAo+IC0t IAo+IEphbmkgTmlrdWxhLCBJbnRlbCBPcGVuIFNvdXJjZSBUZWNobm9sb2d5IENlbnRlcgo+IF9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCj4gSW50ZWwtZ2Z4 IG1haWxpbmcgbGlzdAo+IEludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKPiBodHRwOi8v bGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4CgotLSAKVmls bGUgU3lyasOkbMOkCkludGVsIE9UQwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVl ZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZv L2ludGVsLWdmeAo=