From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Message-ID: <1520308623.33502.13.camel@aosc.io> Subject: Re: Question about a quirky (DesignWare) PCIe RC in Allwinner H6 From: Icenowy Zheng To: Bjorn Helgaas Date: Tue, 06 Mar 2018 11:57:03 +0800 In-Reply-To: <20180305214718.GC255556@bhelgaas-glaptop.roam.corp.google.com> References: <1520261458.33502.10.camel@aosc.io> <20180305214718.GC255556@bhelgaas-glaptop.roam.corp.google.com> Mime-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Joao Pinto , Maxime Ripard , linux-pci@vger.kernel.org, linux-sunxi@googlegroups.com, Chen-Yu Tsai , Lorenzo Pieralisi , Jingoo Han , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: 5ZyoIDIwMTgtMDMtMDXkuIDnmoQgMTU6NDcgLTA2MDDvvIxCam9ybiBIZWxnYWFz5YaZ6YGT77ya Cj4gT24gTW9uLCBNYXIgMDUsIDIwMTggYXQgMTA6NTA6NThQTSArMDgwMCwgSWNlbm93eSBaaGVu ZyB3cm90ZToKPiA+IEhpIGV2ZXJ5b25lLAo+ID4gCj4gPiBJJ20gdHJ5aW5nIHRvIGltcGxlbWVu dCBhIGRyaXZlciBmb3IgdGhlIHF1aXJreSAoRFcpIFBDSWUgUkMgaW4gdGhlCj4gPiBBbGx3aW5u ZXIgSDYgU29DLgo+ID4gCj4gPiBUaGUgcXVpcmsgaXMgdGhhdCBvbmx5IHRoZSAiZGJpIiBzcGFj ZSBpcyBhbHdheXMgbWFwcGVkLCBidXQgYXQgdGhlCj4gPiBzYW1lIHRpbWUgb25seSA2NEtpQiBv ZiBvdGhlciBzcGFjZXMgKGNvbmZpZywgZG93bnN0cmVhbSBJTyBhbmQKPiA+IG5vbi0KPiA+IHBy ZWZldGNoYWJsZSBtZW1vcnkpIGFyZSBhY2Nlc3NpYmxlLiBUbyBhY2Nlc3MgYSBjZXJ0YWluIGFk ZHJlc3MKPiA+IHRoZQo+ID4gaGlnaCAxNi1iaXQgb2YgdGhlIGFkZHJlc3MgKGFsbCBidXMgYWRk cmVzc2VzIGluIEg2IFNvQyBhcmUgMzItYml0Cj4gPiBkZXNwaXRlIHRoZSBDUFUgaXMgNjQtYml0 KSBuZWVkcyB0byBiZSB3cml0dGVuIGludG8gdGhlCj4gPiBQQ0lFX0FERFJfUEFHRV9DRkcgcmVn aXN0ZXIgKGEgdmVuZG9yLWRlZmluZWQgcmVnaXN0ZXIgaW4gREJJCj4gPiBzcGFjZSkuCj4gPiBT byB0aGUgYWNjZXNzIHRvIHRoZXNlIHNwYWNlcyBjYW5ub3QgYmUgcHJvY2Vzc2VkIGNvcnJlY3Rs eSB3aXRoCj4gPiBqdXN0Cj4gPiByZWFkbC93cml0ZWwsIGFzIHRoZSBleGlzdGluZyBjb2RlIGRv ZXMuCj4gPiAKPiA+IElzIGl0IHBvc3NpYmxlIHRvIHdvcmthcm91bmQgdGhpcyBpbiB0aGUgUENJ IHN1YnN5c3RlbSBvZiBMaW51eD8KPiA+IAo+ID4gKEkgaGF2ZSB0aG91Z2h0IGEgd29ya2Fyb3Vu ZCB0aGF0IG9ubHkgbWFwcyB0aGUgY3VycmVudCBhY2Nlc3NpYmxlCj4gPiA2NEtpQiB3aXRoIHRo ZSBNTVUsIGFuZCB3aGVuIGFjY2Vzc2luZyB0aGUgbm9uLWFjY2Vzc2libGUgcGFydCwKPiA+IGNh dGNoCj4gPiB0aGUgcGFnZSBmYXVsdCBhbmQgcmUtc2V0dXAgdGhlIG1hcCB0byB0aGUgbmV3IDY0 S2lCIHBhZ2UuIEJ1dAo+ID4gc3VyZWx5Cj4gPiBpdCB3aWxsIGtpbGwgdGhlIHBlcmZvcm1hbmNl LikKPiAKPiBJZiB5b3Ugb25seSBuZWVkIHRvIHdyaXRlIHRvIFBDSUVfQUREUl9QQUdFX0NGRyBm b3IgKmNvbmZpZyoKPiBhY2Nlc3NlcywKPiB0aGlzIHNob3VsZCBiZSBlYXN5LiAgQWxsIGNvbmZp ZyBhY2Nlc3NlcyBnbyB0aHJvdWdoIHdyYXBwZXJzCj4gKHBjaV9yZWFkX2NvbmZpZ193b3JkKCks IGV0YykgYW5kIHNldmVyYWwgaG9zdCBicmlkZ2UgZHJpdmVycyBoYXZlIHRvCj4gdXBkYXRlIGEg cmVnaXN0ZXIgd2l0aCBwYXJ0cyBvZiB0aGUgY29uZmlnIGFkZHJlc3MsIGUuZy4sCj4gYWR2a19w Y2llX3JkX2NvbmYoKSwgbXZlYnVfcGNpZV9od19yZF9jb25mKCkuCj4gCj4gSXQgc291bmRzIGxp a2UgeW91IGFsc28gbmVlZCB0byB1cGRhdGUgUENJRV9BRERSX1BBR0VfQ0ZHIGZvciBJL08KPiBw b3J0Cj4gYWNjZXNzZXMuICBJL08gcG9ydCBhY2Nlc3NlcyBkbyBnbyB0aHJvdWdoIGEgd3JhcHBl ciAoaW5iKCksIGV0YyksIHNvCj4gaXQgbWlnaHQgYmUgcG9zc2libGUgaW4gcHJpbmNpcGxlIHRv IGludGVyY2VwdCB0aGVzZSwgYWx0aG91Z2ggbXVjaAo+IG1vcmUgZGlmZmljdWx0IHRoYW4gY29u ZmlnIGFjY2Vzc2VzLCBiZWNhdXNlIHRoZSBjb25maWcgYWNjZXNzZXMgYXJlCj4gYWxyZWFkeSBz ZXQgdXAgd2l0aCBwZXItaG9zdCBicmlkZ2UgaG9va3MsIHdoaWxlIHRoZSBJL08gcG9ydAo+IGFj Y2Vzc29ycyBhcmUgbW9zdGx5IHBlci1hcmNoLgo+IAo+IEJ1dCBpZiB5b3UgaGF2ZSB0byB1cGRh dGUgUENJRV9BRERSX1BBR0VfQ0ZHIGZvciBtZW1vcnkgYWNjZXNzZXMsCj4gdGhhdCdzIHJlYWxs eSBhIHByb2JsZW0gYmVjYXVzZSBkcml2ZXJzIGFyZSBhbGxvd2VkIHRvIGVzc2VudGlhbGx5Cj4g cmVhZCBhIG1lbW9yeSBCQVIsIGNvbnZlcnQgdGhhdCBidXMgYWRkcmVzcyB0byBhIENQVSBwaHlz aWNhbCBtZW1vcnkKPiBhZGRyZXNzLCBpb3JlbWFwKCkgaXQsIHRoZW4gZGlyZWN0bHkgYWNjZXNz IHRoZSBQQ0llIG1lbW9yeSB3aXRoCj4gbG9hZHMKPiBhbmQgc3RvcmVzLgoKVW5mb3J0dW5hdGVs eSB0aGlzIGlzIHRoZSBjYXNlLiBBbGwgYWJvdmUgKGNvbmZpZywgSU8sIG1lbW9yeSkgbmVlZHMK UENJRV9BRERSX1BBR0VfQ0ZHIHVwZGF0ZS4KCj4gCj4gQmpvcm4KCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBs aXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5m cmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK