From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm/radeon: Retry DDC probing on DVI on failure if we got an HPD interrupt Date: Mon, 23 Nov 2015 09:55:06 +0100 Message-ID: <20151123085506.GW17050@phenom.ffwll.local> References: <1448034740-30193-1-git-send-email-cpaul@redhat.com> <56507E0F.7030009@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-wm0-f48.google.com (mail-wm0-f48.google.com [74.125.82.48]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1AE4A6E474 for ; Mon, 23 Nov 2015 00:55:12 -0800 (PST) Received: by wmec201 with SMTP id c201so95082320wme.1 for ; Mon, 23 Nov 2015 00:55:10 -0800 (PST) Content-Disposition: inline In-Reply-To: <56507E0F.7030009@amd.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Christian =?iso-8859-1?Q?K=F6nig?= Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jerome Glisse , Benjamin Tissoires , Alex Deucher , cpaul@redhat.com List-Id: dri-devel@lists.freedesktop.org T24gU2F0LCBOb3YgMjEsIDIwMTUgYXQgMDM6MjI6MDdQTSArMDEwMCwgQ2hyaXN0aWFuIEvDtm5p ZyB3cm90ZToKPiBPbiAyMC4xMS4yMDE1IDE2OjUyLCBjcGF1bEByZWRoYXQuY29tIHdyb3RlOgo+ ID5Gcm9tOiBTdGVwaGVuIENoYW5kbGVyIFBhdWwgPGNwYXVsQHJlZGhhdC5jb20+Cj4gPgo+ID5I UEQgc2lnbmFscyBvbiBEVkkgcG9ydHMgY2FuIGJlIGZpcmVkIG9mZiBiZWZvcmUgdGhlIHBpbnMg cmVxdWlyZWQgZm9yCj4gPkREQyBwcm9iaW5nIGFjdHVhbGx5IG1ha2UgY29udGFjdCwgZHVlIHRv IHRoZSBwaW5zIGZvciBIUEQgbWFraW5nCj4gPmNvbnRhY3QgZmlyc3QuIFRoaXMgcmVzdWx0cyBp biBhIEhQRCBzaWduYWwgYmVpbmcgYXNzZXJ0ZWQgYnV0IEREQwo+ID5wcm9iaW5nIGZhaWxpbmcs IHJlc3VsdGluZyBpbiBob3RwbHVnZ2luZyBvY2Nhc2lvbmFsbHkgZmFpbGluZy4KPiA+Cj4gPlRo aXMgaXMgc29tZXdoYXQgcmFyZSBvbiBtb3N0IGNhcmRzIChkZXBlbmRpbmcgb24gd2hhdCBhbmds ZSB5b3UgcGx1Zwo+ID50aGUgRFZJIGNvbm5lY3RvciBpbiksIGJ1dCBvbiBzb21lIGNhcmRzIGl0 IGhhcHBlbnMgY29uc3RhbnRseS4gVGhlCj4gPlJhZGVvbiBSNSBvbiB0aGUgbWFjaGluZSB1c2Vk IGZvciB0ZXN0aW5nIHRoaXMgcGF0Y2ggZm9yIGluc3RhbmNlLCBydW5zCj4gPmludG8gdGhpcyBp c3N1ZSBqdXN0IGFib3V0IGV2ZXJ5IHRpbWUgSSB0cnkgdG8gaG90cGx1ZyBhIERWSSBtb25pdG9y IGFuZAo+ID5hcyBhIHJlc3VsdCBob3RwbHVnZ2luZyBhbG1vc3QgbmV2ZXIgd29ya3MuCj4gPgo+ ID5SZXNjaGVkdWxpbmcgdGhlIGhvdHBsdWcgd29yayBmb3IgYSBzZWNvbmQgd2hlbiB3ZSBydW4g aW50byBhbiBIUEQKPiA+c2lnbmFsIHdpdGggYSBmYWlsaW5nIEREQyBwcm9iZSB1c3VhbGx5IGdp dmVzIGVub3VnaCB0aW1lIGZvciB0aGUgcmVzdAo+ID5vZiB0aGUgY29ubmVjdG9yJ3MgcGlucyB0 byBtYWtlIGNvbnRhY3QsIGFuZCBmaXhlcyB0aGlzIGlzc3VlLgo+ID4KPiA+U2lnbmVkLW9mZi1i eTogU3RlcGhlbiBDaGFuZGxlciBQYXVsIDxjcGF1bEByZWRoYXQuY29tPgo+IAo+IFllYWgsIHRo YXQncyBzb21ldGhpbmcgSSBhbHdheXMgd29uZGVyZWQgYSBhYm91dCBiaXQgYXMgd2VsbC4KPiAK PiBEZWJvdW5jaW5nIGlzIHNvbWV0aGluZyB2ZXJ5IGNvbW1vbiBkb25lIGluIGVsZWN0cm9uaWNz LCBidXQgYXMgZmFyIGFzIEkKPiBrbm93IHRoZSBIUEQgcGlucyBkb24ndCBuZWNlc3NhcnkgaGF2 ZSBhbiBSQyBjaXJjdWl0IHNvIHdlIG1pZ2h0IG5lZWQgdG8KPiBoYW5kbGUgdGhpcyBjYXNlIGlu IHNvZnR3YXJlIGhlcmUuCj4gCj4gQSBkZWxheSBvZiBzb21ldGhpbmcgYmV0d2VlbiAxMC0zMG1z IGJldHdlZW4gdGhlIGxhc3QgSFBEIGludGVycnVwdCBhbmQKPiBmdXJ0aGVyIHByb2Nlc3Npbmcg b2YgdGhlIHNpZ25hbCBkb2Vzbid0IHNvdW5kcyBsaWtlIHN1Y2ggYSBiYWQgaWRlYS4KPiAKPiBS ZXRyeWluZyBvbiB0aGUgb3RoZXIgaGFuZCBkb2Vzbid0IG5lY2Vzc2FyaWx5IGltcHJvdmUgdGhl IHNpdHVhdGlvbiBjYXVzZQo+IHRoZSBkZWxheSBpbnRyb2R1Y2VkIGJ5IHRoaXMgbWlnaHQgbm90 IGJlIGVub3VnaC4KPiAKPiBTbyBJIHdvdWxkIHJhdGhlciB2b3RlIGZvciBhIGZpeGVkIGRlbGF5 IGJldHdlZW4gYW4gSFBEIGludGVycnVwdCBhbmQKPiBhY3R1YWxseSBzdGFydGluZyB0byBwcm9j ZXNzIGFueXRoaW5nLgoKTWlnaHQgYmUgaW50ZXJlc3RpbmcgdG8gY29tcGFyZSB3aGF0IHdlIGRv IGluIGk5MTUgaW4gbGF0ZXN0IGtlcm5lbHM6CgotIGluIHRoZSBocGQgaGFuZGxlciB3ZSBjaGVj ayB0aGUgaHBkIHN0YXR1cyBiaXRzIGJlZm9yZSBwcm9iaW5nIHRoZSBlZGlkLgogIFRoaXMgd2ls bCB0YWtlIGNhcmUgb2Ygc2xvdyB1bnBsdWcgY2FzZSB3aGVyZSB3ZSBnZXQgdGhlIGhwZAogIGlu dGVycnVwdC9zdGF0dXMgY2hhbmdlLCBidXQgaTJjIGlzIHN0aWxsIHdvcmtpbmcuCgotIGJ1dCBi ZWNhdXNlIGNyYXAgc2NyZWVucyAob3Igd2hhdGV2ZXIgaXQgaXMpIGlmIGhwZCBpcyBfbm90XyBz ZXQgd2UKICByZXRlc3QgdGhlIHN0YXR1cyBmb3IgMzBtcyAoYW5kIGJhaWwgb3V0IGFzIHNvb24g YXMgaHBkIHN0YXR1cyBpcwogIGFzc2VydGVkKS4gVGhpcyBzZWVtcyB0byBiZSBlbm91Z2ggdGlt ZSB0byBzZXR0bGUgYWxsIHNjcmVlbnMuCgpOb3RlIHRoYXQgdGhpcyBpcyBpbiBpbnRlbF9oZG1p LmMgc2luY2UgbmF0aXZlIGR2aSBwb3J0cyBvbiBpbnRlbCBodyBhbHNvCmFsd2F5cyBzdXBwb3J0 ZWQgaGRtaSBmZWF0dXJlcy4gTm90IHN1cmUgd2hldGhlciB3ZSBjb3VsZCBleHRyYWN0IHRoaXMK aW50byBzb21lIGtpbmQgb2YgaGVscGVyIGFuZCBzaGFyZS4KLURhbmllbAoKCj4gCj4gUmVnYXJk cywKPiBDaHJpc3RpYW4uCj4gCj4gPi0tLQo+ID5TbyB0aGlzIG9uZSBoYXMga2luZCBvZiBiZWVu IGEgdG91Z2ggc2VsbCB3aXRoIEplcm9tZSwgbW9zdGx5IGJlY2F1c2UgaXQncwo+ID5zb21ld2hh dCBvZiBhIGhhY2suIFVuZm9ydHVuYXRlbHkgaG93ZXZlciBJJ3ZlIG1hbmFnZWQgdG8gZmluZCBt YWNoaW5lcyB3aGVyZQo+ID5EVkkgaG90cGx1Z2dpbmcgbGl0ZXJhbGx5IGRvZXNuJ3Qgd29yayB3 aXRob3V0IGEgcGF0Y2ggbGlrZSB0aGlzLiBXZSd2ZSBhbHJlYWR5Cj4gPnRyaWVkIGEgY291cGxl IG9mIHdheXMgb2YgaGFuZGxpbmcgdGhlIHNpdHVhdGlvbiBvZiByZXRyaWdnZXJpbmcgZGRjIHBy b2JlczoKPiA+Cj4gPiogVHJ5aW5nIHRoZSBEREMgcHJvYmUgaW4gdGhlIHJhZGVvbl9kdmlfZGV0 ZWN0KCkgZnVuY3Rpb24gbXVsdGlwbGUgdGltZXMuCj4gPiogVHJ5aW5nIHRvIHJlc2NoZWR1bGUg dGhlIGhvdHBsdWdfd29yayB0YXNrIHdoZW5ldmVyIEREQyBwcm9iaW5nIGZhaWxzIG9uIERWSQo+ ID4gICBidXQgd2UgZ290IGEgaHBkIHNpZ25hbCAodGhpcyBlbmRlZCB1cCBiZWluZyBhIG11Y2gg bW9yZSBjb21wbGljYXRlZCBwYXRjaAo+ID4gICB0aGVuIGFudGljaXBhdGVkKQo+ID4qIERvaW5n IHdoYXQgd2UgZG8gcmlnaHQgbm93LCB3aGljaCBpcyBqdXN0IHRyaWdnZXJpbmcgdXNlcnNwYWNl IHRvIHJlc2NhbiBhbGwKPiA+ICAgdGhlIHBvcnRzIHdoZW4gdGhlIGhwZCBzaWduYWwgaXMgYXNz ZXJ0ZWQgYnkgdGhlIERWSSBwb3J0IGJ1dCB0aGVyZSdzIG5vIEREQwo+ID4gICBwcm9iZSwgYW5k IHJlcGVhdGluZyB1bnRpbCBhdCBsZWFzdCBhIHNlY29uZCBwYXNzZXMuCj4gPgo+ID5BbGwgb2Yg dGhlc2UgYWN0dWFsbHkgd29yaywgYnV0IEkgZ3Vlc3MgaXQncyBhIHF1ZXN0aW9uIG9mIHdoaWNo IG9uZSBpcyBsZXNzIG9mCj4gPmEgaGFjay4gSWYgYW55b25lIGhlcmUgY2FuIHRoaW5rIG9mIGEg Y2xlYW5lciB3YXkgb2YgaGFuZGxpbmcgdGhpcyBmZWVsIGZyZWUgdG8KPiA+bGV0IG1lIGtub3cu Cj4gPgo+ID4gIGRyaXZlcnMvZ3B1L2RybS9yYWRlb24vcmFkZW9uLmggICAgICAgICAgICB8ICAz ICsrKwo+ID4gIGRyaXZlcnMvZ3B1L2RybS9yYWRlb24vcmFkZW9uX2Nvbm5lY3RvcnMuYyB8IDIw ICsrKysrKysrKysrKysrKysrLS0tCj4gPiAgZHJpdmVycy9ncHUvZHJtL3JhZGVvbi9yYWRlb25f aXJxX2ttcy5jICAgIHwgIDIgKysKPiA+ICAzIGZpbGVzIGNoYW5nZWQsIDIyIGluc2VydGlvbnMo KyksIDMgZGVsZXRpb25zKC0pCj4gPgo+ID5kaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL3Jh ZGVvbi9yYWRlb24uaCBiL2RyaXZlcnMvZ3B1L2RybS9yYWRlb24vcmFkZW9uLmgKPiA+aW5kZXgg YjZjYmQ4MS4uZDYzZjBmZSAxMDA2NDQKPiA+LS0tIGEvZHJpdmVycy9ncHUvZHJtL3JhZGVvbi9y YWRlb24uaAo+ID4rKysgYi9kcml2ZXJzL2dwdS9kcm0vcmFkZW9uL3JhZGVvbi5oCj4gPkBAIC0y NDYwLDYgKzI0NjAsOSBAQCBzdHJ1Y3QgcmFkZW9uX2RldmljZSB7Cj4gPiAgCS8qIGFtZGtmZCBp bnRlcmZhY2UgKi8KPiA+ICAJc3RydWN0IGtmZF9kZXYJCSprZmQ7Cj4gPisJLyogbGFzdCB0aW1l IHdlIHJlY2VpdmVkIGFuIGhwZCBzaWduYWwgKi8KPiA+Kwl1bnNpZ25lZCBsb25nIGhwZF90aW1l Owo+ID4rCj4gPiAgCXN0cnVjdCBtdXRleAltbl9sb2NrOwo+ID4gIAlERUNMQVJFX0hBU0hUQUJM RShtbl9oYXNoLCA3KTsKPiA+ICB9Owo+ID5kaWZmIC0tZ2l0IGEvZHJpdmVycy9ncHUvZHJtL3Jh ZGVvbi9yYWRlb25fY29ubmVjdG9ycy5jIGIvZHJpdmVycy9ncHUvZHJtL3JhZGVvbi9yYWRlb25f Y29ubmVjdG9ycy5jCj4gPmluZGV4IDVhMmNhZmIuLjRlZTk0NDAgMTAwNjQ0Cj4gPi0tLSBhL2Ry aXZlcnMvZ3B1L2RybS9yYWRlb24vcmFkZW9uX2Nvbm5lY3RvcnMuYwo+ID4rKysgYi9kcml2ZXJz L2dwdS9kcm0vcmFkZW9uL3JhZGVvbl9jb25uZWN0b3JzLmMKPiA+QEAgLTEyMjgsMTkgKzEyMjgs MzMgQEAgcmFkZW9uX2R2aV9kZXRlY3Qoc3RydWN0IGRybV9jb25uZWN0b3IgKmNvbm5lY3Rvciwg Ym9vbCBmb3JjZSkKPiA+ICAJY29uc3Qgc3RydWN0IGRybV9lbmNvZGVyX2hlbHBlcl9mdW5jcyAq ZW5jb2Rlcl9mdW5jczsKPiA+ICAJaW50IGksIHI7Cj4gPiAgCWVudW0gZHJtX2Nvbm5lY3Rvcl9z dGF0dXMgcmV0ID0gY29ubmVjdG9yX3N0YXR1c19kaXNjb25uZWN0ZWQ7Cj4gPi0JYm9vbCBkcmV0 ID0gZmFsc2UsIGJyb2tlbl9lZGlkID0gZmFsc2U7Cj4gPisJYm9vbCBkcmV0ID0gZmFsc2UsIGJy b2tlbl9lZGlkID0gZmFsc2UsIGhwZF91bmNoYW5nZWQ7Cj4gPiAgCXIgPSBwbV9ydW50aW1lX2dl dF9zeW5jKGNvbm5lY3Rvci0+ZGV2LT5kZXYpOwo+ID4gIAlpZiAociA8IDApCj4gPiAgCQlyZXR1 cm4gY29ubmVjdG9yX3N0YXR1c19kaXNjb25uZWN0ZWQ7Cj4gPi0JaWYgKCFmb3JjZSAmJiByYWRl b25fY2hlY2tfaHBkX3N0YXR1c191bmNoYW5nZWQoY29ubmVjdG9yKSkgewo+ID4rCWhwZF91bmNo YW5nZWQgPSByYWRlb25fY2hlY2tfaHBkX3N0YXR1c191bmNoYW5nZWQoY29ubmVjdG9yKTsKPiA+ KwlpZiAoIWZvcmNlICYmIGhwZF91bmNoYW5nZWQpIHsKPiA+ICAJCXJldCA9IGNvbm5lY3Rvci0+ c3RhdHVzOwo+ID4gIAkJZ290byBleGl0Owo+ID4gIAl9Cj4gPi0JaWYgKHJhZGVvbl9jb25uZWN0 b3ItPmRkY19idXMpCj4gPisJaWYgKHJhZGVvbl9jb25uZWN0b3ItPmRkY19idXMpIHsKPiA+ICAJ CWRyZXQgPSByYWRlb25fZGRjX3Byb2JlKHJhZGVvbl9jb25uZWN0b3IsIGZhbHNlKTsKPiA+Kwo+ ID4rCQkvKiBTb21ldGltZXMgdGhlIHBpbnMgcmVxdWlyZWQgZm9yIHRoZSBEREMgcHJvYmUgb24g RFZJCj4gPisJCSAqIGNvbm5lY3RvcnMgZG9uJ3QgbWFrZSBjb250YWN0IGF0IHRoZSBzYW1lIHRp bWUgdGhhdCB0aGUgb25lcwo+ID4rCQkgKiBmb3IgSFBEIGRvLiBJZiB0aGUgRERDIHByb2JlIGZh aWxzIGV2ZW4gdGhvdWdoIHdlIGhhZCBhbiBIUEQKPiA+KwkJICogc2lnbmFsLCBzaWduYWwgdXNl cnNwYWNlIHRvIHRyeSBhZ2FpbiAqLwo+ID4rCQlpZiAoIWRyZXQgJiYgIWhwZF91bmNoYW5nZWQg JiYKPiA+KwkJICAgIGNvbm5lY3Rvci0+c3RhdHVzICE9IGNvbm5lY3Rvcl9zdGF0dXNfY29ubmVj dGVkICYmCj4gPisJCSAgICB0aW1lX2JlZm9yZShqaWZmaWVzLCByZGV2LT5ocGRfdGltZSArIG1z ZWNzX3RvX2ppZmZpZXMoMTAwMCkpKSB7Cj4gPisJCQlEUk1fREVCVUdfS01TKCIlczogaHBkIGFz c2VydGVkIGJ1dCBkZGMgcHJvYmUgZmFpbGVkLCByZXRyeWluZ1xuIiwKPiA+KwkJCQkgICAgICBj b25uZWN0b3ItPm5hbWUpOwo+ID4rCQkJZHJtX3N5c2ZzX2hvdHBsdWdfZXZlbnQoZGV2KTsKPiA+ KwkJfQo+ID4rCX0KPiA+ICAJaWYgKGRyZXQpIHsKPiA+ICAJCXJhZGVvbl9jb25uZWN0b3ItPmRl dGVjdGVkX2J5X2xvYWQgPSBmYWxzZTsKPiA+ICAJCXJhZGVvbl9jb25uZWN0b3JfZnJlZV9lZGlk KGNvbm5lY3Rvcik7Cj4gPmRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vcmFkZW9uL3JhZGVv bl9pcnFfa21zLmMgYi9kcml2ZXJzL2dwdS9kcm0vcmFkZW9uL3JhZGVvbl9pcnFfa21zLmMKPiA+ aW5kZXggMTcxZDNlNC4uNTc5YzIyYyAxMDA2NDQKPiA+LS0tIGEvZHJpdmVycy9ncHUvZHJtL3Jh ZGVvbi9yYWRlb25faXJxX2ttcy5jCj4gPisrKyBiL2RyaXZlcnMvZ3B1L2RybS9yYWRlb24vcmFk ZW9uX2lycV9rbXMuYwo+ID5AQCAtNzksNiArNzksOCBAQCBzdGF0aWMgdm9pZCByYWRlb25faG90 cGx1Z193b3JrX2Z1bmMoc3RydWN0IHdvcmtfc3RydWN0ICp3b3JrKQo+ID4gIAlzdHJ1Y3QgZHJt X21vZGVfY29uZmlnICptb2RlX2NvbmZpZyA9ICZkZXYtPm1vZGVfY29uZmlnOwo+ID4gIAlzdHJ1 Y3QgZHJtX2Nvbm5lY3RvciAqY29ubmVjdG9yOwo+ID4rCXJkZXYtPmhwZF90aW1lID0gamlmZmll czsKPiA+Kwo+ID4gIAkvKiB3ZSBjYW4gcmFjZSBoZXJlIGF0IHN0YXJ0dXAsIHNvbWUgYm9hcmRz IHNlZW0gdG8gdHJpZ2dlcgo+ID4gIAkgKiBob3RwbHVnIGlycXMgd2hlbiB0aGV5IHNob3VsZG4n dC4gKi8KPiA+ICAJaWYgKCFyZGV2LT5tb2RlX2luZm8ubW9kZV9jb25maWdfaW5pdGlhbGl6ZWQp Cj4gCj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KPiBk cmktZGV2ZWwgbWFpbGluZyBsaXN0Cj4gZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwo+ IGh0dHA6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK Ci0tIApEYW5pZWwgVmV0dGVyClNvZnR3YXJlIEVuZ2luZWVyLCBJbnRlbCBDb3Jwb3JhdGlvbgpo dHRwOi8vYmxvZy5mZndsbC5jaApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVz a3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2Ry aS1kZXZlbAo=