From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?St=C3=A9phane_Marchesin?= Subject: Re: KMS backlight ABI proposition Date: Thu, 23 Feb 2017 09:31:47 -0800 Message-ID: References: <4b17ba08-39f3-57dd-5aad-d37d844b02c6@linux.intel.com> <8760k1i9kz.fsf@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-yw0-x229.google.com (mail-yw0-x229.google.com [IPv6:2607:f8b0:4002:c05::229]) by gabe.freedesktop.org (Postfix) with ESMTPS id 899B36EABA for ; Thu, 23 Feb 2017 17:32:29 +0000 (UTC) Received: by mail-yw0-x229.google.com with SMTP id p77so20054037ywg.1 for ; Thu, 23 Feb 2017 09:32:29 -0800 (PST) In-Reply-To: <8760k1i9kz.fsf@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Jani Nikula Cc: Hans de Goede , =?UTF-8?B?TWFydGluIEdyw6TDn2xpbg==?= , "dri-devel@lists.freedesktop.org" List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCBGZWIgMjMsIDIwMTcgYXQgMTI6NDAgQU0sIEphbmkgTmlrdWxhCjxqYW5pLm5pa3Vs YUBsaW51eC5pbnRlbC5jb20+IHdyb3RlOgo+IE9uIFdlZCwgMjIgRmViIDIwMTcsIFN0w6lwaGFu ZSBNYXJjaGVzaW4gPHN0ZXBoYW5lLm1hcmNoZXNpbkBnbWFpbC5jb20+IHdyb3RlOgo+PiBPbiBG cmksIEZlYiAxNywgMjAxNyBhdCA0OjU4IEFNLCBNYXJ0aW4gUGVyZXMKPj4gPG1hcnRpbi5wZXJl c0BsaW51eC5pbnRlbC5jb20+IHdyb3RlOgo+Pj4gSWYgdGhlIEtNUyBwcm9wZXJ0eSBleHBvc2Vz IGEgZml4ZWQgbnVtYmVyIG9mIHN0ZXBzIChzYXkgMTAwKSwgaXQgYmVjb21lcwo+Pj4gZWFzeSBm b3IgdGhlIHVzZXJzcGFjZSB0byBleHByZXNzIHRoZSB3YW50ZWQgYnJpZ2h0bmVzcy4gSG93ZXZl ciwgb24gZHJpdmVycwo+Pj4gZXhwb3NpbmcgbGVzcyB0aGFuIHRoZXNlIDEwMCBzdGVwcywgd2Ug Y2Fubm90IGd1YXJhbnRlZSB0aGF0IGFueSBjaGFuZ2UgaW4KPj4+IHRoZSB2YWx1ZSB3aWxsIHBy b2R1Y2UgYW55IGNoYW5nZS4gSWYgdGhlcmUgaXMgb25seSBvbmUgcG9zc2libGUgdmFsdWUgKG9u Cj4+PiBvciBvZmYpLCB0aGUgdXNlciBtYXkgYmUgdHJ5aW5nIHRoZSBjaGFuZ2UgdGhlIGJyaWdo dG5lc3MsIGEgR1VJIHdvdWxkIHNob3cKPj4+IHdoYXQgaXMgdGhlIGV4cGVjdGVkIGJhY2tsaWdo dCBzdGF0ZSwgYnV0IG5vIGNoYW5nZSBpbiB0aGUgbHVtaW5hbmNlIHdvdWxkCj4+PiBiZSBzZWVu LCB3aGljaCBpcyBwcmV0dHkgYmFkLgo+Pgo+PiBZZXMsIEkgZG9uJ3QgdGhpbmsgd2Ugd2FudCB0 byBub3JtYWxpemUgYW55dGhpbmcgaGVyZS4gSXQgd291bGQKPj4gZXNzZW50aWFsbHkgYmUgaGlk aW5nIGZ1bmN0aW9uYWxpdHkgZnJvbSB1c2VyIHNwYWNlLCB3aGljaCB0aGVuIGNhbid0Cj4+IGV4 cG9zZSBpdCBpbiB0aGUgdXNlciBpbnRlcmZhY2UuIEFzIHlvdSBzYXksIGlmIHRoZSBiYWNrbGln aHQgc2xpZGVyCj4+IG1vdmVzLCBidXQgdGhlIGJhY2tsaWdodCBsZXZlbCBkaWRuJ3QgY2hhbmdl LCB0aGF0J3Mgd2VpcmQuIE9uIHRoZQo+PiBvdGhlciBoYW5kIGlmIHVzZXIgc3BhY2Uga25vd3Mg dGhlIG51bWJlciBvZiBsZXZlbHMgaXQgY2FuIGdpdmUgeW91IGEKPj4gY29uc2lzdGVudCBzbGlk ZXIsIGFuZCBub3JtYWxpemluZyBpbiB1c2VyIHNwYWNlIGlzIG5vdCB0aGF0IGhhcmQKPj4gKHRo YXQncyBob3cgdGhpbmdzIGN1cnJlbnRseSB3b3JrIGFmdGVyIGFsbCwgc28gcGVvcGxlIHNob3Vs ZCBiZSB1c2VkCj4+IHRvIGl0KS4KPgo+IEkgbGlzdGVkIHNvbWUgb2YgdGhlIGJlbmVmaXRzIG9m IG5vcm1hbGl6aW5nIChvciByZS1yYW5naW5nKSBpbgo+IFsxXS4gQ29udmVyc2VseSwgSSBoYXZl bid0IHNlZW4gZ29vZCBhbnN3ZXJzIG9uIGhvdyB0byBncmFjZWZ1bGx5IGhhbmRsZQo+IHRoZSBi cmlnaHRuZXNzIHJhbmdlIGNoYW5naW5nIG9uIHRoZSBmbHkuIFRoYXQgaXMgd2hhdCBub3Qgbm9y bWFsaXppbmcKPiB3b3VsZCBtZWFuLiBJIGRvbid0IHRoaW5rIHRoZSBjdXJyZW50IHByb3BlcnR5 IGltcGxlbWVudGF0aW9uIGV2ZW4KPiBhbGxvd3MgY2hhbmdpbmcgdGhlIHJhbmdlLiBBbmQgdGhl biB0aGVyZSdkIGhhdmUgdG8gYmUgYSB3YXkgdG8gdGVsbCB0aGUKPiB1c2Vyc3BhY2UgdGhhdCB0 aGUgcmFuZ2UgaGFzIGNoYW5nZWQuCgoKTGV0IG1lIHJlcGx5IHRvIHlvdXIgcG9pbnRzOgotICJB bmQgdGhlIHVzZXJzcGFjZSB3aWxsIG9ubHkgdXNlIG1heWJlIHRlbiBzdGVwcy4iIFRoYXQgaXNu J3QgdHJ1ZSwKd2UgdXNlIGFsbCB0aGUgc3RlcHMgdGhhdCBhcmUgYXZhaWxhYmxlIHRvIGRvIHNt b290aCB0cmFuc2l0aW9ucyBpbgpDaHJvbWUgT1MuCi0gIlNvbWUgUFdNIGJhc2VkIGJhY2tsaWdo dCBhbGxvdyBhZGp1c3RpbmcgdGhlIFBXTSBtb2R1bGF0aW9uCmZyZXF1ZW5jeS4iIHlvdSBkb24n dCBuZWVkIGEgbW90aXZhdGlvbiBmb3IgKndoeSogSSB3b3VsZCB3YW50IHRvCmNoYW5nZSB0aGUg bW9kIGZyZXEgb24gdGhlIGZseSwgYWN0dWFsbHkgaW4gbXkgZXhwZXJpZW5jZSB5b3UKc2hvdWxk bid0IHNpbmNlIHRoaXMgY2FuIGxlYWQgdG8gZmxpY2tlcnkgYmFja2xpZ2h0cy4KLSAiVGhlIG1h eCBtaWdodCBjaGFuZ2UiIGFnYWluIHlvdSBkb24ndCBzYXkgd2h5IGV4Y2VwdCB0aGF0IHlvdSB3 YW50CnRvIGNoYW5nZSB0aGUgbW9kIGZyZXEuIEJhc2ljYWxseSBwb2ludCAzIGlzIGxpa2UgcG9p bnQgMi4KCgo+Cj4gSW4gdGhlIHNhbWUgbWVzc2FnZSwgSSBtZW50aW9uZWQgdGhlIGlkZWEgb2Yg cHJvdmlkaW5nIGFuIEFQSSB0bwo+IGluY3JlYXNlL2RlY3JlYXNlIGJyaWdodG5lc3MuIFRoYXQg bWlnaHQgYmUgbXVjaCBlYXNpZXIgdG8gaW1wbGVtZW50Cj4gdGhhbiBhbGxvd2luZyB0aGUgcHJv cGVydHkgcmFuZ2UgY2hhbmdlLgo+Cj4gWzFdIGh0dHA6Ly9tYXJjLmluZm8vP2k9ODdtdmRlaTd1 Zy5mc2ZAaW50ZWwuY29tCj4KPj4gWWVzIHRoZSBhYmlsaXR5IHRvIHR1cm4gb2ZmIHRoZSBiYWNr bGlnaHQgaXMgaW1wb3J0YW50LiBTb21lCj4+IGJhY2tsaWdodHMgYXJlIG5vdCBzdGFibGUgYXQg bG93IGxldmVscywgc28gdGhleSBkb24ndCBleHBvc2UgdGhlc2UKPj4gbG93IGxldmVscyBhbmQg ZWZmZWN0aXZlbHkgbGV2ZWwgMCBpcyBub3Qgb2ZmIChpdCBpcyB0aGUgbG93ZXN0IGxldmVsCj4+ IHdoaWNoIHdvcmtzKS4gU28gSSBndWVzcyB0aGUgcXVlc3Rpb24gaXMgaG93IHNob3VsZCB0aGF0 IG5vbi1saW5lYXJpdHkKPj4gYmUgZXhwb3NlZCB2ZXJzdXMgdGhlIGFiaWxpdHkgdG8gdHVybiBp dCBvZmYgY29tcGxldGVseS4KPgo+IFlvdSBmYWlsIHRvIHNheSAqd2h5KiB0aGUgYWJpbGl0eSB0 byB0dXJuIG9mZiB0aGUgYmFja2xpZ2h0IGlzCj4gaW1wb3J0YW50LiBJJ3ZlIHNlZW4gaXQgdXNl ZCBhcyBhIGtpbmQgb2YgImxpZ2h0IERQTVMiIHRoYXQgY2FuIGJlIGRvbmUKPiB1c2luZyB0aGUg c3lzZnMgaW50ZXJmYWNlLCBidXQgSSB0aGluayB0aGF0J3MgYSBoYWNrLCByZWFsbHkuIEhlcmUs Cj4gd2hvZXZlciBjaGFuZ2VzIHRoZSBiYWNrbGlnaHQgd291bGQgYmUgZG9pbmcgaXQgdXNpbmcg dGhlIERSTSBBUElzCj4gYW55d2F5LCBzbyBpdCBjb3VsZCBkbyBhY3R1YWwgRFBNUyBhbnl3YXku IEFuZCwgb2YgY291cnNlLCBub3QgYWxsCj4gYmFja2xpZ2h0IGhhcmR3YXJlIGlzIGFibGUgdG8g c3dpdGNoIG9mZiB0aGUgYmFja2xpZ2h0LCBhbmQgbm90IGFsbAo+IGRyaXZlcnMgd2lsbCBiZSBh YmxlIHRvIHNheSB3aGV0aGVyIDAgaXMgb2ZmIG9yIG5vdC4KClR1cm5pbmcgdGhlIG9uL29mZiB0 aGUgYmFja2xpZ2h0IGlzIG11Y2ggcXVpY2tlciB0aGFuIHR1cm5pbmcgb24vb2ZmCnRoZSBkaXNw bGF5IHRocm91Z2ggRFBNUy4gU28gb25lIHRoaW5nIHdlIGRvIGlzIHVzZSB0aGF0IHRvIHR1cm4g YQpzY3JlZW4gb2ZmL29uIHZlcnkgcXVpY2tseS4KCgoKPgo+Pj4gVGhlIGJhY2tsaWdodF9jdXJy ZW50IGludGVyZmFjZSBpbiB0aGUgYmFja2xpZ2h0IGRldmljZXMgaXMgbWVhbnQgdG8gZXhwb3Nl Cj4+PiB0aGUgY3VycmVudGx5LXVzZWQgYmFja2xpZ2h0IHZhbHVlLCByZWdhcmRsZXNzIG9mIHRo ZSB3YW50ZWQgdmFsdWUgdGhhdAo+Pj4gc2hvdWxkIGJlIHVzZWQgd2hlbiB0aGUgYmFja2xpZ2h0 IGlzIG5vdCBvZmYuCj4+Pgo+Pj4gTXkgY3VycmVudCBzdGFuY2Ugb24gdGhpcyBpcyB0aGF0IHRo aXMgc2hvdWxkIG5vdCBiZSBuZWVkZWQuIFRoZSB1c2Vyc3BhY2UKPj4+IHNob3VsZCBkZXNjcmli ZSB0aGUgaW50ZW50IG9mIHRoZSB1c2VyICh3YW50ZWQgYmFja2xpZ2h0IGxldmVsKSBhbmQgdHJ1 c3QKPj4+IHRoZSBLTVMgcHJvcGVydHkgdG8gdHVybiBvZmYgdGhlIGJhY2tsaWdodCB3aGVuIGVu dGVyaW5nIERQTVMuCj4+Cj4+IEFyZSB3ZSBzYXlpbmcgdGhhdCB3ZSBhcmUgcHV0dGluZyB0aGUg a2VybmVsIGluIGNoYXJnZSBvZiAgZGlzcGxheSB2cwo+PiBiYWNrbGlnaHQgc2VxdWVuY2luZz8g Q3VycmVudGx5IG9uIHNvbWUgQVJNIGJvYXJkcyB3aXRoIHNlcGFyYXRlIHB3bQo+PiBiYWNrbGln aHQgZHJpdmVycyB0aGF0J3Mgbm90IHRoZSBjYXNlLiBEb24ndCBnZXQgbWUgd3JvbmcsIEkgdGhp bmsgdGhlCj4+IGtlcm5lbCBzaG91bGQgYmUgaW4gY2hhcmdlIG9mIGVuZm9yY2luZyBzZXF1ZW5j aW5nIGJlY2F1c2Ugb3RoZXJ3aXNlCj4+IHVzZXIgc3BhY2UgY2FuIGRhbWFnZSBoYXJkd2FyZSwg SSdtIGp1c3QgcG9pbnRpbmcgb3V0IHRoYXQgcmlnaHQgbm93Cj4+IGl0IGlzbid0IHRoZSBjYXNl Lgo+Cj4gV2hlbmV2ZXIgdGhlIGtlcm5lbCBpcyBhYmxlIHRvIGVuZm9yY2UgdGhlIHNlcXVlbmNp bmcsIGl0IHNob3VsZC4gSQoKCkl0IHByb2JhYmx5IHNob3VsZG4ndCBiZSBqdXN0ICJpdCBzaG91 bGQiLiBJZiB1c2VyIHNwYWNlIGNhbiBkYW1hZ2UKdGhlIGh3LCB0aGVuIHRoZSBrZXJuZWwgaXMg YnJva2VuLgoKU3TDqXBoYW5lCgoKPiBiZWxpZXZlIHRoaXMgaXMgdGhlIGNhc2UgZm9yIG1vc3Qg bmF0aXZlIGJhY2tsaWdodCBpbXBsZW1lbnRhdGlvbnMuIEFuZAo+IGluIHRoZXNlIGNhc2VzIHRo ZSBiYWNrbGlnaHQgb24vb2ZmIHRvZ2dsaW5nIHdvdWxkIHJlYWxseSBoYXZlIHRvIGJlIGEKPiBz dWJzdGF0ZSBvZiBlbmFibGVkIGRpc3BsYXk7IGNhbid0IGVuYWJsZSBiYWNrbGlnaHQgd2l0aG91 dCBkaXNwbGF5Cj4gZW5hYmxlZC4KPgo+IEJSLAo+IEphbmkuCj4KPgo+IC0tCj4gSmFuaSBOaWt1 bGEsIEludGVsIE9wZW4gU291cmNlIFRlY2hub2xvZ3kgQ2VudGVyCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJp LWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo=