From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Brezillon Subject: Re: [PATCH RFC 14/19] drm/bridge: Add the necessary bits to support bus format negotiation Date: Thu, 22 Aug 2019 12:09:23 +0200 Message-ID: <20190822120923.6b18e6dd@collabora.com> References: <20190808151150.16336-1-boris.brezillon@collabora.com> <20190808151150.16336-15-boris.brezillon@collabora.com> <20190822005556.GB16790@pendragon.ideasonboard.com> <20190822094834.382a54a8@collabora.com> <3d5fb77f-7775-c01c-212c-dbfc7a9728d8@baylibre.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id B60EE6E9E5 for ; Thu, 22 Aug 2019 10:09:28 +0000 (UTC) In-Reply-To: <3d5fb77f-7775-c01c-212c-dbfc7a9728d8@baylibre.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Neil Armstrong Cc: Jernej Skrabec , Jonas Karlman , Seung-Woo Kim , dri-devel@lists.freedesktop.org, Kyungmin Park , Thierry Reding , Chris Healy , kernel@collabora.com, Sam Ravnborg , Laurent Pinchart List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCAyMiBBdWcgMjAxOSAxMToyOTo0MCArMDIwMApOZWlsIEFybXN0cm9uZyA8bmFybXN0 cm9uZ0BiYXlsaWJyZS5jb20+IHdyb3RlOgoKPiA+Pj4gKy8qKgo+ID4+PiArICogc3RydWN0IGRy bV9idXNfY2FwcyAtIGJ1cyBjYXBhYmlsaXRpZXMKPiA+Pj4gKyAqIEBzdXBwb3J0ZWRfZm10czog YXJyYXkgb2YgTUVESUFfQlVTX0ZNVF8gZm9ybWF0cwo+ID4+PiArICogQG51bV9zdXBwb3J0ZWRf Zm10czogc2l6ZSBvZiB0aGUgc3VwcG9ydGVkX2ZtdHMgYXJyYXkKPiA+Pj4gKyAqCj4gPj4+ICsg KiBVc2VkIGJ5IHRoZSBjb3JlIHRvIG5lZ290aWF0ZSB0aGUgYnVzIGZvcm1hdCBhdCBydW50aW1l Lgo+ID4+PiArICovCj4gPj4+ICtzdHJ1Y3QgZHJtX2J1c19jYXBzIHsKPiA+Pj4gKwljb25zdCB1 MzIgKnN1cHBvcnRlZF9mbXRzOwo+ID4+PiArCXVuc2lnbmVkIGludCBudW1fc3VwcG9ydGVkX2Zt dHM7Cj4gPj4+ICt9Owo+ID4+PiArCj4gPj4+ICAvKioKPiA+Pj4gICAqIHN0cnVjdCBkcm1fYnJp ZGdlX3N0YXRlIC0gQXRvbWljIGJyaWRnZSBzdGF0ZSBvYmplY3QKPiA+Pj4gICAqIEBiYXNlOiBp bmhlcml0IGZyb20gJmRybV9wcml2YXRlX3N0YXRlCj4gPj4+ICAgKiBAYnJpZGdlOiB0aGUgYnJp ZGdlIHRoaXMgc3RhdGUgcmVmZXJzIHRvCj4gPj4+ICsgKiBAaW5wdXRfYnVzX2luZm86IGlucHV0 IGJ1cyBpbmZvcm1hdGlvbgo+ID4+PiArICogQG91dHB1dF9idXNfaW5mbzogb3V0cHV0IGJ1cyBp bmZvcm1hdGlvbiAgICAKPiA+Pgo+ID4+IEkgd291bGQgbWFrZSB0aGlzIGFuIGFycmF5LCB0byBw cmVwYXJlIGZvciBicmlkZ2VzIHRoYXQgd2lsbCBoYXZlIG1vcmUKPiA+PiB0aGFuIG9uZSBpbnB1 dCBvciBvbmUgb3V0cHV0LiAgCj4gPiAKPiA+IEhtLCBub3Qgc3VyZSBob3cgeW91J2QgcmVwcmVz ZW50IHRoYXQuIEkgZ3Vlc3MgeW91IHdhbnQgdG8gc3VwcG9ydAo+ID4gYnJpZGdlcyB0aGF0IGNh biBhY3RpdmF0ZSBzZXZlcmFsIGlucHV0cytvdXRwdXRzIGluIHBhcmFsbGVsLiBEbyB3ZQo+ID4g ZXZlbiBzdXBwb3J0IHRoYXQgcmlnaHQgbm93Pwo+ID4gQWxzbywgaG93IGRvIHdlIGxpbmsgdGhl IGlucHV0IHRvIHRoZSBvdXRwdXQgaW4gdGhhdCBjYXNlPyBCeSB0aGVpcgo+ID4gcG9zaXRpb24g aW4gdGhlIGFycmF5PyBBbmQgd2UnZCBuZWVkIGFuIGV4dHJhIGZpZWxkIGluIGJ1c19jYXBzIHRv Cj4gPiBwb2ludCB0byB0aGUgY29ycmVzcG9uZGluZyBicmlkZ2UgaW5wdXQvb3V0cHV0IHBvcnQu Cj4gPiAKPiA+IEknbSBnbGFkIHdlIGNhbiBkaXNjdXNzIGFsbCB0aG9zZSBwcm9ibGVtcywgYnV0 IEknZCBsaWtlIHRvIGZvY3VzIG9uCj4gPiB3aGF0J3MgbmVlZGVkIHJpZ2h0IG5vdywgbm90IHdo YXQgY291bGQgcG90ZW50aWFsbHkgYmUgbmVlZGVkIGluIHRoZQo+ID4gZnV0dXJlLiBJZiB3ZSBj YW4gZGVzaWduIHRoaW5ncyB0byBiZSBtb3JlIGZ1dHVyZS1wcm9vZiB0aGF0J3MgZ3JlYXQsCj4g PiBidXQgaW4gbXkgZXhwZXJpZW5jZSwgdHJ5aW5nIHRvIHNvbHZlIHByb2JsZW1zIHRoYXQgZG8g bm90IGV4aXN0IHlldAo+ID4gb2Z0ZW4gbGVhZHMgdG8gY29tcGxleCBkZXNpZ25zIHdoaWNoIHBy b3ZlIHRvIGJlIHdyb25nIHdoZW4gd2UgdHJ5IHRvCj4gPiBhcHBseSB0aGVtIHRvIHJlYWwgc2l0 dWF0aW9ucyB3aGVuIHRoZXkgZmluYWxseSBvY2N1ci4gIAo+IAo+IEkgaGFkIGEgdGhvdWdodCB3 aGVuIGltcGxlbWVudGluZyBidXMgZm9ybWF0IG5lZ290aWF0aW9uIGZvciBkdy1oZG1pLgo+IAo+ IERlcGVuZGluZyBvbiB0aGUgb3V0cHV0IGJ1cy1mb3JtYXQsIHdlIGNvdWxkIGhhdmUgZGlmZmVy ZW50IHNldHMgb2YgcG9zc2libGUKPiBpbnB1dCBkcm1fYnVzX2NhcHMuCj4gCj4gRm9yIGV4YW1w bGUsIGlmIG91dHB1dCBpcyBNRURJQV9CVVNfRk1UX1JHQjg4OF8xWDI0LAo+IHRoZSBpbnB1dCBi dXMgZm9ybWF0cyBjb3VsZCBvbmx5IGJlIE1FRElBX0JVU19GTVRfUkdCODg4XzFYMjQgb3IgTUVE SUFfQlVTX0ZNVF9ZVVY4XzFYMjQuCj4gU2FtZSBmb3IgTUVESUFfQlVTX0ZNVF9SR0IxMDEwMTBf MVgzMCwgTUVESUFfQlVTX0ZNVF9SR0IxMjEyMTJfMVgzNiwgTUVESUFfQlVTX0ZNVF9SR0IxNjE2 MTZfMVg0OC4uLgo+IEFuZCB0aGUgc3BlY2lhbCBNRURJQV9CVVNfRk1UX1VZWVZZWThfMF81WDI0 LCB3aGVyZSBpbnB1dCBtdXN0IGJlIG91dHB1dC4KClNvdW5kcyBleGFjdGx5IGxpa2Ugd2hhdCBM YXVyZW50IHdhcyBkZXNjcmliaW5nLgoKPiAKPiBIb3cgY291bGQgd2UgaGFuZGxlIHRoaXMgPyBJ IG1lYW4sIGNvdWxkIHdlIGhhdmUgYSBmaXhlZAo+IG91dHB1dCBkcm1fYnVzX2NhcHMgYW5kIGJl IGFibGUgdG8gZHluYW1pY2FsbHkgY2hhbmdlIHRoZSBpbnB1dCBkcm1fYnVzX2NhcHMgPwoKSWYg YWxsIG91dHB1dCBlbmRzIG9mIGJyaWRnZXMgaGF2ZSBmaXhlZCBmb3JtYXRzIChtZWFuaW5nIHRo YXQKc29tZXRoaW5nIHNldHMgaXQgdG8gYSBmaXhlZCB2YWx1ZSwgbGlrZSBhIERUIHByb3ApLCB0 aGVyZSdzIG5vIG5lZWQKZm9yIG5lZ290aWF0aW9uIGF0IGFsbCwgc2luY2UgdGhlIG91dHB1dCBv ZiB0aGUgcHJldmlvdXMgZWxlbWVudCBpbgp0aGUgY2hhaW4gd2lsbCBmb3JjZSBpbnB1dCBmb3Jt YXQgb2YgdGhlIGN1cnJlbnQgZWxlbWVudC4KCj4gCj4gQWRkaW5nIG1hdHJpeCBpbiBzdHJ1Y3Qg ZHJtX2JyaWRnZSBzZWVtcyBvdmVyLWVuZ2luZWVyZWQsIG5vID8KCldpbGwgaGF2ZSB0byB0cnkg aXQgdG8gZ2l2ZSBhbiBhbnN3ZXIgdG8gdGhhdCBxdWVzdGlvbiA6KS4KCj4gU2luY2UgaXQgc2hv dWxkIHRha2UKPiBpbiBhY2NvdW50IHRoZSBhY3R1YWwgZHJtX2Rpc3BsYXlfbW9kZS4KClRha2lu ZyB0aGUgZGlzcGxheV9tb2RlIGludG8gYWNjb3VudCBpcyB5ZXQgYW5vdGhlciB0aGluZywgdGhv dWdoIGl0Cm1pZ2h0IGltcGFjdCB0aGUgd2F5IHdlIHdhbnQgdG8gaGFuZGxlIGJ1cy1mb3JtYXQg bmVnb3RpYXRpb24uIFRoZSB3YXkKSSBzZWUgaXQsIHdlIGhhdmUgMiBpc3N1ZXMgdG8gc29sdmU6 CgoxLyBtYWtlIHN1cmUgdGhlIGF0b21pYyBtb2Rlc2V0IGRvZXMgbm90IGZhaWwgaWYgdGhlcmUn cyBhdCBsZWFzdCBvbmUKICAgYnVzLWZvcm1hdCBjb21iaW5hdGlvbiB0aGF0IHdvcmtzICh0aGlz IGlzIHdoYXQgdGhlCiAgIHN1cHBvcnRlZC10cmFuc2NvZGluZyBtYXRyaXggaXMgZm9yKQoyLyBt YWtlIHN1cmUgdGhhdCB3ZSBwaWNrIHRoZSBiZXN0IG9wdGlvbiBhbW9uZyBhbGwgdGhlIHBvc3Np YmlsaXRpZXMuCiAgIFRoYXQgcmVxdWlyZXMgZGVmaW5pbmcgd2hhdCAnYmVzdCcgbWVhbnMuIElu IHNvbWUgY2FzZXMgeW91IG1pZ2h0CiAgIHdhbnQgdG8gcmVkdWNlIHBvd2VyLWNvbnN1bXB0aW9u L2JhbmR3aWR0aCBpbiBvdGhlcnMgeW91IG1pZ2h0IHdhbnQKICAgdG8gcHJlc2VydmUgaW1hZ2Ut cXVhbGl0eSAocmVsYXRpdmUgdG8gdGhlIHNlbGVjdGVkIG1vZGUgb2YgY291cnNlKQoKSSBkZWNp ZGVkIHRvIGlnbm9yZSBwcm9ibGVtICMyIGZvciBub3csIGJ1dCB0aGF0J3MgZGVmaW5pdGVseSBz b21ldGhpbmcKd2Ugc2hvdWxkIHdvcmsgb24gYXQgc29tZSBwb2ludC4gUHJvYmxlbSAjMSBpcyBh IHByb2JsZW0gd2Ugc2hvdWxkCnNvbHZlIG5vdy4gSWYgd2UgZmluZCBhIHNvbHV0aW9uIHRoYXQg c29sdmVzIGJvdGggaXQncyBldmVuIGJldHRlciA6LSkuCgo+IAo+IE1heWJlIGJ5IHBhc3Npbmcg YSBkeW5hbWljIGlucHV0IGRybV9idXNfY2FwcyB0byBkcm1fYXRvbWljX2JyaWRnZV9jaG9vc2Vf aW5wdXRfYnVzX2NmZygpCj4gYW5kIHRha2UgdGhlIGRlZmF1bHQgc3RydWN0IGRybV9icmlkZ2Ug b25lIGlmIG5vdCBwcm92aWRlZCA/CgpJSVVDLCB5b3UgcHJvcG9zZSB0byByZXN0cmljdCB0aGUg c2V0IG9mIGlucHV0IGZvcm1hdHMgYmFzZWQgb24gdGhlCnNlbGVjdGVkIG91dHB1dCBmb3JtYXQg ZnJvbSBpbnNpZGUgdGhlIGRyaXZlciAtPmF0b21pY19jaGVjaygpCmltcGxlbWVudGF0aW9uLiBU aGF0J3MgYmFzaWNhbGx5IGxpa2Ugb3Blbi1jb2RpbmcgdGhlCnN1cHBvcnRlZC10cmFuc2NvZGlu ZyBtYXRyaXg6IHlvdSdsbCBoYXZlIHRvIGhhdmUgYSBsaXN0IG9mIHN1cHBvcnRlZAppbnB1dCBm b3JtYXRzIGZvciBlYWNoIG91dHB1dCBmb3JtYXQgKG9yIHNldCBvZiBvdXRwdXQgZm9ybWF0cyks IHJpZ2h0PwoKTm90ZSB0aGF0IHdlIGNvdWxkIGltcGxlbWVudCB0aGUgc3VwcG9ydGVkLXRyYW5z Y29kaW5nIHRoaW5nIHdpdGggYSBob29rCmluc3RlYWQgb2YgYSBtYXRyaXgsIGJ1dCwgbm8gbWF0 dGVyIHRoZSBzb2x1dGlvbiB3ZSBwaWNrLCBpdCB3aWxsIGFsd2F5cwpiZSBzb21ldGhpbmcgdGhh dCBjYW4gYW5zd2VyIHRoaXMgcXVlc3Rpb24gImlzIGJyaWRnZSBYIGFibGUgdG8gY29udmVydApp bnB1dCBmb3JtYXQgQSBpbnRvIG91dHB1dCBmb3JtYXQgQj8iLgoKVGhlIG5pY2UgdGhpbmcgYWJv dXQgaGF2aW5nIHRoZSB0cmFuc2NvZGluZyBtYXRyaXggY2FsY3VsYXRlZCBhdCBhdHRhY2gKdGlt ZSBpcyB0aGF0IHlvdSByZWplY3QgY29tYmluYXRpb25zIHRoYXQgYXJlIG5vdCBwb3NzaWJsZSBl YXJseSBpbnN0ZWFkCm9mIGhhdmluZyB0byBkbyB0aGlzIHdvcmsgYXQgZWFjaCBhdG9taWNfY2hl Y2soKS4gQWxzbywgaWYgeW91J3JlIG5vdApyZWplY3RpbmcgaW1wb3NzaWJsZSBjb21iaW5hdGlv bnMgZWFybHksIEkgdGhpbmsgeW91IHN0aWxsIGhhdmUgdGhlCnByb2JsZW0gTGF1cmVudCB3YXMg dGFsa2luZyBhYm91dCB3aGVuIHlvdSBoYXZlIG1vcmUgdGhhbiAyIGVsZW1lbnRzIGluCnRoZSBj aGFpbi4KCj4gVGhpcyB3b3VsZCByZWFsbHkgc2ltcGxpZnkgdGhlIGJyaWRnZSBhdG9taWNfY2hl Y2sgaW1wbGVtZW50YXRpb24gYnkgcmV1c2luZwo+IHRoZSBkcm1fYXRvbWljX2JyaWRnZV9jaG9v c2VfKigpIGZ1bmN0aW9ucy4KPiAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVk ZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZv L2RyaS1kZXZlbA==