From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= Subject: [PATCH v2 9/9] drm/i915/dp: Avoid concurrent access when HW is using aux ch Date: Wed, 18 Apr 2018 15:43:11 -0700 Message-ID: <20180418224311.16577-9-jose.souza@intel.com> References: <20180418224311.16577-1-jose.souza@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3B2116E1F7 for ; Wed, 18 Apr 2018 22:43:06 +0000 (UTC) In-Reply-To: <20180418224311.16577-1-jose.souza@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org Cc: Dhinakaran Pandiyan List-Id: intel-gfx@lists.freedesktop.org VGhpcyB3aWxsIGF2b2lkIHNvbWUgY2FzZXMgb2YgY29uY3VycmVudCBhY2Nlc3MgdG8gYXV4IGNo IHJlZ2lzdGVycyB3aGVuCmhhcmR3YXJlIGlzIHVzaW5nIGl0KEhXIHVzZXMgaXQgd2hlbiBQU1Is IEdUQyBhbmQgYXV4IGZyYW1lIGlzIGVuYWJsZWQpLgoKSXQgaXMganVzdCBmaXJzdCBzdGVwIHRv IHNlZSBpZiB0aGlzIHNjZW5hcmlvIGhhcHBlbnMsIGlmIHNvIGl0IHdpbGwgYmUKcHJvcGVybHkg aGFuZGxlZCBhcyBkZXNjcmliZWQgaW4gYnNwZWMuCgpTaWduZWQtb2ZmLWJ5OiBKb3PDqSBSb2Jl cnRvIGRlIFNvdXphIDxqb3NlLnNvdXphQGludGVsLmNvbT4KQ2M6IERoaW5ha2FyYW4gUGFuZGl5 YW4gPGRoaW5ha2FyYW4ucGFuZGl5YW5AaW50ZWwuY29tPgotLS0KCk5ldyBwYXRjaCBpbiB0aGlz IHNlcmllcywgdGhpcyBpcyByZXBsYWNpbmcgdG8gdGhlIHBhdGNoZXMgaW4gdGhpcyBzZXJpZXMg dGhhdAp3YXMgZXhpdGluZyBQU1IgYmVmb3JlIGEgYXV4IHRyYW5zYWN0aW9uLgpBcyBkaXNjdXNz ZWQgd2l0aCBEaGluYWthcmFuLCBsZXQncyBjaGVjayBmaXJzdCBpZiB0aGlzIHNjZW5hcnkgaGFw cGVucyBpZgpzbyBJIHdpbGwgYnJpbmcgdGhvc2UgcGF0Y2hlcyBiYWNrLgoKIGRyaXZlcnMvZ3B1 L2RybS9pOTE1L2ludGVsX2RwLmMgfCAxOCArKysrKysrKysrKysrKystLS0KIDEgZmlsZSBjaGFu Z2VkLCAxNSBpbnNlcnRpb25zKCspLCAzIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZl cnMvZ3B1L2RybS9pOTE1L2ludGVsX2RwLmMgYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9k cC5jCmluZGV4IDI1OGUyMzk2MTQ1Ni4uNzRhYmQ0Y2Q5M2RkIDEwMDY0NAotLS0gYS9kcml2ZXJz L2dwdS9kcm0vaTkxNS9pbnRlbF9kcC5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2ludGVs X2RwLmMKQEAgLTEwNjIsNyArMTA2Miw3IEBAIHN0YXRpYyB1aW50MzJfdCBza2xfZ2V0X2F1eF9z ZW5kX2N0bChzdHJ1Y3QgaW50ZWxfZHAgKmludGVsX2RwLAogCSAgICAgICBEUF9BVVhfQ0hfQ1RM X1NZTkNfUFVMU0VfU0tMKDMyKTsKIH0KIAotc3RhdGljIGJvb2wgaW50ZWxfZHBfYXV4X2lzX2J1 c3koc3RydWN0IGludGVsX2RwICppbnRlbF9kcCkKK3N0YXRpYyBib29sIGludGVsX2RwX2F1eF9p c19idXN5KHN0cnVjdCBpbnRlbF9kcCAqaW50ZWxfZHAsIHVuc2lnbmVkIGludCB0cmllcykKIHsK IAlzdHJ1Y3QgaW50ZWxfZGlnaXRhbF9wb3J0ICppbnRlbF9kaWdfcG9ydCA9IGRwX3RvX2RpZ19w b3J0KGludGVsX2RwKTsKIAlzdHJ1Y3QgZHJtX2k5MTVfcHJpdmF0ZSAqZGV2X3ByaXYgPQpAQCAt MTA3Myw3ICsxMDczLDcgQEAgc3RhdGljIGJvb2wgaW50ZWxfZHBfYXV4X2lzX2J1c3koc3RydWN0 IGludGVsX2RwICppbnRlbF9kcCkKIAogCWNoX2N0bCA9IGludGVsX2RwLT5hdXhfY2hfY3RsX3Jl ZyhpbnRlbF9kcCk7CiAKLQlmb3IgKHRyeSA9IDM7IHRyeTsgdHJ5LS0pIHsKKwlmb3IgKHRyeSA9 IHRyaWVzOyB0cnk7IHRyeS0tKSB7CiAJCXN0YXR1cyA9IEk5MTVfUkVBRF9OT1RSQUNFKGNoX2N0 bCk7CiAJCWlmICgoc3RhdHVzICYgRFBfQVVYX0NIX0NUTF9TRU5EX0JVU1kpID09IDApCiAJCQly ZXR1cm4gZmFsc2U7CkBAIC0xMTI3LDcgKzExMjcsNyBAQCBpbnRlbF9kcF9hdXhfeGZlcihzdHJ1 Y3QgaW50ZWxfZHAgKmludGVsX2RwLAogCWludGVsX2RwX2NoZWNrX2VkcChpbnRlbF9kcCk7CiAK IAkvKiBUcnkgdG8gd2FpdCBmb3IgYW55IHByZXZpb3VzIEFVWCBjaGFubmVsIGFjdGl2aXR5ICov Ci0JaWYgKGludGVsX2RwX2F1eF9pc19idXN5KGludGVsX2RwKSkgeworCWlmIChpbnRlbF9kcF9h dXhfaXNfYnVzeShpbnRlbF9kcCwgMykpIHsKIAkJcmV0ID0gLUVCVVNZOwogCQlnb3RvIG91dDsK IAl9CkBAIC0xMTQ4LDYgKzExNDgsMTggQEAgaW50ZWxfZHBfYXV4X3hmZXIoc3RydWN0IGludGVs X2RwICppbnRlbF9kcCwKIAogCQkvKiBNdXN0IHRyeSBhdCBsZWFzdCAzIHRpbWVzIGFjY29yZGlu ZyB0byBEUCBzcGVjICovCiAJCWZvciAodHJ5ID0gMDsgdHJ5IDwgNTsgdHJ5KyspIHsKKwkJCS8q IFdBOiB0cnkgdG8gYXZvaWQgY29uY3VycmVudCBhY2Nlc3MgdG8gYXV4IGNoCisJCQkgKiByZWdp c3RlcnMgd2hpbGUgaGFyZHdhcmUgaXMgdXNpbmcgaXQsIHRoZSBvdGhlcgorCQkJICogd2F5IGlz IG5vdCBoYW5kbGVkIGF0IGFsbC4KKwkJCSAqLworCQkJaWYgKGludGVsX2RwX2F1eF9pc19idXN5 KGludGVsX2RwLCAxKSkgeworCQkJCURSTV9FUlJPUigiQXV4IGNoICVjIGlzIGJ1c3ksIGh3IGlz IHVzaW5nIGl0IiwKKwkJCQkJICBhdXhfY2hfbmFtZShpbnRlbF9kcC0+YXV4X2NoKSk7CisJCQkJ Lyogc2xlZXAgZm9yIGEgdHJhbnNhY3Rpb24gdGltZSAqLworCQkJCXVzbGVlcF9yYW5nZSg0MDAs IDUwMCk7CisJCQkJY29udGludWU7CisJCQl9CisKIAkJCS8qIExvYWQgdGhlIHNlbmQgZGF0YSBp bnRvIHRoZSBhdXggY2hhbm5lbCBkYXRhIHJlZ2lzdGVycyAqLwogCQkJZm9yIChpID0gMDsgaSA8 IHNlbmRfYnl0ZXM7IGkgKz0gNCkKIAkJCQlJOTE1X1dSSVRFKGNoX2RhdGFbaSA+PiAyXSwKLS0g CjIuMTcuMAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K SW50ZWwtZ2Z4IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0 dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg==