From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dhinakaran Pandiyan Subject: Re: [PATCH 1/6] drm/i915/psr: Avoid DPCD reads when panel does not support PSR Date: Mon, 21 May 2018 16:40:57 -0700 Message-ID: <1526946057.17473.192.camel@intel.com> References: <20180511195145.3829-1-dhinakaran.pandiyan@intel.com> <20180518002740.GA67699@otc-chromeosbuild-5> Reply-To: dhinakaran.pandiyan@intel.com Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id D717F6E03C for ; Mon, 21 May 2018 23:15:25 +0000 (UTC) In-Reply-To: <20180518002740.GA67699@otc-chromeosbuild-5> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Tarun Vyas Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org T24gVGh1LCAyMDE4LTA1LTE3IGF0IDE3OjI3IC0wNzAwLCBUYXJ1biBWeWFzIHdyb3RlOgo+IE9u IEZyaSwgTWF5IDExLCAyMDE4IGF0IDEyOjUxOjQwUE0gLTA3MDAsIERoaW5ha2FyYW4gUGFuZGl5 YW4gd3JvdGU6Cj4gPiAKPiA+IFZpbGxlIG5vdGljZWQgdGhhdCB3ZSBhcmUgdW5uY2Vzc2FyaWx5 IHJlYWRpbmcgRFBDRCdzIGFmdGVyIGtub3dpbmcKPiA+IHBhbmVsIGRpZCBub3Qgc3VwcG9ydCBQ U1IuIExvb2tzIGxpa2UgdGhpcyBjaGVjayB0aGF0IHdhcyBwcmVzZW50Cj4gPiBlYXJsaWVyIGdv dCByZW1vdmVkIHVuaW50ZW50aW9uYWxseSwgbGV0J3MgcHV0IGl0IGJhY2suCj4gPiAKPiA+IFdo aWxlIHdlIGRvIHRoaXMsIGFkZCB0aGUgUFNSIHZlcnNpb24gbnVtYmVyIGluIHRoZSBkZWJ1ZyBw cmludC4KPiA+IAo+ID4gQ2M6IFZpbGxlIFN5cmrDpGzDpCA8dmlsbGUuc3lyamFsYUBsaW51eC5p bnRlbC5jb20+Cj4gPiBTaWduZWQtb2ZmLWJ5OiBEaGluYWthcmFuIFBhbmRpeWFuIDxkaGluYWth cmFuLnBhbmRpeWFuQGludGVsLmNvbT4KPiA+IC0tLQo+ID4gwqBkcml2ZXJzL2dwdS9kcm0vaTkx NS9pbnRlbF9wc3IuYyB8IDE0ICsrKysrKysrLS0tLS0tCj4gPiDCoDEgZmlsZSBjaGFuZ2VkLCA4 IGluc2VydGlvbnMoKyksIDYgZGVsZXRpb25zKC0pCj4gPiAKPiA+IGRpZmYgLS1naXQgYS9kcml2 ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wc3IuYwo+ID4gYi9kcml2ZXJzL2dwdS9kcm0vaTkxNS9p bnRlbF9wc3IuYwo+ID4gaW5kZXggZGIyN2YyZmFhMWRlLi44ZmU2ZDJmOWFiMmIgMTAwNjQ0Cj4g PiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vaTkxNS9pbnRlbF9wc3IuYwo+ID4gKysrIGIvZHJpdmVy cy9ncHUvZHJtL2k5MTUvaW50ZWxfcHNyLmMKPiA+IEBAIC0yNTAsMTAgKzI1MCwxMiBAQCB2b2lk IGludGVsX3Bzcl9pbml0X2RwY2Qoc3RydWN0IGludGVsX2RwCj4gPiAqaW50ZWxfZHApCj4gPiDC oAlkcm1fZHBfZHBjZF9yZWFkKCZpbnRlbF9kcC0+YXV4LCBEUF9QU1JfU1VQUE9SVCwgaW50ZWxf ZHAtCj4gPiA+cHNyX2RwY2QsCj4gPiDCoAkJCcKgc2l6ZW9mKGludGVsX2RwLT5wc3JfZHBjZCkp Owo+ID4gwqAKPiA+IC0JaWYgKGludGVsX2RwLT5wc3JfZHBjZFswXSkgewo+ID4gLQkJZGV2X3By aXYtPnBzci5zaW5rX3N1cHBvcnQgPSB0cnVlOwo+ID4gLQkJRFJNX0RFQlVHX0tNUygiRGV0ZWN0 ZWQgRURQIFBTUiBQYW5lbC5cbiIpOwo+ID4gLQl9Cj4gPiArCWlmICghaW50ZWxfZHAtPnBzcl9k cGNkWzBdKQo+ID4gKwkJcmV0dXJuOwo+ID4gKwo+ID4gKwlEUk1fREVCVUdfS01TKCJlRFAgcGFu ZWwgc3VwcG9ydHMgUFNSIHZlcnNpb24gJXhcbiIsCj4gPiArCQnCoMKgwqDCoMKgwqBpbnRlbF9k cC0+cHNyX2RwY2RbMF0pOwo+ID4gKwlkZXZfcHJpdi0+cHNyLnNpbmtfc3VwcG9ydCA9IHRydWU7 Cj4gPiDCoAo+ID4gwqAJaWYgKElOVEVMX0dFTihkZXZfcHJpdikgPj0gOSAmJgo+ID4gwqAJwqDC oMKgwqAoaW50ZWxfZHAtPnBzcl9kcGNkWzBdID09Cj4gPiBEUF9QU1IyX1dJVEhfWV9DT09SRF9J U19TVVBQT1JURUQpKSB7Cj4gPiBAQCAtMjcwLDggKzI3Miw4IEBAIHZvaWQgaW50ZWxfcHNyX2lu aXRfZHBjZChzdHJ1Y3QgaW50ZWxfZHAKPiA+ICppbnRlbF9kcCkKPiA+IMKgCQnCoCovCj4gPiDC oAkJZGV2X3ByaXYtPnBzci5zaW5rX3BzcjJfc3VwcG9ydCA9Cj4gPiDCoAkJCQlpbnRlbF9kcF9n ZXRfeV9jb29yZF9yZXF1aXJlZChpbnRlCj4gPiBsX2RwKTsKPiA+IC0JCURSTV9ERUJVR19LTVMo IlBTUjIgJXMgb24gc2luayIsIGRldl9wcml2LQo+ID4gPnBzci5zaW5rX3BzcjJfc3VwcG9ydAo+ ID4gLQkJCcKgwqDCoMKgwqDCoD8gInN1cHBvcnRlZCIgOiAibm90IHN1cHBvcnRlZCIpOwo+ID4g KwkJRFJNX0RFQlVHX0tNUygiUFNSMiAlc3N1cHBvcnRlZFxuIiwKPiA+ICsJCQnCoMKgwqDCoMKg wqBkZXZfcHJpdi0+cHNyLnNpbmtfcHNyMl9zdXBwb3J0ID8gIiIKPiA+IDogIm5vdCAiKTsKPiBX b3VsZCBpdCBtYWtlIHNlbnNlIHRvIG1ha2UgaXQgY2xlYXJlciB0aGF0IFBTUjIgaXMgbm90IHN1 cHBvcnRlZCBiL2MKPiBvZiBsYWNrIG9mIHktY29vcmRpbmF0ZSBzdXBwb3J0IG9uIHRoZSBzaW5r ID8KCldlIGNvdWxkIGRvIHNvbWV0aGluZyBsaWtlwqAKCmRldl9wcml2LT5wc3Iuc2lua19wc3Iy X3N1cHBvcnQgPSB5X3JlcSAmJiBhbHBtOwpEUk1fREVCVUdfS01TKCJQU1IyICVzc3VwcG9ydGVk IEFMUE0gJWQgWS1yZXEgJWRcbiIsCsKgIMKgIMKgIMKgIMKgIMKgIMKgIGRldl9wcml2LT5wc3Iu c2lua19wc3IyX3N1cHBvcnQgPyAiIiA6ICJub3QgIiwKwqAgwqAgwqAgwqAgwqAgwqAgwqAgYWxw bSwgeV9yZXEpOwoKQnV0IHRoaXMgd291bGQgbmVlZCB0aGUgY29kZSBtb3ZlbWVudCBkb25lIGlu IHBhdGNoIDYvNi4KCgo+IAo+IFJldmlld2VkLWJ5OiBUYXJ1biBWeWFzIDx0YXJ1bi52eWFzQGlu dGVsLmNvbT4KPiA+IAo+ID4gwqAKPiA+IMKgCQlpZiAoZGV2X3ByaXYtPnBzci5zaW5rX3BzcjJf c3VwcG9ydCkgewo+ID4gwqAJCQlkZXZfcHJpdi0+cHNyLmNvbG9yaW1ldHJ5X3N1cHBvcnQgPQpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZngg bWFpbGluZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK