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Sat, 07 May 2022 07:22:03 -0700 (PDT) Message-ID: <6c6ec0db-111c-e48f-57ce-0e444a0d168e@gmail.com> Date: Sat, 7 May 2022 23:21:59 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [RFC PATCH 2/2] PM / devfreq: rk3399_dmc: Block PMU during transitions Content-Language: en-US From: Chanwoo Choi To: =?UTF-8?Q?Heiko_St=c3=bcbner?= , Brian Norris , MyungJoo Ham , Kyungmin Park , Chanwoo Choi Cc: linux-kernel@vger.kernel.org, Elaine Zhang , linux-pm@vger.kernel.org, Doug Anderson , linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org References: <20220406014842.2771799-1-briannorris@chromium.org> <20220405184816.RFC.2.I2d73b403944f0b8b5871a77585b73f31ccc62999@changeid> <8824147c-5512-a7a5-9e89-60b510111500@gmail.com> <3484357.R56niFO833@diego> <582e3645-b24e-356e-7f0f-0d37bb1e32e6@gmail.com> In-Reply-To: <582e3645-b24e-356e-7f0f-0d37bb1e32e6@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220507_072206_386807_0C291E36 X-CRM114-Status: GOOD ( 17.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjIuIDQuIDE0LiAwODoxMywgQ2hhbndvbyBDaG9pIHdyb3RlOgo+IE9uIDIyLiA0LiAxNC4g MDc6NDUsIEhlaWtvIFN0w7xibmVyIHdyb3RlOgo+PiBIaSwKPj4KPj4gQW0gRG9ubmVyc3RhZywg MTQuIEFwcmlsIDIwMjIsIDAwOjE0OjQwIENFU1Qgc2NocmllYiBDaGFud29vIENob2k6Cj4+PiBP biAyMi4gNC4gNi4gMTA6NDgsIEJyaWFuIE5vcnJpcyB3cm90ZToKPj4+PiBTZWUgdGhlIHByZXZp b3VzIHBhdGNoICgic29jOiByb2NrY2hpcDogcG93ZXItZG9tYWluOiBNYW5hZ2UgcmVzb3VyY2UK Pj4+PiBjb25mbGljdHMgd2l0aCBmaXJtd2FyZSIpIGZvciBhIHRob3JvdWdoIGV4cGxhbmF0aW9u IG9mIHRoZSBjb25mbGljdHMuCj4+Pj4gV2hpbGUgQVJNIFRydXN0ZWQgRmlybXdhcmUgbWF5IGJl IG1vZGlmeWluZyBtZW1vcnkgY29udHJvbGxlciBhbmQKPj4+PiBwb3dlci1kb21haW4gc3RhdGVz LCB3ZSBuZWVkIHRvIGJsb2NrIHRoZSBrZXJuZWwncyBwb3dlci1kb21haW4gZHJpdmVyLgo+Pj4+ Cj4+Pj4gSWYgdGhlIHBvd2VyLWRvbWFpbiBkcml2ZXIgaXMgZGlzYWJsZWQsIHRoZXJlIGlzIG5v IHJlc291cmNlIGNvbmZsaWN0Cj4+Pj4gYW5kIHRoaXMgYmVjb21lcyBhIG5vLW9wLgo+Pj4+Cj4+ Pj4gU2lnbmVkLW9mZi1ieTogQnJpYW4gTm9ycmlzIDxicmlhbm5vcnJpc0BjaHJvbWl1bS5vcmc+ Cj4+Pj4gLS0tCj4+Pj4KPj4+PiDCoMKgIGRyaXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMgfCAx MyArKysrKysrKysrKysrCj4+Pj4gwqDCoCAxIGZpbGUgY2hhbmdlZCwgMTMgaW5zZXJ0aW9ucygr KQo+Pj4+Cj4+Pj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMgCj4+ Pj4gYi9kcml2ZXJzL2RldmZyZXEvcmszMzk5X2RtYy5jCj4+Pj4gaW5kZXggZTQ5NGQxNDk3ZDYw Li5kYWZmNDA3MDI2MTUgMTAwNjQ0Cj4+Pj4gLS0tIGEvZHJpdmVycy9kZXZmcmVxL3JrMzM5OV9k bWMuYwo+Pj4+ICsrKyBiL2RyaXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMKPj4+PiBAQCAtMjEs NiArMjEsNyBAQAo+Pj4+IMKgwqAgI2luY2x1ZGUgPGxpbnV4L3J3c2VtLmg+Cj4+Pj4gwqDCoCAj aW5jbHVkZSA8bGludXgvc3VzcGVuZC5oPgo+Pj4+ICsjaW5jbHVkZSA8c29jL3JvY2tjaGlwL3Bt X2RvbWFpbnMuaD4KPj4+PiDCoMKgICNpbmNsdWRlIDxzb2Mvcm9ja2NoaXAvcmszMzk5X2dyZi5o Pgo+Pj4+IMKgwqAgI2luY2x1ZGUgPHNvYy9yb2NrY2hpcC9yb2NrY2hpcF9zaXAuaD4KPj4+PiBA QCAtOTMsNiArOTQsMTYgQEAgc3RhdGljIGludCByazMzOTlfZG1jZnJlcV90YXJnZXQoc3RydWN0 IGRldmljZSAKPj4+PiAqZGV2LCB1bnNpZ25lZCBsb25nICpmcmVxLAo+Pj4+IMKgwqDCoMKgwqDC oCBtdXRleF9sb2NrKCZkbWNmcmVxLT5sb2NrKTsKPj4+PiArwqDCoMKgIC8qCj4+Pj4gK8KgwqDC oMKgICogRW5zdXJlIHBvd2VyLWRvbWFpbiB0cmFuc2l0aW9ucyBkb24ndCBpbnRlcmZlcmUgd2l0 aCBBUk0gCj4+Pj4gVHJ1c3RlZAo+Pj4+ICvCoMKgwqDCoCAqIEZpcm13YXJlIHBvd2VyLWRvbWFp biBpZGxpbmcuCj4+Pj4gK8KgwqDCoMKgICovCj4+Pj4gK8KgwqDCoCBlcnIgPSByb2NrY2hpcF9w bXVfYmxvY2soKTsKPj4+PiArwqDCoMKgIGlmIChlcnIpIHsKPj4+PiArwqDCoMKgwqDCoMKgwqAg ZGV2X2VycihkZXYsICJGYWlsZWQgdG8gYmxvY2sgUE1VOiAlZFxuIiwgZXJyKTsKPj4+PiArwqDC oMKgwqDCoMKgwqAgZ290byBvdXRfdW5sb2NrOwo+Pj4+ICvCoMKgwqAgfQo+Pj4+ICsKPj4+PiDC oMKgwqDCoMKgwqAgLyoKPj4+PiDCoMKgwqDCoMKgwqDCoCAqIFNvbWUgaWRsZSBwYXJhbWV0ZXJz IG1heSBiZSBiYXNlZCBvbiB0aGUgRERSIGNvbnRyb2xsZXIgCj4+Pj4gY2xvY2ssIHdoaWNoCj4+ Pj4gwqDCoMKgwqDCoMKgwqAgKiBpcyBoYWxmIG9mIHRoZSBERFIgZnJlcXVlbmN5Lgo+Pj4+IEBA IC0xOTgsNiArMjA5LDggQEAgc3RhdGljIGludCByazMzOTlfZG1jZnJlcV90YXJnZXQoc3RydWN0 IGRldmljZSAKPj4+PiAqZGV2LCB1bnNpZ25lZCBsb25nICpmcmVxLAo+Pj4+IMKgwqDCoMKgwqDC oCBkbWNmcmVxLT52b2x0ID0gdGFyZ2V0X3ZvbHQ7Cj4+Pj4gwqDCoCBvdXQ6Cj4+Pj4gK8KgwqDC oCByb2NrY2hpcF9wbXVfdW5ibG9jaygpOwo+Pj4+ICtvdXRfdW5sb2NrOgo+Pj4+IMKgwqDCoMKg wqDCoCBtdXRleF91bmxvY2soJmRtY2ZyZXEtPmxvY2spOwo+Pj4+IMKgwqDCoMKgwqDCoCByZXR1 cm4gZXJyOwo+Pj4+IMKgwqAgfQo+Pj4KPj4+IEFja2VkLWJ5OiBDaGFud29vIENob2kgPGN3MDAu Y2hvaUBzYW1zdW5nLmNvbT4KPj4KPj4gc28gSSBndWVzcyB5b3UncmUgb2sgd2l0aCBtZSBwaWNr aW5nIHVwIGJvdGggcGF0Y2hlcywgcmlnaHQ/Cj4+IFtKdXN0IG1ha2luZyBzdXJlIDotKSBdCj4g Cj4gVGhpcyBwYXRjaCBoYXZlIHRoZSBkZXBlbmRlbmN5IG9mIGxhdGVzdCBkZXZmcmVxLW5leHQg YnJhbmNoLgo+IFNvIHRoYXQgbmVlZCB0byBtYWtlIHRoZSBpbW11dGFibGUgYnJhbmNoIGJldHdl ZW4gcm9ja2NoaXAgYW5kIGRldmZyZXEuCj4gCgpIaSBIZWlrbyBhbmQgQnJpYW4sCgpJcyB0aGVy ZSBhbnkgb3RoZXIgcHJvZ3Jlc3M/CgpJTUhPLCBpZiByb2NrY2hpcCBtYWludGFpbmVyIHJlcGx5 IHRoZSBhY2tlZC1ieSBmcm9tIHBhdGNoMQphbmQgdGhlbiBhZ3JlZSB0aGVzZSBwYXRjaGVzIHRv IGJlIGFwcGxpZWQgdG8gZGV2ZnJlcS5naXQsCkkgY2FuIHRha2UgdGhlbS4KCi0tIApCZXN0IFJl Z2FyZHMsClNhbXN1bmcgRWxlY3Ryb25pY3MKQ2hhbndvbyBDaG9pCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcg bGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmlu ZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==