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Sun, 08 May 2022 11:42:09 -0700 (PDT) Message-ID: Date: Mon, 9 May 2022 03:42:05 +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 To: Heiko Stuebner , 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> <582e3645-b24e-356e-7f0f-0d37bb1e32e6@gmail.com> <6c6ec0db-111c-e48f-57ce-0e444a0d168e@gmail.com> <44651538.fMDQidcC6G@phil> From: Chanwoo Choi In-Reply-To: <44651538.fMDQidcC6G@phil> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220508_114210_807562_30E5166E X-CRM114-Status: GOOD ( 20.52 ) 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 T24gMjIuIDUuIDkuIDAwOjA3LCBIZWlrbyBTdHVlYm5lciB3cm90ZToKPiBBbSBTYW1zdGFnLCA3 LiBNYWkgMjAyMiwgMTY6MjE6NTkgQ0VTVCBzY2hyaWViIENoYW53b28gQ2hvaToKPj4gT24gMjIu IDQuIDE0LiAwODoxMywgQ2hhbndvbyBDaG9pIHdyb3RlOgo+Pj4gT24gMjIuIDQuIDE0LiAwNzo0 NSwgSGVpa28gU3TDvGJuZXIgd3JvdGU6Cj4+Pj4gSGksCj4+Pj4KPj4+PiBBbSBEb25uZXJzdGFn LCAxNC4gQXByaWwgMjAyMiwgMDA6MTQ6NDAgQ0VTVCBzY2hyaWViIENoYW53b28gQ2hvaToKPj4+ Pj4gT24gMjIuIDQuIDYuIDEwOjQ4LCBCcmlhbiBOb3JyaXMgd3JvdGU6Cj4+Pj4+PiBTZWUgdGhl IHByZXZpb3VzIHBhdGNoICgic29jOiByb2NrY2hpcDogcG93ZXItZG9tYWluOiBNYW5hZ2UgcmVz b3VyY2UKPj4+Pj4+IGNvbmZsaWN0cyB3aXRoIGZpcm13YXJlIikgZm9yIGEgdGhvcm91Z2ggZXhw bGFuYXRpb24gb2YgdGhlIGNvbmZsaWN0cy4KPj4+Pj4+IFdoaWxlIEFSTSBUcnVzdGVkIEZpcm13 YXJlIG1heSBiZSBtb2RpZnlpbmcgbWVtb3J5IGNvbnRyb2xsZXIgYW5kCj4+Pj4+PiBwb3dlci1k b21haW4gc3RhdGVzLCB3ZSBuZWVkIHRvIGJsb2NrIHRoZSBrZXJuZWwncyBwb3dlci1kb21haW4g ZHJpdmVyLgo+Pj4+Pj4KPj4+Pj4+IElmIHRoZSBwb3dlci1kb21haW4gZHJpdmVyIGlzIGRpc2Fi bGVkLCB0aGVyZSBpcyBubyByZXNvdXJjZSBjb25mbGljdAo+Pj4+Pj4gYW5kIHRoaXMgYmVjb21l cyBhIG5vLW9wLgo+Pj4+Pj4KPj4+Pj4+IFNpZ25lZC1vZmYtYnk6IEJyaWFuIE5vcnJpcyA8YnJp YW5ub3JyaXNAY2hyb21pdW0ub3JnPgo+Pj4+Pj4gLS0tCj4+Pj4+Pgo+Pj4+Pj4gICAgIGRyaXZl cnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMgfCAxMyArKysrKysrKysrKysrCj4+Pj4+PiAgICAgMSBm aWxlIGNoYW5nZWQsIDEzIGluc2VydGlvbnMoKykKPj4+Pj4+Cj4+Pj4+PiBkaWZmIC0tZ2l0IGEv ZHJpdmVycy9kZXZmcmVxL3JrMzM5OV9kbWMuYwo+Pj4+Pj4gYi9kcml2ZXJzL2RldmZyZXEvcmsz Mzk5X2RtYy5jCj4+Pj4+PiBpbmRleCBlNDk0ZDE0OTdkNjAuLmRhZmY0MDcwMjYxNSAxMDA2NDQK Pj4+Pj4+IC0tLSBhL2RyaXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMKPj4+Pj4+ICsrKyBiL2Ry aXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMKPj4+Pj4+IEBAIC0yMSw2ICsyMSw3IEBACj4+Pj4+ PiAgICAgI2luY2x1ZGUgPGxpbnV4L3J3c2VtLmg+Cj4+Pj4+PiAgICAgI2luY2x1ZGUgPGxpbnV4 L3N1c3BlbmQuaD4KPj4+Pj4+ICsjaW5jbHVkZSA8c29jL3JvY2tjaGlwL3BtX2RvbWFpbnMuaD4K Pj4+Pj4+ICAgICAjaW5jbHVkZSA8c29jL3JvY2tjaGlwL3JrMzM5OV9ncmYuaD4KPj4+Pj4+ICAg ICAjaW5jbHVkZSA8c29jL3JvY2tjaGlwL3JvY2tjaGlwX3NpcC5oPgo+Pj4+Pj4gQEAgLTkzLDYg Kzk0LDE2IEBAIHN0YXRpYyBpbnQgcmszMzk5X2RtY2ZyZXFfdGFyZ2V0KHN0cnVjdCBkZXZpY2UK Pj4+Pj4+ICpkZXYsIHVuc2lnbmVkIGxvbmcgKmZyZXEsCj4+Pj4+PiAgICAgICAgIG11dGV4X2xv Y2soJmRtY2ZyZXEtPmxvY2spOwo+Pj4+Pj4gKyAgICAvKgo+Pj4+Pj4gKyAgICAgKiBFbnN1cmUg cG93ZXItZG9tYWluIHRyYW5zaXRpb25zIGRvbid0IGludGVyZmVyZSB3aXRoIEFSTQo+Pj4+Pj4g VHJ1c3RlZAo+Pj4+Pj4gKyAgICAgKiBGaXJtd2FyZSBwb3dlci1kb21haW4gaWRsaW5nLgo+Pj4+ Pj4gKyAgICAgKi8KPj4+Pj4+ICsgICAgZXJyID0gcm9ja2NoaXBfcG11X2Jsb2NrKCk7Cj4+Pj4+ PiArICAgIGlmIChlcnIpIHsKPj4+Pj4+ICsgICAgICAgIGRldl9lcnIoZGV2LCAiRmFpbGVkIHRv IGJsb2NrIFBNVTogJWRcbiIsIGVycik7Cj4+Pj4+PiArICAgICAgICBnb3RvIG91dF91bmxvY2s7 Cj4+Pj4+PiArICAgIH0KPj4+Pj4+ICsKPj4+Pj4+ICAgICAgICAgLyoKPj4+Pj4+ICAgICAgICAg ICogU29tZSBpZGxlIHBhcmFtZXRlcnMgbWF5IGJlIGJhc2VkIG9uIHRoZSBERFIgY29udHJvbGxl cgo+Pj4+Pj4gY2xvY2ssIHdoaWNoCj4+Pj4+PiAgICAgICAgICAqIGlzIGhhbGYgb2YgdGhlIERE UiBmcmVxdWVuY3kuCj4+Pj4+PiBAQCAtMTk4LDYgKzIwOSw4IEBAIHN0YXRpYyBpbnQgcmszMzk5 X2RtY2ZyZXFfdGFyZ2V0KHN0cnVjdCBkZXZpY2UKPj4+Pj4+ICpkZXYsIHVuc2lnbmVkIGxvbmcg KmZyZXEsCj4+Pj4+PiAgICAgICAgIGRtY2ZyZXEtPnZvbHQgPSB0YXJnZXRfdm9sdDsKPj4+Pj4+ ICAgICBvdXQ6Cj4+Pj4+PiArICAgIHJvY2tjaGlwX3BtdV91bmJsb2NrKCk7Cj4+Pj4+PiArb3V0 X3VubG9jazoKPj4+Pj4+ICAgICAgICAgbXV0ZXhfdW5sb2NrKCZkbWNmcmVxLT5sb2NrKTsKPj4+ Pj4+ICAgICAgICAgcmV0dXJuIGVycjsKPj4+Pj4+ICAgICB9Cj4+Pj4+Cj4+Pj4+IEFja2VkLWJ5 OiBDaGFud29vIENob2kgPGN3MDAuY2hvaUBzYW1zdW5nLmNvbT4KPj4+Pgo+Pj4+IHNvIEkgZ3Vl c3MgeW91J3JlIG9rIHdpdGggbWUgcGlja2luZyB1cCBib3RoIHBhdGNoZXMsIHJpZ2h0Pwo+Pj4+ IFtKdXN0IG1ha2luZyBzdXJlIDotKSBdCj4+Pgo+Pj4gVGhpcyBwYXRjaCBoYXZlIHRoZSBkZXBl bmRlbmN5IG9mIGxhdGVzdCBkZXZmcmVxLW5leHQgYnJhbmNoLgo+Pj4gU28gdGhhdCBuZWVkIHRv IG1ha2UgdGhlIGltbXV0YWJsZSBicmFuY2ggYmV0d2VlbiByb2NrY2hpcCBhbmQgZGV2ZnJlcS4K Pj4+Cj4+Cj4+IEhpIEhlaWtvIGFuZCBCcmlhbiwKPj4KPj4gSXMgdGhlcmUgYW55IG90aGVyIHBy b2dyZXNzPwo+Pgo+PiBJTUhPLCBpZiByb2NrY2hpcCBtYWludGFpbmVyIHJlcGx5IHRoZSBhY2tl ZC1ieSBmcm9tIHBhdGNoMQo+PiBhbmQgdGhlbiBhZ3JlZSB0aGVzZSBwYXRjaGVzIHRvIGJlIGFw cGxpZWQgdG8gZGV2ZnJlcS5naXQsCj4+IEkgY2FuIHRha2UgdGhlbS4KPiAKPiBzb3VuZHMgZ29v ZCB0byBtZS4gUGF0Y2gxIGxvb2tzIGdvb2QgYW5kIGNvcnJlY3QgdG8gbWUsIHNvCj4gSSd2ZSBh ZGRlZCBhIFJldmlld2VkLWJ5IGZvciBpdCBhbmQgaXQgZGVmaW50aWx5IG1ha2VzIHNlbnNlIGZv cgo+IGJvdGggdG8gZ28gdGhyb3VnaCB0aGUgZGV2ZnJlcSB0cmVlIHRoZW4sIHNvIHdlIGRvbid0 IG5lZWQKPiBhZGRpdGlvbmFsIHN0YWJsZS1icmFuY2hlcyA6LSkKCk9LLiBJJ2xsIHRha2UgdGhl bSB3aXRoIHlvdXIgcmV2aWV3ZWQtYnkgdGFnLiBUaGFua3MuCgoKLS0gCkJlc3QgUmVnYXJkcywK U2Ftc3VuZyBFbGVjdHJvbmljcwpDaGFud29vIENob2kKCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0Cmxp bnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFk Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK