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Wed, 13 Apr 2022 16:13:36 -0700 (PDT) Message-ID: <582e3645-b24e-356e-7f0f-0d37bb1e32e6@gmail.com> Date: Thu, 14 Apr 2022 08:13:32 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [RFC PATCH 2/2] PM / devfreq: rk3399_dmc: Block PMU during transitions Content-Language: en-US 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> From: Chanwoo Choi In-Reply-To: <3484357.R56niFO833@diego> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220413_161351_987493_0BF26699 X-CRM114-Status: GOOD ( 15.53 ) 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 T24gMjIuIDQuIDE0LiAwNzo0NSwgSGVpa28gU3TDvGJuZXIgd3JvdGU6Cj4gSGksCj4gCj4gQW0g RG9ubmVyc3RhZywgMTQuIEFwcmlsIDIwMjIsIDAwOjE0OjQwIENFU1Qgc2NocmllYiBDaGFud29v IENob2k6Cj4+IE9uIDIyLiA0LiA2LiAxMDo0OCwgQnJpYW4gTm9ycmlzIHdyb3RlOgo+Pj4gU2Vl IHRoZSBwcmV2aW91cyBwYXRjaCAoInNvYzogcm9ja2NoaXA6IHBvd2VyLWRvbWFpbjogTWFuYWdl IHJlc291cmNlCj4+PiBjb25mbGljdHMgd2l0aCBmaXJtd2FyZSIpIGZvciBhIHRob3JvdWdoIGV4 cGxhbmF0aW9uIG9mIHRoZSBjb25mbGljdHMuCj4+PiBXaGlsZSBBUk0gVHJ1c3RlZCBGaXJtd2Fy ZSBtYXkgYmUgbW9kaWZ5aW5nIG1lbW9yeSBjb250cm9sbGVyIGFuZAo+Pj4gcG93ZXItZG9tYWlu IHN0YXRlcywgd2UgbmVlZCB0byBibG9jayB0aGUga2VybmVsJ3MgcG93ZXItZG9tYWluIGRyaXZl ci4KPj4+Cj4+PiBJZiB0aGUgcG93ZXItZG9tYWluIGRyaXZlciBpcyBkaXNhYmxlZCwgdGhlcmUg aXMgbm8gcmVzb3VyY2UgY29uZmxpY3QKPj4+IGFuZCB0aGlzIGJlY29tZXMgYSBuby1vcC4KPj4+ Cj4+PiBTaWduZWQtb2ZmLWJ5OiBCcmlhbiBOb3JyaXMgPGJyaWFubm9ycmlzQGNocm9taXVtLm9y Zz4KPj4+IC0tLQo+Pj4KPj4+ICAgIGRyaXZlcnMvZGV2ZnJlcS9yazMzOTlfZG1jLmMgfCAxMyAr KysrKysrKysrKysrCj4+PiAgICAxIGZpbGUgY2hhbmdlZCwgMTMgaW5zZXJ0aW9ucygrKQo+Pj4K Pj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2RldmZyZXEvcmszMzk5X2RtYy5jIGIvZHJpdmVycy9k ZXZmcmVxL3JrMzM5OV9kbWMuYwo+Pj4gaW5kZXggZTQ5NGQxNDk3ZDYwLi5kYWZmNDA3MDI2MTUg MTAwNjQ0Cj4+PiAtLS0gYS9kcml2ZXJzL2RldmZyZXEvcmszMzk5X2RtYy5jCj4+PiArKysgYi9k cml2ZXJzL2RldmZyZXEvcmszMzk5X2RtYy5jCj4+PiBAQCAtMjEsNiArMjEsNyBAQAo+Pj4gICAg I2luY2x1ZGUgPGxpbnV4L3J3c2VtLmg+Cj4+PiAgICAjaW5jbHVkZSA8bGludXgvc3VzcGVuZC5o Pgo+Pj4gICAgCj4+PiArI2luY2x1ZGUgPHNvYy9yb2NrY2hpcC9wbV9kb21haW5zLmg+Cj4+PiAg ICAjaW5jbHVkZSA8c29jL3JvY2tjaGlwL3JrMzM5OV9ncmYuaD4KPj4+ICAgICNpbmNsdWRlIDxz b2Mvcm9ja2NoaXAvcm9ja2NoaXBfc2lwLmg+Cj4+PiAgICAKPj4+IEBAIC05Myw2ICs5NCwxNiBA QCBzdGF0aWMgaW50IHJrMzM5OV9kbWNmcmVxX3RhcmdldChzdHJ1Y3QgZGV2aWNlICpkZXYsIHVu c2lnbmVkIGxvbmcgKmZyZXEsCj4+PiAgICAKPj4+ICAgIAltdXRleF9sb2NrKCZkbWNmcmVxLT5s b2NrKTsKPj4+ICAgIAo+Pj4gKwkvKgo+Pj4gKwkgKiBFbnN1cmUgcG93ZXItZG9tYWluIHRyYW5z aXRpb25zIGRvbid0IGludGVyZmVyZSB3aXRoIEFSTSBUcnVzdGVkCj4+PiArCSAqIEZpcm13YXJl IHBvd2VyLWRvbWFpbiBpZGxpbmcuCj4+PiArCSAqLwo+Pj4gKwllcnIgPSByb2NrY2hpcF9wbXVf YmxvY2soKTsKPj4+ICsJaWYgKGVycikgewo+Pj4gKwkJZGV2X2VycihkZXYsICJGYWlsZWQgdG8g YmxvY2sgUE1VOiAlZFxuIiwgZXJyKTsKPj4+ICsJCWdvdG8gb3V0X3VubG9jazsKPj4+ICsJfQo+ Pj4gKwo+Pj4gICAgCS8qCj4+PiAgICAJICogU29tZSBpZGxlIHBhcmFtZXRlcnMgbWF5IGJlIGJh c2VkIG9uIHRoZSBERFIgY29udHJvbGxlciBjbG9jaywgd2hpY2gKPj4+ICAgIAkgKiBpcyBoYWxm IG9mIHRoZSBERFIgZnJlcXVlbmN5Lgo+Pj4gQEAgLTE5OCw2ICsyMDksOCBAQCBzdGF0aWMgaW50 IHJrMzM5OV9kbWNmcmVxX3RhcmdldChzdHJ1Y3QgZGV2aWNlICpkZXYsIHVuc2lnbmVkIGxvbmcg KmZyZXEsCj4+PiAgICAJZG1jZnJlcS0+dm9sdCA9IHRhcmdldF92b2x0Owo+Pj4gICAgCj4+PiAg ICBvdXQ6Cj4+PiArCXJvY2tjaGlwX3BtdV91bmJsb2NrKCk7Cj4+PiArb3V0X3VubG9jazoKPj4+ ICAgIAltdXRleF91bmxvY2soJmRtY2ZyZXEtPmxvY2spOwo+Pj4gICAgCXJldHVybiBlcnI7Cj4+ PiAgICB9Cj4+Cj4+IEFja2VkLWJ5OiBDaGFud29vIENob2kgPGN3MDAuY2hvaUBzYW1zdW5nLmNv bT4KPiAKPiBzbyBJIGd1ZXNzIHlvdSdyZSBvayB3aXRoIG1lIHBpY2tpbmcgdXAgYm90aCBwYXRj aGVzLCByaWdodD8KPiBbSnVzdCBtYWtpbmcgc3VyZSA6LSkgXQoKVGhpcyBwYXRjaCBoYXZlIHRo ZSBkZXBlbmRlbmN5IG9mIGxhdGVzdCBkZXZmcmVxLW5leHQgYnJhbmNoLgpTbyB0aGF0IG5lZWQg dG8gbWFrZSB0aGUgaW1tdXRhYmxlIGJyYW5jaCBiZXR3ZWVuIHJvY2tjaGlwIGFuZCBkZXZmcmVx LgoKLS0gCkJlc3QgUmVnYXJkcywKU2Ftc3VuZyBFbGVjdHJvbmljcwpDaGFud29vIENob2kKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1r ZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpo dHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJu ZWwK