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Sat, 22 May 2021 12:30:23 +0000 From: "Peng Fan (OSS)" To: Adam Ford CC: "Peng Fan (OSS)" , Rob Herring , Shawn Guo , Sascha Hauer , Sascha Hauer , Fabio Estevam , dl-linux-imx , Philipp Zabel , Lucas Stach , Krzysztof Kozlowski , =?iso-8859-1?Q?Guido_G=FCnther?= , Marek Vasut , Andrey Smirnov , devicetree , arm-soc , Linux Kernel Mailing List , Jacky Bai , Schrempf Frieder , Abel Vesa Subject: RE: [PATCH V5 0/4] soc: imx: add i.MX BLK-CTL support Thread-Topic: [PATCH V5 0/4] soc: imx: add i.MX BLK-CTL support Thread-Index: AQHXTivYvjigSv6Ln0ykHSUT474sdqruEhmAgACa4hCAABwLAIAApodQ Date: Sat, 22 May 2021 12:30:22 +0000 Message-ID: References: <20210521105919.20167-1-peng.fan@oss.nxp.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: gmail.com; dkim=none (message not signed) header.d=none;gmail.com; dmarc=none action=none header.from=oss.nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [92.121.68.129] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 719f034e-651f-49ca-cf33-08d91d1d5ebc x-ms-traffictypediagnostic: DB7PR04MB5083: x-ms-exchange-sharedmailbox-routingagent-processed: True x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5516; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > Subject: Re: [PATCH V5 0/4] soc: imx: add i.MX BLK-CTL support > > On Fri, May 21, 2021 at 7:54 PM Peng Fan wrote: > > > > > Subject: Re: [PATCH V5 0/4] soc: imx: add i.MX BLK-CTL support > > > > > > On Fri, May 21, 2021 at 5:27 AM Peng Fan (OSS) > > > > > > wrote: > > > > > > > > From: Peng Fan > > > > > > > > V5: > > > > Rework the blk-ctl driver to let sub-PGC use blk-ctl as parent > > > > power domain to fix the potential handshake issue. > > > > I still keep R-b/A-b tag for Patch 1,2,4, since very minor > > > > changes I only drop R-b tag for Patch 3, since it has big change. > > > > An example, the pgc_mipi not take pgc_dispmix as parent: > > > > > > > > pgc_dispmix: power-domain@10 { > > > > #power-domain-cells = <0>; > > > > reg = ; > > > > clocks = <&clk IMX8MM_CLK_DISP_ROOT>, > > > > <&clk IMX8MM_CLK_DISP_AXI_ROOT>, > > > > <&clk > IMX8MM_CLK_DISP_APB_ROOT>; > > > > }; > > > > > > > > pgc_mipi: power-domain@11 { > > > > #power-domain-cells = <0>; > > > > reg = ; > > > > power-domains = <&dispmix_blk_ctl > > > > IMX8MM_BLK_CTL_PD_DISPMIX_BUS>; > > > > > > With this change, I get a bunch of errors on boot. The list of > > > power-domains appear correct on the surface, but it also has trouble > waking from sleep. > > > > > > [ 0.695947] imx8mm-blk-ctl imx-dispmix-blk-ctl.0: invalid resource > > > [ 0.702849] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.0 failed > > > with error -22 > > > [ 0.711259] imx8mm-blk-ctl imx-dispmix-blk-ctl.1: invalid resource > > > [ 0.716451] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.1 failed > > > with error -22 > > > [ 0.724856] imx8mm-blk-ctl imx-dispmix-blk-ctl.2: invalid resource > > > [ 0.730097] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.2 failed > > > with error -22 > > > [ 0.738398] imx8mm-blk-ctl imx-dispmix-blk-ctl.3: invalid resource > > > [ 0.743747] imx8mm-blk-ctl: probe of imx-dispmix-blk-ctl.3 failed > > > with error -22 > > > > It is just the imx8mm-blk-ctl driver matches with the new created > > child device, because the child device points the of_node of the > > parent device. > > But this error will not affect functionality. > > I'll resolve this issue and send out v6. > > > > > > If I have a wrong device tree configuration, can you please post an > > > updated device tree? I don't think an official patch for original > > > pgc's were pushed as part of either series. I used this e-mail as the patch > to enable the blk-ctl. > > > > Do you have an device tree, I could give a look. > > I have a git repo where I've been collecting the various power domain patches. > I have updated the imx8mn blk-ctl and device trees as well in that same repo. I put my dts diff here: https://gist.github.com/MrVan/d73888d8273c43ea4a3b28fa668ca1d0 Not include vpu, lcdif, mipi, just gpc and blk-ctl. Your dts has error, the vpu-g1/g2/h1 should use vpu-blk as parent power domain. And the vpu-blk-ctl power domain changes as below: power-domain-names = "vpumix", "vpu-g1", "vpu-g2", "vpu-h1"; Regards, Peng. > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub. > com%2Faford173%2Flinux%2Fblob%2Flinux-5.13.y-aford%2Farch%2Farm64% > 2Fboot%2Fdts%2Ffreescale%2Fimx8mm.dtsi&data=04%7C01%7Cpeng.f > an%40nxp.com%7Ca5c04b8b13514290944008d91cc9d95f%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C637572475532314749%7CUnknown > %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha > WwiLCJXVCI6Mn0%3D%7C1000&sdata=NjxeojlrUc5t1tmrpZrhmYL1jaGB > QNHv8QVh2OcgMpA%3D&reserved=0 > > thanks for looking at this. > > adam > > > > Regards, > > Peng. > > > > > > > > thanks, > > > > > > adam > > > > > > > }; > > > > > > > > dispmix_blk_ctl: clock-controller@32e28000 { > > > > compatible = "fsl,imx8mm-dispmix-blk-ctl", > "syscon"; > > > > reg = <0x32e28000 0x100>; > > > > #power-domain-cells = <1>; > > > > power-domains = <&pgc_dispmix>, <&pgc_mipi>; > > > > power-domain-names = "dispmix", "mipi"; > > > > clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk > > > IMX8MM_CLK_DISP_AXI_ROOT>, > > > > <&clk > IMX8MM_CLK_DISP_APB_ROOT>; > > > > }; > > > > > > > > V4: > > > > Add R-b tag > > > > Typo fix > > > > Update the power domain macro names Per Abel and Frieder > > > > > > > > V3: > > > > Add explaination for not listing items in patch 2 commit log Per Rob. > > > > Addressed comments from Lucas and Frieder on patch [3,4]. > > > > A few comments from Jacky was ignored, because following gpcv2 > > > > coding style. > > > > > > > > V2: > > > > Fix yaml check failure. > > > > > > > > Previously there is an effort from Abel that take BLK-CTL as clock > > > > provider, but it turns out that there is A/B lock issue and we are > > > > not able resolve that. > > > > > > > > Per discuss with Lucas and Jacky, we made an agreement that take > > > > BLK-CTL as a power domain provider and use GPC's domain as parent, > > > > the consumer node take BLK-CTL as power domain input. > > > > > > > > This patchset has been tested on i.MX8MM EVK board, but one hack > > > > is not included in the patchset is that the DISPMIX BLK-CTL > > > > MIPI_M/S_RESET not implemented. Per Lucas, we will finally have a > > > > MIPI DPHY driver, so fine to leave it. > > > > > > > > Thanks for Lucas's suggestion, Frieder Schrempf for collecting all > > > > the patches, Abel's previous BLK-CTL work, Jacky Bai on help debug > issues. > > > > > > > > > > > > Peng Fan (4): > > > > dt-bindings: power: Add defines for i.MX8MM BLK-CTL power > domains > > > > Documentation: bindings: clk: Add bindings for i.MX BLK_CTL > > > > soc: imx: Add generic blk-ctl driver > > > > soc: imx: Add blk-ctl driver for i.MX8MM > > > > > > > > .../bindings/soc/imx/fsl,imx-blk-ctl.yaml | 66 ++++ > > > > drivers/soc/imx/Makefile | 2 +- > > > > drivers/soc/imx/blk-ctl-imx8mm.c | 139 ++++++++ > > > > drivers/soc/imx/blk-ctl.c | 311 > > > ++++++++++++++++++ > > > > drivers/soc/imx/blk-ctl.h | 85 +++++ > > > > include/dt-bindings/power/imx8mm-power.h | 13 + > > > > 6 files changed, 615 insertions(+), 1 deletion(-) create mode > > > > 100644 > > > > Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml > > > > create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c create > mode > > > > 100644 drivers/soc/imx/blk-ctl.c create mode 100644 > > > > drivers/soc/imx/blk-ctl.h > > > > > > > > -- > > > > 2.30.0 > > > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel