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Wed, 9 Jul 2025 08:51:55 +0000 (GMT) From: "Pritam Manohar Sutar" To: "'Krzysztof Kozlowski'" Cc: , , , , , , , , , , , , , , , , , , , , , , In-Reply-To: <20250706-grouse-of-pastoral-bloom-7d79b0@krzk-bin> Subject: RE: [PATCH v4 3/6] dt-bindings: phy: samsung,usb3-drd-phy: add ExynosAutov920 combo HS phy Date: Wed, 9 Jul 2025 14:21:54 +0530 Message-ID: <07d401dbf0ae$bb0256b0$31070410$@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQJAgQZ9LFXBZrDskwNBYris6jFv1AJNRgOcAqL7pisBlv/N8LMsH/TA Content-Language: en-in X-CMS-MailID: 20250709085159epcas5p15cd74d4ab9d7944eef406ce118768a84 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20250701120002epcas5p2c4d728d599a819057bcc40b724881276 References: <20250701120706.2219355-1-pritam.sutar@samsung.com> <20250701120706.2219355-4-pritam.sutar@samsung.com> <20250706-grouse-of-pastoral-bloom-7d79b0@krzk-bin> Hi Krzysztof, > -----Original Message----- > From: Krzysztof Kozlowski > Sent: 06 July 2025 03:12 PM > To: Pritam Manohar Sutar > Cc: vkoul=40kernel.org; kishon=40kernel.org; robh=40kernel.org; > krzk+dt=40kernel.org; conor+dt=40kernel.org; alim.akhtar=40samsung.com; > andre.draszik=40linaro.org; peter.griffin=40linaro.org; neil.armstrong=40= linaro.org; > kauschluss=40disroot.org; ivo.ivanov.ivanov1=40gmail.com; > m.szyprowski=40samsung.com; s.nawrocki=40samsung.com; linux- > phy=40lists.infradead.org; devicetree=40vger.kernel.org; linux- > kernel=40vger.kernel.org; linux-arm-kernel=40lists.infradead.org; linux-s= amsung- > soc=40vger.kernel.org; rosa.pila=40samsung.com; dev.tailor=40samsung.com; > faraz.ata=40samsung.com; muhammed.ali=40samsung.com; > selvarasu.g=40samsung.com > Subject: Re: =5BPATCH v4 3/6=5D dt-bindings: phy: samsung,usb3-drd-phy: a= dd > ExynosAutov920 combo HS phy >=20 > On Tue, Jul 01, 2025 at 05:37:03PM +0530, Pritam Manohar Sutar wrote: > > This phy supports USB3.1 SSP+(10Gbps) protocol and is backwards >=20 > What is =22this=22? You add here HS PHY, so HS is 3.1? >=20 =22this=22 means =22combo phy=22. Combo phy is combination of 2 types of th= e phys.=20 1. one supports only USB3.1 SSP+ and denoted as =22samsung,exynosautov920-u= sb31drd-combo-ssphy=22 as in patch no 5 (combo SS phy) 2. another supports only USB2.0 HS and termed as =22samsung,exynosautov920-= usbdrd-combo-hsphy=22 as in this patch (combo HS phy) > If this is the same phy, why are you adding another compatible? As explained earlier (even in cover letter), there are 3 types of the phys = in this SoC. 1. one is simmilar with exynos850 and termed as =22samsung,exynosautov920-u= sbdrd-phy=22 as mentioned in patch no.1 2. two phys are in combo phys as explained above (patch no 3 =5Bcombo HS ph= y=5D and 5=5Bcombo SS phy=5D) =09 NOTE: hs phy in combo phy in =22NOT=22 same as phy (patch no. 1 which is si= milar with exynos850).=20 =09 These three phys (usbdrd-phy, combo-hsphy, combo-ssphy) are totally deferen= t =22NOT=22 same, hence added 3 three compatible for three phys. >=20 > Best regards, > Krzysztof