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Tue, 19 Aug 2025 07:44:31 +0000 (GMT) From: "Pritam Manohar Sutar" To: "'Vinod Koul'" Cc: , , , , , , , , , , , , , , , , , , , , , In-Reply-To: Subject: RE: [PATCH v5 6/6] phy: exynos5-usbdrd: support SS combo phy for ExynosAutov920 Date: Tue, 19 Aug 2025 13:14:30 +0530 Message-ID: <003401dc10dd$1b39c560$51ad5020$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQJ+ZgWj3OwstM5ZbwFL0KmcSzrOlQGuc5yxAsdJ9S8B+nVVqAJlMeHKAknGxWeyy/PDQA== Content-Language: en-in X-CMS-MailID: 20250819074434epcas5p3aba12adc12ef9a64dceff0ba5ec62e4d 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: 20250805114323epcas5p39bf73c5e0a9382ff54b1832724804cc9 References: <20250805115216.3798121-1-pritam.sutar@samsung.com> <20250805115216.3798121-7-pritam.sutar@samsung.com> <038a01dc1013$900a2800$b01e7800$@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250819_011326_955496_0613B3D2 X-CRM114-Status: GOOD ( 20.85 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Vinod, > -----Original Message----- > From: Vinod Koul > Sent: 19 August 2025 12:25 PM > To: Pritam Manohar Sutar > Cc: kishon@kernel.org; robh@kernel.org; krzk+dt@kernel.org; > conor+dt@kernel.org; alim.akhtar@samsung.com; andre.draszik@linaro.org; > peter.griffin@linaro.org; kauschluss@disroot.org; > ivo.ivanov.ivanov1@gmail.com; igor.belwon@mentallysanemainliners.org; > m.szyprowski@samsung.com; s.nawrocki@samsung.com; linux- > phy@lists.infradead.org; devicetree@vger.kernel.org; linux- > kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-samsung- > soc@vger.kernel.org; rosa.pila@samsung.com; dev.tailor@samsung.com; > faraz.ata@samsung.com; muhammed.ali@samsung.com; > selvarasu.g@samsung.com > Subject: Re: [PATCH v5 6/6] phy: exynos5-usbdrd: support SS combo phy for > ExynosAutov920 > > On 18-08-25, 13:11, Pritam Manohar Sutar wrote: > > > > > + /* check cr_para_ack*/ > > > > + cnt = 0; > > > > + do { > > > > + /* > > > > + * data symbols are captured by phy on rising edge of the > > > > + * tx_clk when tx data enabled. > > > > + * completion of the write cycle is acknowledged by > > assertion > > > > + * of the cr_para_ack. > > > > + */ > > > > + exynosautov920_usb31drd_cr_clk(phy_drd, true); > > > > + reg = readl(reg_phy + > > > EXYNOSAUTOV920_USB31DRD_PHY_CR_PARA_CON0); > > > > + if ((reg & PHY_CR_PARA_CON0_PHY0_CR_PARA_ACK)) > > > > + break; > > > > + > > > > + exynosautov920_usb31drd_cr_clk(phy_drd, false); > > > > + > > > > + /* > > > > + * wait for minimum of 10 cr_para_clk cycles after phy reset > > > > + * is negated, before accessing control regs to allow for > > > > + * internal resets. > > > > + */ > > > > + cnt++; > > > > + } while (cnt < 10); > > > > + > > > > + if (cnt == 10) > > > > + dev_dbg(dev, "CR write failed to 0x%04x\n", addr); > > > > > > Not error? > > > > This is only for debugging purpose. It is not considered as error. > > Write failed is not an error? If this code is only for debug, pls drop it. Sure. will drop it. > > -- > ~Vinod Regards, Pritam