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Received: by smtp.zohomail.com with SMTPS id 1794403959576103.49384226317557; Wed, 11 Nov 2026 05:32:39 -0800 (PST) Message-ID: Date: Wed, 11 Nov 2026 14:32:34 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 7/9] phy: rockchip-samsung-dcphy: Support the new phy-type and direction binding To: Jason Yang , Vinod Koul , Neil Armstrong , Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Guochun Huang , Philipp Zabel Cc: Sebastian Reichel , Bryan O'Donoghue , linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org References: <20261110-dcphy-rx-v1-v6-0-d681ba20b36a@gmail.com> <20261110-dcphy-rx-v1-v6-7-d681ba20b36a@gmail.com> Content-Language: en-US From: Michael Riesch In-Reply-To: <20261110-dcphy-rx-v1-v6-7-d681ba20b36a@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ZohoMailClient: External X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261111_053247_466817_553DC9D1 X-CRM114-Status: GOOD ( 21.02 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-15.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hi Jason, Thanks for the patch! On 11/10/26 09:18, Jason Yang wrote: > The binding now selects the PHY with the cell and the mode of the block > with the phy-type property of the provider. Read phy-type in probe, > D-PHY by default. > > of_xlate() returns the transmitter for PHY_DIRECTION_TX. The deprecated > PHY_TYPE_DPHY and PHY_TYPE_CPHY select the transmitter as today, so > existing DTs are unaffected. > > A phy-type other than D-PHY or C-PHY fails probe. A deprecated cell > value that does not match phy-type gets a warning, and the transmitter > then refuses to power on, as in C-PHY mode today. > > Signed-off-by: Jason Yang Reviewed-by: Michael Riesch Best regards, Michael > --- > drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c | 32 ++++++++++++++++++----- > 1 file changed, 25 insertions(+), 7 deletions(-) > > diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c > index c40c84791eca..e8e229fc4856 100644 > --- a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c > +++ b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c > @@ -297,6 +297,7 @@ struct samsung_mipi_dcphy { > struct reset_control *grf_apb_rst; > struct samsung_mipi_phy tx; > u8 type; > + bool legacy_mismatch; > > const struct samsung_mipi_dcphy_plat_data *pdata; > struct { > @@ -1376,6 +1377,9 @@ static int samsung_mipi_dcphy_tx_power_on(struct phy *phy) > { > struct samsung_mipi_dcphy *samsung = phy_get_drvdata(phy); > > + if (samsung->legacy_mismatch) > + return -EOPNOTSUPP; > + > switch (samsung->type) { > case PHY_TYPE_DPHY: > return samsung_mipi_dphy_tx_power_on(samsung); > @@ -1549,13 +1553,21 @@ static struct phy *samsung_mipi_dcphy_xlate(struct device *dev, > return ERR_PTR(-EINVAL); > } > > - if (samsung->type != PHY_NONE && samsung->type != args->args[0]) > - dev_warn(dev, "phy type select %d overwriting type %d\n", > - args->args[0], samsung->type); > - > - samsung->type = args->args[0]; > - > - return samsung->tx.phy; > + switch (args->args[0]) { > + case PHY_DIRECTION_TX: > + return samsung->tx.phy; > + case PHY_TYPE_DPHY: > + case PHY_TYPE_CPHY: > + if (args->args[0] != samsung->type) { > + dev_warn(dev, "unsupported phy cell %u with phy-type %u\n", > + args->args[0], samsung->type); > + samsung->legacy_mismatch = true; > + } > + return samsung->tx.phy; > + default: > + dev_err(dev, "invalid phy cell %u\n", args->args[0]); > + return ERR_PTR(-EINVAL); > + } > } > > static int samsung_mipi_dcphy_probe(struct platform_device *pdev) > @@ -1566,6 +1578,7 @@ static int samsung_mipi_dcphy_probe(struct platform_device *pdev) > struct phy_provider *phy_provider; > struct resource *res; > void __iomem *regs; > + u32 type = PHY_TYPE_DPHY; > int ret; > > samsung = devm_kzalloc(dev, sizeof(*samsung), GFP_KERNEL); > @@ -1620,6 +1633,11 @@ static int samsung_mipi_dcphy_probe(struct platform_device *pdev) > return dev_err_probe(dev, PTR_ERR(samsung->grf_apb_rst), > "Failed to get system grf_apb_rst control\n"); > > + of_property_read_u32(np, "phy-type", &type); > + if (type != PHY_TYPE_DPHY && type != PHY_TYPE_CPHY) > + return dev_err_probe(dev, -EINVAL, "unsupported phy-type %u\n", type); > + samsung->type = type; > + > ret = devm_pm_runtime_enable(dev); > if (ret) > return dev_err_probe(dev, ret, "Failed to enable runtime PM\n"); >