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a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1782938388; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jzH8cIjmzkaTbzxcez6NOL9lvuXAy29AjJiZHK2/mzw=; b=UMooT3WC3YZwbPvyoOa8L8tzBx/dhNGaKQMoZzUF8WTt9uWCu/0g7RxL5S0g0I5YfuvSgl Oz5Ps719Y/qvwaIE0gePP4DrNdSWqyiuboO3PKtmnXKBCDdGHOz2MFzp9gfOjl60UKDJKW Nb29BdQFmKt58EWfpP1RR2wsAMBN041viyzt8Vm6qhOfbfpfhP1TH16gXYuC/bolj4kZhD gD4ef0oxhJ0do/Qh+XHu70T1ABB8PSe/FT5RYTPWVikFvxGc1jXW+5GBTeuqiEijAzYsjW YTb1DxsZOSUySpBZ3fuESBRgPsV8q80o71nPbxBgnEgLQBixNmvcp2jtjpnGxQ== To: linux-pci@vger.kernel.org Cc: Marek Vasut , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Bjorn Helgaas , Catalin Marinas , Conor Dooley , Geert Uytterhoeven , Krzysztof Kozlowski , Lorenzo Pieralisi , Manivannan Sadhasivam , Marc Zyngier , Rob Herring , Yoshihiro Shimoda , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH v3 1/5] PCI: dwc: Determine whether iMSI is used before calling .init Date: Wed, 1 Jul 2026 22:37:44 +0200 Message-ID: <20260701203918.63189-2-marek.vasut+renesas@mailbox.org> In-Reply-To: <20260701203918.63189-1-marek.vasut+renesas@mailbox.org> References: <20260701203918.63189-1-marek.vasut+renesas@mailbox.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-MBO-RS-META: a1heqr496enipirpo7hddet7dcxqyciw X-MBO-RS-ID: 08b502b8c3826dfc338 X-Rspamd-Queue-Id: 4grBhj1pw6z8v1h The R-Car Gen4 PCIe controller integration configures MSI registers in the controller driver .init callback, because those registers have to be configured while PERST signal is asserted, and the PERST signal is asserted across the controller driver .init callback. The registers have to be configured differently in case the iMSI is or is not used. Assign pp->use_imsi_rx before the controller driver .init callback is called, so the controller driver .init callback implementation can use the pp->use_imsi_rx value. Signed-off-by: Marek Vasut --- Cc: "Krzysztof Wilczyński" Cc: Bjorn Helgaas Cc: Catalin Marinas Cc: Conor Dooley Cc: Geert Uytterhoeven Cc: Krzysztof Kozlowski Cc: Lorenzo Pieralisi Cc: Manivannan Sadhasivam Cc: Marc Zyngier Cc: Rob Herring Cc: Yoshihiro Shimoda Cc: devicetree@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org --- V3: New patch --- drivers/pci/controller/dwc/pcie-designware-host.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 06722259d2e37..f5a38e6fd8d79 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -587,6 +587,12 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) if (ret) return ret; + if (pci_msi_enabled()) { + pp->use_imsi_rx = !(pp->ops->msi_init || + of_property_present(np, "msi-parent") || + of_property_present(np, "msi-map")); + } + if (pp->ops->init) { ret = pp->ops->init(pp); if (ret) @@ -594,10 +600,6 @@ int dw_pcie_host_init(struct dw_pcie_rp *pp) } if (pci_msi_enabled()) { - pp->use_imsi_rx = !(pp->ops->msi_init || - of_property_present(np, "msi-parent") || - of_property_present(np, "msi-map")); - /* * For the use_imsi_rx case the default assignment is handled * in the dw_pcie_msi_host_init(). -- 2.53.0