kernel 5.7.8

1 files changed, 57 insertions, 0 deletions

diff --git a/SOURCES/0001-PCI-brcmstb-Wait-for-Raspberry-Pi-s-firmware-when-pr.patch b/SOURCES/0001-PCI-brcmstb-Wait-for-Raspberry-Pi-s-firmware-when-pr.patch
new file mode 100644
index 0000000..07f8b4e
--- /dev/null
+++ b/SOURCES/0001-PCI-brcmstb-Wait-for-Raspberry-Pi-s-firmware-when-pr.patch
@@ -0,0 +1,57 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+Date: Tue, 10 Mar 2020 13:52:41 +0100
+Subject: [PATCH] PCI: brcmstb: Wait for Raspberry Pi's firmware when present
+
+xHCI's PCI fixup, run at the end of pcie-brcmstb's probe, depends on
+RPi4's VideoCore firmware interface to be up and running. It's possible
+for both initializations to race, so make sure it's available prior to
+starting.
+
+Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+---
+ drivers/pci/controller/pcie-brcmstb.c | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
+index 6d79d14527a6..aee84679a997 100644
+--- a/drivers/pci/controller/pcie-brcmstb.c
++++ b/drivers/pci/controller/pcie-brcmstb.c
+@@ -28,6 +28,8 @@
+ #include <linux/string.h>
+ #include <linux/types.h>
+
++#include <soc/bcm2835/raspberrypi-firmware.h>
++
+ #include "../pci.h"
+
+ /* BRCM_PCIE_CAP_REGS - Offset for the mandatory capability config regs */
+@@ -917,11 +919,24 @@ static int brcm_pcie_probe(struct platform_device *pdev)
+ {
+ 	struct device_node *np = pdev->dev.of_node, *msi_np;
+ 	struct pci_host_bridge *bridge;
++	struct device_node *fw_np;
+ 	struct brcm_pcie *pcie;
+ 	struct pci_bus *child;
+ 	struct resource *res;
+ 	int ret;
+
++	/*
++	 * We have to wait for the Raspberry Pi's firmware interface to be up
++	 * as some PCI fixups depend on it.
++	 */
++	fw_np = of_find_compatible_node(NULL, NULL,
++					"raspberrypi,bcm2835-firmware");
++	if (fw_np && !rpi_firmware_get(fw_np)) {
++		of_node_put(fw_np);
++		return -EPROBE_DEFER;
++	}
++	of_node_put(fw_np);
++
+ 	bridge = devm_pci_alloc_host_bridge(&pdev->dev, sizeof(*pcie));
+ 	if (!bridge)
+ 		return -ENOMEM;
+-- 
+2.26.2
+