From: Rob Herring <robh@kernel.org>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc: linux-arm-kernel@lists.infradead.org, f.fainelli@gmail.com,
Scott Branden <sbranden@broadcom.com>,
gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
tim.gover@raspberrypi.org, helgaas@kernel.org, wahrenst@gmx.net,
Ray Jui <rjui@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v8 2/4] firmware: raspberrypi: Introduce vl805 init routine
Date: Thu, 7 May 2020 16:48:59 -0500 [thread overview]
Message-ID: <20200507214859.GA562@bogus> (raw)
In-Reply-To: <20200505161318.26200-3-nsaenzjulienne@suse.de>
On Tue, 5 May 2020 18:13:15 +0200, Nicolas Saenz Julienne wrote:
> The Raspberry Pi 4 gets its USB functionality from VL805, a PCIe chip
> that implements xHCI. After a PCI reset, VL805's firmware may either be
> loaded directly from an EEPROM or, if not present, by the SoC's
> co-processor, VideoCore. RPi4's VideoCore OS contains both the non public
> firmware load logic and the VL805 firmware blob. The function this patch
> introduces triggers the aforementioned process.
>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> ---
>
> Change since v7:
> - Use usleep_delay()
> - Add comment about PCI errors
> - Don't wait on error
> - Typos
>
> Change since v6:
> - Add test to avoid loading the firmware when not needed
> - Since we have it around, print VL805's firmware version, it'll make
> debugging easier in the future
> - Correct typos
> - Add a clearer view of HW topology in patch description
>
> Changes since v4:
> - Inline function definition when RASPBERRYPI_FIRMWARE is not defined
>
> Changes since v1:
> - Move include into .c file and add forward declaration to .h
>
> drivers/firmware/raspberrypi.c | 61 ++++++++++++++++++++++
> include/soc/bcm2835/raspberrypi-firmware.h | 7 +++
> 2 files changed, 68 insertions(+)
>
Reviewed-by: Rob Herring <robh@kernel.org>
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next prev parent reply other threads:[~2020-05-07 21:49 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 16:13 [PATCH v8 0/4] USB: pci-quirks: Add Raspberry Pi 4 quirk Nicolas Saenz Julienne
2020-05-05 16:13 ` [PATCH v8 1/4] soc: bcm2835: Add notify xHCI reset property Nicolas Saenz Julienne
2020-05-07 21:48 ` Rob Herring
2020-05-05 16:13 ` [PATCH v8 2/4] firmware: raspberrypi: Introduce vl805 init routine Nicolas Saenz Julienne
2020-05-07 21:48 ` Rob Herring [this message]
2020-05-09 10:02 ` Stefan Wahren
2020-05-09 10:09 ` Stefan Wahren
2020-05-09 19:20 ` Nicolas Saenz Julienne
2020-05-05 16:13 ` [PATCH v8 3/4] PCI: brcmstb: Wait for Raspberry Pi's firmware when present Nicolas Saenz Julienne
2020-05-07 21:49 ` Rob Herring
2020-05-05 16:13 ` [PATCH v8 4/4] USB: pci-quirks: Add Raspberry Pi 4 quirk Nicolas Saenz Julienne
2020-05-07 21:52 ` Rob Herring
2020-05-11 14:25 ` Lorenzo Pieralisi
2020-05-13 7:05 ` Mathias Nyman
2020-06-02 10:05 ` Nicolas Saenz Julienne
2020-06-02 21:57 ` Florian Fainelli
2020-05-13 11:17 ` [PATCH v8 0/4] " Lorenzo Pieralisi
2020-05-13 11:26 ` Nicolas Saenz Julienne
2020-05-13 15:47 ` Lorenzo Pieralisi
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