Messages in this thread | | | From | Bin Meng <> | Date | Wed, 6 May 2020 13:33:26 +0800 | Subject | Re: [PATCH v3 1/2] arm: rpi: Add function to trigger VL805's firmware load |
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Hi Nicolas,
On Wed, May 6, 2020 at 12:26 AM Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote: > > On the Raspberry Pi 4, after a PCI reset, VL805's (a xHCI chip) firmware > may either be loaded directly from an EEPROM or, if not present, by the > SoC's VideCore (the SoC's co-processor). Introduce the function that > informs VideCore that VL805 may need its firmware loaded. >
I still did not get it. Without the firmware being loaded, does xHCI on RPi 4 still work? What exact functionality does the firmware provide?
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> > > --- > Changes since v2: > - Correct wrong function name in comment > - Add better comment on rpi_firmware_init_vl805() > > Changes since v1: > - Rename function so it's not mistaken with regular firmware loading > > arch/arm/mach-bcm283x/include/mach/mbox.h | 13 +++++++ > arch/arm/mach-bcm283x/include/mach/msg.h | 7 ++++ > arch/arm/mach-bcm283x/msg.c | 45 +++++++++++++++++++++++ > 3 files changed, 65 insertions(+) >
Regards, Bin
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