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