[U-Boot] [PATCH] ARM: bcm2835: use phys_to_bus() for mbox

Marek Vasut
2015-04-06T15:04:14Z

On Sunday, April 05, 2015 at 04:48:24 AM, Stephen Warren wrote:
> When we communicate with the VideoCore to perform property mailbox
> transactions, that is a DMA operation as far as the property buffer
> is concerned. Use phys_to_bus() on that buffer.
>
> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
> ---
> While this isn't USB-related, it does depend on patches that went into
> the USB topic/dwc2 tree. Either this can be merged there, or we'll have
> to wait until that branch is merged into u-boot/master and then merge
> this.
>
> As best I can tell, this is the last place we need to do this. SDHCI has
> potential but CONFIG_MMC_SDMA isn't set so I don't believe the code does
> any DMA. LCD has potential, but the VideoCore allocates the display
> surface, programs the display engine, and passes the surface's CPU pointer
> back to the CPU in a firmware message, of U-Boot isn't involved in setting
> up the DMA HW.
> ---
> arch/arm/cpu/arm1176/bcm2835/mbox.c | 5 +++--

I don't mind picking this up, but please rebase on top of u-boot/master,
which contains d6c418e4b8036038505ac67bf5d85a19ca2c650d .

Thanks!

Best regards,
Marek Vasut