[PATCH v4 5/8] mailbox: add MediaTek GPUEB IPI mailbox

[AngeloGioacchino Del Regno]

Il 23/09/25 13:39, Nicolas Frattaroli ha scritto:
> The MT8196 SoC uses an embedded MCU to control frequencies and power of
> the GPU. This controller is referred to as "GPUEB".
> 
> It communicates to the application processor, among other ways, through
> a mailbox.
> 
> The mailbox exposes one interrupt, which appears to only be fired when a
> response is received, rather than a transaction is completed. For us,
> this means we unfortunately need to poll for txdone.
> 
> The mailbox also requires the EB clock to be on when touching any of the
> mailbox registers.
> 
> Add a simple driver for it based on the common mailbox framework.
> 
> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli at collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>