[PATCH RESEND, v6 6/8] mailbox: mediatek: Add CMDQ secure mailbox driver

[CK Hu (胡俊光)]

Hi, Jason:

On Sun, 2024-05-26 at 22:44 +0800, Jason-JH.Lin wrote:
> To support secure video path feature, GCE have to read/write registgers
> in the secure world. GCE will enable the secure access permission to the
> HW who wants to access the secure content buffer.
> 
> Add CMDQ secure mailbox driver to make CMDQ client user is able to
> sending their HW settings to the secure world. So that GCE can execute
> all instructions to configure HW in the secure world.
> 
> TODO:
> 1. Squash cmdq_sec_task_exec_work() into cmdq_sec_mbox_send_data().
> 2. Call into TEE to query cookie instead of using shared memory in
>    cmdq_sec_get_cookie().
> 3. Register shared memory as command buffer instead of copying normal
>    command buffer to IWC shared memory.
> 4. Use SOFTDEP to make cmdq_sec_probe later than OPTEE loaded and then
>    move cmdq_sec_session_init into cmdq_sec_probe().
> 5. Remove timeout detection in cmdq_sec_session_send().
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin at mediatek.com>
> Signed-off-by: Hsiao Chien Sung <shawn.sung at mediatek.com>
> ---

[snip]

> +/**
> + * struct readback_engine - readback engine parameters.
> + * @engine: HW engine flag for readback.
> + * @start: start address pa of readback buffer.
> + * @count: u32 size count of readback buffer.
> + * @param: other parameters need in secure world.
> + */
> +struct readback_engine {
> +	u32 engine;
> +	u32 start;
> +	u32 count;
> +	u32 param;
> +};

Useless, so drop it.

Regards,
CK