[PATCH v20 2/9] drm: bridge: cadence: Update mhdp8546 mailbox access functions

[Dmitry Baryshkov]

On Tue, Dec 17, 2024 at 02:51:44PM +0800, Sandor Yu wrote:
> Basic mailbox access functions are removed, they are replaced by
> mailbox helper functions:
> - cdns_mhdp_mailbox_send()
> - cdns_mhdp_mailbox_send_recv()
> - cdns_mhdp_mailbox_send_recv_multi()
> - cdns_mhdp_secure_mailbox_send()
> - cdns_mhdp_secure_mailbox_send_recv()
> - cdns_mhdp_secure_mailbox_send_recv_multi()
> 
> All MHDP commands that need to be passed through the mailbox
> have been rewritten using these new helper functions.
> 
> Signed-off-by: Sandor Yu <Sandor.yu at nxp.com>
> ---
> v19->v20:
> - remove mhdp helper functions from the patch.
> 
> v18->v19:
> - Use guard(mutex)
> - Add kerneldocs for all new APIs.
> - Detail comments for mailbox access specific case.
> - Remove cdns_mhdp_dp_reg_write() because it is not needed by driver now.
> 
> v17->v18:
> - Create three ordinary mailbox access APIs
>     cdns_mhdp_mailbox_send
>     cdns_mhdp_mailbox_send_recv
>     cdns_mhdp_mailbox_send_recv_multi
> - Create three secure mailbox access APIs
>     cdns_mhdp_secure_mailbox_send
>     cdns_mhdp_secure_mailbox_send_recv
>     cdns_mhdp_secure_mailbox_send_recv_multi
> - MHDP8546 DP and HDCP commands that need access mailbox are rewrited
>   with above 6 API functions.
> 
> v16->v17:
> - Replaces the local mutex mbox_mutex with a global mutex mhdp_mailbox_mutex
> 
> v12->v16:
>  *No change.
> 
>  drivers/gpu/drm/bridge/cadence/Kconfig        |   1 +
>  .../drm/bridge/cadence/cdns-mhdp8546-core.c   | 487 +++---------------
>  .../drm/bridge/cadence/cdns-mhdp8546-core.h   |  47 +-
>  .../drm/bridge/cadence/cdns-mhdp8546-hdcp.c   | 212 +-------
>  .../drm/bridge/cadence/cdns-mhdp8546-hdcp.h   |  18 +-
>  5 files changed, 104 insertions(+), 661 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

-- 
With best wishes
Dmitry