Re: [PATCH 0/2] pmdomain: imx93: Fix shared MIPI PHY resource management

[Ulf Hansson]

On Tue, Jun 9, 2026 at 8:24 AM Guoniu Zhou <guoniu.zhou@xxxxxxxxxxx> wrote:
>
> The i.MX93 MIPI DSI and CSI domains share control bits for clock and
> reset in the media block controller. This creates a resource conflict
> where one domain can inadvertently disable shared resources while the
> other domain is still active, leading to system instability.
>
> This series fixes the issue by introducing a dedicated MIPI PHY power
> domain that owns the shared clock and reset control bits. The DSI and
> CSI domains are then made subdomains of this PHY domain, ensuring proper
> reference counting and preventing premature resource shutdown.
>
> Tested on i.MX93 EVK with concurrent DSI and CSI operations.
>
> Signed-off-by: Guoniu Zhou <guoniu.zhou@xxxxxxxxxxx>

Both patches applied for fixes and by adding fixes/stable tag to
patch1 as well, thanks!

Kind regards
Uffe


> ---
> Guoniu Zhou (2):
>       dt-bindings: power: imx93: Add MIPI PHY power domain
>       pmdomain: imx93-blk-ctrl: Extract PHY as shared domain for DSI/CSI
>
>  drivers/pmdomain/imx/imx93-blk-ctrl.c       | 60 ++++++++++++++++++++++++++++-
>  include/dt-bindings/power/fsl,imx93-power.h |  1 +
>  2 files changed, 59 insertions(+), 2 deletions(-)
> ---
> base-commit: 3b7a18a34e8d3b14c7c926f033488a0350de9759
> change-id: 20260608-pm_imx93-6ccc1aa11932
>
> Best regards,
> --
> Guoniu Zhou <guoniu.zhou@xxxxxxxxxxx>
>