On Mon, Jan 27, 2025 at 12:45:40AM +0530, Aradhya Bhatia wrote:
> From: Aradhya Bhatia <a-bhatia1@xxxxxx>
>
> The driver code doesn't have a Phy de-initialization path as yet, and so
> it does not clear the phy_initialized flag while suspending. This is a
> problem because after resume the driver looks at this flag to determine
> if a Phy re-initialization is required or not. It is in fact required
> because the hardware is resuming from a suspend, but the driver does not
> carry out any re-initialization causing the D-Phy to not work at all.
>
> Call the counterparts of phy_init() and phy_power_on(), that are
> phy_exit() and phy_power_off(), from _bridge_post_disable(), and clear
> the flags so that the Phy can be initialized again when required.
>
> Fixes: fced5a364dee ("drm/bridge: cdns: Convert to phy framework")
> Cc: Stable List <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Aradhya Bhatia <a-bhatia1@xxxxxx>
> Signed-off-by: Aradhya Bhatia <aradhya.bhatia@xxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
--
With best wishes
Dmitry
