Am Dienstag, 30. Januar 2018, 21:28:35 CET schrieb Thierry Escande:
> From: zain wang <[email protected]>
> 
> The bridge does not need to be powered in analogix_dp_bind(), so
> remove the calls to pm_runtime_get()/phy_power_on()/analogix_dp_init_dp()
> as well as their power-off counterparts.
> 
> Cc: Stéphane Marchesin <[email protected]>
> Signed-off-by: zain wang <[email protected]>
> Signed-off-by: Caesar Wang <[email protected]>
> [the patch originally just removed the power_on portion, seanpaul removed
> the power off code as well as improved the commit message]
> Signed-off-by: Sean Paul <[email protected]>
> Signed-off-by: Thierry Escande <[email protected]>
> ---
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 10 ----------
>  1 file changed, 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index
> cb5e18d6ba04..1477ea9ba85d 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1382,11 +1382,6 @@ analogix_dp_bind(struct device *dev, struct
> drm_device *drm_dev,
> 
>       pm_runtime_enable(dev);
> 
> -     pm_runtime_get_sync(dev);
> -     phy_power_on(dp->phy);
> -
> -     analogix_dp_init_dp(dp);
> -
>       ret = devm_request_threaded_irq(&pdev->dev, dp->irq,
>                                       analogix_dp_hardirq,
>                                       analogix_dp_irq_thread,

Not 100% sure here, as the driver has the request-irq + disable-irq hack
here. So a pending interrupt could possibly fire between request and
disable.

Right now the block should be on, but can it still handle such an irq
when the power is removed?

So before removing the power here, we might want something
similar to what Marc posted for the vop [0] for the analogix-dp?


Heiko

[0] https://patchwork.kernel.org/patch/10210513/

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