On 6/11/26 8:07 AM, Alexandre MINETTE via B4 Relay wrote:
> From: Alexandre MINETTE <[email protected]>
>
> MDP4 scanout continues to fetch framebuffer data while the CRTC is
> active. Keep the AXI/bus clock enabled for the lifetime of each active
> CRTC so that temporary MDP4 disable paths do not gate the bus clock
> while scanout is still running.
>
> This avoids display corruption seen on the Samsung Galaxy S4 when the
> display pipeline is active.
>
> Signed-off-by: Alexandre MINETTE <[email protected]>
> ---
[...]
> +void mdp4_crtc_bus_put(struct mdp4_kms *mdp4_kms)
> +{
> + mutex_lock(&mdp4_kms->clock_lock);
If you use guard(mutex)(&mdp4_kms->lock_lock), you can drop
the manual _unlock() calls (the lock will be dropped once you
exit the scope
Konrad
