Re: [Intel-gfx] [PATCH 06/13] drm/i915/pps: abstract intel_pps_vdd_off_sync

[Anshuman Gupta <anshuman.gupta@intel.com>]

On 2020-12-22 at 20:19:46 +0530, Jani Nikula wrote:
> Add a locked version of intel_pps_vdd_off_sync_unlocked() that does
> everything the callers expect it to.
> 
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c  | 31 +++---------------------
>  drivers/gpu/drm/i915/display/intel_pps.c | 17 ++++++++++++-
>  drivers/gpu/drm/i915/display/intel_pps.h |  2 +-
>  3 files changed, 20 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index f2794cc4292a..1a34c9351c30 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -5809,17 +5809,8 @@ void intel_dp_encoder_flush_work(struct drm_encoder *encoder)
>  	struct intel_dp *intel_dp = &dig_port->dp;
>  
>  	intel_dp_mst_encoder_cleanup(dig_port);
> -	if (intel_dp_is_edp(intel_dp)) {
> -		intel_wakeref_t wakeref;
>  
> -		cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
> -		/*
> -		 * vdd might still be enabled do to the delayed vdd off.
> -		 * Make sure vdd is actually turned off here.
> -		 */
> -		with_intel_pps_lock(intel_dp, wakeref)
> -			intel_pps_vdd_off_sync_unlocked(intel_dp);
> -	}
> +	intel_pps_vdd_off_sync(intel_dp);
>  
>  	intel_dp_aux_fini(intel_dp);
>  }
> @@ -5835,18 +5826,8 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
>  void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
>  {
>  	struct intel_dp *intel_dp = enc_to_intel_dp(intel_encoder);
> -	intel_wakeref_t wakeref;
> -
> -	if (!intel_dp_is_edp(intel_dp))
> -		return;
>  
> -	/*
> -	 * vdd might still be enabled do to the delayed vdd off.
> -	 * Make sure vdd is actually turned off here.
> -	 */
> -	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
> -	with_intel_pps_lock(intel_dp, wakeref)
> -		intel_pps_vdd_off_sync_unlocked(intel_dp);
> +	intel_pps_vdd_off_sync(intel_dp);
>  }
>  
>  void intel_dp_encoder_shutdown(struct intel_encoder *intel_encoder)
> @@ -6700,13 +6681,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
>  	return true;
>  
>  out_vdd_off:
> -	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
> -	/*
> -	 * vdd might still be enabled do to the delayed vdd off.
> -	 * Make sure vdd is actually turned off here.
> -	 */
> -	with_intel_pps_lock(intel_dp, wakeref)
> -		intel_pps_vdd_off_sync_unlocked(intel_dp);
> +	intel_pps_vdd_off_sync(intel_dp);
>  
>  	return false;
>  }
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c b/drivers/gpu/drm/i915/display/intel_pps.c
> index 01c9e69f4e3a..acd6d0092bc6 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.c
> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
> @@ -641,7 +641,7 @@ void intel_pps_vdd_on(struct intel_dp *intel_dp)
>  			dp_to_dig_port(intel_dp)->base.base.name);
>  }
>  
> -void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
> +static void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
>  {
>  	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>  	struct intel_digital_port *dig_port =
> @@ -682,6 +682,21 @@ void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
>  				fetch_and_zero(&intel_dp->vdd_wakeref));
>  }
>  
> +void intel_pps_vdd_off_sync(struct intel_dp *intel_dp)
> +{
> +	intel_wakeref_t wakeref;
> +	if (!intel_dp_is_edp(intel_dp))
> +		return;
> +
> +	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
> +	/*
> +	 * vdd might still be enabled do to the delayed vdd off.
	I belive there is a typo here "do -> due"
Thanks,
Anshuman.
> +	 * Make sure vdd is actually turned off here.
> +	 */
> +	with_intel_pps_lock(intel_dp, wakeref)
> +		intel_pps_vdd_off_sync_unlocked(intel_dp);
> +}
> +
>  void edp_panel_vdd_work(struct work_struct *__work)
>  {
>  	struct intel_dp *intel_dp =
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.h b/drivers/gpu/drm/i915/display/intel_pps.h
> index e7f0473be9a7..3cab183658c6 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.h
> +++ b/drivers/gpu/drm/i915/display/intel_pps.h
> @@ -29,7 +29,6 @@ void intel_pps_backlight_power(struct intel_connector *connector, bool enable);
>  
>  bool intel_pps_vdd_on_unlocked(struct intel_dp *intel_dp);
>  void intel_pps_vdd_off_unlocked(struct intel_dp *intel_dp, bool sync);
> -void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp);
>  void intel_pps_on_unlocked(struct intel_dp *intel_dp);
>  void intel_pps_off_unlocked(struct intel_dp *intel_dp);
>  void edp_panel_vdd_work(struct work_struct *__work);
> @@ -38,6 +37,7 @@ void intel_pps_vdd_sanitize(struct intel_dp *intel_dp);
>  void intel_pps_vdd_on(struct intel_dp *intel_dp);
>  void intel_pps_on(struct intel_dp *intel_dp);
>  void intel_pps_off(struct intel_dp *intel_dp);
> +void intel_pps_vdd_off_sync(struct intel_dp *intel_dp);
>  bool intel_pps_have_power(struct intel_dp *intel_dp);
>  
>  void wait_panel_power_cycle(struct intel_dp *intel_dp);
> -- 
> 2.20.1
> 
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