[PATCH 2/3] drm/i915: Pass intel_display to the encoder suspend/shutdown helpers

[Jani Nikula]

On Mon, 17 Jun 2024, Imre Deak <imre.deak at intel.com> wrote:
> Pass intel_display to the encoder suspend/shutdown helpers instead of
> drm_i915_private for better isolation. This assumes that HAS_DISPLAY()
> will also take an intel_display parameter in the future (or that the
> HAS_DISPLAY() check will be moved to a caller of these functions).

You can already do that! HAS_DISPLAY() takes either i915 or display. So
maybe make that change now.

In the future, only display code should have HAS_DISPLAY() anyway, not
i915 or xe core. It's not an option that the caller does the checks.

>
> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_encoder.c | 22 +++++++++++---------
>  drivers/gpu/drm/i915/display/intel_encoder.h |  7 +++----
>  drivers/gpu/drm/i915/i915_driver.c           |  6 +++---
>  3 files changed, 18 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_encoder.c b/drivers/gpu/drm/i915/display/intel_encoder.c
> index 8a1dccb893a37..8e73d18a522d4 100644
> --- a/drivers/gpu/drm/i915/display/intel_encoder.c
> +++ b/drivers/gpu/drm/i915/display/intel_encoder.c
> @@ -38,8 +38,9 @@ void intel_encoder_link_check_queue_work(struct intel_encoder *encoder, int dela
>  			 &encoder->link_check_work, msecs_to_jiffies(delay_ms));
>  }
>  
> -void intel_encoder_suspend_all(struct drm_i915_private *i915)
> +void intel_encoder_suspend_all(struct intel_display *display)
>  {
> +	struct drm_i915_private *i915 = to_i915(display->drm);
>  	struct intel_encoder *encoder;
>  
>  	if (!HAS_DISPLAY(i915))
> @@ -49,19 +50,20 @@ void intel_encoder_suspend_all(struct drm_i915_private *i915)
>  	 * TODO: check and remove holding the modeset locks if none of
>  	 * the encoders depends on this.
>  	 */
> -	drm_modeset_lock_all(&i915->drm);
> -	for_each_intel_encoder(&i915->drm, encoder)
> +	drm_modeset_lock_all(display->drm);
> +	for_each_intel_encoder(display->drm, encoder)
>  		if (encoder->suspend)
>  			encoder->suspend(encoder);
> -	drm_modeset_unlock_all(&i915->drm);
> +	drm_modeset_unlock_all(display->drm);
>  
> -	for_each_intel_encoder(&i915->drm, encoder)
> +	for_each_intel_encoder(display->drm, encoder)
>  		if (encoder->suspend_complete)
>  			encoder->suspend_complete(encoder);
>  }
>  
> -void intel_encoder_shutdown_all(struct drm_i915_private *i915)
> +void intel_encoder_shutdown_all(struct intel_display *display)
>  {
> +	struct drm_i915_private *i915 = to_i915(display->drm);
>  	struct intel_encoder *encoder;
>  
>  	if (!HAS_DISPLAY(i915))
> @@ -71,13 +73,13 @@ void intel_encoder_shutdown_all(struct drm_i915_private *i915)
>  	 * TODO: check and remove holding the modeset locks if none of
>  	 * the encoders depends on this.
>  	 */
> -	drm_modeset_lock_all(&i915->drm);
> -	for_each_intel_encoder(&i915->drm, encoder)
> +	drm_modeset_lock_all(display->drm);
> +	for_each_intel_encoder(display->drm, encoder)
>  		if (encoder->shutdown)
>  			encoder->shutdown(encoder);
> -	drm_modeset_unlock_all(&i915->drm);
> +	drm_modeset_unlock_all(display->drm);
>  
> -	for_each_intel_encoder(&i915->drm, encoder)
> +	for_each_intel_encoder(display->drm, encoder)
>  		if (encoder->shutdown_complete)
>  			encoder->shutdown_complete(encoder);
>  }
> diff --git a/drivers/gpu/drm/i915/display/intel_encoder.h b/drivers/gpu/drm/i915/display/intel_encoder.h
> index e6cd74576f78e..3fa5589f0b1ce 100644
> --- a/drivers/gpu/drm/i915/display/intel_encoder.h
> +++ b/drivers/gpu/drm/i915/display/intel_encoder.h
> @@ -6,8 +6,7 @@
>  #ifndef __INTEL_ENCODER_H__
>  #define __INTEL_ENCODER_H__
>  
> -struct drm_i915_private;
> -

Ah, this is why you missed the superfluous space. ;)

BR,
Jani.

> +struct intel_display;
>  struct intel_encoder;
>  
>  void intel_encoder_link_check_init(struct intel_encoder *encoder,
> @@ -15,7 +14,7 @@ void intel_encoder_link_check_init(struct intel_encoder *encoder,
>  void intel_encoder_link_check_queue_work(struct intel_encoder *encoder, int delay_ms);
>  void intel_encoder_link_check_flush_work(struct intel_encoder *encoder);
>  
> -void intel_encoder_suspend_all(struct drm_i915_private *i915);
> -void intel_encoder_shutdown_all(struct drm_i915_private *i915);
> +void intel_encoder_suspend_all(struct intel_display *display);
> +void intel_encoder_shutdown_all(struct intel_display *display);
>  
>  #endif /* __INTEL_ENCODER_H__ */
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index e9e38ed246f66..fb8e9c2fcea53 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -956,8 +956,8 @@ void i915_driver_shutdown(struct drm_i915_private *i915)
>  	if (HAS_DISPLAY(i915))
>  		intel_display_driver_suspend_access(i915);
>  
> -	intel_encoder_suspend_all(i915);
> -	intel_encoder_shutdown_all(i915);
> +	intel_encoder_suspend_all(&i915->display);
> +	intel_encoder_shutdown_all(&i915->display);
>  
>  	intel_dmc_suspend(i915);
>  
> @@ -1040,7 +1040,7 @@ static int i915_drm_suspend(struct drm_device *dev)
>  	if (HAS_DISPLAY(dev_priv))
>  		intel_display_driver_suspend_access(dev_priv);
>  
> -	intel_encoder_suspend_all(dev_priv);
> +	intel_encoder_suspend_all(&dev_priv->display);
>  
>  	/* Must be called before GGTT is suspended. */
>  	intel_dpt_suspend(dev_priv);

-- 
Jani Nikula, Intel