[PATCH v2 15/24] drm/msm: dpu: Stop using encoder->crtc pointer

[Jeykumar Sankaran]

On 2018-11-16 10:42, Sean Paul wrote:
> From: Sean Paul <seanpaul at chromium.org>
> 
> It's for legacy drivers, for atomic drivers crtc->state->encoder_mask
> should be used to map encoder to crtc.
> 
> Changes in v2:
> - None
> 
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 46 ++++++++----------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  | 19 +++++++---
>  2 files changed, 29 insertions(+), 36 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index 156f4c77ca44..a008a87a8113 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -284,9 +284,9 @@ enum dpu_intf_mode dpu_crtc_get_intf_mode(struct
> drm_crtc *crtc)
>  		return INTF_MODE_NONE;
>  	}
> 
> -	drm_for_each_encoder(encoder, crtc->dev)
> -		if (encoder->crtc == crtc)
> -			return dpu_encoder_get_intf_mode(encoder);
> +	/* TODO: Returns the first INTF_MODE, could there be multiple
> values? */
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> crtc->state->encoder_mask)
> +		return dpu_encoder_get_intf_mode(encoder);
> 
>  	return INTF_MODE_NONE;
>  }
> @@ -551,13 +551,9 @@ static void dpu_crtc_atomic_begin(struct drm_crtc
> *crtc,
>  		spin_unlock_irqrestore(&dev->event_lock, flags);
>  	}
> 
> -	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
> {
> -		if (encoder->crtc != crtc)
> -			continue;
> -
> -		/* encoder will trigger pending mask now */
> +	/* encoder will trigger pending mask now */
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> crtc->state->encoder_mask)
>  		dpu_encoder_trigger_kickoff_pending(encoder);
> -	}
> 
>  	/*
>  	 * If no mixers have been allocated in dpu_crtc_atomic_check(),
> @@ -704,7 +700,6 @@ static int _dpu_crtc_wait_for_frame_done(struct
> drm_crtc *crtc)
>  void dpu_crtc_commit_kickoff(struct drm_crtc *crtc)
>  {
>  	struct drm_encoder *encoder;
> -	struct drm_device *dev = crtc->dev;
>  	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
>  	struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
>  	struct dpu_crtc_state *cstate = to_dpu_crtc_state(crtc->state);
> @@ -720,16 +715,13 @@ void dpu_crtc_commit_kickoff(struct drm_crtc 
> *crtc)
> 
>  	DPU_ATRACE_BEGIN("crtc_commit");
> 
> -	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
> {
> +	/*
> +	 * Encoder will flush/start now, unless it has a tx pending. If
> so, it
> +	 * may delay and flush at an irq event (e.g. ppdone)
> +	 */
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> +				  crtc->state->encoder_mask) {
>  		struct dpu_encoder_kickoff_params params = { 0 };
> -
> -		if (encoder->crtc != crtc)
> -			continue;
> -
> -		/*
> -		 * Encoder will flush/start now, unless it has a tx
> pending.
> -		 * If so, it may delay and flush at an irq event (e.g.
> ppdone)
> -		 */
>  		dpu_encoder_prepare_for_kickoff(encoder, &params);
>  	}
> 
> @@ -754,12 +746,8 @@ void dpu_crtc_commit_kickoff(struct drm_crtc 
> *crtc)
> 
>  	dpu_vbif_clear_errors(dpu_kms);
> 
> -	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
> {
> -		if (encoder->crtc != crtc)
> -			continue;
> -
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> crtc->state->encoder_mask)
>  		dpu_encoder_kickoff(encoder);
> -	}
We wont be holding the modeset locks here (and in crtc_atomic_begin) in 
the display thread. Is
it safe to iterate over encoder_mask?
> 
>  end:
>  	reinit_completion(&dpu_crtc->frame_done_comp);
> @@ -883,11 +871,8 @@ static void dpu_crtc_disable(struct drm_crtc 
> *crtc)
> 
>  	dpu_core_perf_crtc_update(crtc, 0, true);
> 
> -	drm_for_each_encoder(encoder, crtc->dev) {
> -		if (encoder->crtc != crtc)
> -			continue;
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> crtc->state->encoder_mask)
>  		dpu_encoder_register_frame_event_callback(encoder, NULL,
> NULL);
> -	}
> 
>  	memset(cstate->mixers, 0, sizeof(cstate->mixers));
>  	cstate->num_mixers = 0;
> @@ -922,12 +907,9 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
>  	DRM_DEBUG_KMS("crtc%d\n", crtc->base.id);
>  	dpu_crtc = to_dpu_crtc(crtc);
> 
> -	drm_for_each_encoder(encoder, crtc->dev) {
> -		if (encoder->crtc != crtc)
> -			continue;
> +	drm_for_each_encoder_mask(encoder, crtc->dev,
> crtc->state->encoder_mask)
>  		dpu_encoder_register_frame_event_callback(encoder,
>  				dpu_crtc_frame_event_cb, (void *)crtc);
> -	}
> 
>  	mutex_lock(&dpu_crtc->crtc_lock);
>  	trace_dpu_crtc_enable(DRMID(crtc), true, dpu_crtc);
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 1bec4540f3e1..64134d619748 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -320,7 +320,10 @@ static void dpu_kms_prepare_commit(struct msm_kms
> *kms,
>  	struct dpu_kms *dpu_kms;
>  	struct msm_drm_private *priv;
>  	struct drm_device *dev;
> +	struct drm_crtc *crtc;
> +	struct drm_crtc_state *crtc_state;
>  	struct drm_encoder *encoder;
> +	int i;
> 
>  	if (!kms)
>  		return;
> @@ -332,9 +335,13 @@ static void dpu_kms_prepare_commit(struct msm_kms
> *kms,
>  	priv = dev->dev_private;
>  	pm_runtime_get_sync(&dpu_kms->pdev->dev);
> 
> -	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
> -		if (encoder->crtc != NULL)
> +	/* Call prepare_commit for all affected encoders */
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
> +		drm_for_each_encoder_mask(encoder, crtc->dev,
> +					  crtc_state->encoder_mask) {
>  			dpu_encoder_prepare_commit(encoder);
> +		}
> +	}
>  }
> 
>  /*
> @@ -344,13 +351,17 @@ static void dpu_kms_prepare_commit(struct msm_kms
> *kms,
>  void dpu_kms_encoder_enable(struct drm_encoder *encoder)
>  {
>  	const struct drm_encoder_helper_funcs *funcs =
> encoder->helper_private;
> -	struct drm_crtc *crtc = encoder->crtc;
> +	struct drm_device *dev = encoder->dev;
> +	struct drm_crtc *crtc;
> 
>  	/* Forward this enable call to the commit hook */
>  	if (funcs && funcs->commit)
>  		funcs->commit(encoder);
> 
> -	if (crtc && crtc->state->active) {
> +	drm_for_each_crtc(crtc, dev) {
> +		if (!(crtc->state->encoder_mask &
> drm_encoder_mask(encoder)))
> +			continue;
> +
>  		trace_dpu_kms_enc_enable(DRMID(crtc));
>  		dpu_crtc_commit_kickoff(crtc);
>  	}

-- 
Jeykumar S