Re: [PATCH 07/14] drm/msm/dpu: iterate for assigned hw ctl in virtual encoder

[Sean Paul <sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org>]

On Tue, Aug 28, 2018 at 05:39:56PM -0700, Jeykumar Sankaran wrote:
> Instead of iterating for hw ctrl per physical encoder, this
> patch moves the iterations and assignment to the virtual encoder.
> 

Missing "Changes in" section as well as _why_ you're doing this in your
description.

> Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c        | 22 +++++++++++++++++++---
>  .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c   | 19 -------------------
>  .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c   | 19 -------------------
>  3 files changed, 19 insertions(+), 41 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index b223bd2..dbf669e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1011,9 +1011,10 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
>  	struct dpu_kms *dpu_kms;
>  	struct list_head *connector_list;
>  	struct drm_connector *conn = NULL, *conn_iter;
> -	struct dpu_rm_hw_iter pp_iter;
> +	struct dpu_rm_hw_iter pp_iter, ctl_iter;
>  	struct msm_display_topology topology;
>  	enum dpu_rm_topology_name topology_name;
> +	struct dpu_hw_ctl *hw_ctl[MAX_CHANNELS_PER_ENC] = { NULL };
>  	int i = 0, ret;
>  
>  	if (!drm_enc) {
> @@ -1061,17 +1062,32 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
>  		dpu_enc->hw_pp[i] = (struct dpu_hw_pingpong *) pp_iter.hw;
>  	}
>  
> +	dpu_rm_init_hw_iter(&ctl_iter, drm_enc->base.id, DPU_HW_BLK_CTL);
> +	for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
> +		if (!dpu_rm_get_hw(&dpu_kms->rm, &ctl_iter))
> +			break;
> +		hw_ctl[i] = (struct dpu_hw_ctl *)ctl_iter.hw;
> +	}
> +
>  	topology_name = dpu_rm_get_topology_name(topology);
>  	for (i = 0; i < dpu_enc->num_phys_encs; i++) {
>  		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
>  
>  		if (phys) {
>  			if (!dpu_enc->hw_pp[i]) {
> -				DPU_ERROR_ENC(dpu_enc,
> -				    "invalid pingpong block for the encoder\n");
> +				DPU_ERROR_ENC(dpu_enc, "no pp block assigned"
> +					     "at idx: %d\n", i);
>  				return;
>  			}
>  			phys->hw_pp = dpu_enc->hw_pp[i];
> +
> +			if (!hw_ctl[i]) {

Should you check this before you assign hw_pp?

> +				DPU_ERROR_ENC(dpu_enc, "no ctl block assigned"
> +					     "at idx: %d\n", i);
> +				return;
> +			}
> +			phys->hw_ctl = hw_ctl[i];
> +
>  			phys->connector = conn->state->connector;
>  			phys->topology_name = topology_name;
>  			if (phys->ops.mode_set)
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> index c8c4612..5c89868 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> @@ -196,9 +196,6 @@ static void dpu_encoder_phys_cmd_mode_set(
>  {
>  	struct dpu_encoder_phys_cmd *cmd_enc =
>  		to_dpu_encoder_phys_cmd(phys_enc);
> -	struct dpu_rm *rm = &phys_enc->dpu_kms->rm;
> -	struct dpu_rm_hw_iter iter;
> -	int i, instance;
>  
>  	if (!phys_enc || !mode || !adj_mode) {
>  		DPU_ERROR("invalid args\n");
> @@ -208,22 +205,6 @@ static void dpu_encoder_phys_cmd_mode_set(
>  	DPU_DEBUG_CMDENC(cmd_enc, "caching mode:\n");
>  	drm_mode_debug_printmodeline(adj_mode);
>  
> -	instance = phys_enc->split_role == ENC_ROLE_SLAVE ? 1 : 0;
> -
> -	/* Retrieve previously allocated HW Resources. Shouldn't fail */
> -	dpu_rm_init_hw_iter(&iter, phys_enc->parent->base.id, DPU_HW_BLK_CTL);
> -	for (i = 0; i <= instance; i++) {
> -		if (dpu_rm_get_hw(rm, &iter))
> -			phys_enc->hw_ctl = (struct dpu_hw_ctl *)iter.hw;
> -	}
> -
> -	if (IS_ERR_OR_NULL(phys_enc->hw_ctl)) {
> -		DPU_ERROR_CMDENC(cmd_enc, "failed to init ctl: %ld\n",
> -				PTR_ERR(phys_enc->hw_ctl));
> -		phys_enc->hw_ctl = NULL;
> -		return;
> -	}
> -
>  	_dpu_encoder_phys_cmd_setup_irq_hw_idx(phys_enc);
>  }
>  
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> index ecb8c65..ca0963c 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
> @@ -395,9 +395,6 @@ static void dpu_encoder_phys_vid_mode_set(
>  		struct drm_display_mode *mode,
>  		struct drm_display_mode *adj_mode)
>  {
> -	struct dpu_rm *rm;
> -	struct dpu_rm_hw_iter iter;
> -	int i, instance;
>  	struct dpu_encoder_phys_vid *vid_enc;
>  
>  	if (!phys_enc || !phys_enc->dpu_kms) {
> @@ -405,7 +402,6 @@ static void dpu_encoder_phys_vid_mode_set(
>  		return;
>  	}
>  
> -	rm = &phys_enc->dpu_kms->rm;
>  	vid_enc = to_dpu_encoder_phys_vid(phys_enc);
>  
>  	if (adj_mode) {
> @@ -414,21 +410,6 @@ static void dpu_encoder_phys_vid_mode_set(
>  		DPU_DEBUG_VIDENC(vid_enc, "caching mode:\n");
>  	}
>  
> -	instance = phys_enc->split_role == ENC_ROLE_SLAVE ? 1 : 0;
> -
> -	/* Retrieve previously allocated HW Resources. Shouldn't fail */
> -	dpu_rm_init_hw_iter(&iter, phys_enc->parent->base.id, DPU_HW_BLK_CTL);
> -	for (i = 0; i <= instance; i++) {
> -		if (dpu_rm_get_hw(rm, &iter))
> -			phys_enc->hw_ctl = (struct dpu_hw_ctl *)iter.hw;
> -	}
> -	if (IS_ERR_OR_NULL(phys_enc->hw_ctl)) {
> -		DPU_ERROR_VIDENC(vid_enc, "failed to init ctl, %ld\n",
> -				PTR_ERR(phys_enc->hw_ctl));
> -		phys_enc->hw_ctl = NULL;
> -		return;
> -	}
> -
>  	_dpu_encoder_phys_vid_setup_irq_hw_idx(phys_enc);
>  }
>  
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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