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Commit d926057c authored by Vishalsingh Hajeri's avatar Vishalsingh Hajeri
Browse files

msm: camera: vfe: Update logic to set axi bandwidth vote 



Apply bandwidth update by finding max bw request in
last few frames.

Change-Id: I46dd6fa299f34d833e7fb07971aa558737436acb
Signed-off-by: default avatarVishalsingh Hajeri <vhajeri@codeaurora.org>
parent afd29190

drivers/media/platform/msm/camera/cam_isp/isp_hw_mgr/isp_hw/vfe_hw/vfe_top/cam_vfe_top_ver2.c

+48 −57
Original line number Diff line number Diff line
@@ -34,11 +34,12 @@ struct cam_vfe_top_ver2_priv { 
	struct cam_vfe_top_ver2_common_data common_data;

	struct cam_isp_resource_node        mux_rsrc[CAM_VFE_TOP_VER2_MUX_MAX];

	unsigned long                       hw_clk_rate;

	struct cam_axi_vote                 to_be_applied_axi_vote;

	struct cam_axi_vote                 applied_axi_vote;

	uint32_t                            counter_to_update_axi_vote;

	struct cam_axi_vote             req_axi_vote[CAM_VFE_TOP_VER2_MUX_MAX];

	unsigned long                   req_clk_rate[CAM_VFE_TOP_VER2_MUX_MAX];

	struct cam_axi_vote             last_vote[CAM_VFE_TOP_VER2_MUX_MAX *

					CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES];

	uint32_t                        last_counter;

	enum cam_vfe_bw_control_action

		axi_vote_control[CAM_VFE_TOP_VER2_MUX_MAX];

};
@@ -128,6 +129,7 @@ static int cam_vfe_top_set_axi_bw_vote( 
	bool start_stop)

{

	struct cam_axi_vote sum = {0, 0};

	struct cam_axi_vote to_be_applied_axi_vote = {0, 0};

	int i, rc = 0;

	struct cam_hw_soc_info   *soc_info =

		top_priv->common_data.soc_info;
@@ -156,6 +158,11 @@ static int cam_vfe_top_set_axi_bw_vote( 
		sum.uncompressed_bw,

		sum.compressed_bw);



	top_priv->last_vote[top_priv->last_counter] = sum;

	top_priv->last_counter = (top_priv->last_counter + 1) %

		(CAM_VFE_TOP_VER2_MUX_MAX *

		CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES);



	if ((top_priv->applied_axi_vote.uncompressed_bw ==

		sum.uncompressed_bw) &&

		(top_priv->applied_axi_vote.compressed_bw ==
@@ -163,77 +170,60 @@ static int cam_vfe_top_set_axi_bw_vote( 
		CAM_DBG(CAM_ISP, "BW config unchanged %llu %llu",

			top_priv->applied_axi_vote.uncompressed_bw,

			top_priv->applied_axi_vote.compressed_bw);

		top_priv->counter_to_update_axi_vote = 0;

		return 0;

	}



	if ((top_priv->to_be_applied_axi_vote.uncompressed_bw !=

		sum.uncompressed_bw) ||

		(top_priv->to_be_applied_axi_vote.compressed_bw !=

		sum.compressed_bw)) {

		// we got a new bw value to apply

		top_priv->counter_to_update_axi_vote = 0;



		top_priv->to_be_applied_axi_vote.uncompressed_bw =

			sum.uncompressed_bw;

		top_priv->to_be_applied_axi_vote.compressed_bw =

			sum.compressed_bw;

	}



	if (start_stop == true) {

		CAM_DBG(CAM_ISP,

			"New bw in start/stop, applying bw now, counter=%d",

			top_priv->counter_to_update_axi_vote);

		top_priv->counter_to_update_axi_vote = 0;

		apply_bw_update = true;

	} else if ((top_priv->to_be_applied_axi_vote.uncompressed_bw <

		top_priv->applied_axi_vote.uncompressed_bw) ||

		(top_priv->to_be_applied_axi_vote.compressed_bw <

		top_priv->applied_axi_vote.compressed_bw)) {

		if (top_priv->counter_to_update_axi_vote >=

		/* need to vote current request immediately */

		to_be_applied_axi_vote = sum;

		/* Reset everything, we can start afresh */

		memset(top_priv->last_vote, 0x0, sizeof(struct cam_axi_vote) *

			(CAM_VFE_TOP_VER2_MUX_MAX *

			CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES)) {

			CAM_DBG(CAM_ISP,

				"New bw is less, applying bw now, counter=%d",

				top_priv->counter_to_update_axi_vote);

			top_priv->counter_to_update_axi_vote = 0;

			apply_bw_update = true;

			CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES));

		top_priv->last_counter = 0;

		top_priv->last_vote[top_priv->last_counter] = sum;

		top_priv->last_counter = (top_priv->last_counter + 1) %

			(CAM_VFE_TOP_VER2_MUX_MAX *

			CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES);

	} else {

			CAM_DBG(CAM_ISP,

				"New bw is less, Defer applying bw, counter=%d",

				top_priv->counter_to_update_axi_vote);

		/*

		 * Find max bw request in last few frames. This will the bw

		 *that we want to vote to CPAS now.

		 */

		for (i = 0; i < (CAM_VFE_TOP_VER2_MUX_MAX *

			CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES); i++) {

			if (to_be_applied_axi_vote.compressed_bw <

				top_priv->last_vote[i].compressed_bw)

				to_be_applied_axi_vote.compressed_bw =

					top_priv->last_vote[i].compressed_bw;



			top_priv->counter_to_update_axi_vote++;

			apply_bw_update = false;

			if (to_be_applied_axi_vote.uncompressed_bw <

				top_priv->last_vote[i].uncompressed_bw)

				to_be_applied_axi_vote.uncompressed_bw =

					top_priv->last_vote[i].uncompressed_bw;

		}

	} else {

		CAM_DBG(CAM_ISP,

			"New bw is more, applying bw now, counter=%d",

			top_priv->counter_to_update_axi_vote);

		top_priv->counter_to_update_axi_vote = 0;

		apply_bw_update = true;

	}



	CAM_DBG(CAM_ISP,

		"counter=%d, apply_bw_update=%d",

		top_priv->counter_to_update_axi_vote,

		apply_bw_update);

	if ((to_be_applied_axi_vote.uncompressed_bw !=

		top_priv->applied_axi_vote.uncompressed_bw) ||

		(to_be_applied_axi_vote.compressed_bw !=

		top_priv->applied_axi_vote.compressed_bw))

		apply_bw_update = true;



	CAM_DBG(CAM_ISP, "apply_bw_update=%d", apply_bw_update);



	if (apply_bw_update == true) {

		rc = cam_cpas_update_axi_vote(

			soc_private->cpas_handle,

			&top_priv->to_be_applied_axi_vote);

			&to_be_applied_axi_vote);

		if (!rc) {

			top_priv->applied_axi_vote.uncompressed_bw =

				top_priv->

			to_be_applied_axi_vote.uncompressed_bw;

			top_priv->applied_axi_vote.compressed_bw =

				top_priv->

				to_be_applied_axi_vote.compressed_bw;

		} else {

			CAM_ERR(CAM_ISP, "BW request failed, rc=%d", rc);

		}

		top_priv->counter_to_update_axi_vote = 0;

	}



	return rc;
@@ -706,11 +696,12 @@ int cam_vfe_top_ver2_init( 
	}

	vfe_top->top_priv = top_priv;

	top_priv->hw_clk_rate = 0;

	top_priv->to_be_applied_axi_vote.compressed_bw = 0;

	top_priv->to_be_applied_axi_vote.uncompressed_bw = 0;

	top_priv->applied_axi_vote.compressed_bw = 0;

	top_priv->applied_axi_vote.uncompressed_bw = 0;

	top_priv->counter_to_update_axi_vote = 0;

	memset(top_priv->last_vote, 0x0, sizeof(struct cam_axi_vote) *

		(CAM_VFE_TOP_VER2_MUX_MAX *

		CAM_VFE_DELAY_BW_REDUCTION_NUM_FRAMES));

	top_priv->last_counter = 0;



	for (i = 0, j = 0; i < CAM_VFE_TOP_VER2_MUX_MAX; i++) {

		top_priv->mux_rsrc[i].res_type = CAM_ISP_RESOURCE_VFE_IN;