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Commit 6761d7b8 authored by Karthik Anantha Ram's avatar Karthik Anantha Ram Committed by Gerrit - the friendly Code Review server
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msm: camera: cpas: Change to enable bus scaling for AHB 



This change scales BW voting with src clock voltage corner.
Adds a debugfs to disable this scaling.

CRs-Fixed: 2531856
Change-Id: I266e34ca81f635954e60648366bcc4792f90fdb6
Signed-off-by: default avatarKarthik Anantha Ram <kartanan@codeaurora.org>
parent 2424e342

drivers/cam_cpas/cam_cpas_hw.c

+5 −4
Original line number Diff line number Diff line
@@ -932,7 +932,7 @@ static int cam_cpas_util_apply_client_ahb_vote(struct cam_hw_info *cpas_hw, 


	CAM_DBG(CAM_CPAS, "Required highest_level[%d]", highest_level);



	if (cpas_core->ahb_bus_scaling_enable) {

	if (!cpas_core->ahb_bus_scaling_disable) {

		rc = cam_cpas_util_vote_bus_client_level(ahb_bus_client,

			highest_level);

		if (rc) {
@@ -1678,12 +1678,12 @@ static int cam_cpas_util_create_debugfs( 
	if (!cpas_core->dentry)

		return -ENOMEM;



	if (!debugfs_create_bool("ahb_bus_scaling_enable",

	if (!debugfs_create_bool("ahb_bus_scaling_disable",

		0644,

		cpas_core->dentry,

		&cpas_core->ahb_bus_scaling_enable)) {

		&cpas_core->ahb_bus_scaling_disable)) {

		CAM_ERR(CAM_CPAS,

			"failed to create ahb_bus_scaling_enable entry");

			"failed to create ahb_bus_scaling_disable entry");

		rc = -ENOMEM;

		goto err;

	}
@@ -1735,6 +1735,7 @@ int cam_cpas_hw_probe(struct platform_device *pdev, 
	cpas_hw->soc_info.dev = &pdev->dev;

	cpas_hw->soc_info.dev_name = pdev->name;

	cpas_hw->open_count = 0;

	cpas_core->ahb_bus_scaling_disable = false;

	mutex_init(&cpas_hw->hw_mutex);

	spin_lock_init(&cpas_hw->hw_lock);

	init_completion(&cpas_hw->hw_complete);

drivers/cam_cpas/cam_cpas_hw.h

+2 −2
Original line number Diff line number Diff line
@@ -184,7 +184,7 @@ struct cam_cpas_axi_port { 
 * @irq_count: atomic irq count

 * @irq_count_wq: wait variable to ensure all irq's are handled

 * @dentry: debugfs file entry

 * @ahb_bus_scaling_enable: ahb scaling based on src clk corner for bus

 * @ahb_bus_scaling_disable: ahb scaling based on src clk corner for bus

 */

struct cam_cpas {

	struct cam_cpas_hw_caps hw_caps;
@@ -203,7 +203,7 @@ struct cam_cpas { 
	atomic_t irq_count;

	wait_queue_head_t irq_count_wq;

	struct dentry *dentry;

	bool ahb_bus_scaling_enable;

	bool ahb_bus_scaling_disable;

};



int cam_camsstop_get_internal_ops(struct cam_cpas_internal_ops *internal_ops);