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Commit a16cf08c authored by raghavendra ambadas's avatar raghavendra ambadas
Browse files

msm: mdss: Add sysfs node for bl notification 



Add support for bl notification to userspace
using sysfs node for mdp3 driver. Change adds a
bl sysfs node for each framebuffer which will be
utilized to notify the clients.

Change-Id: I5fb57ae749196a5e4af8af08074e818a415c6dd3
Signed-off-by: default avatarRaghavendra Ambadas <rambad@codeaurora.org>
parent 82c22cba

drivers/video/msm/mdss/mdp3_ctrl.c

+26 −0
Original line number Diff line number Diff line
@@ -399,6 +399,22 @@ static int mdp3_ctrl_blit_req(struct msm_fb_data_type *mfd, void __user *p) 
	return rc;

}



static ssize_t mdp3_bl_show_event(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct fb_info *fbi = dev_get_drvdata(dev);

	struct msm_fb_data_type *mfd = (struct msm_fb_data_type *)fbi->par;

	struct mdp3_session_data *mdp3_session = NULL;

	int ret;



	if (!mfd || !mfd->mdp.private1)

		return -EAGAIN;



	mdp3_session = (struct mdp3_session_data *)mfd->mdp.private1;

	ret = scnprintf(buf, PAGE_SIZE, "%d\n", mdp3_session->bl_events);

	return ret;

}



static ssize_t mdp3_hist_show_event(struct device *dev,

		struct device_attribute *attr, char *buf)

{
@@ -505,6 +521,7 @@ static ssize_t mdp3_dyn_pu_store(struct device *dev, 
}



static DEVICE_ATTR(hist_event, S_IRUGO, mdp3_hist_show_event, NULL);

static DEVICE_ATTR(bl_event, S_IRUGO, mdp3_bl_show_event, NULL);

static DEVICE_ATTR(vsync_event, S_IRUGO, mdp3_vsync_show_event, NULL);

static DEVICE_ATTR(packpattern, S_IRUGO, mdp3_packpattern_show, NULL);

static DEVICE_ATTR(dyn_pu, S_IRUGO | S_IWUSR | S_IWGRP, mdp3_dyn_pu_show,
@@ -514,6 +531,7 @@ static struct attribute *generic_attrs[] = { 
	&dev_attr_packpattern.attr,

	&dev_attr_dyn_pu.attr,

	&dev_attr_hist_event.attr,

	&dev_attr_bl_event.attr,

	NULL,

};
@@ -2914,6 +2932,14 @@ int mdp3_ctrl_init(struct msm_fb_data_type *mfd) 
		goto init_done;

	}



	mdp3_session->bl_event_sd = sysfs_get_dirent(dev->kobj.sd,

							"bl_event");

	if (!mdp3_session->bl_event_sd) {

		pr_err("bl_event sysfs lookup failed\n");

		rc = -ENODEV;

		goto init_done;

	}



	rc = mdp3_create_sysfs_link(dev);

	if (rc)

		pr_warn("problem creating link to mdp sysfs\n");

drivers/video/msm/mdss/mdp3_ctrl.h

+2 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ struct mdp3_session_data { 
	struct timer_list vsync_timer;

	int vsync_period;

	struct kernfs_node *vsync_event_sd;

	struct kernfs_node *bl_event_sd;

	struct mdp_overlay overlay;

	struct mdp_overlay req_overlay;

	struct mdp3_buffer_queue bufq_in;
@@ -71,6 +72,7 @@ struct mdp3_session_data { 
	bool in_splash_screen;

	bool esd_recovery;

	int dyn_pu_state; /* dynamic partial update status */

	u32 bl_events;



	bool dma_active;

	struct completion dma_completion;

drivers/video/msm/mdss/mdss_fb.c

+12 −0
Original line number Diff line number Diff line
@@ -54,6 +54,7 @@ 
#include "mdss_debug.h"

#include "mdss_smmu.h"

#include "mdss_mdp.h"

#include "mdp3_ctrl.h"



#ifdef CONFIG_FB_MSM_TRIPLE_BUFFER

#define MDSS_FB_NUM 3
@@ -137,6 +138,9 @@ void mdss_fb_bl_update_notify(struct msm_fb_data_type *mfd, 
{

#ifndef TARGET_HW_MDSS_MDP3

	struct mdss_overlay_private *mdp5_data = NULL;

#endif

#ifdef TARGET_HW_MDSS_MDP3

	struct mdp3_session_data *mdp3_session = NULL;

#endif

	if (!mfd) {

		pr_err("%s mfd NULL\n", __func__);
@@ -175,6 +179,14 @@ void mdss_fb_bl_update_notify(struct msm_fb_data_type *mfd, 
		}

	}

#endif

#ifdef TARGET_HW_MDSS_MDP3

	mdp3_session = (struct mdp3_session_data *)mfd->mdp.private1;

	if (mdp3_session) {

		mdp3_session->bl_events++;

		sysfs_notify_dirent(mdp3_session->bl_event_sd);

		pr_debug("bl_event = %u\n", mdp3_session->bl_events);

	}

#endif

}



static int mdss_fb_notify_update(struct msm_fb_data_type *mfd,