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/*
* Copyright (C) ST-Ericsson SA 2010
*
* ST-Ericsson MCDE base driver
*
* Author: Marcus Lorentzon <marcus.xm.lorentzon@stericsson.com>
* for ST-Ericsson.
*
* License terms: GNU General Public License (GPL), version 2.
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/stat.h>
#include <linux/time.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <asm/page.h>
#include "mcde_debugfs.h"
#define MAX_NUM_OVERLAYS 2
#define MAX_NUM_CHANNELS 4
#define DEFAULT_DMESG_FPS_LOG_INTERVAL 100
struct fps_info {
u32 enable_dmesg;
u32 interval_ms;
struct timespec timestamp_last;
u32 frame_counter_last;
u32 frame_counter;
u32 fpks;
};
struct overlay_info {
u8 id;
struct dentry *dentry;
struct fps_info fps;
};
struct channel_info {
u8 id;
struct dentry *dentry;
struct mcde_chnl_state *chnl;
struct fps_info fps;
struct overlay_info overlays[MAX_NUM_OVERLAYS];
};
static struct mcde_info {
struct device *dev;
struct dentry *dentry;
struct channel_info channels[MAX_NUM_CHANNELS];
} mcde;
/* Requires: lhs > rhs */
static inline u32 timespec_ms_diff(struct timespec lhs, struct timespec rhs)
{
struct timespec tmp_ts = timespec_sub(lhs, rhs);
u64 tmp_ns = (u64)timespec_to_ns(&tmp_ts);
do_div(tmp_ns, NSEC_PER_MSEC);
return (u32)tmp_ns;
}
/* Returns "frames per 1000 secs", divide by 1000 to get fps with 3 decimals */
static u32 update_fps(struct fps_info *fps)
{
struct timespec now;
u32 fpks = 0, ms_since_last, num_frames;
getrawmonotonic(&now);
fps->frame_counter++;
ms_since_last = timespec_ms_diff(now, fps->timestamp_last);
num_frames = fps->frame_counter - fps->frame_counter_last;
if (num_frames > 1 && ms_since_last >= fps->interval_ms) {
fpks = (num_frames * 1000000) / ms_since_last;
fps->timestamp_last = now;
fps->frame_counter_last = fps->frame_counter;
fps->fpks = fpks;
}
return fpks;
}
static void update_chnl_fps(struct channel_info *ci)
{
u32 fpks = update_fps(&ci->fps);
if (fpks && ci->fps.enable_dmesg)
dev_info(mcde.dev, "FPS: chnl=%d fps=%d.%.3d\n", ci->id,
fpks / 1000, fpks % 1000);
}
static void update_ovly_fps(struct channel_info *ci, struct overlay_info *oi)
{
u32 fpks = update_fps(&oi->fps);
if (fpks && oi->fps.enable_dmesg)
dev_info(mcde.dev, "FPS: ovly=%d.%d fps=%d.%.3d\n", ci->id,
oi->id, fpks / 1000, fpks % 1000);
}
int mcde_debugfs_create(struct device *dev)
{
if (mcde.dev)
return -EBUSY;
mcde.dentry = debugfs_create_dir("mcde", NULL);
if (!mcde.dentry)
return -ENOMEM;
mcde.dev = dev;
return 0;
}
static struct channel_info *find_chnl(u8 chnl_id)
{
if (chnl_id > MAX_NUM_CHANNELS)
return NULL;
return &mcde.channels[chnl_id];
}
static struct overlay_info *find_ovly(struct channel_info *ci, u8 ovly_id)
{
if (!ci || ovly_id >= MAX_NUM_OVERLAYS)
return NULL;
return &ci->overlays[ovly_id];
}
static void create_fps_files(struct dentry *dentry, struct fps_info *fps)
{
debugfs_create_u32("frame_counter", S_IRUGO, dentry,
&fps->frame_counter);
debugfs_create_u32("frames_per_ksecs", S_IRUGO, dentry, &fps->fpks);
debugfs_create_u32("interval_ms", S_IRUGO|S_IWUGO, dentry,
&fps->interval_ms);
debugfs_create_u32("dmesg", S_IRUGO|S_IWUGO, dentry,
&fps->enable_dmesg);
}
int mcde_debugfs_channel_create(u8 chnl_id, struct mcde_chnl_state *chnl)
{
struct channel_info *ci = find_chnl(chnl_id);
char name[10];
if (!chnl || !ci)
return -EINVAL;
if (ci->chnl)
return -EBUSY;
snprintf(name, sizeof(name), "chnl%d", chnl_id);
ci->dentry = debugfs_create_dir(name, mcde.dentry);
if (!ci->dentry)
return -ENOMEM;
create_fps_files(ci->dentry, &ci->fps);
ci->fps.interval_ms = DEFAULT_DMESG_FPS_LOG_INTERVAL;
ci->id = chnl_id;
ci->chnl = chnl;
return 0;
}
int mcde_debugfs_overlay_create(u8 chnl_id, u8 ovly_id)
{
struct channel_info *ci = find_chnl(chnl_id);
struct overlay_info *oi = find_ovly(ci, ovly_id);
char name[10];
if (!oi || !ci || ovly_id >= MAX_NUM_OVERLAYS)
return -EINVAL;
if (oi->dentry)
return -EBUSY;
snprintf(name, sizeof(name), "ovly%d", ovly_id);
oi->dentry = debugfs_create_dir(name, ci->dentry);
if (!oi->dentry)
return -ENOMEM;
create_fps_files(oi->dentry, &oi->fps);
oi->fps.interval_ms = DEFAULT_DMESG_FPS_LOG_INTERVAL;
oi->id = ovly_id;
return 0;
}
void mcde_debugfs_channel_update(u8 chnl_id)
{
struct channel_info *ci = find_chnl(chnl_id);
if (!ci || !ci->chnl)
return;
update_chnl_fps(ci);
}
void mcde_debugfs_overlay_update(u8 chnl_id, u8 ovly_id)
{
struct channel_info *ci = find_chnl(chnl_id);
struct overlay_info *oi = find_ovly(ci, ovly_id);
if (!oi || !oi->dentry)
return;
update_ovly_fps(ci, oi);
}
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