PS3 AV/FB updates

@@ -32,6 +32,8 @@
 #include <linux/ioctl.h>
 #include <linux/notifier.h>
 #include <linux/reboot.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
 
 #include <asm/uaccess.h>
 #include <linux/fb.h>

@@ -129,7 +131,6 @@ struct ps3fb_priv {
 	u64 context_handle, memory_handle;
 	void *xdr_ea;
 	struct gpu_driver_info *dinfo;
-	struct semaphore sem;
 	u32 res_index;
 
 	u64 vblank_count;	/* frame count */

@@ -139,6 +140,8 @@ struct ps3fb_priv {
 	atomic_t ext_flip;	/* on/off flip with vsync */
 	atomic_t f_count;	/* fb_open count */
 	int is_blanked;
+	int is_kicked;
+	struct task_struct *task;
 };
 static struct ps3fb_priv ps3fb;
 

@@ -805,11 +808,14 @@ static int ps3fb_ioctl(struct fb_info *i
 
 static int ps3fbd(void *arg)
 {
-	daemonize("ps3fbd");
-	for (;;) {
-		down(&ps3fb.sem);
-		if (atomic_read(&ps3fb.ext_flip) == 0)
+	while (!kthread_should_stop()) {
+		try_to_freeze();
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (ps3fb.is_kicked) {
+			ps3fb.is_kicked = 0;
 			ps3fb_sync(0);	/* single buffer */
+		}
+		schedule();
 	}
 	return 0;
 }

@@ -830,8 +836,11 @@ static irqreturn_t ps3fb_vsync_interrupt
 	if (v1 & (1 << GPU_INTR_STATUS_VSYNC_1)) {
 		/* VSYNC */
 		ps3fb.vblank_count = head->vblank_count;
-		if (!ps3fb.is_blanked)
-			up(&ps3fb.sem);
+		if (ps3fb.task && !ps3fb.is_blanked &&
+		    !atomic_read(&ps3fb.ext_flip)) {
+			ps3fb.is_kicked = 1;
+			wake_up_process(ps3fb.task);
+		}
 		wake_up_interruptible(&ps3fb.wait_vsync);
 	}
 

@@ -968,6 +977,7 @@ static int __init ps3fb_probe(struct pla
 	u64 xdr_lpar;
 	int status;
 	unsigned long offset;
+	struct task_struct *task;
 
 	/* get gpu context handle */
 	status = lv1_gpu_memory_allocate(DDR_SIZE, 0, 0, 0, 0,

@@ -1050,9 +1060,18 @@ static int __init ps3fb_probe(struct pla
 	       "fb%d: PS3 frame buffer device, using %ld KiB of video memory\n",
 	       info->node, ps3fb_videomemory.size >> 10);
 
-	kernel_thread(ps3fbd, info, CLONE_KERNEL);
+	task = kthread_run(ps3fbd, info, "ps3fbd");
+	if (IS_ERR(task)) {
+		retval = PTR_ERR(task);
+		goto err_unregister_framebuffer;
+	}
+
+	ps3fb.task = task;
+
 	return 0;
 
+err_unregister_framebuffer:
+	unregister_framebuffer(info);
 err_fb_dealloc:
 	fb_dealloc_cmap(&info->cmap);
 err_framebuffer_release:

@@ -1083,6 +1102,11 @@ void ps3fb_cleanup(void)
 {
 	int status;
 
+	if (ps3fb.task) {
+		struct task_struct *task = ps3fb.task;
+		ps3fb.task = NULL;
+		kthread_stop(task);
+	}
 	if (ps3fb.irq_no) {
 		free_irq(ps3fb.irq_no, ps3fb.dev);
 		ps3_free_irq(ps3fb.irq_no);

@@ -1195,7 +1219,6 @@ static int __init ps3fb_init(void)
 
 	atomic_set(&ps3fb.f_count, -1);	/* fbcon opens ps3fb */
 	atomic_set(&ps3fb.ext_flip, 0);	/* for flip with vsync */
-	init_MUTEX(&ps3fb.sem);
 	init_waitqueue_head(&ps3fb.wait_vsync);
 	ps3fb.num_frames = 1;
 

@@ -680,13 +680,10 @@ EXPORT_SYMBOL_GPL(ps3fb_wait_for_vsync);
 
 void ps3fb_flip_ctl(int on)
 {
-	if (on) {
-		if (atomic_read(&ps3fb.ext_flip) > 0) {
-			atomic_dec(&ps3fb.ext_flip);
-		}
-	} else {
+	if (on)
+		atomic_dec_if_positive(&ps3fb.ext_flip);
+	else
 		atomic_inc(&ps3fb.ext_flip);
-	}
 }
 
 EXPORT_SYMBOL_GPL(ps3fb_flip_ctl);

@@ -786,8 +783,7 @@ static int ps3fb_ioctl(struct fb_info *i
 
 	case PS3FB_IOCTL_OFF:
 		DPRINTK("PS3FB_IOCTL_OFF:\n");
-		if (atomic_read(&ps3fb.ext_flip) > 0)
-			atomic_dec(&ps3fb.ext_flip);
+		atomic_dec_if_positive(&ps3fb.ext_flip);
 		retval = 0;
 		break;
 

@@ -440,7 +440,7 @@ static int ps3av_set_videomode(void)
 	ps3av_set_av_video_mute(PS3AV_CMD_MUTE_ON);
 
 	/* wake up ps3avd to do the actual video mode setting */
-	up(&ps3av.ping);
+	queue_work(ps3av.wq, &ps3av.work);
 
 	return 0;
 }

@@ -515,18 +515,10 @@ static void ps3av_set_videomode_cont(u32
 	ps3av_set_av_video_mute(PS3AV_CMD_MUTE_OFF);
 }
 
-static int ps3avd(void *p)
+static void ps3avd(struct work_struct *work)
 {
-	struct ps3av *info = p;
-
-	daemonize("ps3avd");
-	while (1) {
-		down(&info->ping);
-		ps3av_set_videomode_cont(info->ps3av_mode,
-					 info->ps3av_mode_old);
-		up(&info->pong);
-	}
-	return 0;
+	ps3av_set_videomode_cont(ps3av.ps3av_mode, ps3av.ps3av_mode_old);
+	complete(&ps3av.done);
 }
 
 static int ps3av_vid2table_id(int vid)

@@ -725,7 +717,7 @@ int ps3av_set_video_mode(u32 id, int boo
 	}
 
 	/* set videomode */
-	down(&ps3av.pong);
+	wait_for_completion(&ps3av.done);
 	ps3av.ps3av_mode_old = ps3av.ps3av_mode;
 	ps3av.ps3av_mode = id;
 	if (ps3av_set_videomode())

@@ -881,12 +873,16 @@ static int ps3av_probe(struct ps3_vuart_
 	memset(&ps3av, 0, sizeof(ps3av));
 
 	init_MUTEX(&ps3av.sem);
-	init_MUTEX_LOCKED(&ps3av.ping);
-	init_MUTEX(&ps3av.pong);
 	mutex_init(&ps3av.mutex);
 	ps3av.ps3av_mode = 0;
 	ps3av.dev = dev;
-	kernel_thread(ps3avd, &ps3av, CLONE_KERNEL);
+
+	INIT_WORK(&ps3av.work, ps3avd);
+	init_completion(&ps3av.done);
+	complete(&ps3av.done);
+	ps3av.wq = create_singlethread_workqueue("ps3avd");
+	if (!ps3av.wq)
+		return -ENOMEM;
 
 	ps3av.available = 1;
 	switch (ps3_os_area_get_av_multi_out()) {

@@ -926,6 +922,8 @@ static int ps3av_remove(struct ps3_vuart
 {
 	if (ps3av.available) {
 		ps3av_cmd_fin();
+		if (ps3av.wq)
+			destroy_workqueue(ps3av.wq);
 		ps3av.available = 0;
 	}
 

@@ -646,8 +646,9 @@ struct ps3av_pkt_avb_param {
 struct ps3av {
 	int available;
 	struct semaphore sem;
-	struct semaphore ping;
-	struct semaphore pong;
+	struct work_struct work;
+	struct completion done;
+	struct workqueue_struct *wq;
 	struct mutex mutex;
 	int open_count;
 	struct ps3_vuart_port_device *dev;

@@ -297,10 +297,10 @@ static const struct fb_videomode ps3fb_m
 #define VP_OFF(i)	(WIDTH(i) * Y_OFF(i) * BPP + X_OFF(i) * BPP)
 #define FB_OFF(i)	(GPU_OFFSET - VP_OFF(i) % GPU_OFFSET)
 
-static int ps3fb_mode = 0;
+static int ps3fb_mode;
 module_param(ps3fb_mode, bool, 0);
 
-static char *mode_option __initdata = NULL;
+static char *mode_option __initdata;
 
 
 static int ps3fb_get_res_table(u32 xres, u32 yres)

@@ -38,7 +38,24 @@
 static int timeout = 5000;	/* in msec ( 5 sec ) */
 module_param(timeout, int, 0644);
 
-static struct ps3av ps3av;
+static struct ps3av {
+	int available;
+	struct mutex mutex;
+	struct work_struct work;
+	struct completion done;
+	struct workqueue_struct *wq;
+	int open_count;
+	struct ps3_vuart_port_device *dev;
+
+	int region;
+	struct ps3av_pkt_av_get_hw_conf av_hw_conf;
+	u32 av_port[PS3AV_AV_PORT_MAX + PS3AV_OPT_PORT_MAX];
+	u32 opt_port[PS3AV_OPT_PORT_MAX];
+	u32 head[PS3AV_HEAD_MAX];
+	u32 audio_port;
+	int ps3av_mode;
+	int ps3av_mode_old;
+} ps3av;
 
 static struct ps3_vuart_port_device ps3av_dev = {
 	.match_id = PS3_MATCH_ID_AV_SETTINGS

@@ -250,7 +267,7 @@ int ps3av_do_pkt(u32 cid, u16 send_len, 
 		 struct ps3av_send_hdr *buf)
 {
 	int res = 0;
-	union {
+	static union {
 		struct ps3av_reply_hdr reply_hdr;
 		u8 raw[PS3AV_BUF_SIZE];
 	} recv_buf;

@@ -259,8 +276,7 @@ int ps3av_do_pkt(u32 cid, u16 send_len, 
 
 	BUG_ON(!ps3av.available);
 
-	if (down_interruptible(&ps3av.sem))
-		return -ERESTARTSYS;
+	mutex_lock(&ps3av.mutex);
 
 	table = ps3av_search_cmd_table(cid, PS3AV_CID_MASK);
 	BUG_ON(!table);

@@ -290,11 +306,11 @@ int ps3av_do_pkt(u32 cid, u16 send_len, 
 		goto err;
 	}
 
-	up(&ps3av.sem);
+	mutex_unlock(&ps3av.mutex);
 	return 0;
 
       err:
-	up(&ps3av.sem);
+	mutex_unlock(&ps3av.mutex);
 	printk(KERN_ERR "%s: failed cid:%x res:%d\n", __FUNCTION__, cid, res);
 	return res;
 }

@@ -872,7 +888,6 @@ static int ps3av_probe(struct ps3_vuart_
 
 	memset(&ps3av, 0, sizeof(ps3av));
 
-	init_MUTEX(&ps3av.sem);
 	mutex_init(&ps3av.mutex);
 	ps3av.ps3av_mode = 0;
 	ps3av.dev = dev;

@@ -18,8 +18,6 @@
 #ifndef _ASM_POWERPC_PS3AV_H_
 #define _ASM_POWERPC_PS3AV_H_
 
-#include <linux/mutex.h>
-
 /** command for ioctl() **/
 #define PS3AV_VERSION 0x205	/* version of ps3av command */
 

@@ -643,25 +641,6 @@ struct ps3av_pkt_avb_param {
 	u8 buf[PS3AV_PKT_AVB_PARAM_MAX_BUF_SIZE];
 };
 
-struct ps3av {
-	int available;
-	struct semaphore sem;
-	struct work_struct work;
-	struct completion done;
-	struct workqueue_struct *wq;
-	struct mutex mutex;
-	int open_count;
-	struct ps3_vuart_port_device *dev;
-
-	int region;
-	struct ps3av_pkt_av_get_hw_conf av_hw_conf;
-	u32 av_port[PS3AV_AV_PORT_MAX + PS3AV_OPT_PORT_MAX];
-	u32 opt_port[PS3AV_OPT_PORT_MAX];
-	u32 head[PS3AV_HEAD_MAX];
-	u32 audio_port;
-	int ps3av_mode;
-	int ps3av_mode_old;
-};
 
 /** command status **/
 #define PS3AV_STATUS_SUCCESS			0x0000	/* success */

@@ -719,6 +698,7 @@ static inline void ps3av_cmd_av_monitor_
 extern int ps3av_cmd_video_get_monitor_info(struct ps3av_pkt_av_get_monitor_info *,
 					    u32);
 
+struct ps3_vuart_port_device;
 extern int ps3av_vuart_write(struct ps3_vuart_port_device *dev,
 			     const void *buf, unsigned long size);
 extern int ps3av_vuart_read(struct ps3_vuart_port_device *dev, void *buf,