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Commit dfc0fd8d authored by Tomi Valkeinen's avatar Tomi Valkeinen
Browse files

OMAP: DSS2: Collect interrupt statistics 



Collect interrupt statistics, printable via debugfs:

debugfs/omapdss/dispc_irq
debugfs/omapdss/dsi_irq

The counters are reset when printed.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@nokia.com>
parent ff90a348

drivers/video/omap2/dss/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -25,6 +25,13 @@ config OMAP2_DSS_DEBUG_SUPPORT 
	  This enables debug messages. You need to enable printing

	  with 'debug' module parameter.



config OMAP2_DSS_COLLECT_IRQ_STATS

	bool "Collect DSS IRQ statistics"

	depends on OMAP2_DSS_DEBUG_SUPPORT

	default n

	help

	  Collect DSS IRQ statistics, printable via debugfs



config OMAP2_DSS_RFBI

	bool "RFBI support"

        default n

drivers/video/omap2/dss/core.c

+8 −0
Original line number Diff line number Diff line
@@ -395,6 +395,14 @@ static int dss_initialize_debugfs(void) 
	debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,

			&dss_debug_dump_clocks, &dss_debug_fops);



	debugfs_create_file("dispc_irq", S_IRUGO, dss_debugfs_dir,

			&dispc_dump_irqs, &dss_debug_fops);



#ifdef CONFIG_OMAP2_DSS_DSI

	debugfs_create_file("dsi_irq", S_IRUGO, dss_debugfs_dir,

			&dsi_dump_irqs, &dss_debug_fops);

#endif



	debugfs_create_file("dss", S_IRUGO, dss_debugfs_dir,

			&dss_dump_regs, &dss_debug_fops);

	debugfs_create_file("dispc", S_IRUGO, dss_debugfs_dir,

drivers/video/omap2/dss/dispc.c

+67 −0
Original line number Diff line number Diff line
@@ -148,6 +148,12 @@ static const struct dispc_reg dispc_reg_att[] = { DISPC_GFX_ATTRIBUTES, 
	DISPC_VID_ATTRIBUTES(0),

	DISPC_VID_ATTRIBUTES(1) };



struct dispc_irq_stats {

	unsigned long last_reset;

	unsigned irq_count;

	unsigned irqs[32];

};



static struct {

	void __iomem    *base;
@@ -160,6 +166,11 @@ static struct { 
	struct work_struct error_work;



	u32		ctx[DISPC_SZ_REGS / sizeof(u32)];



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spinlock_t irq_stats_lock;

	struct dispc_irq_stats irq_stats;

#endif

} dispc;



static void _omap_dispc_set_irqs(void);
@@ -2247,6 +2258,50 @@ void dispc_dump_clocks(struct seq_file *s) 
	enable_clocks(0);

}



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

void dispc_dump_irqs(struct seq_file *s)

{

	unsigned long flags;

	struct dispc_irq_stats stats;



	spin_lock_irqsave(&dispc.irq_stats_lock, flags);



	stats = dispc.irq_stats;

	memset(&dispc.irq_stats, 0, sizeof(dispc.irq_stats));

	dispc.irq_stats.last_reset = jiffies;



	spin_unlock_irqrestore(&dispc.irq_stats_lock, flags);



	seq_printf(s, "period %u ms\n",

			jiffies_to_msecs(jiffies - stats.last_reset));



	seq_printf(s, "irqs %d\n", stats.irq_count);

#define PIS(x) \

	seq_printf(s, "%-20s %10d\n", #x, stats.irqs[ffs(DISPC_IRQ_##x)-1]);



	PIS(FRAMEDONE);

	PIS(VSYNC);

	PIS(EVSYNC_EVEN);

	PIS(EVSYNC_ODD);

	PIS(ACBIAS_COUNT_STAT);

	PIS(PROG_LINE_NUM);

	PIS(GFX_FIFO_UNDERFLOW);

	PIS(GFX_END_WIN);

	PIS(PAL_GAMMA_MASK);

	PIS(OCP_ERR);

	PIS(VID1_FIFO_UNDERFLOW);

	PIS(VID1_END_WIN);

	PIS(VID2_FIFO_UNDERFLOW);

	PIS(VID2_END_WIN);

	PIS(SYNC_LOST);

	PIS(SYNC_LOST_DIGIT);

	PIS(WAKEUP);

#undef PIS

}

#else

void dispc_dump_irqs(struct seq_file *s) { }

#endif



void dispc_dump_regs(struct seq_file *s)

{

#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dispc_read_reg(r))
@@ -2665,6 +2720,13 @@ void dispc_irq_handler(void) 


	irqstatus = dispc_read_reg(DISPC_IRQSTATUS);



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spin_lock(&dispc.irq_stats_lock);

	dispc.irq_stats.irq_count++;

	dss_collect_irq_stats(irqstatus, dispc.irq_stats.irqs);

	spin_unlock(&dispc.irq_stats_lock);

#endif



#ifdef DEBUG

	if (dss_debug)

		print_irq_status(irqstatus);
@@ -3012,6 +3074,11 @@ int dispc_init(void) 


	spin_lock_init(&dispc.irq_lock);



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spin_lock_init(&dispc.irq_stats_lock);

	dispc.irq_stats.last_reset = jiffies;

#endif



	INIT_WORK(&dispc.error_work, dispc_error_worker);



	dispc.base = ioremap(DISPC_BASE, DISPC_SZ_REGS);

drivers/video/omap2/dss/dsi.c

+125 −0
Original line number Diff line number Diff line
@@ -204,6 +204,14 @@ struct dsi_update_region { 
	struct omap_dss_device *device;

};



struct dsi_irq_stats {

	unsigned long last_reset;

	unsigned irq_count;

	unsigned dsi_irqs[32];

	unsigned vc_irqs[4][32];

	unsigned cio_irqs[32];

};



static struct

{

	void __iomem	*base;
@@ -258,6 +266,11 @@ static struct 
#endif

	int debug_read;

	int debug_write;



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spinlock_t irq_stats_lock;

	struct dsi_irq_stats irq_stats;

#endif

} dsi;



#ifdef DEBUG
@@ -528,6 +541,12 @@ void dsi_irq_handler(void) 


	irqstatus = dsi_read_reg(DSI_IRQSTATUS);



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spin_lock(&dsi.irq_stats_lock);

	dsi.irq_stats.irq_count++;

	dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);

#endif



	if (irqstatus & DSI_IRQ_ERROR_MASK) {

		DSSERR("DSI error, irqstatus %x\n", irqstatus);

		print_irq_status(irqstatus);
@@ -549,6 +568,10 @@ void dsi_irq_handler(void) 


		vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i));



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

		dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]);

#endif



		if (vcstatus & DSI_VC_IRQ_BTA)

			complete(&dsi.bta_completion);
@@ -568,6 +591,10 @@ void dsi_irq_handler(void) 
	if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {

		ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

		dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);

#endif



		dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);

		/* flush posted write */

		dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
@@ -579,6 +606,10 @@ void dsi_irq_handler(void) 
	dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);

	/* flush posted write */

	dsi_read_reg(DSI_IRQSTATUS);



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spin_unlock(&dsi.irq_stats_lock);

#endif

}
@@ -1226,6 +1257,95 @@ void dsi_dump_clocks(struct seq_file *s) 
	enable_clocks(0);

}



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

void dsi_dump_irqs(struct seq_file *s)

{

	unsigned long flags;

	struct dsi_irq_stats stats;



	spin_lock_irqsave(&dsi.irq_stats_lock, flags);



	stats = dsi.irq_stats;

	memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));

	dsi.irq_stats.last_reset = jiffies;



	spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);



	seq_printf(s, "period %u ms\n",

			jiffies_to_msecs(jiffies - stats.last_reset));



	seq_printf(s, "irqs %d\n", stats.irq_count);

#define PIS(x) \

	seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);



	seq_printf(s, "-- DSI interrupts --\n");

	PIS(VC0);

	PIS(VC1);

	PIS(VC2);

	PIS(VC3);

	PIS(WAKEUP);

	PIS(RESYNC);

	PIS(PLL_LOCK);

	PIS(PLL_UNLOCK);

	PIS(PLL_RECALL);

	PIS(COMPLEXIO_ERR);

	PIS(HS_TX_TIMEOUT);

	PIS(LP_RX_TIMEOUT);

	PIS(TE_TRIGGER);

	PIS(ACK_TRIGGER);

	PIS(SYNC_LOST);

	PIS(LDO_POWER_GOOD);

	PIS(TA_TIMEOUT);

#undef PIS



#define PIS(x) \

	seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \

			stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \

			stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \

			stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \

			stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);



	seq_printf(s, "-- VC interrupts --\n");

	PIS(CS);

	PIS(ECC_CORR);

	PIS(PACKET_SENT);

	PIS(FIFO_TX_OVF);

	PIS(FIFO_RX_OVF);

	PIS(BTA);

	PIS(ECC_NO_CORR);

	PIS(FIFO_TX_UDF);

	PIS(PP_BUSY_CHANGE);

#undef PIS



#define PIS(x) \

	seq_printf(s, "%-20s %10d\n", #x, \

			stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);



	seq_printf(s, "-- CIO interrupts --\n");

	PIS(ERRSYNCESC1);

	PIS(ERRSYNCESC2);

	PIS(ERRSYNCESC3);

	PIS(ERRESC1);

	PIS(ERRESC2);

	PIS(ERRESC3);

	PIS(ERRCONTROL1);

	PIS(ERRCONTROL2);

	PIS(ERRCONTROL3);

	PIS(STATEULPS1);

	PIS(STATEULPS2);

	PIS(STATEULPS3);

	PIS(ERRCONTENTIONLP0_1);

	PIS(ERRCONTENTIONLP1_1);

	PIS(ERRCONTENTIONLP0_2);

	PIS(ERRCONTENTIONLP1_2);

	PIS(ERRCONTENTIONLP0_3);

	PIS(ERRCONTENTIONLP1_3);

	PIS(ULPSACTIVENOT_ALL0);

	PIS(ULPSACTIVENOT_ALL1);

#undef PIS

}

#endif



void dsi_dump_regs(struct seq_file *s)

{

#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
@@ -3637,6 +3757,11 @@ int dsi_init(struct platform_device *pdev) 
	spin_lock_init(&dsi.errors_lock);

	dsi.errors = 0;



#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

	spin_lock_init(&dsi.irq_stats_lock);

	dsi.irq_stats.last_reset = jiffies;

#endif



	init_completion(&dsi.bta_completion);

	init_completion(&dsi.update_completion);

drivers/video/omap2/dss/dss.h

+14 −0
Original line number Diff line number Diff line
@@ -240,6 +240,7 @@ int dsi_init(struct platform_device *pdev); 
void dsi_exit(void);



void dsi_dump_clocks(struct seq_file *s);

void dsi_dump_irqs(struct seq_file *s);

void dsi_dump_regs(struct seq_file *s);



void dsi_save_context(void);
@@ -268,6 +269,7 @@ int dpi_init_display(struct omap_dss_device *dssdev); 
int dispc_init(void);

void dispc_exit(void);

void dispc_dump_clocks(struct seq_file *s);

void dispc_dump_irqs(struct seq_file *s);

void dispc_dump_regs(struct seq_file *s);

void dispc_irq_handler(void);

void dispc_fake_vsync_irq(void);
@@ -367,4 +369,16 @@ void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t); 
unsigned long rfbi_get_max_tx_rate(void);

int rfbi_init_display(struct omap_dss_device *display);





#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS

static inline void dss_collect_irq_stats(u32 irqstatus, unsigned *irq_arr)

{

	int b;

	for (b = 0; b < 32; ++b) {

		if (irqstatus & (1 << b))

			irq_arr[b]++;

	}

}

#endif



#endif