Collect interrupt statistics, printable via debugfs:
debugfs/omapdss/dispc_irq
debugfs/omapdss/dsi_irq
The counters are reset when printed.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxx>
---
drivers/video/omap2/dss/Kconfig | 7 ++
drivers/video/omap2/dss/core.c | 8 +++
drivers/video/omap2/dss/dispc.c | 67 +++++++++++++++++++++
drivers/video/omap2/dss/dsi.c | 125 +++++++++++++++++++++++++++++++++++++++
drivers/video/omap2/dss/dss.h | 14 ++++
5 files changed, 221 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/Kconfig b/drivers/video/omap2/dss/Kconfig
index 71d8dec..c63ce76 100644
--- a/drivers/video/omap2/dss/Kconfig
+++ b/drivers/video/omap2/dss/Kconfig
@@ -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
diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
index 29497a0..dbb0ce2 100644
--- a/drivers/video/omap2/dss/core.c
+++ b/drivers/video/omap2/dss/core.c
@@ -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,
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 6dabf4b..e2e0f9a 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -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);
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index dda7b3f..f3eaf12 100644
--- a/drivers/video/omap2/dss/dsi.c
+++ b/drivers/video/omap2/dss/dsi.c
@@ -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))
@@ -3638,6 +3758,11 @@ 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);
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 8da5ac4..2bcb124 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -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
--
1.6.5
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