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: Tomi Valkeinen <tomi.valkeinen@nokia.com>

1 files changed, 125 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
index e65056317a28..03f85df70749 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))
@@ -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);