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OMAP: DSS2: DSI: Restructure IRQ handler

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Clean up the IRQ handler a bit by separating collection of IRQ stats and
handling of IRQ errors to separate functions.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-03-02 14:44:27 +02:00
parent 4964111639
commit 69b281a614
1 changed files with 75 additions and 52 deletions
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127
drivers/video/omap2/dss/dsi.c
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@ -477,26 +477,33 @@ static void print_irq_status_cio(u32 status)
printk("\n");
}
static int debug_irq;
/* called from dss */
static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
static void dsi_collect_irq_stats(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
{
u32 irqstatus, vcstatus, ciostatus;
int i;
irqstatus = dsi_read_reg(DSI_IRQSTATUS);
/* IRQ is not for us */
if (!irqstatus)
return IRQ_NONE;
#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);
for (i = 0; i < 4; ++i)
dss_collect_irq_stats(vcstatus[i], dsi.irq_stats.vc_irqs[i]);
dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
spin_unlock(&dsi.irq_stats_lock);
}
#else
#define dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus)
#endif
static int debug_irq;
static void dsi_handle_irq_errors(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
{
int i;
if (irqstatus & DSI_IRQ_ERROR_MASK) {
DSSERR("DSI error, irqstatus %x\n", irqstatus);
print_irq_status(irqstatus);
@ -507,37 +514,48 @@ static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
print_irq_status(irqstatus);
}
#ifdef DSI_CATCH_MISSING_TE
if (irqstatus & DSI_IRQ_TE_TRIGGER)
del_timer(&dsi.te_timer);
#endif
for (i = 0; i < 4; ++i) {
if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
i, vcstatus[i]);
print_irq_status_vc(i, vcstatus[i]);
} else if (debug_irq) {
print_irq_status_vc(i, vcstatus[i]);
}
}
if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
print_irq_status_cio(ciostatus);
} else if (debug_irq) {
print_irq_status_cio(ciostatus);
}
}
static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
{
u32 irqstatus, vcstatus[4], ciostatus;
int i;
irqstatus = dsi_read_reg(DSI_IRQSTATUS);
/* IRQ is not for us */
if (!irqstatus)
return IRQ_NONE;
dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
/* flush posted write */
dsi_read_reg(DSI_IRQSTATUS);
for (i = 0; i < 4; ++i) {
if ((irqstatus & (1<<i)) == 0)
if ((irqstatus & (1 << i)) == 0) {
vcstatus[i] = 0;
continue;
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);
if (dsi.bta_callback)
dsi.bta_callback();
}
if (vcstatus & DSI_VC_IRQ_ERROR_MASK) {
DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
i, vcstatus);
print_irq_status_vc(i, vcstatus);
} else if (debug_irq) {
print_irq_status_vc(i, vcstatus);
}
vcstatus[i] = dsi_read_reg(DSI_VC_IRQSTATUS(i));
dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus);
dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus[i]);
/* flush posted write */
dsi_read_reg(DSI_VC_IRQSTATUS(i));
}
@ -545,29 +563,34 @@ static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
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);
} else {
ciostatus = 0;
}
if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
print_irq_status_cio(ciostatus);
} else if (debug_irq) {
print_irq_status_cio(ciostatus);
#ifdef DSI_CATCH_MISSING_TE
if (irqstatus & DSI_IRQ_TE_TRIGGER)
del_timer(&dsi.te_timer);
#endif
for (i = 0; i < 4; ++i) {
if (vcstatus[i] == 0)
continue;
if (vcstatus[i] & DSI_VC_IRQ_BTA) {
complete(&dsi.bta_completion);
if (dsi.bta_callback)
dsi.bta_callback();
}
}
dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
/* flush posted write */
dsi_read_reg(DSI_IRQSTATUS);
dsi_handle_irq_errors(irqstatus, vcstatus, ciostatus);
dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus);
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
spin_unlock(&dsi.irq_stats_lock);
#endif
return IRQ_HANDLED;
}