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authorEric Hustvedt <ehustvedt@cecropia.com>2006-06-20 14:36:42 -0400
committerDave Airlie <airlied@linux.ie>2006-07-03 18:59:47 +1000
commitf80d0d23f2010b7682e06449345e8199a2b2619c (patch)
tree4562504d7d10a87a9da62bdb0098850fd1fb13c9 /drivers/video
parent37bced38b3d09c3de7c871790eddde81a3ce57cb (diff)
intelfb: add vsync interrupt support
[05/05] intelfb: Honor FB_ACTIVATE_VBL for display panning Extends the intelfb_vsync struct to store panning offset. The interrupt service routine uses the stored panning offset if a pan is requested for the vsync. intelfbhw_disable_irq also pans the display if there is a pending request. Signed-off-by: Eric Hustvedt <ehustvedt@cecropia.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/intelfb/intelfb.h2
-rw-r--r--drivers/video/intelfb/intelfbdrv.c2
-rw-r--r--drivers/video/intelfb/intelfbhw.c16
3 files changed, 19 insertions, 1 deletions
diff --git a/drivers/video/intelfb/intelfb.h b/drivers/video/intelfb/intelfb.h
index 65ac37071a0..abd4c5632e3 100644
--- a/drivers/video/intelfb/intelfb.h
+++ b/drivers/video/intelfb/intelfb.h
@@ -211,6 +211,8 @@ struct intelfb_heap_data {
struct intelfb_vsync {
wait_queue_head_t wait;
unsigned int count;
+ int pan_display;
+ u32 pan_offset;
};
struct intelfb_info {
diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
index 08f8241bb92..9e93f820a93 100644
--- a/drivers/video/intelfb/intelfbdrv.c
+++ b/drivers/video/intelfb/intelfbdrv.c
@@ -900,6 +900,8 @@ intelfb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
init_waitqueue_head(&dinfo->vsync.wait);
spin_lock_init(&dinfo->int_lock);
dinfo->irq_flags = 0;
+ dinfo->vsync.pan_display = 0;
+ dinfo->vsync.pan_offset = 0;
return 0;
diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c
index 0f9631c2ad3..8038f558611 100644
--- a/drivers/video/intelfb/intelfbhw.c
+++ b/drivers/video/intelfb/intelfbhw.c
@@ -371,7 +371,13 @@ intelfbhw_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
offset += dinfo->fb.offset << 12;
- OUTREG(DSPABASE, offset);
+ dinfo->vsync.pan_offset = offset;
+ if ((var->activate & FB_ACTIVATE_VBL) && !intelfbhw_enable_irq(dinfo, 0)) {
+ dinfo->vsync.pan_display = 1;
+ } else {
+ dinfo->vsync.pan_display = 0;
+ OUTREG(DSPABASE, offset);
+ }
return 0;
}
@@ -1965,6 +1971,10 @@ intelfbhw_irq(int irq, void *dev_id, struct pt_regs *fp) {
if (tmp & VSYNC_PIPE_A_INTERRUPT) {
dinfo->vsync.count++;
+ if (dinfo->vsync.pan_display) {
+ dinfo->vsync.pan_display = 0;
+ OUTREG(DSPABASE, dinfo->vsync.pan_offset);
+ }
wake_up_interruptible(&dinfo->vsync.wait);
handled = 1;
}
@@ -2007,6 +2017,10 @@ intelfbhw_disable_irq(struct intelfb_info *dinfo) {
u16 tmp;
if (test_and_clear_bit(0, &dinfo->irq_flags)) {
+ if (dinfo->vsync.pan_display) {
+ dinfo->vsync.pan_display = 0;
+ OUTREG(DSPABASE, dinfo->vsync.pan_offset);
+ }
spin_lock_irq(&dinfo->int_lock);
OUTREG16(HWSTAM, 0xffff);
OUTREG16(IMR, 0xffff);