intelfb: add vsync interrupt support

[02/05] intelfb: Add interrupt related register definitions

Add constants for accessing HWSTAM, IER, IIR, and IMR registers.
Add constants for interrupt types supported by the 8xx and 9xx chipsets.
The registers are also stored in the hwstate struct and dumped in the debug routine.

Signed-off-by: Eric Hustvedt <ehustvedt@cecropia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c
index 7533b3dd08ac..05aded669cdb 100644
--- a/drivers/video/intelfb/intelfbhw.c
+++ b/drivers/video/intelfb/intelfbhw.c
@@ -587,6 +587,11 @@ intelfbhw_read_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw,
         hw->fw_blc_0 = INREG(FW_BLC_0);
         hw->fw_blc_1 = INREG(FW_BLC_1);
 
+        hw->hwstam = INREG16(HWSTAM);
+        hw->ier = INREG16(IER);
+        hw->iir = INREG16(IIR);
+        hw->imr = INREG16(IMR);
+
         return 0;
 }
 
@@ -796,6 +801,10 @@ intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw)
         printk("        FW_BLC_0                0x%08x\n", hw->fw_blc_0);
         printk("        FW_BLC_1                0x%08x\n", hw->fw_blc_1);
 
+        printk("        HWSTAM                  0x%04x\n", hw->hwstam);
+        printk("        IER                     0x%04x\n", hw->ier);
+        printk("        IIR                     0x%04x\n", hw->iir);
+        printk("        IMR                     0x%04x\n", hw->imr);
         printk("hw state dump end\n");
 #endif
 }