intelfb: fixup clock calculation debugging.
The debugging code for pll clocks was wrong and causing div by 0.
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c
index 16c9c19..426b7430 100644
--- a/drivers/video/intelfb/intelfbhw.c
+++ b/drivers/video/intelfb/intelfbhw.c
@@ -615,6 +615,33 @@
return vco / p;
}
+static void
+intelfbhw_get_p1p2(struct intelfb_info *dinfo, int dpll, int *o_p1, int *o_p2)
+{
+ int p1, p2;
+
+ if (IS_I9XX(dinfo)) {
+ if (dpll & DPLL_P1_FORCE_DIV2)
+ p1 = 1;
+ else
+ p1 = (dpll >> DPLL_P1_SHIFT) & 0xff;
+
+ p1 = ffs(p1);
+
+ p2 = (dpll >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
+ } else {
+ if (dpll & DPLL_P1_FORCE_DIV2)
+ p1 = 0;
+ else
+ p1 = (dpll >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
+ p2 = (dpll >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
+ }
+
+ *o_p1 = p1;
+ *o_p2 = p2;
+}
+
+
void
intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw)
{
@@ -633,12 +660,8 @@
n = (hw->vga0_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m1 = (hw->vga0_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m2 = (hw->vga0_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
- if (hw->vga_pd & VGAPD_0_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->vga_pd >> VGAPD_0_P1_SHIFT) & DPLL_P1_MASK;
- p2 = (hw->vga_pd >> VGAPD_0_P2_SHIFT) & DPLL_P2_MASK;
+ intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
printk(" VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
m1, m2, n, p1, p2);
@@ -648,11 +671,8 @@
n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
- if (hw->vga_pd & VGAPD_1_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->vga_pd >> VGAPD_1_P1_SHIFT) & DPLL_P1_MASK;
- p2 = (hw->vga_pd >> VGAPD_1_P2_SHIFT) & DPLL_P2_MASK;
+
+ intelfbhw_get_p1p2(dinfo, hw->vga_pd, &p1, &p2);
printk(" VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
m1, m2, n, p1, p2);
printk(" VGA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0));
@@ -668,38 +688,7 @@
m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
- if (IS_I9XX(dinfo)) {
- int tmpp1;
-
- if (hw->dpll_a & DPLL_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & 0xff;
-
- tmpp1 = p1;
-
- switch (tmpp1)
- {
- case 0x1: p1 = 1; break;
- case 0x2: p1 = 2; break;
- case 0x4: p1 = 3; break;
- case 0x8: p1 = 4; break;
- case 0x10: p1 = 5; break;
- case 0x20: p1 = 6; break;
- case 0x40: p1 = 7; break;
- case 0x80: p1 = 8; break;
- default: break;
- }
-
- p2 = (hw->dpll_a >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
-
- } else {
- if (hw->dpll_a & DPLL_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
- p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
- }
+ intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
printk(" PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
m1, m2, n, p1, p2);
@@ -709,37 +698,8 @@
m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK;
- if (IS_I9XX(dinfo)) {
- int tmpp1;
+ intelfbhw_get_p1p2(dinfo, hw->dpll_a, &p1, &p2);
- if (hw->dpll_a & DPLL_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & 0xff;
-
- tmpp1 = p1;
-
- switch (tmpp1) {
- case 0x1: p1 = 1; break;
- case 0x2: p1 = 2; break;
- case 0x4: p1 = 3; break;
- case 0x8: p1 = 4; break;
- case 0x10: p1 = 5; break;
- case 0x20: p1 = 6; break;
- case 0x40: p1 = 7; break;
- case 0x80: p1 = 8; break;
- default: break;
- }
-
- p2 = (hw->dpll_a >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK;
-
- } else {
- if (hw->dpll_a & DPLL_P1_FORCE_DIV2)
- p1 = 0;
- else
- p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK;
- p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK;
- }
printk(" PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n",
m1, m2, n, p1, p2);
printk(" PLLA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0));