From: Pallavi G <pallav...@intel.com>
For high res modes m n p calculation is fixed for VLV platform.
Signed-off-by: Vijay Purushothaman <vijay.a.purushotha...@intel.com>
Signed-off-by: Pallavi G <pallav...@intel.com>
Signed-off-by: Yogesh M <yogesh.mohan.marimu...@intel.com>
Signed-off-by: Gajanan Bhat <gajanan.b...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 31 +++++++++++++++++++++----------
1 file changed, 21 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 3b189fa..fd4a0d4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -380,21 +380,21 @@ static const intel_limit_t intel_limits_vlv_dac = {
.m1 = { .min = 2, .max = 3 },
.m2 = { .min = 11, .max = 156 },
.p = { .min = 10, .max = 30 },
- .p1 = { .min = 2, .max = 3 },
+ .p1 = { .min = 1, .max = 3 },
.p2 = { .dot_limit = 270000,
.p2_slow = 2, .p2_fast = 20 },
.find_pll = intel_vlv_find_best_pll,
};
static const intel_limit_t intel_limits_vlv_hdmi = {
- .dot = { .min = 20000, .max = 165000 },
- .vco = { .min = 4000000, .max = 5994000},
- .n = { .min = 1, .max = 7 },
+ .dot = { .min = 25000, .max = 180000 },
+ .vco = { .min = 4040000, .max = 5960000 },
+ .n = { .min = 1, .max = 5 },
.m = { .min = 60, .max = 300 }, /* guess */
.m1 = { .min = 2, .max = 3 },
- .m2 = { .min = 11, .max = 156 },
+ .m2 = { .min = 15, .max = 149 },
.p = { .min = 10, .max = 30 },
- .p1 = { .min = 2, .max = 3 },
+ .p1 = { .min = 1, .max = 3 },
.p2 = { .dot_limit = 270000,
.p2_slow = 2, .p2_fast = 20 },
.find_pll = intel_vlv_find_best_pll,
@@ -408,7 +408,7 @@ static const intel_limit_t intel_limits_vlv_dp = {
.m1 = { .min = 2, .max = 3 },
.m2 = { .min = 11, .max = 156 },
.p = { .min = 10, .max = 30 },
- .p1 = { .min = 2, .max = 3 },
+ .p1 = { .min = 1, .max = 3 },
.p2 = { .dot_limit = 270000,
.p2_slow = 2, .p2_fast = 20 },
.find_pll = intel_vlv_find_best_pll,
@@ -809,10 +809,14 @@ intel_vlv_find_best_pll(const intel_limit_t *limit,
struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *match_clock,
intel_clock_t *best_clock)
{
+#define LONG_OVERFLOW 0x7FFFFFFF
+#define DIFF_OVERFLOW (LONG_OVERFLOW/10000)
+
u32 p1, p2, m1, m2, vco, bestn, bestm1, bestm2, bestp1, bestp2;
u32 m, n, fastclk;
u32 updrate, minupdate, fracbits, p;
- unsigned long bestppm, ppm, absppm;
+ long bestppm, ppm, absppm, ppmdiff, absppmdiff;
+ unsigned long ulMult = 1;
int dotclk, flag;
flag = 0;
@@ -841,8 +845,15 @@ intel_vlv_find_best_pll(const intel_limit_t *limit, struct
drm_crtc *crtc,
m = m1 * m2;
vco = updrate * m;
if (vco >= limit->vco.min && vco <
limit->vco.max) {
- ppm = 1000000 * ((vco / p) -
fastclk) / fastclk;
- absppm = (ppm > 0) ? ppm :
(-ppm);
+ ppmdiff = ((100*vco)/p) -
(100*fastclk);
+ absppmdiff = (ppmdiff > 0) ?
ppmdiff : (-ppmdiff);
+ ulMult = 1;
+ while (absppmdiff >
DIFF_OVERFLOW) {
+ absppmdiff /= 10;
+ ulMult *= 10;
+ }
+ absppm =
((absppmdiff*10000)/fastclk)*ulMult;
+
if (absppm < 100 && ((p1 * p2)
> (bestp1 * bestp2))) {
bestppm = 0;
flag = 1;
--
1.7.9.5
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