The bspec lists both the clock frequency and the effective interval. The
interval corresponds to observed behaviour, so adjust the frequency to
match.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
index 852a7d731b3b..999079686846 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
@@ -7,9 +7,9 @@
#include "intel_gt.h"
#include "intel_gt_clock_utils.h"
+#define MHZ_12 12000000 /* 12MHz (24MHz/2), 83.333ns */
+#define MHZ_12_5 12500000 /* 12.5MHz (25MHz/2), 80ns */
#define MHZ_19_2 19200000 /* 19.2MHz, 52.083ns */
-#define MHZ_24 24000000 /* 24MHz, 83.333ns */
-#define MHZ_25 25000000 /* 25MHz, 80ns */
static u32 read_clock_frequency(const struct intel_gt *gt)
{
@@ -21,19 +21,19 @@ static u32 read_clock_frequency(const struct intel_gt *gt)
config >>= GEN11_RPM_CONFIG0_CRYSTAL_CLOCK_FREQ_SHIFT;
switch (config) {
- case 0: return MHZ_24;
+ case 0: return MHZ_12;
case 1:
case 2: return MHZ_19_2;
default:
- case 3: return MHZ_25;
+ case 3: return MHZ_12_5;
}
} else if (INTEL_GEN(gt->i915) >= 9) {
if (IS_GEN9_LP(gt->i915))
return MHZ_19_2;
else
- return MHZ_24;
+ return MHZ_12;
} else {
- return MHZ_25;
+ return MHZ_12_5;
}
}
--
2.20.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
