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drm/i915/pmu: Use existing uncore helper to read gpm_timestamp

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Use intel_uncore_read64_2x32 to read upper and lower fields of the GPM
timestamp.

v2: Fix compile error

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220427003515.3944267-1-umesh.nerlige.ramappa@intel.com
This commit is contained in:
Umesh Nerlige Ramappa 2022-04-26 17:35:15 -07:00 committed by John Harrison
parent 95fb5f188c
commit ad6ade8e34
1 changed files with 2 additions and 15 deletions
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17
drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
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@ -1200,20 +1200,6 @@ static u32 gpm_timestamp_shift(struct intel_gt *gt)
return 3 - shift;
}
static u64 gpm_timestamp(struct intel_gt *gt)
{
u32 lo, hi, old_hi, loop = 0;
hi = intel_uncore_read(gt->uncore, MISC_STATUS1);
do {
lo = intel_uncore_read(gt->uncore, MISC_STATUS0);
old_hi = hi;
hi = intel_uncore_read(gt->uncore, MISC_STATUS1);
} while (old_hi != hi && loop++ < 2);
return ((u64)hi << 32) | lo;
}
static void guc_update_pm_timestamp(struct intel_guc *guc, ktime_t *now)
{
struct intel_gt *gt = guc_to_gt(guc);
@ -1223,7 +1209,8 @@ static void guc_update_pm_timestamp(struct intel_guc *guc, ktime_t *now)
lockdep_assert_held(&guc->timestamp.lock);
gt_stamp_hi = upper_32_bits(guc->timestamp.gt_stamp);
gpm_ts = gpm_timestamp(gt) >> guc->timestamp.shift;
gpm_ts = intel_uncore_read64_2x32(gt->uncore, MISC_STATUS0,
MISC_STATUS1) >> guc->timestamp.shift;
gt_stamp_lo = lower_32_bits(gpm_ts);
*now = ktime_get();