From 44fa346f7ac0e23a53ae0a5587d14ef1c3f86647 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 18 Dec 2012 22:17:00 -0500 Subject: drm/radeon: add get_gpu_clock_counter() callback for cik Used for GPU clock counter snapshots. Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/cik.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/gpu/drm/radeon/cik.c') diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index f17e4912eb6a..7aae670080d3 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -5554,3 +5554,24 @@ void dce8_bandwidth_update(struct radeon_device *rdev) dce8_program_watermarks(rdev, rdev->mode_info.crtcs[i], lb_size, num_heads); } } + +/** + * cik_get_gpu_clock_counter - return GPU clock counter snapshot + * + * @rdev: radeon_device pointer + * + * Fetches a GPU clock counter snapshot (SI). + * Returns the 64 bit clock counter snapshot. + */ +uint64_t cik_get_gpu_clock_counter(struct radeon_device *rdev) +{ + uint64_t clock; + + mutex_lock(&rdev->gpu_clock_mutex); + WREG32(RLC_CAPTURE_GPU_CLOCK_COUNT, 1); + clock = (uint64_t)RREG32(RLC_GPU_CLOCK_COUNT_LSB) | + ((uint64_t)RREG32(RLC_GPU_CLOCK_COUNT_MSB) << 32ULL); + mutex_unlock(&rdev->gpu_clock_mutex); + return clock; +} + -- cgit v1.2.3