This apparently got lost when implementing the new DCE-6 support
and would cause failures in pageflip scheduling and timestamping.
Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at vger.kernel.org
---
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index 307269b..e146d25 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -979,7 +979,7 @@ static void dce_v6_0_program_watermarks(struct amdgpu_device *adev,
u32 priority_a_mark = 0, priority_b_mark = 0;
u32 priority_a_cnt = PRIORITY_OFF;
u32 priority_b_cnt = PRIORITY_OFF;
- u32 tmp, arb_control3;
+ u32 tmp, arb_control3, lb_vblank_lead_lines = 0;
fixed20_12 a, b, c;
if (amdgpu_crtc->base.enabled && num_heads && mode) {
@@ -1091,6 +1091,8 @@ static void dce_v6_0_program_watermarks(struct amdgpu_device *adev,
c.full = dfixed_div(c, a);
priority_b_mark = dfixed_trunc(c);
priority_b_cnt |= priority_b_mark & PRIORITY_MARK_MASK;
+
+ lb_vblank_lead_lines = DIV_ROUND_UP(lb_size, mode->crtc_hdisplay);
}
/* select wm A */
@@ -1120,6 +1122,9 @@ static void dce_v6_0_program_watermarks(struct amdgpu_device *adev,
/* save values for DPM */
amdgpu_crtc->line_time = line_time;
amdgpu_crtc->wm_high = latency_watermark_a;
+
+ /* Save number of lines the linebuffer leads before the scanout */
+ amdgpu_crtc->lb_vblank_lead_lines = lb_vblank_lead_lines;
}
/* watermark setup */
--
2.7.4
