This is a note to let you know that I've just added the patch titled drm/amdgpu: Add missing lb_vblank_lead_lines setup to DCE-6 path. to the 4.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amdgpu-add-missing-lb_vblank_lead_lines-setup-to-dce-6-path.patch and it can be found in the queue-4.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From effaf848b957fbf72a3b6a1ad87f5e031eda0b75 Mon Sep 17 00:00:00 2001 From: Mario Kleiner <mario.kleiner.de@xxxxxxxxx> Date: Mon, 24 Apr 2017 01:02:46 +0200 Subject: drm/amdgpu: Add missing lb_vblank_lead_lines setup to DCE-6 path. From: Mario Kleiner <mario.kleiner.de@xxxxxxxxx> commit effaf848b957fbf72a3b6a1ad87f5e031eda0b75 upstream. 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@xxxxxxxxx> Cc: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- 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( 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( 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( /* 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 */ Patches currently in stable-queue which might be from mario.kleiner.de@xxxxxxxxx are queue-4.11/drm-amdgpu-add-missing-lb_vblank_lead_lines-setup-to-dce-6-path.patch queue-4.11/drm-amdgpu-avoid-overflows-divide-by-zero-in-latency_watermark-calculations.patch queue-4.11/drm-amdgpu-make-display-watermark-calculations-more-accurate.patch