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drm/amd/display: Know what a pageflip is

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[Why]
We were assuming that any commit with allow_modeset == false
was a pageflip.  This was against drm intention and only
worked by sheer luck

[How]
A pageflip is the change from one framebuffer to another

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis 2018-12-12 14:11:53 -05:00 committed by Alex Deucher
parent bc7f670ee0
commit b2e8530249
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -4683,7 +4683,8 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
if (!new_crtc_state->active) if (!new_crtc_state->active)
continue; continue;
pflip_needed = !state->allow_modeset; pflip_needed = old_plane_state->fb &&
old_plane_state->fb != new_plane_state->fb;
dc_plane = dm_new_plane_state->dc_state; dc_plane = dm_new_plane_state->dc_state;