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drm/amd/display: Do DC mode-change check after stream creation 

Do DC level mode change checks (via dc_stream_state) only when creating
a new stream, as this check is uneccessary without a new dc_stream_state
anyways. Doing so better demonstrates the intent of this mode-change
check, in comparison to guarding it with the 'enable' flag.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo (Sunpeng) Li 2017-11-21 13:19:04 -05:00 committed by Alex Deucher
parent b58958a79b
commit a97599a4a2
1 changed files with 7 additions and 10 deletions
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17
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -4513,18 +4513,15 @@ static int dm_update_crtcs_state(struct dc *dc,
__func__, acrtc->base.base.id);
break;
}
if (dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) &&
dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) {
new_crtc_state->mode_changed = false;
DRM_DEBUG_DRIVER("Mode change not required, setting mode_changed to %d",
new_crtc_state->mode_changed);
}
}
if (enable && dc_is_stream_unchanged(new_stream, dm_old_crtc_state->stream) &&
dc_is_stream_scaling_unchanged(new_stream, dm_old_crtc_state->stream)) {
new_crtc_state->mode_changed = false;
DRM_DEBUG_DRIVER("Mode change not required, setting mode_changed to %d",
new_crtc_state->mode_changed);
}
if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
goto next_crtc;