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drm/tegra: dc: Clarify comment about cursor treatment

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Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-07-21 16:42:30 +02:00
parent 6ca1f62f0d
commit a1df3b2488
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/tegra/dc.c
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@ -809,9 +809,11 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
return ERR_PTR(-ENOMEM);
/*
* We'll treat the cursor as an overlay plane with index 6 here so
* that the update and activation request bits in DC_CMD_STATE_CONTROL
* match up.
* This index is kind of fake. The cursor isn't a regular plane, but
* its update and activation request bits in DC_CMD_STATE_CONTROL do
* use the same programming. Setting this fake index here allows the
* code in tegra_add_plane_state() to do the right thing without the
* need to special-casing the cursor plane.
*/
plane->index = 6;