From a1df3b24884d5d8946d6cdf44e6d403e3925b4c6 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Tue, 21 Jul 2015 16:42:30 +0200 Subject: [PATCH] drm/tegra: dc: Clarify comment about cursor treatment Signed-off-by: Thierry Reding --- drivers/gpu/drm/tegra/dc.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index e424755dd578..6b1dc02f98ef 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -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;