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drm/tegra: Don't disable unused planes

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When a plane isn't in use it isn't attached to a CRTC and therefore the
DC registers aren't available for programming.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
This commit is contained in:
Thierry Reding 2013-03-18 11:09:13 +01:00 committed by Thierry Reding
parent c7788792a5
commit 2678aeba5f
1 changed files with 3 additions and 0 deletions
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drivers/gpu/host1x/drm/dc.c
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@ -79,6 +79,9 @@ static int tegra_plane_disable(struct drm_plane *plane)
struct tegra_plane *p = to_tegra_plane(plane);
unsigned long value;
if (!plane->crtc)
return 0;
value = WINDOW_A_SELECT << p->index;
tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);