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drm/tegra: dc: Disable plane if it is invisible

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On Tegra20 if plane has width or height equal to 0, it will be infinitely
wide or tall. Let's disable the plane if it is invisible on atomic state
committing to fix the issue. The Rockchip DRM driver does the same.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko 2017-06-15 02:18:31 +03:00 committed by Thierry Reding
parent 7d2058571a
commit 80d3eef16e
1 changed files with 21 additions and 12 deletions
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33
drivers/gpu/drm/tegra/dc.c
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@ -559,6 +559,23 @@ static int tegra_plane_atomic_check(struct drm_plane *plane,
return 0;
}
static void tegra_dc_disable_window(struct tegra_dc *dc, int index)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&dc->lock, flags);
value = WINDOW_A_SELECT << index;
tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
value &= ~WIN_ENABLE;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
spin_unlock_irqrestore(&dc->lock, flags);
}
static void tegra_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
@ -573,6 +590,9 @@ static void tegra_plane_atomic_update(struct drm_plane *plane,
if (!plane->state->crtc || !plane->state->fb)
return;
if (!plane->state->visible)
return tegra_dc_disable_window(dc, p->index);
memset(&window, 0, sizeof(window));
window.src.x = plane->state->src.x1 >> 16;
window.src.y = plane->state->src.y1 >> 16;
@ -612,8 +632,6 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
{
struct tegra_plane *p = to_tegra_plane(plane);
struct tegra_dc *dc;
unsigned long flags;
u32 value;
/* rien ne va plus */
if (!old_state || !old_state->crtc)
@ -621,16 +639,7 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
dc = to_tegra_dc(old_state->crtc);
spin_lock_irqsave(&dc->lock, flags);
value = WINDOW_A_SELECT << p->index;
tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
value &= ~WIN_ENABLE;
tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
spin_unlock_irqrestore(&dc->lock, flags);
tegra_dc_disable_window(dc, p->index);
}
static const struct drm_plane_helper_funcs tegra_primary_plane_helper_funcs = {