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drm/i915: add sprite assertion function for VLV

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Need to make sure sprites are disabled before shutting off a pipe.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2013-03-28 09:55:38 -07:00 committed by Daniel Vetter
parent 7f1f3851fe
commit 19332d7aab
1 changed files with 20 additions and 0 deletions
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20
drivers/gpu/drm/i915/intel_display.c
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@ -1288,6 +1288,25 @@ static void assert_planes_disabled(struct drm_i915_private *dev_priv,
}
}
static void assert_sprites_disabled(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
int reg, i;
u32 val;
if (!IS_VALLEYVIEW(dev_priv->dev))
return;
/* Need to check both planes against the pipe */
for (i = 0; i < dev_priv->num_plane; i++) {
reg = SPCNTR(pipe, i);
val = I915_READ(reg);
WARN((val & SP_ENABLE),
"sprite %d assertion failure, should be off on pipe %c but is still active\n",
pipe * 2 + i, pipe_name(pipe));
}
}
static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
{
u32 val;
@ -1872,6 +1891,7 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
* or we might hang the display.
*/
assert_planes_disabled(dev_priv, pipe);
assert_sprites_disabled(dev_priv, pipe);
/* Don't disable pipe A or pipe A PLLs if needed */
if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))