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drm/i915: disable the infoframe before changing it

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That's what the VIDEO_DIP_CTL documentation says we need to do. Except
when it's the AVI InfoFrame and we're ironlake_write_infoframe.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2012-05-04 17:18:21 -03:00 committed by Daniel Vetter
parent fa193ff799
commit ecb978515c
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/intel_hdmi.c
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@ -153,6 +153,7 @@ static void i9xx_write_infoframe(struct drm_encoder *encoder,
val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
val |= intel_infoframe_index(frame);
val &= ~intel_infoframe_enable(frame);
val |= VIDEO_DIP_ENABLE;
I915_WRITE(VIDEO_DIP_CTL, val);
@ -185,6 +186,13 @@ static void ironlake_write_infoframe(struct drm_encoder *encoder,
val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
val |= intel_infoframe_index(frame);
/* The DIP control register spec says that we need to update the AVI
* infoframe without clearing its enable bit */
if (frame->type == DIP_TYPE_AVI)
val |= VIDEO_DIP_ENABLE_AVI;
else
val &= ~intel_infoframe_enable(frame);
val |= VIDEO_DIP_ENABLE;
I915_WRITE(reg, val);
@ -217,6 +225,7 @@ static void vlv_write_infoframe(struct drm_encoder *encoder,
val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
val |= intel_infoframe_index(frame);
val &= ~intel_infoframe_enable(frame);
val |= VIDEO_DIP_ENABLE;
I915_WRITE(reg, val);