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drm/i915/tv: Preserve reserved DAC bits during mode-setting

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-05 00:43:42 +01:00
parent efe8c25680
commit b8ed2a4f12
2 changed files with 2 additions and 1 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
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@ -1481,6 +1481,7 @@
# define TV_TEST_MODE_MASK (7 << 0)
#define TV_DAC 0x68004
# define TV_DAC_SAVE 0x00ffff00
/**
* Reports that DAC state change logic has reported change (RO).
*

2
drivers/gpu/drm/i915/intel_tv.c
View File

@ -1196,7 +1196,7 @@ intel_tv_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
I915_WRITE(TV_V_LUMA_0 + (i<<2), tv_mode->filter_table[j++]);
for (i = 0; i < 43; i++)
I915_WRITE(TV_V_CHROMA_0 + (i<<2), tv_mode->filter_table[j++]);
I915_WRITE(TV_DAC, 0);
I915_WRITE(TV_DAC, I915_READ(TV_DAC) & TV_DAC_SAVE);
I915_WRITE(TV_CTL, tv_ctl);
}