27 lines
797 B
Diff
27 lines
797 B
Diff
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Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
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Tested-by: Santi <santi@agolina.net>
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---
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drivers/gpu/drm/i915/intel_tv.c | 9 +++++++++
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1 files changed, 9 insertions(+), 0 deletions(-)
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diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
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index dc83b7a..c8f67bf 100644
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--- a/drivers/gpu/drm/i915/intel_tv.c
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+++ b/drivers/gpu/drm/i915/intel_tv.c
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@@ -1267,6 +1267,15 @@
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DAC_B_0_7_V |
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DAC_C_0_7_V);
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+ /*
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+ * The TV sense state should be cleared to zero on cantiga platform. Otherwise
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+ * the TV is misdetected. This is hardware requirement.
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+ */
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+ if (IS_GM45(dev))
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+ tv_dac &= ~(TVDAC_STATE_CHG_EN | TVDAC_A_SENSE_CTL |
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+ TVDAC_B_SENSE_CTL | TVDAC_C_SENSE_CTL);
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+
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+
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I915_WRITE(TV_CTL, tv_ctl);
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I915_WRITE(TV_DAC, tv_dac);
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POSTING_READ(TV_DAC);
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