| Message ID | 1270631482-30282-2-git-send-email-zhenyuw@linux.intel.com (mailing list archive) |
|---|---|
| State | Rejected |
| Headers | show |
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c index d7d39b2..eea5930 100644 --- a/drivers/gpu/drm/i915/intel_tv.c +++ b/drivers/gpu/drm/i915/intel_tv.c @@ -1399,6 +1399,15 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct intel_encoder *intel_encoder DAC_A_0_7_V | DAC_B_0_7_V | DAC_C_0_7_V); + + /* + * The TV sense state should be cleared to zero on cantiga platform. Otherwise + * the TV is misdetected. This is hardware requirement. + */ + if (IS_GM45(dev)) + tv_dac &= ~(TVDAC_STATE_CHG_EN | TVDAC_A_SENSE_CTL | + TVDAC_B_SENSE_CTL | TVDAC_C_SENSE_CTL); + I915_WRITE(TV_CTL, tv_ctl); I915_WRITE(TV_DAC, tv_dac); intel_wait_for_vblank(dev);