From: Zhao Yakui <yakui.z...@intel.com> ... otherwise the TV type will be misdetected and cause spurious connections.
This was originally applied as fb8b5a39b6310379d7b54c0c7113703a8eaf4a57 (drm/i915: Configure the TV sense state correctly on GM45 to make TV detection reliable) Eric: Shortly after applying this patch you requested it to be reverted, d4b74bf07873da2e94219a7b67a334fc1c3ce649 (Revert "drm/i915: Configure the TV sense state correctly on GM45 to make TV), but we have no clear information just what is broken by this patch and how to resolve it. Reported-and-tested-by: darkbas...@gmail.com Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=27168 Signed-off-by: Zhao Yakui <yakui.z...@intel.com> Tested-by: Santi <sa...@agolina.net> Cc: Eric Anholt <e...@anholt.net> --- drivers/gpu/drm/i915/intel_tv.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c index 6b22c1d..3047a66 100644 --- a/drivers/gpu/drm/i915/intel_tv.c +++ b/drivers/gpu/drm/i915/intel_tv.c @@ -1269,6 +1269,15 @@ intel_tv_detect_type (struct intel_tv *intel_tv, 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); POSTING_READ(TV_DAC); -- 1.7.4.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
