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drm/i915: set TV detection mode when tv is already connected

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We used load_detect_temp flag to determine whether to set tv to the test
mode. However if the TV already has a mode set, we still need to set the
test mode to determine connection.  This results in blinking, but there is
no other reliable way to determine TV connection.

freedesktop.org bug #22035

Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
ling.ma@intel.com 2009-06-22 22:08:35 +08:00 • committed by Eric Anholt
parent 921809a583
commit 8ed9a5bc9c
1 changed files with 25 additions and 28 deletions
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3
drivers/gpu/drm/i915/intel_tv.c
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@ -1383,8 +1383,6 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct intel_output *intel_output)
/* /*
* Detect TV by polling) * Detect TV by polling)
*/ */
if (intel_output->load_detect_temp) {
/* TV not currently running, prod it with destructive detect */
save_tv_dac = tv_dac; save_tv_dac = tv_dac;
tv_ctl = I915_READ(TV_CTL); tv_ctl = I915_READ(TV_CTL);
save_tv_ctl = tv_ctl; save_tv_ctl = tv_ctl;
@ -1410,7 +1408,6 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct intel_output *intel_output)
I915_WRITE(TV_DAC, save_tv_dac); I915_WRITE(TV_DAC, save_tv_dac);
I915_WRITE(TV_CTL, save_tv_ctl); I915_WRITE(TV_CTL, save_tv_ctl);
intel_wait_for_vblank(dev); intel_wait_for_vblank(dev);
}
/* /*
* A B C * A B C
* 0 1 1 Composite * 0 1 1 Composite