diff options
| author | Zhenyu Wang <zhenyuw@linux.intel.com> | 2010-04-07 16:15:55 +0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-04-12 09:23:41 -0700 |
| commit | a4a6b90150326294b1116504ba9d678bb3f42c35 (patch) | |
| tree | ed68e5cac132989cfc49e94afeddc119250ccd9f /drivers/gpu/drm/i915/intel_crt.c | |
| parent | 8db9d77b1b14fd730561f64beea8c00e4478d7c5 (diff) | |
drm/i915: Fix CRT force detect on Cougarpoint
To make CRT force detect reliable on Cougarpoint, we need to
disable DAC before force detect, and restore back when trigger
is completed.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_crt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 1f732ba568f..996d063c40c 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -157,15 +157,21 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_i915_private *dev_priv = dev->dev_private; - u32 adpa; + u32 adpa, temp; bool ret; - adpa = I915_READ(PCH_ADPA); + temp = adpa = I915_READ(PCH_ADPA); - adpa &= ~ADPA_CRT_HOTPLUG_MASK; - /* disable HPD first */ - I915_WRITE(PCH_ADPA, adpa); - (void)I915_READ(PCH_ADPA); + if (HAS_PCH_CPT(dev)) { + /* Disable DAC before force detect */ + I915_WRITE(PCH_ADPA, adpa & ~ADPA_DAC_ENABLE); + (void)I915_READ(PCH_ADPA); + } else { + adpa &= ~ADPA_CRT_HOTPLUG_MASK; + /* disable HPD first */ + I915_WRITE(PCH_ADPA, adpa); + (void)I915_READ(PCH_ADPA); + } adpa |= (ADPA_CRT_HOTPLUG_PERIOD_128 | ADPA_CRT_HOTPLUG_WARMUP_10MS | @@ -181,6 +187,11 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) while ((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) != 0) ; + if (HAS_PCH_CPT(dev)) { + I915_WRITE(PCH_ADPA, temp); + (void)I915_READ(PCH_ADPA); + } + /* Check the status to see if both blue and green are on now */ adpa = I915_READ(PCH_ADPA); adpa &= ADPA_CRT_HOTPLUG_MONITOR_MASK; |