From 7d2c24e8cd997867936b41a94a9984382af1566a Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 15 Jun 2012 11:55:15 -0700 Subject: [PATCH] drm/i915: add ValleyView specific CRT detect function Might be able to merge this back in at some point, but we're seeing bugs with ADPA based detection, so keep it separate for now with explicit hotplug trigger usage. v2: drop superfluous debug message v3: comment forced detection, need to debug (Eugeni) Reviewed-by: Eugeni Dodonov Signed-off-by: Jesse Barnes Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_crt.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 5978490..71b412a 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -230,6 +230,42 @@ static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) return ret; } +static bool valleyview_crt_detect_hotplug(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 adpa; + bool ret; + u32 save_adpa; + + save_adpa = adpa = I915_READ(ADPA); + DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa); + + adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; + + I915_WRITE(ADPA, adpa); + + if (wait_for((I915_READ(ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, + 1000)) { + DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); + I915_WRITE(ADPA, save_adpa); + } + + /* Check the status to see if both blue and green are on now */ + adpa = I915_READ(ADPA); + if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) + ret = true; + else + ret = false; + + DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret); + + /* FIXME: debug force function and remove */ + ret = true; + + return ret; +} + /** * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. * @@ -249,6 +285,9 @@ static bool intel_crt_detect_hotplug(struct drm_connector *connector) if (HAS_PCH_SPLIT(dev)) return intel_ironlake_crt_detect_hotplug(connector); + if (IS_VALLEYVIEW(dev)) + return valleyview_crt_detect_hotplug(connector); + /* * On 4 series desktop, CRT detect sequence need to be done twice * to get a reliable result. -- 2.7.4