diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_crt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_crt.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 8df574316063..17035b87ee46 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -30,6 +30,7 @@ #include "drm.h" #include "drm_crtc.h" #include "drm_crtc_helper.h" +#include "drm_edid.h" #include "intel_drv.h" #include "i915_drm.h" #include "i915_drv.h" @@ -287,8 +288,9 @@ static bool intel_crt_ddc_probe(struct drm_i915_private *dev_priv, int ddc_bus) return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 1) == 1; } -static bool intel_crt_detect_ddc(struct intel_crt *crt) +static bool intel_crt_detect_ddc(struct drm_connector *connector) { + struct intel_crt *crt = intel_attached_crt(connector); struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private; /* CRT should always be at 0, but check anyway */ @@ -301,8 +303,26 @@ static bool intel_crt_detect_ddc(struct intel_crt *crt) } if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) { - DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); - return true; + struct edid *edid; + bool is_digital = false; + + edid = drm_get_edid(connector, + &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter); + /* + * This may be a DVI-I connector with a shared DDC + * link between analog and digital outputs, so we + * have to check the EDID input spec of the attached device. + */ + if (edid != NULL) { + is_digital = edid->input & DRM_EDID_INPUT_DIGITAL; + connector->display_info.raw_edid = NULL; + kfree(edid); + } + + if (!is_digital) { + DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); + return true; + } } return false; @@ -458,7 +478,7 @@ intel_crt_detect(struct drm_connector *connector, bool force) } } - if (intel_crt_detect_ddc(crt)) + if (intel_crt_detect_ddc(connector)) return connector_status_connected; if (!force) @@ -472,7 +492,7 @@ intel_crt_detect(struct drm_connector *connector, bool force) crtc = intel_get_load_detect_pipe(&crt->base, connector, NULL, &dpms_mode); if (crtc) { - if (intel_crt_detect_ddc(crt)) + if (intel_crt_detect_ddc(connector)) status = connector_status_connected; else status = intel_crt_load_detect(crtc, crt); |