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authorChris Wilson <chris@chris-wilson.co.uk>2011-02-12 10:33:12 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2011-03-07 11:06:02 +0000
commit3d3dc149eda48566619d165f6b34e5eeca00edf1 (patch)
treeae12c801729053a5e6639ef46746ba07d8f8e9a4 /drivers/gpu
parenta7a75c8f70d6f6a2f16c9f627f938bbee2d32718 (diff)
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drm/i915/dp: Sanity check eDP existence
Some hardware claims to have both an LVDS panel and an eDP output. Whilst this may be true in a rare case, more often it is just broken hardware. If we see an eDP device we know that it must be connected and so we can confirm its existence with a simple probe. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34165 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=24822 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 3216adc..d29e33f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1856,6 +1856,9 @@ intel_dp_init(struct drm_device *dev, int output_reg)
if (!intel_dp)
return;
+ intel_dp->output_reg = output_reg;
+ intel_dp->dpms_mode = -1;
+
intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
if (!intel_connector) {
kfree(intel_dp);
@@ -1895,10 +1898,6 @@ intel_dp_init(struct drm_device *dev, int output_reg)
connector->interlace_allowed = true;
connector->doublescan_allowed = 0;
- intel_dp->output_reg = output_reg;
- intel_dp->has_audio = false;
- intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
-
drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
DRM_MODE_ENCODER_TMDS);
drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs);
@@ -1951,14 +1950,18 @@ intel_dp_init(struct drm_device *dev, int output_reg)
ret = intel_dp_aux_native_read(intel_dp, DP_DPCD_REV,
intel_dp->dpcd,
sizeof(intel_dp->dpcd));
+ ironlake_edp_panel_vdd_off(intel_dp);
if (ret == sizeof(intel_dp->dpcd)) {
if (intel_dp->dpcd[0] >= 0x11)
dev_priv->no_aux_handshake = intel_dp->dpcd[3] &
DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
} else {
+ /* if this fails, presume the device is a ghost */
DRM_ERROR("failed to retrieve link info\n");
+ intel_dp_destroy(&intel_connector->base);
+ intel_dp_encoder_destroy(&intel_dp->base.base);
+ return;
}
- ironlake_edp_panel_vdd_off(intel_dp);
}
intel_encoder->hot_plug = intel_dp_hot_plug;