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drm/i915: rip out dp port enabling cludges^Wchecks

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These have been added because dp links are fiddle things and don't
like it when we try to re-train an enabled output (or disable a
disabled output harder). And because the crtc helper code is
ridiculously bad add tracking the modeset state.

But with the new code in place it is simply a bug to disable a disabled
encoder or to enable an enabled encoder again. Hence convert these to
WARNs (and bail out for safety), but flatten all conditionals in the
code itself.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-09-06 22:15:43 +02:00
parent 0767935e86
commit 0c33d8d7cc
1 changed files with 8 additions and 8 deletions
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16
drivers/gpu/drm/i915/intel_dp.c
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@ -1333,15 +1333,15 @@ static void intel_enable_dp(struct intel_encoder *encoder)
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
if (WARN_ON(dp_reg & DP_PORT_EN))
return;
ironlake_edp_panel_vdd_on(intel_dp);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
if (!(dp_reg & DP_PORT_EN)) {
intel_dp_start_link_train(intel_dp);
ironlake_edp_panel_on(intel_dp);
ironlake_edp_panel_vdd_off(intel_dp, true);
intel_dp_complete_link_train(intel_dp);
} else
ironlake_edp_panel_vdd_off(intel_dp, false);
intel_dp_start_link_train(intel_dp);
ironlake_edp_panel_on(intel_dp);
ironlake_edp_panel_vdd_off(intel_dp, true);
intel_dp_complete_link_train(intel_dp);
ironlake_edp_backlight_on(intel_dp);
}
@ -1900,7 +1900,7 @@ intel_dp_link_down(struct intel_dp *intel_dp)
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t DP = intel_dp->DP;
if ((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)
if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
return;
DRM_DEBUG_KMS("\n");