drm/i915/lvds: Remove 0xa0 DDC probe for LVDS

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / intel_lvds.c

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index bcdba7bd5cfafb26efa1b8f150530836d8cc5c71..a562bd2648c7bb76f2db4df8a167f755db57ae1b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -231,6 +231,7 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
        struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
        struct drm_encoder *tmp_encoder;
        u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
+       int pipe;
 
        /* Should never happen!! */
        if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
@@ -277,8 +278,8 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
         * to register description and PRM.
         * Change the value here to see the borders for debugging
         */
-       I915_WRITE(BCLRPAT_A, 0);
-       I915_WRITE(BCLRPAT_B, 0);
+       for_each_pipe(pipe)
+               I915_WRITE(BCLRPAT(pipe), 0);
 
        switch (intel_lvds->fitting_mode) {
        case DRM_MODE_SCALE_CENTER:
@@ -472,15 +473,13 @@ static enum drm_connector_status
 intel_lvds_detect(struct drm_connector *connector, bool force)
 {
        struct drm_device *dev = connector->dev;
-       enum drm_connector_status status = connector_status_connected;
+       enum drm_connector_status status;
 
-       /* ACPI lid methods were generally unreliable in this generation, so
-        * don't even bother.
-        */
-       if (IS_GEN2(dev) || IS_GEN3(dev))
-               return connector_status_connected;
+       status = intel_panel_detect(dev);
+       if (status != connector_status_unknown)
+               return status;
 
-       return status;
+       return connector_status_connected;
 }
 
 /**
@@ -496,7 +495,7 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
                return drm_add_edid_modes(connector, intel_lvds->edid);
 
        mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
-       if (mode == 0)
+       if (mode == NULL)
                return 0;
 
        drm_mode_probed_add(connector, mode);
@@ -830,25 +829,6 @@ static bool lvds_is_present_in_vbt(struct drm_device *dev,
        return false;
 }
 
-static bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin)
-{
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       u8 buf = 0;
-       struct i2c_msg msgs[] = {
-               {
-                       .addr = 0xA0,
-                       .flags = 0,
-                       .len = 1,
-                       .buf = &buf,
-               },
-       };
-       struct i2c_adapter *i2c = &dev_priv->gmbus[pin].adapter;
-       /* XXX this only appears to work when using GMBUS */
-       if (intel_gmbus_is_forced_bit(i2c))
-               return true;
-       return i2c_transfer(i2c, msgs, 1) == 1;
-}
-
 /**
  * intel_lvds_init - setup LVDS connectors on this device
  * @dev: drm device
@@ -889,11 +869,6 @@ bool intel_lvds_init(struct drm_device *dev)
                }
        }
 
-       if (!intel_lvds_ddc_probe(dev, pin)) {
-               DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
-               return false;
-       }
-
        intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
        if (!intel_lvds) {
                return false;