On monitor hot removal:
1) clear SDVO_AUDIO_ENABLE or DP_AUDIO_OUTPUT_ENABLE
2) clear ELD Valid bit
So that the audio driver will receive hot plug events and take action to
refresh its device state and ELD contents.
cc: Wang Zhenyu <zhenyu.z.wang@xxxxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
drivers/gpu/drm/drm_crtc_helper.c | 4 ++++
drivers/gpu/drm/i915/intel_dp.c | 17 +++++++++++++++++
drivers/gpu/drm/i915/intel_hdmi.c | 17 +++++++++++++++++
include/drm/drm_crtc.h | 1 +
4 files changed, 39 insertions(+)
--- linux.orig/drivers/gpu/drm/i915/intel_dp.c 2011-11-16 21:36:58.000000000 +0800
+++ linux/drivers/gpu/drm/i915/intel_dp.c 2011-11-16 21:37:00.000000000 +0800
@@ -1984,6 +1984,22 @@ intel_dp_detect(struct drm_connector *co
return connector_status_connected;
}
+static void intel_dp_hot_remove(struct drm_connector *connector)
+{
+ struct intel_dp *intel_dp = intel_attached_dp(connector);
+ struct drm_device *dev = intel_dp->base.base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc = intel_dp->base.base.crtc;
+
+ intel_dp->DP &= ~DP_AUDIO_OUTPUT_ENABLE;
+ I915_WRITE(intel_dp->output_reg, intel_dp->DP);
+ POSTING_READ(intel_dp->output_reg);
+
+ connector->eld[0] = 0;
+ if (dev_priv->display.write_eld)
+ dev_priv->display.write_eld(connector, crtc);
+}
+
static int intel_dp_get_modes(struct drm_connector *connector)
{
struct intel_dp *intel_dp = intel_attached_dp(connector);
@@ -2143,6 +2159,7 @@ static const struct drm_connector_funcs
.detect = intel_dp_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = intel_dp_set_property,
+ .hot_remove = intel_dp_hot_remove,
.destroy = intel_dp_destroy,
};
--- linux.orig/drivers/gpu/drm/i915/intel_hdmi.c 2011-11-16 21:36:58.000000000 +0800
+++ linux/drivers/gpu/drm/i915/intel_hdmi.c 2011-11-16 21:37:00.000000000 +0800
@@ -350,6 +350,22 @@ intel_hdmi_detect(struct drm_connector *
return status;
}
+static void intel_hdmi_hot_remove(struct drm_connector *connector)
+{
+ struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
+ struct drm_i915_private *dev_priv = connector->dev->dev_private;
+ u32 temp;
+
+ temp = I915_READ(intel_hdmi->sdvox_reg);
+ I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_AUDIO_ENABLE);
+ POSTING_READ(intel_hdmi->sdvox_reg);
+
+ connector->eld[0] = 0;
+ if (dev_priv->display.write_eld)
+ dev_priv->display.write_eld(connector,
+ intel_hdmi->base.base.crtc);
+}
+
static int intel_hdmi_get_modes(struct drm_connector *connector)
{
struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
@@ -459,6 +475,7 @@ static const struct drm_connector_funcs
.detect = intel_hdmi_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = intel_hdmi_set_property,
+ .hot_remove = intel_hdmi_hot_remove,
.destroy = intel_hdmi_destroy,
};
--- linux.orig/drivers/gpu/drm/drm_crtc_helper.c 2011-11-16 21:36:58.000000000 +0800
+++ linux/drivers/gpu/drm/drm_crtc_helper.c 2011-11-16 21:37:00.000000000 +0800
@@ -905,6 +905,10 @@ static void output_poll_execute(struct w
old_status, connector->status);
if (old_status != connector->status)
changed = true;
+ if (old_status == connector_status_connected &&
+ connector->status == connector_status_disconnected)
+ connector->funcs->hot_remove(connector);
+
}
mutex_unlock(&dev->mode_config.mutex);
--- linux.orig/include/drm/drm_crtc.h 2011-11-16 21:36:58.000000000 +0800
+++ linux/include/drm/drm_crtc.h 2011-11-16 21:37:00.000000000 +0800
@@ -419,6 +419,7 @@ struct drm_connector_funcs {
int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
int (*set_property)(struct drm_connector *connector, struct drm_property *property,
uint64_t val);
+ void (*hot_remove)(struct drm_connector *connector);
void (*destroy)(struct drm_connector *connector);
void (*force)(struct drm_connector *connector);
};
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