Attachment 33189 Details for Bug 26395 – Ignore the LVDS edid when it is unavailable or invalid

[patch] Ignore the LVDS edid when it is unavailable or invalid

0001_lvds_bad_edid.patch (text/plain), 2.00 KB, created by ykzhao on 2010-02-08 23:12:03 UTC

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Creator: ykzhao

Created: 2010-02-08 23:12:03 UTC

Size: 2.00 KB

patch

obsolete

>Subject: [Patch] drm/i915: Ignore LVDS EDID when it is unavailabe or invalid
>From: Zhao Yakui <yakui.zhao@intel.com>
>
>Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
>---
> drivers/gpu/drm/i915/i915_drv.h   |    1 +
> drivers/gpu/drm/i915/intel_lvds.c |   18 ++++++++++++++----
> 2 files changed, 15 insertions(+), 4 deletions(-)
>
>Index: linux-2.6/drivers/gpu/drm/i915/i915_drv.h
>===================================================================
>--- linux-2.6.orig/drivers/gpu/drm/i915/i915_drv.h	2010-02-08 20:18:39.000000000 +0800
>+++ linux-2.6/drivers/gpu/drm/i915/i915_drv.h	2010-02-09 14:57:12.000000000 +0800
>@@ -563,6 +563,7 @@
> 		struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT];
> 	} mm;
> 	struct sdvo_device_mapping sdvo_mappings[2];
>+	bool	lvds_edid_avail;
> 	/* indicate whether the LVDS_BORDER should be enabled or not */
> 	unsigned int lvds_border_bits;
> 
>Index: linux-2.6/drivers/gpu/drm/i915/intel_lvds.c
>===================================================================
>--- linux-2.6.orig/drivers/gpu/drm/i915/intel_lvds.c	2010-02-08 20:18:39.000000000 +0800
>+++ linux-2.6/drivers/gpu/drm/i915/intel_lvds.c	2010-02-09 14:58:09.000000000 +0800
>@@ -659,10 +659,13 @@
> 	struct drm_i915_private *dev_priv = dev->dev_private;
> 	int ret = 0;
> 
>-	ret = intel_ddc_get_modes(intel_output);
>+	if (dev_priv->lvds_edid_avail) {
>+		ret = intel_ddc_get_modes(intel_output);
>+		if (ret)
>+			return ret;
> 
>-	if (ret)
>-		return ret;
>+		dev_priv->lvds_edid_avail = 0;
>+	}
> 
> 	/* Didn't get an EDID, so
> 	 * Set wide sync ranges so we get all modes
>@@ -1071,11 +1074,18 @@
> 		goto failed;
> 	}
> 
>+	dev_priv->lvds_edid_avail = 1;
> 	/*
> 	 * Attempt to get the fixed panel mode from DDC.  Assume that the
> 	 * preferred mode is the right one.
> 	 */
>-	intel_ddc_get_modes(intel_output);
>+	if (dev_priv->lvds_edid_avail) {
>+		int ret;
>+
>+		ret = intel_ddc_get_modes(intel_output);
>+		if (ret == 0)
>+			dev_priv->lvds_edid_avail = 0;
>+	}
> 
> 	list_for_each_entry(scan, &connector->probed_modes, head) {
> 		mutex_lock(&dev->mode_config.mutex);

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Attachments on bug 26395: 33012 | 33013 | 33144 | 33189 | 33484

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