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drm/edid: Clear the old hdmi info before parsing display info

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The current EDID might not support advanced HDMI 2.0 features.
Leaving old hdmi info in the drm_display_info will make display
work not okay, when switching display from HDMI 2.0 device to
HDMI 1.4 device.

Change-Id: Ifaf11a115580a93ec00160d54f0d453842d7b484
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
This commit is contained in:
Zheng Yang
2017-06-28 10:58:36 +08:00
committed by Algea Cao
parent 392c7373ab
commit dd9c925069
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/drm_edid.c
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@@ -4556,6 +4556,8 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi
DRM_DEBUG_KMS("non_desktop set to %d\n", info->non_desktop);
memset(&info->hdmi, 0, sizeof(info->hdmi));
if (edid->revision < 3)
return quirks;