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authorZhao Yakui <yakui.zhao@intel.com>2009-11-06 15:39:56 +0800
committerEric Anholt <eric@anholt.net>2009-12-01 10:33:12 -0800
commitd09c23de9f967a7b7dcee0ffc57222ddbd821aba (patch)
treec08d66c9fc61fe8ea6bd7614466b1ed9d099c018 /drivers/gpu/drm/i915/intel_sdvo.c
parent04b2d218001bdddb41b84c9f78d6bb3cd3b5b31c (diff)
drm/i915: Add 30ms delay to make SDVO TV detection reliable.
Without this, on some boots the TV wouldn't be detected. Testing showed 15ms to be insufficient. https://bugs.freedesktop.org/show_bug.cgi?id=24290 https://bugs.freedesktop.org/show_bug.cgi?id=20785 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Tested-by: Yan Seiner <yan@seiner.com> Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_sdvo.c')
-rw-r--r--drivers/gpu/drm/i915/intel_sdvo.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 55b8beb0a15..dba5147f406 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1617,6 +1617,10 @@ static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connect
intel_sdvo_write_cmd(intel_output,
SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0);
+ if (sdvo_priv->is_tv) {
+ /* add 30ms delay when the output type is SDVO-TV */
+ mdelay(30);
+ }
status = intel_sdvo_read_response(intel_output, &response, 2);
DRM_DEBUG_KMS("SDVO response %d %d\n", response & 0xff, response >> 8);