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drm/i915/sdvo: Always add a 30ms delay to make SDVO TV detection reliable 

Commit d09c23de intended to add a 30ms delay to give the ADD time to
detect any TVs connected. However, it used the sdvo->is_tv flag to do so
which is dependent upon the previous detection result and not whether the
output supports TVs.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
This commit is contained in:
Chris Wilson 2010-11-24 17:37:17 +00:00
parent cc840f7703
commit ba84cd1f2b
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/i915/intel_sdvo.c
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@ -1377,10 +1377,12 @@ intel_sdvo_detect(struct drm_connector *connector, bool force)
if (!intel_sdvo_write_cmd(intel_sdvo,
SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0))
return connector_status_unknown;
if (intel_sdvo->is_tv) {
/* add 30ms delay when the output type is SDVO-TV */
/* add 30ms delay when the output type might be TV */
if (intel_sdvo->caps.output_flags &
(SDVO_OUTPUT_SVID0 | SDVO_OUTPUT_CVBS0))
mdelay(30);
}
if (!intel_sdvo_read_response(intel_sdvo, &response, 2))
return connector_status_unknown;