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i915: Fix SDVO potentially turning off randomly

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Some Poulsbo cards seem to incorrectly report
SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED instead of
SDVO_CMD_STATUS_PENDING, which causes the display to be turned off.

This could also happen to i915.

Signed-off-by: Guillaume Clement <gclement@baobob.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Guillaume Clement 2013-08-10 21:57:57 +02:00 committed by Daniel Vetter
parent 7ace7ef2f5
commit 1ad87e72b5
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/intel_sdvo.c
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@ -538,7 +538,8 @@ static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
&status))
goto log_fail;
while (status == SDVO_CMD_STATUS_PENDING && --retry) {
while ((status == SDVO_CMD_STATUS_PENDING ||
status == SDVO_CMD_STATUS_TARGET_NOT_SPECIFIED) && --retry) {
if (retry < 10)
msleep(15);
else