[PATCH] i915: Fix SDVO potentially turning off randomly

[Guillaume Clement]

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 at baobob.org>
---
 drivers/gpu/drm/i915/intel_sdvo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c 
b/drivers/gpu/drm/i915/intel_sdvo.c
index 798df11..a5a2192 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -539,7 +539,8 @@ 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
-- 
1.8.1.5