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| author | Ville Syrjälä <[email protected]> | 2014-11-07 15:18:45 +0200 |
|---|---|---|
| committer | Daniel Vetter <[email protected]> | 2014-11-14 10:29:19 +0100 |
| commit | 2d72f6c7be9cd26485f88961f6a56fae3d9d17e9 (patch) | |
| tree | 60b58af15ee2d193825f59262a2a367287191b94 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | 23ec0a8835f38c6e43570b54a786e058a9b9a268 (diff) | |
drm/i915: Skip .get_backlight() when backlight isn't enabled
On VLV/CHV when the display is off, we can't read out the current
backlight level from the hardware since we have no pipe to do so.
Currently we end up reading a bigus register due to passing
INVALID_PIPE to VLV_BLC_PWM_CTL().
Skip the entire .get_backlight() call if the backlight isn't enabled
according to backlight.enabled.
This problem can be reproduced simply by reading the backlight device
actual_brightness file while the display is off.
Cc: Jani Nikula <[email protected]>
Suggested-by: Jani Nikula <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions