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| author | Aaron Lu | 2013-08-02 03:16:03 +0200 |
|---|---|---|
| committer | Daniel Vetter | 2013-08-07 11:57:08 +0200 |
| commit | 22505b82a2800bddb67908522833bef96dd15845 (patch) | |
| tree | 40de131f1ed5a141107afccfaf2ab7a6db0ba535 /Documentation/video-output.txt | |
| parent | drm/i915: update last_vblank when disabling the power well (diff) | |
| download | kernel-qcow2-linux-22505b82a2800bddb67908522833bef96dd15845.tar.gz kernel-qcow2-linux-22505b82a2800bddb67908522833bef96dd15845.tar.xz kernel-qcow2-linux-22505b82a2800bddb67908522833bef96dd15845.zip | |
drm/i915: avoid brightness overflow when doing scale
Some card's max brightness level is pretty large, e.g. on Acer Aspire
4732Z, the max level is 989910. If user space set a large enough level
then the current scale done in intel_panel_set_backlight will cause an
integer overflow and the scaled level will be mistakenly small, leaving
user with an almost black screen. This patch fixes this problem.
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
[danvet: Add a comment to explain what's going on.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'Documentation/video-output.txt')
0 files changed, 0 insertions, 0 deletions