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| author | Thierry Reding <treding@nvidia.com> | 2014-01-09 17:08:36 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-01-23 15:51:32 +0100 |
| commit | 13411ddd319057ae334a4084ebcf2c741b317f34 (patch) | |
| tree | 9915698fb7fe169acd53b9b7f75347524ed04a98 /include/drm/drm_crtc.h | |
| parent | 70bf6878a874523e4b62992d07b5739298f8c1eb (diff) | |
| download | linux-stable-13411ddd319057ae334a4084ebcf2c741b317f34.tar.gz linux-stable-13411ddd319057ae334a4084ebcf2c741b317f34.tar.bz2 linux-stable-13411ddd319057ae334a4084ebcf2c741b317f34.zip | |
drm/tegra: Obtain head number from DT
The head number of a given display controller is fixed in hardware and
required to program outputs appropriately. Relying on the driver probe
order to determine this number will not work, since that could yield a
situation where the second head was probed first and would be assigned
head number 0 instead of 1.
By explicitly specifying the head number in the device tree, it is no
longer necessary to rely on these assumptions. As a fallback, if the
property isn't available, derive the head number from the display
controller node's position in the device tree. That's somewhat more
reliable than the previous default but not a proper solution.
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include/drm/drm_crtc.h')
0 files changed, 0 insertions, 0 deletions