The mask of possible CRTCs that an output (DRM encoder) can be attached to is relative to the position within the DRM device's list of CRTCs. Deferred probing can cause this to not match the pipe number associated with a CRTC. Use the newly introduced drm_crtc_mask() to compute the mask by looking up the proper index of the given CRTC in the list.
Signed-off-by: Thierry Reding treding@nvidia.com --- This depends on the following patch:
[v3,1/3] drm: provide a helper for the encoder possible_crtcs mask
a copy of which can be found here:
https://patchwork.kernel.org/patch/3475421/
drivers/gpu/drm/tegra/rgb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c index 03885bb8dcc0..338f7f6561d7 100644 --- a/drivers/gpu/drm/tegra/rgb.c +++ b/drivers/gpu/drm/tegra/rgb.c @@ -258,7 +258,7 @@ int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc) * RGB outputs are an exception, so we make sure they can be attached * to only their parent display controller. */ - rgb->output.encoder.possible_crtcs = 1 << dc->pipe; + rgb->output.encoder.possible_crtcs = drm_crtc_mask(&dc->base);
return 0; }