drm/msm: dpu: Add modeset lock checks where applicable

Add modeset lock checks to functions that could be called outside the
core atomic stack.

Changes in v2:
- None

Reviewed-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 5745d46..2846506 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -284,6 +284,8 @@ enum dpu_intf_mode dpu_crtc_get_intf_mode(struct drm_crtc *crtc)
                return INTF_MODE_NONE;
        }
 
+       WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
+
        /* TODO: Returns the first INTF_MODE, could there be multiple values? */
        drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
                return dpu_encoder_get_intf_mode(encoder);

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 7085cde..fe98a39 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -358,6 +358,7 @@ void dpu_kms_encoder_enable(struct drm_encoder *encoder)
        if (funcs && funcs->commit)
                funcs->commit(encoder);
 
+       WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
        drm_for_each_crtc(crtc, dev) {
                if (!(crtc->state->encoder_mask & drm_encoder_mask(encoder)))
                        continue;