From 1dfdb0e107dbe6ebff3f6bbbe4aad0b5aa87bba4 Mon Sep 17 00:00:00 2001
From: Sean Paul <seanpaul@chromium.org>
Date: Fri, 16 Nov 2018 13:42:26 -0500
Subject: [PATCH] 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>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 ++
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 5745d46a7858c..28465063e345d 100644
--- 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 7085cde868be1..fe98a39eaae5a 100644
--- 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;
--
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