[v2,16/24] drm/msm: dpu: Add modeset lock checks where applicable

Submitted by Sean Paul on Nov. 16, 2018, 6:42 p.m.

Details

Message ID 20181116184238.170034-17-sean@poorly.run
State New
Headers show
Series "drm/msm: Various dpu locking and legacy cleanups" ( rev: 2 1 ) in DRI devel

Commit Message

Sean Paul Nov. 16, 2018, 6:42 p.m.
From: Sean Paul <seanpaul@chromium.org>

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

Changes in v2:
- None

Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
 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(+)

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diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index a008a87a8113..cd0a0bea4335 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 64134d619748..5104fc01147e 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;

Comments

On 2018-11-16 10:42, Sean Paul wrote:
> From: Sean Paul <seanpaul@chromium.org>
> 
> Add modeset lock checks to functions that could be called outside the
> core atomic stack.
> 
> Changes in v2:
> - None
> 
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> ---

Reviewed-by: Jeykumar Sankaran <jsanka@codeaurora.org>

>  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 a008a87a8113..cd0a0bea4335 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 64134d619748..5104fc01147e 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;