[PATCH v3 14/24] drm/msm: dpu: Grab the modeset locks in frame_event

[Sean Paul]

From: Sean Paul <seanpaul at chromium.org>

This patch wraps dpu_core_perf_crtc_release_bw() with modeset locks
since it digs into the state objects.

Changes in v2:
- None
Changes in v3:
- Use those nifty new DRM_MODESET_LOCK_ALL_* helpers (Daniel)

Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Jeykumar Sankaran <jsanka at codeaurora.org>
Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 74ef384d9cd6a..03ddd281a354f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -306,6 +306,19 @@ static void dpu_crtc_vblank_cb(void *data)
 	trace_dpu_crtc_vblank_cb(DRMID(crtc));
 }
 
+static void dpu_crtc_release_bw_unlocked(struct drm_crtc *crtc)
+{
+	int ret = 0;
+	struct drm_modeset_acquire_ctx ctx;
+
+	DRM_MODESET_LOCK_ALL_BEGIN(crtc->dev, ctx, 0, ret);
+	dpu_core_perf_crtc_release_bw(crtc);
+	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	if (ret)
+		DRM_ERROR("Failed to acquire modeset locks to release bw, %d\n",
+			  ret);
+}
+
 static void dpu_crtc_frame_event_work(struct kthread_work *work)
 {
 	struct dpu_crtc_frame_event *fevent = container_of(work,
@@ -335,7 +348,7 @@ static void dpu_crtc_frame_event_work(struct kthread_work *work)
 			/* release bandwidth and other resources */
 			trace_dpu_crtc_frame_event_done(DRMID(crtc),
 							fevent->event);
-			dpu_core_perf_crtc_release_bw(crtc);
+			dpu_crtc_release_bw_unlocked(crtc);
 		} else {
 			trace_dpu_crtc_frame_event_more_pending(DRMID(crtc),
 								fevent->event);
-- 
Sean Paul, Software Engineer, Google / Chromium OS