[Freedreno] [PATCH v2 13/24] drm/msm: dpu: Don't drop locks in crtc_vblank_enable
From: Sean Paul Now that runtime resume is handled in encoder, we don't need to worry about crtc_lock recursion when calling pm_runtime_(get|put). So drop the lock drops in _dpu_crtc_vblank_enable_no_lock(). Changes in v2: - None Signed-off-by: Sean Paul --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 6 -- 1 file changed, 6 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index 9be24907f8c1..80de5289ada3 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -777,10 +777,7 @@ static void _dpu_crtc_vblank_enable_no_lock( struct drm_encoder *enc; if (enable) { - /* drop lock since power crtc cb may try to re-acquire lock */ - mutex_unlock(&dpu_crtc->crtc_lock); pm_runtime_get_sync(dev->dev); - mutex_lock(&dpu_crtc->crtc_lock); list_for_each_entry(enc, &dev->mode_config.encoder_list, head) { if (enc->crtc != crtc) @@ -805,10 +802,7 @@ static void _dpu_crtc_vblank_enable_no_lock( dpu_encoder_register_vblank_callback(enc, NULL, NULL); } - /* drop lock since power crtc cb may try to re-acquire lock */ - mutex_unlock(&dpu_crtc->crtc_lock); pm_runtime_put_sync(dev->dev); - mutex_lock(&dpu_crtc->crtc_lock); } } -- Sean Paul, Software Engineer, Google / Chromium OS ___ Freedreno mailing list Freedreno@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/freedreno
Re: [Freedreno] [PATCH v2 13/24] drm/msm: dpu: Don't drop locks in crtc_vblank_enable
On 2018-11-16 10:42, Sean Paul wrote: From: Sean Paul Now that runtime resume is handled in encoder, we don't need to worry about crtc_lock recursion when calling pm_runtime_(get|put). So drop the lock drops in _dpu_crtc_vblank_enable_no_lock(). Changes in v2: - None Signed-off-by: Sean Paul Reviewed-by: Jeykumar Sankaran --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 6 -- 1 file changed, 6 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index 9be24907f8c1..80de5289ada3 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -777,10 +777,7 @@ static void _dpu_crtc_vblank_enable_no_lock( struct drm_encoder *enc; if (enable) { - /* drop lock since power crtc cb may try to re-acquire lock */ - mutex_unlock(&dpu_crtc->crtc_lock); pm_runtime_get_sync(dev->dev); - mutex_lock(&dpu_crtc->crtc_lock); list_for_each_entry(enc, &dev->mode_config.encoder_list, head) { if (enc->crtc != crtc) @@ -805,10 +802,7 @@ static void _dpu_crtc_vblank_enable_no_lock( dpu_encoder_register_vblank_callback(enc, NULL, NULL); } - /* drop lock since power crtc cb may try to re-acquire lock */ - mutex_unlock(&dpu_crtc->crtc_lock); pm_runtime_put_sync(dev->dev); - mutex_lock(&dpu_crtc->crtc_lock); } } -- Jeykumar S ___ Freedreno mailing list Freedreno@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/freedreno