[PATCH 17/26] drm/fsl-du: Implement some semblance of vblank event handling

Daniel Vetter
2016-05-29T18:35:14Z

No idea how exactly fsl-du commits hw state changes, but here in flush
is probably the safest place.

While at it nuke the dummy functions.

v2: Be more robust and either arm, when the CRTC is on, or just send
the event out right away.

Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
index 89c0084c2814..706de3278f1c 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c
@@ -22,20 +22,21 @@
#include "fsl_dcu_drm_drv.h"
#include "fsl_dcu_drm_plane.h"

-static void fsl_dcu_drm_crtc_atomic_begin(struct drm_crtc *crtc,
+static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
-}
+ struct drm_pending_vblank_event *event = crtc->state->event;

-static int fsl_dcu_drm_crtc_atomic_check(struct drm_crtc *crtc,
- struct drm_crtc_state *state)
-{
- return 0;
-}
+ if (event) {
+ crtc->state->event = NULL;

-static void fsl_dcu_drm_crtc_atomic_flush(struct drm_crtc *crtc,
- struct drm_crtc_state *old_crtc_state)
-{
+ spin_lock_irq(&crtc->dev->event_lock);
+ if (drm_crtc_vblank_get(crtc) == 0)
+ drm_crtc_arm_vblank_event(crtc, event);
+ else
+ drm_crtc_send_vblank_event(crtc, event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ }
}

static void fsl_dcu_drm_disable_crtc(struct drm_crtc *crtc)
@@ -117,8 +118,6 @@ static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
}

static const struct drm_crtc_helper_funcs fsl_dcu_drm_crtc_helper_funcs = {
- .atomic_begin = fsl_dcu_drm_crtc_atomic_begin,
- .atomic_check = fsl_dcu_drm_crtc_atomic_check,
.atomic_flush = fsl_dcu_drm_crtc_atomic_flush,
.disable = fsl_dcu_drm_disable_crtc,
.enable = fsl_dcu_drm_crtc_enable,
--
2.8.1

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