@@ -621,6 +621,7 @@ static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
rcar_du_crtc_write(rcrtc, DSRCR, DSRCR_VBCL);
rcar_du_crtc_set(rcrtc, DIER, DIER_FRE);
+ rcrtc->vblank_enable = true;
return 0;
}
@@ -629,6 +630,7 @@ static void rcar_du_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ rcrtc->vblank_enable = false;
rcar_du_crtc_clr(rcrtc, DIER, DIER_FRE);
}
@@ -658,10 +660,14 @@ static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
rcar_du_crtc_write(rcrtc, DSRCR, status & DSRCR_MASK);
if (status & DSSR_FRM) {
- drm_crtc_handle_vblank(&rcrtc->crtc);
-
- if (rcdu->info->gen < 3)
+ /*
+ * Gen 3 vblank and page flips are handled through the VSP
+ * completion handler
+ */
+ if (rcdu->info->gen < 3) {
+ drm_crtc_handle_vblank(&rcrtc->crtc);
rcar_du_crtc_finish_page_flip(rcrtc);
+ }
ret = IRQ_HANDLED;
}
@@ -735,6 +741,15 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
/* Start with vertical blanking interrupt reporting disabled. */
drm_crtc_vblank_off(crtc);
+ /*
+ * DU with a VSP1 source uses the VSP1 frame completion event to handle
+ * vblanking and page flipping events.
+ *
+ * Do not register the IRQ handler in this instance.
+ */
+ if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE))
+ return 0;
+
/* Register the interrupt handler. */
if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) {
irq = platform_get_irq(pdev, index);
@@ -31,6 +31,7 @@ struct rcar_du_vsp;
* @mmio_offset: offset of the CRTC registers in the DU MMIO block
* @index: CRTC software and hardware index
* @started: whether the CRTC has been started and is running
+ * @vblank_enable: whether vblank events are enabled on this CRTC
* @event: event to post when the pending page flip completes
* @flip_wait: wait queue used to signal page flip completion
* @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
@@ -45,6 +46,7 @@ struct rcar_du_crtc {
unsigned int index;
bool started;
+ bool vblank_enable;
struct drm_pending_vblank_event *event;
wait_queue_head_t flip_wait;
@@ -30,11 +30,15 @@
#include "rcar_du_kms.h"
#include "rcar_du_vsp.h"
-static void rcar_du_vsp_complete(void *private)
+static void rcar_du_vsp_complete(void *private, bool completed)
{
struct rcar_du_crtc *crtc = private;
- rcar_du_crtc_finish_page_flip(crtc);
+ if (crtc->vblank_enable)
+ drm_crtc_handle_vblank(&crtc->crtc);
+
+ if (completed)
+ rcar_du_crtc_finish_page_flip(crtc);
}
void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
@@ -37,12 +37,13 @@ void vsp1_drm_display_start(struct vsp1_device *vsp1)
vsp1_dlm_irq_display_start(vsp1->drm->pipe.output->dlm);
}
-static void vsp1_du_pipeline_frame_end(struct vsp1_pipeline *pipe)
+static void vsp1_du_pipeline_frame_end(struct vsp1_pipeline *pipe,
+ bool completed)
{
struct vsp1_drm *drm = to_vsp1_drm(pipe);
if (drm->du_complete)
- drm->du_complete(drm->du_private);
+ drm->du_complete(drm->du_private, completed);
}
/* -----------------------------------------------------------------------------
@@ -37,7 +37,7 @@ struct vsp1_drm {
} inputs[VSP1_MAX_RPF];
/* Frame synchronisation */
- void (*du_complete)(void *);
+ void (*du_complete)(void *, bool);
void *du_private;
};
@@ -335,16 +335,12 @@ void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
if (pipe == NULL)
return;
+ /*
+ * If the DL commit raced with the frame end interrupt, the commit ends
+ * up being postponed by one frame. @completed represents whether the
+ * active frame was finished or postponed.
+ */
completed = vsp1_dlm_irq_frame_end(pipe->output->dlm);
- if (!completed) {
- /*
- * If the DL commit raced with the frame end interrupt, the
- * commit ends up being postponed by one frame. Return
- * immediately without calling the pipeline's frame end handler
- * or incrementing the sequence number.
- */
- return;
- }
if (pipe->hgo)
vsp1_hgo_frame_end(pipe->hgo);
@@ -352,8 +348,12 @@ void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
if (pipe->hgt)
vsp1_hgt_frame_end(pipe->hgt);
+ /*
+ * Regardless of frame completion we still need to notify the pipe
+ * frame_end to account for vblank events.
+ */
if (pipe->frame_end)
- pipe->frame_end(pipe);
+ pipe->frame_end(pipe, completed);
pipe->sequence++;
}
@@ -91,7 +91,7 @@ struct vsp1_pipeline {
enum vsp1_pipeline_state state;
wait_queue_head_t wq;
- void (*frame_end)(struct vsp1_pipeline *pipe);
+ void (*frame_end)(struct vsp1_pipeline *pipe, bool completed);
struct mutex lock;
struct kref kref;
@@ -440,13 +440,17 @@ static void vsp1_video_pipeline_run(struct vsp1_pipeline *pipe)
vsp1_pipeline_run(pipe);
}
-static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe)
+static void vsp1_video_pipeline_frame_end(struct vsp1_pipeline *pipe,
+ bool completed)
{
struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
enum vsp1_pipeline_state state;
unsigned long flags;
unsigned int i;
+ /* M2M Pipelines should never call here with an incomplete frame */
+ WARN_ON_ONCE(!completed);
+
spin_lock_irqsave(&pipe->irqlock, flags);
/* Complete buffers on all video nodes. */
@@ -34,7 +34,7 @@ struct vsp1_du_lif_config {
unsigned int width;
unsigned int height;
- void (*callback)(void *);
+ void (*callback)(void *, bool);
void *callback_data;
};
A recent change to the frame completion handling has changed the order in which the vblank timestamps are updated. To fix this requires handling the vblank events on the frame end event which comes from the VSP1 driver on Gen3 instead. Prevent the CRTC IRQ from being enabled on Gen3 hardware and handle vblank events through the existing rcar_du_vsp_complete() callback. The addition of this callback was to provide notification of frame completions in the event of a race. Further extend the DU callback to provide notification as to whether the frame was completed or not, allowing the callback to act as a full vblank interrupt notifier. The VSP frame end interrupt occurs approximately 50 µs earlier than the DU frame end interrupt, but this should not cause any undue harm. Fixes: d503a43ac06a ("drm: rcar-du: Register a completion callback with VSP1") Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> --- drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 21 ++++++++++++++++++--- drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 ++ drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 8 ++++++-- drivers/media/platform/vsp1/vsp1_drm.c | 5 +++-- drivers/media/platform/vsp1/vsp1_drm.h | 2 +- drivers/media/platform/vsp1/vsp1_pipe.c | 20 ++++++++++---------- drivers/media/platform/vsp1/vsp1_pipe.h | 2 +- drivers/media/platform/vsp1/vsp1_video.c | 6 +++++- include/media/vsp1.h | 2 +- 9 files changed, 47 insertions(+), 21 deletions(-)