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* [RESEND][PATCH] drm/tilcdc: send vblank event when disabling crtc
@ 2021-02-09  8:24 ` quanyang.wang
  0 siblings, 0 replies; 4+ messages in thread
From: quanyang.wang @ 2021-02-09  8:24 UTC (permalink / raw)
  To: Jyri Sarha, Tomi Valkeinen, David Airlie, Daniel Vetter
  Cc: dri-devel, linux-kernel, quanyang.wang

From: Quanyang Wang <quanyang.wang@windriver.com>

When run xrandr to change resolution on Beaglebone Black board, it will
print the error information:

root@beaglebone:~# xrandr -display :0 --output HDMI-1 --mode 720x400
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:32:tilcdc crtc] commit wait timed out
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:34:HDMI-A-1] commit wait timed out
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:31:plane-0] commit wait timed out
tilcdc 4830e000.lcdc: already pending page flip!

This is because there is operation sequence as below:

drm_atomic_connector_commit_dpms(mode is DRM_MODE_DPMS_OFF):
    ...
    drm_atomic_helper_setup_commit <- init_completion(commit_A->flip_done)
    drm_atomic_helper_commit_tail
        tilcdc_crtc_atomic_disable
        tilcdc_plane_atomic_update <- drm_crtc_send_vblank_event in tilcdc_crtc_irq
                                      is skipped since tilcdc_crtc->enabled is 0
        tilcdc_crtc_atomic_flush   <- drm_crtc_send_vblank_event is skipped since
                                      crtc->state->event is set to be NULL in
                                      tilcdc_plane_atomic_update
drm_mode_setcrtc:
    ...
    drm_atomic_helper_setup_commit <- init_completion(commit_B->flip_done)
    drm_atomic_helper_wait_for_dependencies
        drm_crtc_commit_wait   <- wait for commit_A->flip_done completing

Just as shown above, the steps which could complete commit_A->flip_done
are all skipped and commit_A->flip_done will never be completed. This will
result a time-out ERROR when drm_crtc_commit_wait check the commit_A->flip_done.
So add drm_crtc_send_vblank_event in tilcdc_crtc_atomic_disable to
complete commit_A->flip_done.

Fixes: cb345decb4d2 ("drm/tilcdc: Use standard drm_atomic_helper_commit")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 30213708fc99..d99afd19ca08 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -515,6 +515,15 @@ static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown)
 
 	drm_crtc_vblank_off(crtc);
 
+	spin_lock_irq(&crtc->dev->event_lock);
+
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+
+	spin_unlock_irq(&crtc->dev->event_lock);
+
 	tilcdc_crtc_disable_irqs(dev);
 
 	pm_runtime_put_sync(dev->dev);
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [RESEND][PATCH] drm/tilcdc: send vblank event when disabling crtc
@ 2021-02-09  8:24 ` quanyang.wang
  0 siblings, 0 replies; 4+ messages in thread
From: quanyang.wang @ 2021-02-09  8:24 UTC (permalink / raw)
  To: Jyri Sarha, Tomi Valkeinen, David Airlie, Daniel Vetter
  Cc: linux-kernel, dri-devel, quanyang.wang

From: Quanyang Wang <quanyang.wang@windriver.com>

When run xrandr to change resolution on Beaglebone Black board, it will
print the error information:

root@beaglebone:~# xrandr -display :0 --output HDMI-1 --mode 720x400
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:32:tilcdc crtc] commit wait timed out
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:34:HDMI-A-1] commit wait timed out
[drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:31:plane-0] commit wait timed out
tilcdc 4830e000.lcdc: already pending page flip!

This is because there is operation sequence as below:

drm_atomic_connector_commit_dpms(mode is DRM_MODE_DPMS_OFF):
    ...
    drm_atomic_helper_setup_commit <- init_completion(commit_A->flip_done)
    drm_atomic_helper_commit_tail
        tilcdc_crtc_atomic_disable
        tilcdc_plane_atomic_update <- drm_crtc_send_vblank_event in tilcdc_crtc_irq
                                      is skipped since tilcdc_crtc->enabled is 0
        tilcdc_crtc_atomic_flush   <- drm_crtc_send_vblank_event is skipped since
                                      crtc->state->event is set to be NULL in
                                      tilcdc_plane_atomic_update
drm_mode_setcrtc:
    ...
    drm_atomic_helper_setup_commit <- init_completion(commit_B->flip_done)
    drm_atomic_helper_wait_for_dependencies
        drm_crtc_commit_wait   <- wait for commit_A->flip_done completing

Just as shown above, the steps which could complete commit_A->flip_done
are all skipped and commit_A->flip_done will never be completed. This will
result a time-out ERROR when drm_crtc_commit_wait check the commit_A->flip_done.
So add drm_crtc_send_vblank_event in tilcdc_crtc_atomic_disable to
complete commit_A->flip_done.

Fixes: cb345decb4d2 ("drm/tilcdc: Use standard drm_atomic_helper_commit")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 30213708fc99..d99afd19ca08 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -515,6 +515,15 @@ static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown)
 
 	drm_crtc_vblank_off(crtc);
 
+	spin_lock_irq(&crtc->dev->event_lock);
+
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+
+	spin_unlock_irq(&crtc->dev->event_lock);
+
 	tilcdc_crtc_disable_irqs(dev);
 
 	pm_runtime_put_sync(dev->dev);
-- 
2.25.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply related	[flat|nested] 4+ messages in thread
* Re: [RESEND][PATCH] drm/tilcdc: send vblank event when disabling crtc
  2021-02-09  8:24 ` quanyang.wang
@ 2021-02-09 21:38   ` Jyri Sarha
  -1 siblings, 0 replies; 4+ messages in thread
From: Jyri Sarha @ 2021-02-09 21:38 UTC (permalink / raw)
  To: quanyang.wang
  Cc: Tomi Valkeinen, David Airlie, Daniel Vetter, dri-devel, linux-kernel

On 2021-02-09 10:24, quanyang.wang@windriver.com wrote:
> From: Quanyang Wang <quanyang.wang@windriver.com>
> 
> When run xrandr to change resolution on Beaglebone Black board, it will
> print the error information:
> 
> root@beaglebone:~# xrandr -display :0 --output HDMI-1 --mode 720x400
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:32:tilcdc
> crtc] commit wait timed out
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR*
> [CONNECTOR:34:HDMI-A-1] commit wait timed out
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR*
> [PLANE:31:plane-0] commit wait timed out
> tilcdc 4830e000.lcdc: already pending page flip!
> 
> This is because there is operation sequence as below:
> 
> drm_atomic_connector_commit_dpms(mode is DRM_MODE_DPMS_OFF):
>     ...
>     drm_atomic_helper_setup_commit <- 
> init_completion(commit_A->flip_done)
>     drm_atomic_helper_commit_tail
>         tilcdc_crtc_atomic_disable
>         tilcdc_plane_atomic_update <- drm_crtc_send_vblank_event in
> tilcdc_crtc_irq
>                                       is skipped since 
> tilcdc_crtc->enabled is 0
>         tilcdc_crtc_atomic_flush   <- drm_crtc_send_vblank_event is
> skipped since
>                                       crtc->state->event is set to be 
> NULL in
>                                       tilcdc_plane_atomic_update
> drm_mode_setcrtc:
>     ...
>     drm_atomic_helper_setup_commit <- 
> init_completion(commit_B->flip_done)
>     drm_atomic_helper_wait_for_dependencies
>         drm_crtc_commit_wait   <- wait for commit_A->flip_done 
> completing
> 
> Just as shown above, the steps which could complete commit_A->flip_done
> are all skipped and commit_A->flip_done will never be completed. This 
> will
> result a time-out ERROR when drm_crtc_commit_wait check the 
> commit_A->flip_done.
> So add drm_crtc_send_vblank_event in tilcdc_crtc_atomic_disable to
> complete commit_A->flip_done.
> 
> Fixes: cb345decb4d2 ("drm/tilcdc: Use standard 
> drm_atomic_helper_commit")
> Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>

Reviewed-by: Jyri Sarha <jyri.sarha@iki.fi>
Tested-by: Jyri Sarha <jyri.sarha@iki.fi>

Thanks a lot! I think I have bumbed into this once or twice, but latelu 
I have had time to look into this. I'll merge this to drm-misc-next 
soon.

Best regards,
Jyri

> ---
>  drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> index 30213708fc99..d99afd19ca08 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> @@ -515,6 +515,15 @@ static void tilcdc_crtc_off(struct drm_crtc
> *crtc, bool shutdown)
> 
>  	drm_crtc_vblank_off(crtc);
> 
> +	spin_lock_irq(&crtc->dev->event_lock);
> +
> +	if (crtc->state->event) {
> +		drm_crtc_send_vblank_event(crtc, crtc->state->event);
> +		crtc->state->event = NULL;
> +	}
> +
> +	spin_unlock_irq(&crtc->dev->event_lock);
> +
>  	tilcdc_crtc_disable_irqs(dev);
> 
>  	pm_runtime_put_sync(dev->dev);

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [RESEND][PATCH] drm/tilcdc: send vblank event when disabling crtc
@ 2021-02-09 21:38   ` Jyri Sarha
  0 siblings, 0 replies; 4+ messages in thread
From: Jyri Sarha @ 2021-02-09 21:38 UTC (permalink / raw)
  To: quanyang.wang; +Cc: David Airlie, Tomi Valkeinen, dri-devel, linux-kernel

On 2021-02-09 10:24, quanyang.wang@windriver.com wrote:
> From: Quanyang Wang <quanyang.wang@windriver.com>
> 
> When run xrandr to change resolution on Beaglebone Black board, it will
> print the error information:
> 
> root@beaglebone:~# xrandr -display :0 --output HDMI-1 --mode 720x400
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:32:tilcdc
> crtc] commit wait timed out
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR*
> [CONNECTOR:34:HDMI-A-1] commit wait timed out
> [drm:drm_crtc_commit_wait] *ERROR* flip_done timed out
> [drm:drm_atomic_helper_wait_for_dependencies] *ERROR*
> [PLANE:31:plane-0] commit wait timed out
> tilcdc 4830e000.lcdc: already pending page flip!
> 
> This is because there is operation sequence as below:
> 
> drm_atomic_connector_commit_dpms(mode is DRM_MODE_DPMS_OFF):
>     ...
>     drm_atomic_helper_setup_commit <- 
> init_completion(commit_A->flip_done)
>     drm_atomic_helper_commit_tail
>         tilcdc_crtc_atomic_disable
>         tilcdc_plane_atomic_update <- drm_crtc_send_vblank_event in
> tilcdc_crtc_irq
>                                       is skipped since 
> tilcdc_crtc->enabled is 0
>         tilcdc_crtc_atomic_flush   <- drm_crtc_send_vblank_event is
> skipped since
>                                       crtc->state->event is set to be 
> NULL in
>                                       tilcdc_plane_atomic_update
> drm_mode_setcrtc:
>     ...
>     drm_atomic_helper_setup_commit <- 
> init_completion(commit_B->flip_done)
>     drm_atomic_helper_wait_for_dependencies
>         drm_crtc_commit_wait   <- wait for commit_A->flip_done 
> completing
> 
> Just as shown above, the steps which could complete commit_A->flip_done
> are all skipped and commit_A->flip_done will never be completed. This 
> will
> result a time-out ERROR when drm_crtc_commit_wait check the 
> commit_A->flip_done.
> So add drm_crtc_send_vblank_event in tilcdc_crtc_atomic_disable to
> complete commit_A->flip_done.
> 
> Fixes: cb345decb4d2 ("drm/tilcdc: Use standard 
> drm_atomic_helper_commit")
> Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>

Reviewed-by: Jyri Sarha <jyri.sarha@iki.fi>
Tested-by: Jyri Sarha <jyri.sarha@iki.fi>

Thanks a lot! I think I have bumbed into this once or twice, but latelu 
I have had time to look into this. I'll merge this to drm-misc-next 
soon.

Best regards,
Jyri

> ---
>  drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> index 30213708fc99..d99afd19ca08 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> @@ -515,6 +515,15 @@ static void tilcdc_crtc_off(struct drm_crtc
> *crtc, bool shutdown)
> 
>  	drm_crtc_vblank_off(crtc);
> 
> +	spin_lock_irq(&crtc->dev->event_lock);
> +
> +	if (crtc->state->event) {
> +		drm_crtc_send_vblank_event(crtc, crtc->state->event);
> +		crtc->state->event = NULL;
> +	}
> +
> +	spin_unlock_irq(&crtc->dev->event_lock);
> +
>  	tilcdc_crtc_disable_irqs(dev);
> 
>  	pm_runtime_put_sync(dev->dev);
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-02-10  1:18 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-09  8:24 [RESEND][PATCH] drm/tilcdc: send vblank event when disabling crtc quanyang.wang
2021-02-09  8:24 ` quanyang.wang
2021-02-09 21:38 ` Jyri Sarha
2021-02-09 21:38   ` Jyri Sarha

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