On 2014년 10월 02일 17:58, Joonyoung Shim wrote:
> Hi Andrzej,
>
> On 10/01/2014 05:14 PM, Andrzej Hajda wrote:
>> The patch disables vblanks during dpms off only if pagefilp has
>> not been finished. It also replaces drm_vblank_off with drm_crtc_vblank_put.
>> It fixes issue with page_flip ioctl not being able to acquire vblank counter.
>
> This problem isn't related with pageflip, it just causes from
> 7ffd7a68511c710b84db3548a1997fd2625f580a commit (drm: Always reject
> drm_vblank_get() after drm_vblank_off()).
>
> We need to use drm_vblank_on() as a counterpart to drm_vblank_off()
> after the commit .
>
> How about below patch?
Thanks you Joonyoung and Andrzej,
drm_vblank_on/off() are legacy api so it would be better to use
drm_vblank_crtc_on/off functions instead.
And drm_vblank_crtc_off() makes sure that the latest vblank frame count
is stored and restored by drm_vblank_crtc_on() again. So my opinion is,
static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
[snip]
if (mode > DRM_MODE_DPMS_ON) {
/* wait for the completion of page flip. */
if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
!atomic_read(&exynos_crtc->pending_flip),
HZ/20))
atomic_set(&exynos_crtc->pending_flip, 0);
drm_crtc_vblank_off(crtc); //<- store the latest vblank frame count.
} else {
drm_crtc_vblank_on(crtc); //<- restore the vblank frame count.
}
[snip]
}
Tested and worked well with above patch. How about it?
Thanks,
Inki Dae
>
>>From 6de01473746af225c688ee430123001d57d9af2a Mon Sep 17 00:00:00 2001
> From: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Date: Thu, 2 Oct 2014 17:48:27 +0900
> Subject: [PATCH] drm/exynos: use drm_vblank_on()
>
> We need to use drm_vblank_on() as a counterpart to drm_vblank_off()
> after the commit 7ffd7a68511c ("drm: Always reject drm_vblank_get()
> after drm_vblank_off()"). If not, drm_vblank_get() will be failed
> always after drm_vblank_off().
>
> Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_crtc.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index 8e38e9f..dfa209a 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -71,7 +71,6 @@ static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
> !atomic_read(&exynos_crtc->pending_flip),
> HZ/20))
> atomic_set(&exynos_crtc->pending_flip, 0);
> - drm_vblank_off(crtc->dev, exynos_crtc->pipe);
> }
>
> if (manager->ops->dpms)
> @@ -90,6 +89,7 @@ static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
> struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> struct exynos_drm_manager *manager = exynos_crtc->manager;
>
> + drm_vblank_on(crtc->dev, exynos_crtc->pipe);
> exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
>
> exynos_plane_commit(crtc->primary);
> @@ -177,10 +177,12 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
>
> static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
> {
> + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> struct drm_plane *plane;
> int ret;
>
> exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
> + drm_vblank_off(crtc->dev, exynos_crtc->pipe);
>
> drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
> if (plane->crtc != crtc)
>
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