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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-08 15:19:11 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-10 18:11:18 +0300
commit4f9d39a78e1d3100b990ec30da5a14a059e0a304 (patch)
treeb4a6b4db5035812f64fe7978879dfe0e9b87ec48 /drivers/gpu/drm
parent05c960e79dbcd751bbcae148a01121dddf997465 (diff)
downloadlinux-4f9d39a78e1d3100b990ec30da5a14a059e0a304.tar.xz
drm/rockchip: Fix crtc_state->event signalling
It's not permissible to look at plane->state from interrupt context, since doing that would need the irq handler to acquire the plane->mutex lock. The other problem is that if we pipeline updates using the new nonblocking atomic helpers new state gets commit before the irq handler fires, resulting in a lost event. Fix both issues by caching the necessary values in vop_win, protected by dev->event_lock. Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Mark yao <mark.yao@rock-chips.com> Tested-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465388359-8070-19-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/rockchip/rockchip_drm_vop.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 957a6b4917c8..94eaeec29b6b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -98,7 +98,9 @@ struct vop_win {
const struct vop_win_data *data;
struct vop *vop;
- struct vop_plane_state state;
+ /* protected by dev->event_lock */
+ bool enable;
+ dma_addr_t yrgb_mst;
};
struct vop {
@@ -112,6 +114,8 @@ struct vop {
bool vsync_work_pending;
struct completion dsp_hold_completion;
struct completion wait_update_complete;
+
+ /* protected by dev->event_lock */
struct drm_pending_vblank_event *event;
const struct vop_data *data;
@@ -652,6 +656,11 @@ static void vop_plane_atomic_disable(struct drm_plane *plane,
if (!old_state->crtc)
return;
+ spin_lock_irq(&plane->dev->event_lock);
+ vop_win->enable = false;
+ vop_win->yrgb_mst = 0;
+ spin_unlock_irq(&plane->dev->event_lock);
+
spin_lock(&vop->reg_lock);
VOP_WIN_SET(vop, win, enable, 0);
@@ -686,7 +695,7 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
/*
* can't update plane when vop is disabled.
*/
- if (!crtc)
+ if (WARN_ON(!crtc))
return;
if (WARN_ON(!vop->is_enabled))
@@ -715,6 +724,11 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
offset += (src->y1 >> 16) * fb->pitches[0];
vop_plane_state->yrgb_mst = rk_obj->dma_addr + offset + fb->offsets[0];
+ spin_lock_irq(&plane->dev->event_lock);
+ vop_win->enable = true;
+ vop_win->yrgb_mst = vop_plane_state->yrgb_mst;
+ spin_unlock_irq(&plane->dev->event_lock);
+
spin_lock(&vop->reg_lock);
VOP_WIN_SET(vop, win, format, vop_plane_state->format);
@@ -1074,16 +1088,14 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
static bool vop_win_pending_is_complete(struct vop_win *vop_win)
{
- struct drm_plane *plane = &vop_win->base;
- struct vop_plane_state *state = to_vop_plane_state(plane->state);
dma_addr_t yrgb_mst;
- if (!state->enable)
+ if (!vop_win->enable)
return VOP_WIN_GET(vop_win->vop, vop_win->data, enable) == 0;
yrgb_mst = VOP_WIN_GET_YRGBADDR(vop_win->vop, vop_win->data);
- return yrgb_mst == state->yrgb_mst;
+ return yrgb_mst == vop_win->yrgb_mst;
}
static void vop_handle_vblank(struct vop *vop)