mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-13 14:14:37 +00:00
Code Issues Releases Wiki Activity

drm/rockchip: Clear interrupt status bits before enabling

Browse source 
The enable register only masks the raw status bits to signal CPU
interrupt only for enabled interrupts. The status bits are activated
regardless of the enable register. This means that we might have an old
interrupt event queued, which we are not interested in. To avoid getting
a spurious interrupt signalled, we have to clear the old bit before we
update the enable register.

Signed-off-by: Tomasz Figa <tfiga@chromium.org>
This commit is contained in:
Tomasz Figa 2016-09-14 21:54:54 +09:00 committed by Sean Paul
parent be91a983ea
commit fa374107c1
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
View file

@ -414,6 +414,7 @@ static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
spin_lock_irqsave(&vop->irq_lock, flags);
VOP_INTR_SET_TYPE(vop, clear, DSP_HOLD_VALID_INTR, 1);
VOP_INTR_SET_TYPE(vop, enable, DSP_HOLD_VALID_INTR, 1);
spin_unlock_irqrestore(&vop->irq_lock, flags);
@ -479,6 +480,7 @@ static void vop_line_flag_irq_enable(struct vop *vop, int line_num)
spin_lock_irqsave(&vop->irq_lock, flags);
VOP_CTRL_SET(vop, line_flag_num[0], line_num);
VOP_INTR_SET_TYPE(vop, clear, LINE_FLAG_INTR, 1);
VOP_INTR_SET_TYPE(vop, enable, LINE_FLAG_INTR, 1);
spin_unlock_irqrestore(&vop->irq_lock, flags);
@ -917,6 +919,7 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
spin_lock_irqsave(&vop->irq_lock, flags);
VOP_INTR_SET_TYPE(vop, clear, FS_INTR, 1);
VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 1);
spin_unlock_irqrestore(&vop->irq_lock, flags);