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Subject[PATCH 4.14 02/75] drm/fsl-dcu: enable IRQ before drm_atomic_helper_resume()
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Agner <stefan@agner.ch>

commit 9fd99f4f3f5e13ce959900ae57d64b1bdb51d823 upstream.

The resume helpers wait for a vblank to occurre hence IRQ need
to be enabled. This avoids a warning as follows during resume:
WARNING: CPU: 0 PID: 314 at drivers/gpu/drm/drm_atomic_helper.c:1249 drm_atomic_helper_wait_for_vblanks.part.1+0x284/0x288
[CRTC:28:crtc-0] vblank wait timed out

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -232,6 +232,7 @@ static int fsl_dcu_drm_pm_resume(struct
if (fsl_dev->tcon)
fsl_tcon_bypass_enable(fsl_dev->tcon);
fsl_dcu_drm_init_planes(fsl_dev->drm);
+ enable_irq(fsl_dev->irq);
drm_atomic_helper_resume(fsl_dev->drm, fsl_dev->state);

console_lock();
@@ -239,7 +240,6 @@ static int fsl_dcu_drm_pm_resume(struct
console_unlock();

drm_kms_helper_poll_enable(fsl_dev->drm);
- enable_irq(fsl_dev->irq);

return 0;
}

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