RE: [v1] drm/arm/mali-dp: Add a loop around the second set CVAL and try 5 times

-----Original Message----- From: Wen He Sent: 2019年5月8日 17:39 To: dri-devel@lists.freedesktop.org; liviu.dudau@arm.com; brian.starkey@arm.com Cc: Leo Li leoyang.li@nxp.com; Wen He wen.he_1@nxp.com Subject: [v1] drm/arm/mali-dp: Add a loop around the second set CVAL and try 5 times

This patch trying to fix monitor freeze issue caused by drm error 'flip_done timed out' on LS1028A platform. this set try is make a loop around the second setting CVAL and try like 5 times before giveing up.

Signed-off-by: Liviu liviu.Dudau@arm.com Signed-off-by: Wen He wen.he_1@nxp.com

---

drivers/gpu/drm/arm/malidp_drv.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index 21725c9b9f5e..18cb7f134f4e 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -192,6 +192,7 @@ static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state) { struct drm_device *drm = state->dev; struct malidp_drm *malidp = drm->dev_private;

• int loop = 5;

  malidp->event = malidp->crtc.state->event; malidp->crtc.state->event = NULL;

@@ -206,8 +207,18 @@ static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state) drm_crtc_vblank_get(&malidp->crtc);

/* only set config_valid if the CRTC is enabled */

• if (malidp_set_and_wait_config_valid(drm) < 0)
  

• if (malidp_set_and_wait_config_valid(drm) < 0) {
  

• 	/*
  

• 	 * make a loop around the second CVAL setting and
  

• 	 * try 5 times before giving up.
  

• 	 */
  

• 	while (loop--) {
  

• 		if (!malidp_set_and_wait_config_valid(drm))
  

• 			break;
  

• 	}
  DRM_DEBUG_DRIVER("timed out waiting for updated
  

configuration\n");

• }
  

• } else if (malidp->event) { /* CRTC inactive means vblank IRQ is disabled, send event directly */ spin_lock_irq(&drm->event_lock);

-- 2.17.1