drm/fsl-dcu: disable vblank events on CRTC disable

Disable vblank events when CRTC gets disabled. This avoids an
external abort when entering suspend while disable_timer is still
active: On resume the timer might fire immediately and cause a
register access in fsl_dcu_drm_disable_vblank before clocks get
enabled by the resume function.

Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Stefan Agner 2016-04-18 18:22:47 -07:00
parent a8db432471
commit f5bce4309d

View File

@ -43,6 +43,8 @@ static void fsl_dcu_drm_disable_crtc(struct drm_crtc *crtc)
struct drm_device *dev = crtc->dev;
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
drm_crtc_vblank_off(crtc);
regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE,
DCU_MODE_DCU_MODE_MASK,
DCU_MODE_DCU_MODE(DCU_MODE_OFF));
@ -60,6 +62,8 @@ static void fsl_dcu_drm_crtc_enable(struct drm_crtc *crtc)
DCU_MODE_DCU_MODE(DCU_MODE_NORMAL));
regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
DCU_UPDATE_MODE_READREG);
drm_crtc_vblank_on(crtc);
}
static void fsl_dcu_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)