Enable vblank handling when the CRTC is turned on and disable it when it
is turned off. This requires moving vblank init after the KMS pipeline
initialisation, otherwise drm_vblank_init() gets called with 0 CRTCs.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Emil Velikov <emil.l.velikov@xxxxxxxxx>
Reviewed-by: Stefan Agner <stefan@xxxxxxxx>
---
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 15 +++++++++------
drivers/gpu/drm/mxsfb/mxsfb_kms.c | 6 +++++-
2 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index cac50fb4fc0f..85756d5907e3 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -161,12 +161,6 @@ static int mxsfb_load(struct drm_device *drm)
pm_runtime_enable(drm->dev);
- ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
- if (ret < 0) {
- dev_err(drm->dev, "Failed to initialise vblank\n");
- goto err_vblank;
- }
-
/* Modeset init */
drm_mode_config_init(drm);
@@ -176,6 +170,15 @@ static int mxsfb_load(struct drm_device *drm)
goto err_vblank;
}
+ ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to initialise vblank\n");
+ goto err_vblank;
+ }
+
+ /* Start with vertical blanking interrupt reporting disabled. */
+ drm_crtc_vblank_off(&mxsfb->crtc);
+
ret = mxsfb_attach_bridge(mxsfb);
if (ret) {
dev_err(drm->dev, "Cannot connect bridge: %d\n", ret);
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index 3e118848a083..70fd372952e1 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
@@ -322,8 +322,10 @@ static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
dma_addr_t paddr;
pm_runtime_get_sync(drm->dev);
-
mxsfb_enable_axi_clk(mxsfb);
+
+ drm_crtc_vblank_on(crtc);
+
mxsfb_crtc_mode_set_nofb(mxsfb);
/* Write cur_buf as well to avoid an initial corrupt frame */
@@ -353,6 +355,8 @@ static void mxsfb_crtc_atomic_disable(struct drm_crtc *crtc,
}
spin_unlock_irq(&drm->event_lock);
+ drm_crtc_vblank_off(crtc);
+
mxsfb_disable_axi_clk(mxsfb);
pm_runtime_put_sync(drm->dev);
}
--
Regards,
Laurent Pinchart
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