@@ -289,6 +289,7 @@ static int vc4_drm_bind(struct device *dev)
drm_for_each_crtc(crtc, drm)
vc4_crtc_disable_at_boot(crtc);
+ vc4_hvs_clear_dlist(drm);
ret = drm_dev_register(drm, 0);
if (ret < 0)
@@ -911,6 +911,7 @@ void vc4_irq_reset(struct drm_device *dev);
/* vc4_hvs.c */
extern struct platform_driver vc4_hvs_driver;
+void vc4_hvs_clear_dlist(struct drm_device *dev);
void vc4_hvs_stop_channel(struct drm_device *dev, unsigned int output);
int vc4_hvs_get_fifo_from_output(struct drm_device *dev, unsigned int output);
int vc4_hvs_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state);
@@ -326,6 +326,18 @@ void vc4_hvs_stop_channel(struct drm_device *dev, unsigned int chan)
SCALER_DISPSTATX_EMPTY);
}
+void vc4_hvs_clear_dlist(struct drm_device *dev)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ void __iomem *dlist_start = vc4->hvs->dlist;
+ unsigned int i;
+
+ for (i = 0; i < 0x4000; i += 4)
+ writel(SCALER_CTL0_END, dlist_start + i);
+
+ vc4_hvs_dump_state(dev);
+}
+
int vc4_hvs_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
The kernel boots with the display running and we make sure to shut down the scan out engines properly but we keep the display list for now. Let's make sure we start from a clean state. Signed-off-by: Maxime Ripard <maxime@cerno.tech> --- drivers/gpu/drm/vc4/vc4_drv.c | 1 + drivers/gpu/drm/vc4/vc4_drv.h | 1 + drivers/gpu/drm/vc4/vc4_hvs.c | 12 ++++++++++++ 3 files changed, 14 insertions(+)