This patch fixes the following soft lockup: BUG: soft lockup - CPU#0 stuck for 23s! [weston:307]

On weston idle-timeout the IP is powered down and reset asserted. On weston resume we get a massive vblank IRQ storm due to the LDI registers having lost some state.

This state loss is caused by ade_crtc_atomic_begin() not calling ade_ldi_set_mode(). With this patch applied resuming from Weston idle-timeout works well.

Signed-off-by: Peter Griffin peter.griffin@linaro.org --- drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c index c96c228..72c6357 100644 --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c @@ -519,9 +519,12 @@ static void ade_crtc_atomic_begin(struct drm_crtc *crtc, { struct ade_crtc *acrtc = to_ade_crtc(crtc); struct ade_hw_ctx *ctx = acrtc->ctx; + struct drm_display_mode *mode = &crtc->state->mode; + struct drm_display_mode *adj_mode = &crtc->state->adjusted_mode;

if (!ctx->power_on) (void)ade_power_up(ctx); + ade_ldi_set_mode(acrtc, mode, adj_mode); }

static void ade_crtc_atomic_flush(struct drm_crtc *crtc,