mtk_drm_crtc_atomic_disable will send an async cmd to cmdq driver, so it may not finish when cmdq_suspend is called sometimes.
Change async cmd to blocking cmd for mtk_drm_crtc_atomic_disable to make sure the lastest cmd is done before cmdq_suspend. Signed-off-by: jason-jh.lin <[email protected]> --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index 62529a954b62..6ca96802fd77 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -56,6 +56,8 @@ struct mtk_drm_crtc { struct cmdq_pkt cmdq_handle; u32 cmdq_event; u32 cmdq_vblank_cnt; + bool blocking_config; + struct completion cmplt; #endif struct device *mmsys_dev; @@ -314,6 +316,9 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) } mtk_crtc->cmdq_vblank_cnt = 0; + + if (mtk_crtc->blocking_config) + complete(&mtk_crtc->cmplt); } #endif @@ -584,8 +589,16 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc, */ mtk_crtc->cmdq_vblank_cnt = 3; + if (mtk_crtc->blocking_config) + init_completion(&mtk_crtc->cmplt); + mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle); mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0); + + if (mtk_crtc->blocking_config) { + wait_for_completion(&mtk_crtc->cmplt); + mtk_crtc->blocking_config = false; + } } #endif mtk_crtc->config_updating = false; @@ -698,7 +711,9 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc, plane_state->pending.config = true; } mtk_crtc->pending_planes = true; - +#if IS_REACHABLE(CONFIG_MTK_CMDQ) + mtk_crtc->blocking_config = true; +#endif mtk_drm_crtc_update_config(mtk_crtc, false); /* Wait for planes to be disabled */ drm_crtc_wait_one_vblank(crtc); -- 2.18.0
