diff options
| author | Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2021-07-04 15:59:24 +0800 |
|---|---|---|
| committer | Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2021-08-17 07:08:11 +0800 |
| commit | 8cdcb365342402fdeb664479b0a04e9debef8efb (patch) | |
| tree | 84be906d610ff39c645b7e1fe8398f7268eb04c8 /drivers/gpu/drm/mediatek | |
| parent | f4be17cd5b14dd73545b0e014a63ebe9ab5ef837 (diff) | |
drm/mediatek: Detect CMDQ execution timeout
CMDQ is used to update display register in vblank period, so
it should be execute in next vblank. If it fail to execute
in next 2 vblank, tiemout happen.
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/mediatek')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index b21340814c54..7aea658551bd 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -55,6 +55,7 @@ struct mtk_drm_crtc { struct mbox_client cmdq_cl; struct mbox_chan *cmdq_chan; u32 cmdq_event; + u32 cmdq_vblank_cnt; #endif struct device *mmsys_dev; @@ -269,6 +270,7 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg) struct mtk_drm_crtc *mtk_crtc = container_of(cl, struct mtk_drm_crtc, cmdq_cl); struct cmdq_cb_data *data = mssg; + mtk_crtc->cmdq_vblank_cnt = 0; mtk_drm_cmdq_pkt_destroy(mtk_crtc->cmdq_chan, data->pkt); } #endif @@ -524,6 +526,11 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc, cmdq_handle->pa_base, cmdq_handle->cmd_buf_size, DMA_TO_DEVICE); + /* + * CMDQ command should execute in next vblank, + * If it fail to execute in next 2 vblank, timeout happen. + */ + mtk_crtc->cmdq_vblank_cnt = 2; mbox_send_message(mtk_crtc->cmdq_chan, cmdq_handle); mbox_client_txdone(mtk_crtc->cmdq_chan, 0); } @@ -540,11 +547,14 @@ static void mtk_crtc_ddp_irq(void *data) #if IS_REACHABLE(CONFIG_MTK_CMDQ) if (!priv->data->shadow_register && !mtk_crtc->cmdq_chan) + mtk_crtc_ddp_config(crtc, NULL); + else if (mtk_crtc->cmdq_vblank_cnt > 0 && --mtk_crtc->cmdq_vblank_cnt == 0) + DRM_ERROR("mtk_crtc %d CMDQ execute command timeout!\n", + drm_crtc_index(&mtk_crtc->base)); #else if (!priv->data->shadow_register) -#endif mtk_crtc_ddp_config(crtc, NULL); - +#endif mtk_drm_finish_page_flip(mtk_crtc); } |