[PATCH 3/5] Revert "drm/mediatek: Detect CMDQ execution timeout"

[Chun-Kuang Hu]

This reverts commit 8cdcb365342402fdeb664479b0a04e9debef8efb.

Commit c1ec54b7b5af
("drm/mediatek: Use mailbox rx_callback instead of cmdq_task_cb")
would cause numerous mtk cmdq mailbox driver warning:

WARNING: CPU: 0 PID: 0 at drivers/mailbox/mtk-cmdq-mailbox.c:198
cmdq_task_exec_done+0xb8/0xe0

So revert that patch and all the patches depend on that patch.

Reported-by: Enric Balletbo Serra <eballe...@gmail.com>
Signed-off-by: Chun-Kuang Hu <chunkuang...@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c 
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 697c4dec1890..0cd5b9ed8956 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -55,7 +55,6 @@ 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;
@@ -270,7 +269,6 @@ 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
@@ -526,11 +524,6 @@ 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);
        }
@@ -547,14 +540,11 @@ 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)
-               mtk_crtc_ddp_config(crtc, NULL);
 #endif
+               mtk_crtc_ddp_config(crtc, NULL);
+
        mtk_drm_finish_page_flip(mtk_crtc);
 }
 
-- 
2.25.1