From a8593136607968259125da6fdd0c14d7e709f252 Mon Sep 17 00:00:00 2001
From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Date: Thu, 1 Jul 2021 21:20:53 +0800
Subject: drm/mediatek: Use mailbox rx_callback instead of cmdq_task_cb
Git-commit: c1ec54b7b5af25c779192253f5a9f05e95cb43d7
Patch-mainline: v5.15-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

rx_callback is a standard mailbox callback mechanism and could cover the
function of proprietary cmdq_task_cb, so use the standard one instead of
the proprietary one.

Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index a4e80e499674..3f9802d21bf0 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -4,6 +4,8 @@
  */
 
 #include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/mailbox_controller.h>
 #include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>
@@ -222,9 +224,11 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
 }
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-static void ddp_cmdq_cb(struct cmdq_cb_data data)
+static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
 {
-	cmdq_pkt_destroy(data.data);
+	struct cmdq_cb_data *data = mssg;
+
+	cmdq_pkt_destroy(data->pkt);
 }
 #endif
 
@@ -475,7 +479,12 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 		cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 		mtk_crtc_ddp_config(crtc, cmdq_handle);
 		cmdq_pkt_finalize(cmdq_handle);
-		cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
+		dma_sync_single_for_device(mtk_crtc->cmdq_client->chan->mbox->dev,
+					    cmdq_handle->pa_base,
+					    cmdq_handle->cmd_buf_size,
+					    DMA_TO_DEVICE);
+		mbox_send_message(mtk_crtc->cmdq_client->chan, cmdq_handle);
+		mbox_client_txdone(mtk_crtc->cmdq_client->chan, 0);
 	}
 #endif
 	mtk_crtc->config_updating = false;
@@ -839,6 +848,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	}
 
 	if (mtk_crtc->cmdq_client) {
+		mtk_crtc->cmdq_client->client.rx_callback = ddp_cmdq_cb;
 		ret = of_property_read_u32_index(priv->mutex_node,
 						 "mediatek,gce-events",
 						 drm_crtc_index(&mtk_crtc->base),
-- 
2.38.1