Merge tag 'mediatek-drm-fixes-5.15' of...

Merge tag 'mediatek-drm-fixes-5.15' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-fixes

Mediatek DRM Fixes for Linux 5.15

1. Revert series "CMDQ refinement of Mediatek DRM driver"
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211013235044.5488-1-chunkuang.hu@kernel.org

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

@@ -4,8 +4,6 @@
  */
 
 #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>
@@ -52,11 +50,8 @@ struct mtk_drm_crtc {
 	bool				pending_async_planes;
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-	struct mbox_client		cmdq_cl;
-	struct mbox_chan		*cmdq_chan;
-	struct cmdq_pkt			cmdq_handle;
+	struct cmdq_client		*cmdq_client;
 	u32				cmdq_event;
-	u32				cmdq_vblank_cnt;
 #endif
 
 	struct device			*mmsys_dev;
@@ -227,79 +222,9 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
 }
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-static int mtk_drm_cmdq_pkt_create(struct mbox_chan *chan, struct cmdq_pkt *pkt,
-				    size_t size)
+static void ddp_cmdq_cb(struct cmdq_cb_data data)
 {
-	struct device *dev;
-	dma_addr_t dma_addr;
-
-	pkt->va_base = kzalloc(size, GFP_KERNEL);
-	if (!pkt->va_base) {
-		kfree(pkt);
-		return -ENOMEM;
-	}
-	pkt->buf_size = size;
-
-	dev = chan->mbox->dev;
-	dma_addr = dma_map_single(dev, pkt->va_base, pkt->buf_size,
-				  DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, dma_addr)) {
-		dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
-		kfree(pkt->va_base);
-		kfree(pkt);
-		return -ENOMEM;
-	}
-
-	pkt->pa_base = dma_addr;
-
-	return 0;
-}
-
-static void mtk_drm_cmdq_pkt_destroy(struct mbox_chan *chan, struct cmdq_pkt *pkt)
-{
-	dma_unmap_single(chan->mbox->dev, pkt->pa_base, pkt->buf_size,
-			 DMA_TO_DEVICE);
-	kfree(pkt->va_base);
-	kfree(pkt);
-}
-
-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;
-	struct mtk_crtc_state *state;
-	unsigned int i;
-
-	state = to_mtk_crtc_state(mtk_crtc->base.state);
-
-	state->pending_config = false;
-
-	if (mtk_crtc->pending_planes) {
-		for (i = 0; i < mtk_crtc->layer_nr; i++) {
-			struct drm_plane *plane = &mtk_crtc->planes[i];
-			struct mtk_plane_state *plane_state;
-
-			plane_state = to_mtk_plane_state(plane->state);
-
-			plane_state->pending.config = false;
-		}
-		mtk_crtc->pending_planes = false;
-	}
-
-	if (mtk_crtc->pending_async_planes) {
-		for (i = 0; i < mtk_crtc->layer_nr; i++) {
-			struct drm_plane *plane = &mtk_crtc->planes[i];
-			struct mtk_plane_state *plane_state;
-
-			plane_state = to_mtk_plane_state(plane->state);
-
-			plane_state->pending.async_config = false;
-		}
-		mtk_crtc->pending_async_planes = false;
-	}
-
-	mtk_crtc->cmdq_vblank_cnt = 0;
-	mtk_drm_cmdq_pkt_destroy(mtk_crtc->cmdq_chan, data->pkt);
+	cmdq_pkt_destroy(data.data);
 }
 #endif
 
@@ -453,8 +378,7 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				    state->pending_vrefresh, 0,
 				    cmdq_handle);
 
-		if (!cmdq_handle)
-			state->pending_config = false;
+		state->pending_config = false;
 	}
 
 	if (mtk_crtc->pending_planes) {
@@ -474,12 +398,9 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				mtk_ddp_comp_layer_config(comp, local_layer,
 							  plane_state,
 							  cmdq_handle);
-			if (!cmdq_handle)
-				plane_state->pending.config = false;
+			plane_state->pending.config = false;
 		}
-
-		if (!cmdq_handle)
-			mtk_crtc->pending_planes = false;
+		mtk_crtc->pending_planes = false;
 	}
 
 	if (mtk_crtc->pending_async_planes) {
@@ -499,12 +420,9 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				mtk_ddp_comp_layer_config(comp, local_layer,
 							  plane_state,
 							  cmdq_handle);
-			if (!cmdq_handle)
-				plane_state->pending.async_config = false;
+			plane_state->pending.async_config = false;
 		}
-
-		if (!cmdq_handle)
-			mtk_crtc->pending_async_planes = false;
+		mtk_crtc->pending_async_planes = false;
 	}
 }
 
@@ -512,7 +430,7 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 				       bool needs_vblank)
 {
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-	struct cmdq_pkt *cmdq_handle = &mtk_crtc->cmdq_handle;
+	struct cmdq_pkt *cmdq_handle;
 #endif
 	struct drm_crtc *crtc = &mtk_crtc->base;
 	struct mtk_drm_private *priv = crtc->dev->dev_private;
@@ -550,24 +468,14 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 		mtk_mutex_release(mtk_crtc->mutex);
 	}
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-	if (mtk_crtc->cmdq_chan) {
-		mbox_flush(mtk_crtc->cmdq_chan, 2000);
-		cmdq_handle->cmd_buf_size = 0;
+	if (mtk_crtc->cmdq_client) {
+		mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
+		cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
 		cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
 		cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 		mtk_crtc_ddp_config(crtc, cmdq_handle);
 		cmdq_pkt_finalize(cmdq_handle);
-		dma_sync_single_for_device(mtk_crtc->cmdq_chan->mbox->dev,
-					    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);
+		cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
 	}
 #endif
 	mtk_crtc->config_updating = false;
@@ -581,15 +489,12 @@ static void mtk_crtc_ddp_irq(void *data)
 	struct mtk_drm_private *priv = crtc->dev->dev_private;
 
 #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));
+	if (!priv->data->shadow_register && !mtk_crtc->cmdq_client)
 #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);
 }
 
@@ -924,20 +829,16 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	mutex_init(&mtk_crtc->hw_lock);
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
-	mtk_crtc->cmdq_cl.dev = mtk_crtc->mmsys_dev;
-	mtk_crtc->cmdq_cl.tx_block = false;
-	mtk_crtc->cmdq_cl.knows_txdone = true;
-	mtk_crtc->cmdq_cl.rx_callback = ddp_cmdq_cb;
-	mtk_crtc->cmdq_chan =
-			mbox_request_channel(&mtk_crtc->cmdq_cl,
-					      drm_crtc_index(&mtk_crtc->base));
-	if (IS_ERR(mtk_crtc->cmdq_chan)) {
+	mtk_crtc->cmdq_client =
+			cmdq_mbox_create(mtk_crtc->mmsys_dev,
+					 drm_crtc_index(&mtk_crtc->base));
+	if (IS_ERR(mtk_crtc->cmdq_client)) {
 		dev_dbg(dev, "mtk_crtc %d failed to create mailbox client, writing register by CPU now\n",
 			drm_crtc_index(&mtk_crtc->base));
-		mtk_crtc->cmdq_chan = NULL;
+		mtk_crtc->cmdq_client = NULL;
 	}
 
-	if (mtk_crtc->cmdq_chan) {
+	if (mtk_crtc->cmdq_client) {
 		ret = of_property_read_u32_index(priv->mutex_node,
 						 "mediatek,gce-events",
 						 drm_crtc_index(&mtk_crtc->base),
@@ -945,18 +846,8 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 		if (ret) {
 			dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
 				drm_crtc_index(&mtk_crtc->base));
-			mbox_free_channel(mtk_crtc->cmdq_chan);
-			mtk_crtc->cmdq_chan = NULL;
-		} else {
-			ret = mtk_drm_cmdq_pkt_create(mtk_crtc->cmdq_chan,
-						       &mtk_crtc->cmdq_handle,
-						       PAGE_SIZE);
-			if (ret) {
-				dev_dbg(dev, "mtk_crtc %d failed to create cmdq packet\n",
-					drm_crtc_index(&mtk_crtc->base));
-				mbox_free_channel(mtk_crtc->cmdq_chan);
-				mtk_crtc->cmdq_chan = NULL;
-			}
+			cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+			mtk_crtc->cmdq_client = NULL;
 		}
 	}
 #endif