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drm/mediatek: Fix underrun in VDO1 when switches off the layer

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Do not reset Merge while using CMDQ because reset API doesn't
wait for frame done event as CMDQ does and could lead to
underrun when the layer is switching off.

Fixes: aaf94f7c3a ("drm/mediatek: Add display merge async reset control")

Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20231214055847.4936-23-shawn.sung@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
Hsiao Chien Sung
2023-12-14 13:58:46 +08:00
committed by Chun-Kuang Hu
parent 8ac6935e56
commit 73b5ab27ab
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/mediatek/mtk_disp_merge.c
+1 -1
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@@ -103,7 +103,7 @@ void mtk_merge_stop_cmdq(struct device *dev, struct cmdq_pkt *cmdq_pkt)
mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
DISP_REG_MERGE_CTRL);
if (priv->async_clk)
if (!cmdq_pkt && priv->async_clk)
reset_control_reset(priv->reset_ctl);
}