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From: Nancy.Lin <[email protected]>
To: Rob Herring <[email protected]>,
	Matthias Brugger <[email protected]>,
	Chun-Kuang Hu <[email protected]>,
	"Philipp Zabel" <[email protected]>,
	<[email protected]>,
	"AngeloGioacchino Del Regno"
	<[email protected]>, <[email protected]>
Cc: [email protected],
	[email protected],
	Yongqiang Niu <[email protected]>,
	David Airlie <[email protected]>,
	"jason-jh . lin" <[email protected]>,
	[email protected], [email protected],
	Nick Desaulniers <[email protected]>,
	[email protected], [email protected],
	Nathan Chancellor <[email protected]>,
	"Nancy . Lin" <[email protected]>,
	[email protected],
	[email protected]
Subject: [PATCH v20 17/25] drm/mediatek: add display merge async reset control
Date: Wed, 4 May 2022 17:14:32 +0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Add merge async reset control in mtk_merge_stop. Async hw doesn't do self
reset on each sof signal(start of frame), so need to reset the async to
clear the hw status for the next merge start.

Signed-off-by: Nancy.Lin <[email protected]>
Reviewed-by: CK Hu <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
---
 drivers/gpu/drm/mediatek/mtk_disp_merge.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
index 2e13d2fb429e..6428b6203ffe 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
@@ -8,6 +8,7 @@
 #include <linux/of_device.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
+#include <linux/reset.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 
 #include "mtk_drm_ddp_comp.h"
@@ -67,6 +68,7 @@ struct mtk_disp_merge {
 	struct cmdq_client_reg		cmdq_reg;
 	bool				fifo_en;
 	bool				mute_support;
+	struct reset_control		*reset_ctl;
 };
 
 void mtk_merge_start(struct device *dev)
@@ -101,6 +103,9 @@ 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)
+		reset_control_reset(priv->reset_ctl);
 }
 
 static void mtk_merge_fifo_setting(struct mtk_disp_merge *priv,
@@ -264,6 +269,12 @@ static int mtk_disp_merge_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->async_clk);
 	}
 
+	if (priv->async_clk) {
+		priv->reset_ctl = devm_reset_control_get_optional_exclusive(dev, NULL);
+		if (IS_ERR(priv->reset_ctl))
+			return PTR_ERR(priv->reset_ctl);
+	}
+
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
 	if (ret)
-- 
2.18.0



  parent reply	other threads:[~2022-05-04  9:15 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-04  9:14 [PATCH v20 00/25] Add MediaTek SoC DRM (vdosys1) support for mt8195 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 01/25] dt-bindings: mediatek: add vdosys1 RDMA definition " Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 02/25] dt-bindings: reset: mt8195: add vdosys1 reset control bit Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 03/25] dt-bindings: mediatek: add ethdr definition for mt8195 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 04/25] soc: mediatek: add mtk-mmsys ethdr and mdp_rdma components Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 05/25] soc: mediatek: add mtk-mmsys support for mt8195 vdosys1 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 06/25] soc: mediatek: add mtk_mmsys_update_bits API Nancy.Lin
2022-05-04  9:16   ` AngeloGioacchino Del Regno
2022-05-04  9:14 ` [PATCH v20 07/25] soc: mediatek: add mtk-mmsys config API for mt8195 vdosys1 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 08/25] soc: mediatek: add cmdq support of " Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 09/25] soc: mediatek: mmsys: add mmsys for support 64 reset bits Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 10/25] soc: mediatek: mmsys: add reset control for MT8195 vdosys1 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 11/25] soc: mediatek: add mtk-mutex component - dp_intf1 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 12/25] soc: mediatek: add mtk-mutex support for mt8195 vdosys1 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 13/25] drm/mediatek: add display MDP RDMA support for MT8195 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 14/25] drm/mediatek: add display merge advance config API " Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 15/25] drm/mediatek: add display merge start/stop API for cmdq support Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 16/25] drm/mediatek: add display merge mute/unmute support for MT8195 Nancy.Lin
2022-05-04  9:14 ` Nancy.Lin [this message]
2022-05-04  9:14 ` [PATCH v20 18/25] drm/mediatek: add ETHDR " Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 19/25] drm/mediatek: add mediatek-drm plane color encoding info Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 20/25] drm/mediatek: add ovl_adaptor support for MT8195 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 21/25] drm/mediatek: add dma dev get function Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 22/25] drm/mediatek: modify mediatek-drm for mt8195 multi mmsys support Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 23/25] drm/mediatek: add drm ovl_adaptor sub driver for MT8195 Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 24/25] drm/mediatek: add mediatek-drm of vdosys1 support " Nancy.Lin
2022-05-04  9:14 ` [PATCH v20 25/25] arm64: dts: mt8195: add display node for vdosys1 Nancy.Lin

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