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From:   Enric Balletbo i Serra <enric.balletbo@collabora.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-mediatek@lists.infradead.org, eizan@chromium.org,
        kernel@collabora.com, drinkcat@chromium.org,
        jitao.shi@mediatek.com, chunkuang.hu@kernel.org,
        hsinyi@chromium.org, matthias.bgg@gmail.com,
        Rob Herring <robh@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Rob Herring <robh+dt@kernel.org>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 4/7] arm64: dts: mt8173: Add the mmsys reset bit to reset the dsi0
Date:   Thu, 30 Sep 2021 10:31:47 +0200
Message-Id: <20210930103105.v4.4.I7bd7d9a8da5e2894711b700a1127e6902a2b2f1d@changeid>
In-Reply-To: <20210930083150.3317003-1-enric.balletbo@collabora.com>
References: <20210930083150.3317003-1-enric.balletbo@collabora.com>
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Reset the DSI hardware is needed to prevent different settings between
the bootloader and the kernel.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
---

(no changes since v1)

 arch/arm64/boot/dts/mediatek/mt8173.dtsi  | 2 ++
 include/dt-bindings/reset/mt8173-resets.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index 17d70e2f5394..97ea3f9960b1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -1036,6 +1036,7 @@ mmsys: syscon@14000000 {
 			assigned-clocks = <&topckgen CLK_TOP_MM_SEL>;
 			assigned-clock-rates = <400000000>;
 			#clock-cells = <1>;
+			#reset-cells = <1>;
 			mboxes = <&gce 0 CMDQ_THR_PRIO_HIGHEST>,
 				 <&gce 1 CMDQ_THR_PRIO_HIGHEST>;
 			mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0 0x1000>;
@@ -1262,6 +1263,7 @@ dsi0: dsi@1401b000 {
 				 <&mmsys CLK_MM_DSI0_DIGITAL>,
 				 <&mipi_tx0>;
 			clock-names = "engine", "digital", "hs";
+			resets = <&mmsys MT8173_MMSYS_SW0_RST_B_DISP_DSI0>;
 			phys = <&mipi_tx0>;
 			phy-names = "dphy";
 			status = "disabled";
diff --git a/include/dt-bindings/reset/mt8173-resets.h b/include/dt-bindings/reset/mt8173-resets.h
index ba8636eda5ae..6a60c7cecc4c 100644
--- a/include/dt-bindings/reset/mt8173-resets.h
+++ b/include/dt-bindings/reset/mt8173-resets.h
@@ -27,6 +27,8 @@
 #define MT8173_INFRA_GCE_FAXI_RST       40
 #define MT8173_INFRA_MMIOMMURST         47
 
+/* MMSYS resets */
+#define MT8173_MMSYS_SW0_RST_B_DISP_DSI0	25
 
 /*  PERICFG resets */
 #define MT8173_PERI_UART0_SW_RST        0
-- 
2.30.2