linux-kernel - [PATCH] arm64: dts: meson-g12: add support for simplefb

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Message-Id: <20191003130841.8412-1-narmstrong@baylibre.com>
Date:   Thu,  3 Oct 2019 15:08:41 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     khilman@...libre.com
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Maxime Jourdan <mjourdan@...libre.com>
Subject: [PATCH] arm64: dts: meson-g12: add support for simplefb

SimpleFB allows transferring a framebuffer from the firmware/bootloader
to the kernel, while making sure the related clocks and power supplies
stay enabled.

Add nodes for CVBS and HDMI Simple Framebuffers, based on the GXBB/GXL/GXM
support at [1].

[1] 03b370357907 ("arm64: dts: meson-gx: add support for simplef")

Cc: Maxime Jourdan <mjourdan@...libre.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
This will be handled in the in-review U-Boot Video support for G12A at [1]
and the simplefb handling code at [2] and simplefb removal in DRM driver at [3].

[1] https://patchwork.ozlabs.org/cover/1155898/
[2] https://gitlab.denx.de/u-boot/u-boot/blob/v2019.07/drivers/video/meson/meson_vpu.c#L145
[3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/meson/meson_drv.c?h=v5.3#n158

 .../boot/dts/amlogic/meson-g12-common.dtsi    | 26 +++++++++++++++++++
 arch/arm64/boot/dts/amlogic/meson-g12.dtsi    |  8 ++++++
 arch/arm64/boot/dts/amlogic/meson-sm1.dtsi    |  8 ++++++
 3 files changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
index f76773cabdb1..21c155f4508c 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
@@ -16,6 +16,32 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	chosen {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		simplefb_cvbs: framebuffer-cvbs {
+			compatible = "amlogic,simple-framebuffer",
+				     "simple-framebuffer";
+			amlogic,pipeline = "vpu-cvbs";
+			clocks = <&clkc CLKID_HDMI>,
+				 <&clkc CLKID_HTX_PCLK>,
+				 <&clkc CLKID_VPU_INTR>;
+			status = "disabled";
+		};
+
+		simplefb_hdmi: framebuffer-hdmi {
+			compatible = "amlogic,simple-framebuffer",
+				    "simple-framebuffer";
+			amlogic,pipeline = "vpu-hdmi";
+			clocks = <&clkc CLKID_HDMI>,
+				 <&clkc CLKID_HTX_PCLK>,
+				 <&clkc CLKID_VPU_INTR>;
+			status = "disabled";
+		};
+	};
+
 	efuse: efuse {
 		compatible = "amlogic,meson-gxbb-efuse";
 		clocks = <&clkc CLKID_EFUSE>;
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12.dtsi
index 0d9df29994f3..d80d8a982917 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12.dtsi
@@ -342,3 +342,11 @@
 &sd_emmc_a {
 	amlogic,dram-access-quirk;
 };
+
+&simplefb_cvbs {
+	power-domains = <&pwrc PWRC_G12A_VPU_ID>;
+};
+
+&simplefb_hdmi {
+	power-domains = <&pwrc PWRC_G12A_VPU_ID>;
+};
diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
index 1fdc5af5ae23..f89d744c9648 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
@@ -147,6 +147,14 @@
 	compatible = "amlogic,meson-sm1-pwrc";
 };
 
+&simplefb_cvbs {
+	power-domains = <&pwrc PWRC_SM1_VPU_ID>;
+};
+
+&simplefb_hdmi {
+	power-domains = <&pwrc PWRC_SM1_VPU_ID>;
+};
+
 &vpu {
 	power-domains = <&pwrc PWRC_SM1_VPU_ID>;
 };
-- 
2.22.0