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Message-Id: <20241220-gs101-simplefb-v2-2-c10a8f9e490b@linaro.org>
Date: Fri, 20 Dec 2024 11:27:25 +0000
From: André Draszik <andre.draszik@...aro.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Peter Griffin <peter.griffin@...aro.org>,
Tudor Ambarus <tudor.ambarus@...aro.org>,
Alim Akhtar <alim.akhtar@...sung.com>
Cc: Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
André Draszik <andre.draszik@...aro.org>
Subject: [PATCH v2 2/3] arm64: dts: exynos: gs101-pixel: add generic
gs101-based Pixel support
In order to support Pixel 6 (Oriole), Pixel 6 Pro (Raven), and Pixel 6a
(Bluejay) correctly, we have to be able to distinguish them properly as
we add support for more features.
For example, Raven has a larger display. There are other differences,
like battery design capacity, etc.
To facilitate this, we create a generic gs101-based Pixel DT that can
work on any such gs101-based device. At the same time, we move the
Oriole specific parts that we have at the moment (display) into an
overlay, making it easy to add support for Raven and Bluejay in a
similar way.
Note1:
Despite being an overlay, we instruct kbuild to create a merged
gs101-oriole.dtb and a gs101-oriole.dtbo. This way existing scripts can
keep working, but it also gives the option to just apply the overlay
before boot (e.g. by the bootloader).
Note2:
I've changed the simple-framebuffer node to specify the memory via
memory-region instead of reg, as that avoids unnecessary duplication
(of the size), and it avoids having to specify #address-cells
and #size-cells in the chosen node (and duplicating this in the DTSO),
which is otherwise necessary to keep dt_binding_check happy and DT
validation working in general.
Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
Note: MAINTAINERS doesn't need updating, it covers this whole directory
---
arch/arm64/boot/dts/exynos/google/Makefile | 6 ++--
.../arm64/boot/dts/exynos/google/gs101-oriole.dtso | 33 ++++++++++++++++++++++
.../{gs101-oriole.dts => gs101-pixel-generic.dts} | 24 +++++++---------
3 files changed, 47 insertions(+), 16 deletions(-)
diff --git a/arch/arm64/boot/dts/exynos/google/Makefile b/arch/arm64/boot/dts/exynos/google/Makefile
index 0a6d5e1fe4ee..6e6b5319212a 100644
--- a/arch/arm64/boot/dts/exynos/google/Makefile
+++ b/arch/arm64/boot/dts/exynos/google/Makefile
@@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
-dtb-$(CONFIG_ARCH_EXYNOS) += \
- gs101-oriole.dtb \
+dtb-$(CONFIG_ARCH_EXYNOS) += gs101-pixel-generic.dtb
+
+gs101-oriole-dtbs := gs101-pixel-generic.dtb gs101-oriole.dtbo
+dtb-$(CONFIG_ARCH_EXYNOS) += gs101-oriole.dtb
diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dtso b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dtso
new file mode 100644
index 000000000000..43572039cd07
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dtso
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Oriole Device Tree
+ *
+ * Copyright 2021-2023 Google LLC
+ * Copyright 2023-2024 Linaro Ltd
+ */
+
+/dts-v1/;
+/plugin/;
+
+&{/} {
+ model = "Oriole";
+ compatible = "google,gs101-oriole", "google,gs101-pixel", "google,gs101";
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <1>;
+
+ splash@...00000 {
+ reg = <0x0 0xfac00000 (1080 * 2400 * 4)>;
+ status = "okay";
+ };
+ };
+};
+
+&framebuffer0 {
+ width = <1080>;
+ height = <2400>;
+ stride = <(1080 * 4)>;
+ format = "a8r8g8b8";
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-pixel-generic.dts
similarity index 93%
rename from arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
rename to arch/arm64/boot/dts/exynos/google/gs101-pixel-generic.dts
index 4e1625e3fbb4..48dc37afcb86 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts
+++ b/arch/arm64/boot/dts/exynos/google/gs101-pixel-generic.dts
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Oriole Device Tree
+ * generic gs101-based Pixel Device Tree
*
* Copyright 2021-2023 Google LLC
* Copyright 2023 Linaro Ltd - <peter.griffin@...aro.org>
@@ -15,30 +15,24 @@
#include "gs101.dtsi"
/ {
- model = "Oriole";
- compatible = "google,gs101-oriole", "google,gs101";
+ model = "GS101-based Pixel or derivative";
+ compatible = "google,gs101-pixel", "google,gs101";
aliases {
serial0 = &serial_0;
};
chosen {
- #address-cells = <2>;
- #size-cells = <1>;
- ranges;
-
/* Bootloader expects bootargs specified otherwise it crashes */
bootargs = "";
stdout-path = &serial_0;
/* Use display framebuffer as setup by bootloader */
- framebuffer0: framebuffer@...00000 {
+ framebuffer0: framebuffer-0 {
compatible = "simple-framebuffer";
- reg = <0x0 0xfac00000 (1080 * 2400 * 4)>;
- width = <1080>;
- height = <2400>;
- stride = <(1080 * 4)>;
- format = "a8r8g8b8";
+ memory-region = <&cont_splash_mem>;
+ /* format properties to be added by board overlay */
+ status = "disabled";
};
};
@@ -86,8 +80,10 @@ ufs_0_fixed_vcc_reg: regulator-1 {
reserved-memory {
cont_splash_mem: splash@...00000 {
- reg = <0x0 0xfac00000 (1080 * 2400 * 4)>;
+ /* size to be updated by board overlay */
+ reg = <0x0 0xfac00000 0x0>;
no-map;
+ status = "disabled";
};
};
};
--
2.47.1.613.gc27f4b7a9f-goog
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