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[34.90.227.64]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aab960681dbsm326648666b.52.2024.12.16.05.06.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Dec 2024 05:06:27 -0800 (PST) From: =?utf-8?q?Andr=C3=A9_Draszik?= Date: Mon, 16 Dec 2024 13:06:27 +0000 Subject: [PATCH 2/4] arm64: dts: exynos: gs101-oriole: configure simple-framebuffer Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241216-gs101-simplefb-v1-2-8ccad1830281@linaro.org> References: <20241216-gs101-simplefb-v1-0-8ccad1830281@linaro.org> In-Reply-To: <20241216-gs101-simplefb-v1-0-8ccad1830281@linaro.org> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Peter Griffin , Tudor Ambarus , Alim Akhtar Cc: Will McVicker , kernel-team@android.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Draszik?= X-Mailer: b4 0.13.0 The bootloader configures the display hardware for a framebuffer at the given address, let's add a simple-framebuffer node here until we get a proper DRM driver. This has several benefits since it's an OLED display: * energy consumption goes down significantly, as it changes from white (as left by bootloader) to black (linux console), and we generally don't run out of battery anymore when plugged into a USB port * less of a burn-in effect I assume * phone stays cooler due to reduced energy consumption by display Signed-off-by: André Draszik --- arch/arm64/boot/dts/exynos/google/gs101-oriole.dts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts index e58881c61d53..4e1625e3fbb4 100644 --- a/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts +++ b/arch/arm64/boot/dts/exynos/google/gs101-oriole.dts @@ -23,9 +23,23 @@ aliases { }; 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@fac00000 { + compatible = "simple-framebuffer"; + reg = <0x0 0xfac00000 (1080 * 2400 * 4)>; + width = <1080>; + height = <2400>; + stride = <(1080 * 4)>; + format = "a8r8g8b8"; + }; }; gpio-keys { @@ -69,6 +83,13 @@ ufs_0_fixed_vcc_reg: regulator-1 { regulator-boot-on; enable-active-high; }; + + reserved-memory { + cont_splash_mem: splash@fac00000 { + reg = <0x0 0xfac00000 (1080 * 2400 * 4)>; + no-map; + }; + }; }; &ext_24_5m {